Merge remote-tracking branch 'origin/main' into bb/projects-paradigm

Nest preview links under the background group, open preview links in the
browser by default (⌘/Ctrl-click for the in-app pane), and auto-dismiss
finished background-process rows after a short linger (longer for failures).

.github/actions/detect-changes/action.yml

@@ -0,0 +1,62 @@
+name: Detect affected areas
+description: >-
+  Classify a PR's changed files into CI work lanes (python, frontend, site,
+  scan, deps, mcp_catalog) so the orchestrator can conditionally call only
+  the sub-workflows a PR can affect. Outputs are always "true" on push/dispatch
+  events and fail open (everything "true") when the diff cannot be computed.
+
+outputs:
+  python:
+    description: Run Python tests / ruff / ty / windows-footguns.
+    value: ${{ steps.classify.outputs.python }}
+  frontend:
+    description: Run the TypeScript typecheck matrix + desktop build.
+    value: ${{ steps.classify.outputs.frontend }}
+  docker_meta:
+    description: Docker setup and meta files have changed.
+    value: ${{ steps.classify.outputs.docker_meta }}
+  site:
+    description: Build the Docusaurus docs site.
+    value: ${{ steps.classify.outputs.site }}
+  scan:
+    description: Run the supply-chain critical-pattern scanner.
+    value: ${{ steps.classify.outputs.scan }}
+  deps:
+    description: Check pyproject.toml dependency upper bounds.
+    value: ${{ steps.classify.outputs.deps }}
+  mcp_catalog:
+    description: Require MCP catalog security review label.
+    value: ${{ steps.classify.outputs.mcp_catalog }}
+
+runs:
+  using: composite
+  steps:
+    - name: Classify changed files
+      id: classify
+      shell: bash
+      env:
+        GH_TOKEN: ${{ github.token }}
+        REPO: ${{ github.repository }}
+        EVENT_NAME: ${{ github.event_name }}
+        BASE_SHA: ${{ github.event.pull_request.base.sha }}
+        HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+      run: |
+        set -euo pipefail
+
+        # Only pull_request events are gated. Other events (push, release,
+        # dispatch) leave CHANGED empty, so the classifier fails open and every
+        # lane runs. Post-merge / on-demand validation is never weakened.
+        if [ "$EVENT_NAME" = "pull_request" ]; then
+          # Use the compare endpoint with the pinned base/head SHAs from the
+          # event payload instead of the "current PR files" endpoint. The SHAs
+          # are frozen at trigger time, so the file list is deterministic even
+          # if the PR receives a new push between trigger and detect.
+          CHANGED="$(gh api \
+            --paginate \
+            "repos/${REPO}/compare/${BASE_SHA}...${HEAD_SHA}" \
+            --jq '.files[].filename' || true)"
+        fi
+
+        echo "Changed files:"
+        printf '%s\n' "${CHANGED:-(none)}"
+        printf '%s\n' "${CHANGED:-}" | python3 scripts/ci/classify_changes.py

.github/actions/retry/action.yml

@@ -0,0 +1,50 @@
+name: Retry a flaky command
+description: >-
+  Run a shell command, retrying on non-zero exit. For dependency installs
+  (npm ci, uv sync) whose only failures are transient network/toolchain
+  flakes — a node-gyp header fetch, a registry blip — so CI self-heals
+  instead of needing a manual re-run.
+
+inputs:
+  command:
+    description: Shell command to run (and retry).
+    required: true
+  attempts:
+    description: Max attempts before giving up.
+    default: "3"
+  delay:
+    description: Seconds to wait between attempts.
+    default: "10"
+  working-directory:
+    description: Directory to run in.
+    default: "."
+
+runs:
+  using: composite
+  steps:
+    - shell: bash
+      working-directory: ${{ inputs.working-directory }}
+      # command goes through env, never interpolated into the script body, so
+      # a command with quotes/specials can't break or inject into the runner.
+      env:
+        _CMD: ${{ inputs.command }}
+        _ATTEMPTS: ${{ inputs.attempts }}
+        _DELAY: ${{ inputs.delay }}
+      run: |
+        set -uo pipefail
+        n=0
+        while :; do
+          n=$((n + 1))
+          echo "::group::attempt $n/$_ATTEMPTS: $_CMD"
+          if bash -c "$_CMD"; then
+            echo "::endgroup::"
+            exit 0
+          fi
+          echo "::endgroup::"
+          if [ "$n" -ge "$_ATTEMPTS" ]; then
+            echo "::error::failed after $n attempts: $_CMD"
+            exit 1
+          fi
+          echo "::warning::attempt $n failed; retrying in ${_DELAY}s: $_CMD"
+          sleep "$_DELAY"
+        done

.github/workflows/build-windows-installer.yml

@@ -1,100 +0,0 @@
-name: Build Windows Installer
-
-on:
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  # Gate: workflow_dispatch is already restricted to users with write access,
-  # but we want ADMIN-only. Explicitly check the triggering actor's repo
-  # permission via the API and fail fast for anyone below admin.
-  authorize:
-    name: Authorize (admins only)
-    runs-on: ubuntu-latest
-    timeout-minutes: 5
-    steps:
-      - name: Check actor is a repo admin
-        env:
-          GH_TOKEN: ${{ github.token }}
-          ACTOR: ${{ github.actor }}
-        run: |
-          set -euo pipefail
-          perm=$(gh api \
-            "repos/${{ github.repository }}/collaborators/${ACTOR}/permission" \
-            --jq '.permission')
-          echo "Actor '${ACTOR}' has permission: ${perm}"
-          if [ "${perm}" != "admin" ]; then
-            echo "::error::'${ACTOR}' is not a repo admin (permission=${perm}). Refusing to build/sign."
-            exit 1
-          fi
-          echo "Authorized: '${ACTOR}' is an admin."
-
-  build:
-    name: Hermes-Setup.exe
-    needs: authorize
-    runs-on: windows-latest
-    timeout-minutes: 30
-    permissions:
-      contents: read
-      # Required for OIDC auth to Azure (azure/login federated credentials).
-      id-token: write
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
-
-      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4
-        with:
-          node-version: 22
-          cache: npm
-
-      - name: Install npm dependencies
-        run: npm ci
-
-      - name: Setup Rust
-        uses: dtolnay/rust-toolchain@29eef336d9b2848a0b548edc03f92a220660cdb8  # stable
-
-      - name: Cache Rust targets
-        uses: Swatinem/rust-cache@e18b497796c12c097a38f9edb9d0641fb99eee32  # v2
-        with:
-          workspaces: apps/bootstrap-installer/src-tauri
-
-      - name: Build installer
-        run: npm run tauri:build
-        working-directory: apps/bootstrap-installer
-
-      - name: Azure login (OIDC)
-        uses: azure/login@a457da9ea143d694b1b9c7c869ebb04ebe844ef5  # v2
-        with:
-          client-id: ${{ secrets.AZURE_CLIENT_ID }}
-          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
-          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
-
-      - name: Sign Hermes-Setup.exe with Azure Artifact Signing
-        uses: azure/artifact-signing-action@c7ab2a863ab5f9a846ddb8265964877ef296ee82  # v2
-        with:
-          endpoint: ${{ vars.AZURE_SIGNING_ENDPOINT }}
-          signing-account-name: ${{ vars.AZURE_SIGNING_ACCOUNT_NAME }}
-          certificate-profile-name: ${{ vars.AZURE_SIGNING_CERTIFICATE_PROFILE }}
-          # Sign both the raw exe and the bundled NSIS installer.
-          files-folder: ${{ github.workspace }}\apps\bootstrap-installer\src-tauri\target\release
-          files-folder-filter: exe
-          files-folder-recurse: true
-          file-digest: SHA256
-          timestamp-rfc3161: http://timestamp.acs.microsoft.com
-          timestamp-digest: SHA256
-
-      - name: Upload NSIS installer
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
-        with:
-          name: Hermes-Setup-installer
-          path: apps/bootstrap-installer/src-tauri/target/release/bundle/nsis/*.exe
-
-      - name: Upload raw exe
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
-        with:
-          name: Hermes-Setup-exe
-          path: apps/bootstrap-installer/src-tauri/target/release/Hermes-Setup.exe

.github/workflows/ci.yml

@@ -0,0 +1,146 @@
+name: CI
+
+# Orchestrator workflow. Runs ``detect-changes`` once, then conditionally
+# calls the sub-workflows that a PR can actually affect. A final
+# ``all-checks-pass`` gate job aggregates results so branch protection only
+# needs to require a single check.
+#
+# Sub-workflows are triggered via ``workflow_call`` and keep their own job
+# definitions, matrices, and concurrency settings. They no longer have
+# ``push:`` / ``pull_request:`` triggers of their own — everything flows
+# through this file.
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+  pull-requests: write # needed by lint (PR comment) + supply-chain (PR comment)
+  actions: read # needed by osv-scanner (SARIF upload)
+  security-events: write # needed by osv-scanner (SARIF upload)
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  # ─────────────────────────────────────────────────────────────────────
+  # detect: run the classifier once. Every downstream job reads its outputs
+  # to decide whether to run. On push/dispatch the classifier fails open
+  # (all lanes true) so post-merge validation is never weakened.
+  # ─────────────────────────────────────────────────────────────────────
+  detect:
+    runs-on: ubuntu-latest
+    outputs:
+      python: ${{ steps.classify.outputs.python }}
+      frontend: ${{ steps.classify.outputs.frontend }}
+      site: ${{ steps.classify.outputs.site }}
+      scan: ${{ steps.classify.outputs.scan }}
+      deps: ${{ steps.classify.outputs.deps }}
+      docker_meta: ${{ steps.classify.outputs.docker_meta }}
+      mcp_catalog: ${{ steps.classify.outputs.mcp_catalog }}
+      event_name: ${{ github.event_name }}
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Detect affected areas
+        id: classify
+        uses: ./.github/actions/detect-changes
+
+  # ─────────────────────────────────────────────────────────────────────
+  # Lane-gated sub-workflows. Each runs in parallel after detect finishes.
+  # Skipped workflows (if condition is false) don't spin up runners.
+  # ─────────────────────────────────────────────────────────────────────
+  tests:
+    needs: detect
+    if: needs.detect.outputs.python == 'true'
+    uses: ./.github/workflows/tests.yml
+
+  lint:
+    needs: detect
+    if: needs.detect.outputs.python == 'true'
+    uses: ./.github/workflows/lint.yml
+    with:
+      event_name: ${{ needs.detect.outputs.event_name }}
+
+  typecheck:
+    needs: detect
+    if: needs.detect.outputs.frontend == 'true'
+    uses: ./.github/workflows/typecheck.yml
+
+  docs-site:
+    needs: detect
+    if: needs.detect.outputs.site == 'true'
+    uses: ./.github/workflows/docs-site-checks.yml
+
+  history-check:
+    needs: detect
+    if: needs.detect.outputs.event_name == 'pull_request'
+    uses: ./.github/workflows/history-check.yml
+
+  contributor-check:
+    needs: detect
+    if: needs.detect.outputs.python == 'true'
+    uses: ./.github/workflows/contributor-check.yml
+
+  uv-lockfile:
+    needs: detect
+    uses: ./.github/workflows/uv-lockfile-check.yml
+
+  docker-lint:
+    needs: detect
+    if: needs.detect.outputs.docker_meta == 'true'
+    uses: ./.github/workflows/docker-lint.yml
+
+  supply-chain:
+    needs: detect
+    if: needs.detect.outputs.event_name == 'pull_request' && (needs.detect.outputs.scan == 'true' || needs.detect.outputs.deps == 'true' || needs.detect.outputs.mcp_catalog == 'true')
+    uses: ./.github/workflows/supply-chain-audit.yml
+    with:
+      event_name: ${{ needs.detect.outputs.event_name }}
+      scan: ${{ needs.detect.outputs.scan == 'true' }}
+      deps: ${{ needs.detect.outputs.deps == 'true' }}
+      mcp_catalog: ${{ needs.detect.outputs.mcp_catalog == 'true' }}
+
+  osv-scanner:
+    needs: detect
+    uses: ./.github/workflows/osv-scanner.yml
+
+  # ─────────────────────────────────────────────────────────────────────
+  # Gate: runs after everything. ``if: always()`` ensures it reports a
+  # status even when some deps were skipped. Only actual ``failure``
+  # results cause it to fail; ``skipped`` is treated as success.
+  #
+  # Branch protection should require ONLY this check.
+  # ─────────────────────────────────────────────────────────────────────
+  all-checks-pass:
+    name: All required checks pass
+    needs:
+      - tests
+      - lint
+      - typecheck
+      - docs-site
+      - history-check
+      - contributor-check
+      - uv-lockfile
+      - docker-lint
+      - supply-chain
+      - osv-scanner
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+      - name: Evaluate job results
+        env:
+          RESULTS: ${{ toJSON(needs.*.result) }}
+        run: |
+          echo "$RESULTS" | python3 -c "
+          import json, sys
+          results = json.load(sys.stdin)
+          failed = [r for r in results if r == 'failure']
+          if failed:
+              print(f'::error::{len(failed)} job(s) failed')
+              sys.exit(1)
+          print('All checks passed (or were skipped)')
+          "

.github/workflows/contributor-check.yml

@@ -1,11 +1,8 @@
 name: Contributor Attribution Check
 
 on:
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
+
 permissions:
   contents: read
 
@@ -17,21 +14,7 @@ jobs:
         with:
           fetch-depth: 0  # Full history needed for git log
 
-      - name: Check if relevant files changed
-        id: filter
-        run: |
-          BASE="${{ github.event.pull_request.base.sha }}"
-          HEAD="${{ github.event.pull_request.head.sha }}"
-          CHANGED=$(git diff --name-only "$BASE"..."$HEAD" -- '*.py' '**/*.py' '.github/workflows/contributor-check.yml' || true)
-          if [ -n "$CHANGED" ]; then
-            echo "run=true" >> "$GITHUB_OUTPUT"
-          else
-            echo "run=false" >> "$GITHUB_OUTPUT"
-            echo "No Python files changed, skipping attribution check."
-          fi
-
       - name: Check for unmapped contributor emails
-        if: steps.filter.outputs.run == 'true'
         run: |
           # Get the merge base between this PR and main
           MERGE_BASE=$(git merge-base origin/main HEAD)

.github/workflows/docker-lint.yml

@@ -11,19 +11,7 @@ name: Docker / shell lint
 # activate script doesn't exist at lint time.
 
 on:
-  push:
-    branches: [main]
-    paths:
-      - Dockerfile
-      - docker/**
-      - .hadolint.yaml
-      - .github/workflows/docker-lint.yml
-
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
 
 permissions:
   contents: read

.github/workflows/docker-publish.yml

@@ -56,13 +56,21 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
 
+      # The image build + smoke test + integration tests run ONLY on
+      # push-to-main and release — never on PRs. They are the heaviest jobs
+      # in CI (~15-45 min) and a broken build surfaces on the main push (and
+      # is gated pre-merge by docker-lint + uv-lockfile-check). Every step
+      # below is skipped on PRs, so the job still reports green and the
+      # required check never hangs.
       - name: Set up Docker Buildx
+        if: github.event_name != 'pull_request'
         uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3
 
       # Build once, load into the local daemon for smoke testing.  Cached
       # to gha with a per-arch scope; the push step below reuses every
       # layer from this build.
       - name: Build image (amd64, smoke test)
+        if: github.event_name != 'pull_request'
         uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f  # v7.1.0
         with:
           context: .
@@ -76,6 +84,7 @@ jobs:
           cache-to: type=gha,mode=max,scope=docker-amd64
 
       - name: Smoke test image
+        if: github.event_name != 'pull_request'
         uses: ./.github/actions/hermes-smoke-test
         with:
           image: ${{ env.IMAGE_NAME }}:test
@@ -102,12 +111,15 @@ jobs:
       # cheapest path to coverage on every PR that touches docker code.
       # ---------------------------------------------------------------------
       - name: Install uv (for docker tests)
+        if: github.event_name != 'pull_request'
         uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86  # v5
 
       - name: Set up Python 3.11 (for docker tests)
+        if: github.event_name != 'pull_request'
         run: uv python install 3.11
 
       - name: Install Python dependencies (for docker tests)
+        if: github.event_name != 'pull_request'
         run: |
           uv venv .venv --python 3.11
           source .venv/bin/activate
@@ -118,6 +130,7 @@ jobs:
           uv pip install -e ".[dev]"
 
       - name: Run docker integration tests
+        if: github.event_name != 'pull_request'
         env:
           # Skip rebuild; use the image already loaded by the build step.
           HERMES_TEST_IMAGE: ${{ env.IMAGE_NAME }}:test
@@ -190,7 +203,9 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
 
+      # arm64 build runs only on push-to-main and release (see build-amd64).
       - name: Set up Docker Buildx
+        if: github.event_name != 'pull_request'
         uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3
 
       # Log in to ghcr.io so the registry-backed build cache below can be
@@ -201,41 +216,21 @@ jobs:
       # crashed the build before the smoke test (the reason the gha cache
       # was removed from arm64 PRs in the first place).
       - name: Log in to ghcr.io (build cache)
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121  # v4.1.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      # Build once, load into the local daemon for smoke testing.
-      #
-      # PR builds use the registry-backed cache READ-ONLY (cache-from only):
-      # they pull warm layers pushed by the most recent main build but never
-      # write, so rapid PR pushes don't race on cache writes or pollute the
-      # cache ref.  This restores warm-cache speed to arm64 PR builds (which
-      # were running fully uncached and were ~45% slower than amd64, making
-      # them the job most often cancelled on supersede).
+      # Build once, load into the local daemon for smoke testing, then push
+      # by digest below. Reads AND writes the registry-backed cache so the
+      # push reuses layers from this build and the next build starts warm.
       #
       # Registry cache (type=registry on ghcr.io) is used instead of the gha
       # cache that previously broke here: its credential is the job-lifetime
       # GITHUB_TOKEN, not a short-lived SAS token, so the cold-build-outlives-
       # token failure mode cannot recur.
-      - name: Build image (arm64, smoke test, cache read-only PR)
-        if: github.event_name == 'pull_request'
-        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f  # v7.1.0
-        with:
-          context: .
-          file: Dockerfile
-          load: true
-          platforms: linux/arm64
-          tags: ${{ env.IMAGE_NAME }}:test
-          build-args: |
-            HERMES_GIT_SHA=${{ github.sha }}
-          cache-from: type=registry,ref=ghcr.io/nousresearch/hermes-agent:buildcache-arm64
-
-      # Main/release builds read AND write the registry cache so the digest
-      # push below reuses layers from this smoke-test build, and so the next
-      # PR/main build starts warm.
       - name: Build image (arm64, smoke test, cached publish)
         if: github.event_name != 'pull_request'
         uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f  # v7.1.0
@@ -251,6 +246,7 @@ jobs:
           cache-to: type=registry,ref=ghcr.io/nousresearch/hermes-agent:buildcache-arm64,mode=max
 
       - name: Smoke test image
+        if: github.event_name != 'pull_request'
         uses: ./.github/actions/hermes-smoke-test
         with:
           image: ${{ env.IMAGE_NAME }}:test

.github/workflows/docs-site-checks.yml

@@ -1,13 +1,7 @@
 name: Docs Site Checks
 
 on:
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
-
-  workflow_dispatch:
+  workflow_call:
 
 permissions:
   contents: read
@@ -25,15 +19,19 @@ jobs:
           cache-dependency-path: website/package-lock.json
 
       - name: Install website dependencies
-        run: npm ci
-        working-directory: website
+        uses: ./.github/actions/retry
+        with:
+          command: npm ci
+          working-directory: website
 
       - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.11"
 
       - name: Install ascii-guard
-        run: python -m pip install ascii-guard==2.3.0 pyyaml==6.0.3
+        uses: ./.github/actions/retry
+        with:
+          command: python -m pip install ascii-guard==2.3.0 pyyaml==6.0.3
 
       - name: Extract skill metadata for dashboard
         run: python3 website/scripts/extract-skills.py

.github/workflows/history-check.yml

@@ -14,11 +14,7 @@ name: History Check
 # the PR head and main to be non-empty.
 
 on:
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
 
 permissions:
   contents: read

.github/workflows/lint.yml

@@ -9,18 +9,12 @@ name: Lint (ruff + ty)
 #      enforcement fails.
 
 on:
-  push:
-    branches: [main]
-    paths-ignore:
-      - "**/*.md"
-      - "docs/**"
-      - "website/**"
-
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
+    inputs:
+      event_name:
+        description: The event name from the calling orchestrator (pull_request or push).
+        type: string
+        required: true
 
 permissions:
   contents: read
@@ -33,6 +27,7 @@ concurrency:
 jobs:
   lint-diff:
     name: ruff + ty diff
+    if: inputs.event_name == 'pull_request'
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
@@ -45,16 +40,16 @@ jobs:
         uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5
 
       - name: Install ruff + ty
-        run: |
-          uv tool install ruff
-          uv tool install ty
+        uses: ./.github/actions/retry
+        with:
+          command: uv tool install ruff && uv tool install ty
 
       - name: Determine base ref
         id: base
         run: |
           # For PRs, diff against the merge base with the target branch.
           # For pushes to main, diff against the previous commit on main.
-          if [ "${{ github.event_name }}" = "pull_request" ]; then
+          if [ "${{ inputs.event_name }}" = "pull_request" ]; then
             BASE_SHA=$(git merge-base "origin/${{ github.base_ref }}" HEAD)
             BASE_REF="origin/${{ github.base_ref }}"
           else
@@ -110,7 +105,7 @@ jobs:
             --base-ty   .lint-reports/base/ty.json \
             --head-ty   .lint-reports/head/ty.json \
             --base-ref  "${{ steps.base.outputs.ref }}" \
-            --head-ref  "${{ github.event_name == 'pull_request' && github.head_ref || github.ref_name }}" \
+            --head-ref  "${{ inputs.event_name == 'pull_request' && github.head_ref || github.ref_name }}" \
             --output    .lint-reports/summary.md
           cat .lint-reports/summary.md >> "$GITHUB_STEP_SUMMARY"
 
@@ -122,7 +117,7 @@ jobs:
           retention-days: 14
 
       - name: Post / update PR comment
-        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
+        if: inputs.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
         continue-on-error: true
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
         with:
@@ -172,7 +167,9 @@ jobs:
         uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5
 
       - name: Install ruff
-        run: uv tool install ruff
+        uses: ./.github/actions/retry
+        with:
+          command: uv tool install ruff
 
       - name: ruff check .
         # No --exit-zero, no || true. Exit code propagates to the job,

.github/workflows/osv-scanner.yml

@@ -1,8 +1,8 @@
 name: OSV-Scanner
 
 # Scans lockfiles (uv.lock, package-lock.json) against the OSV vulnerability
-# database. Runs on every PR that touches a lockfile and on a weekly schedule
-# against main.
+# database. Runs on every PR/push (via the ci.yml orchestrator's workflow_call)
+# and on a weekly schedule against main.
 #
 # This is detection-only — OSV-Scanner does NOT open PRs or modify pins.
 # It reports known CVEs in currently-pinned dependency versions so we can
@@ -10,9 +10,9 @@ name: OSV-Scanner
 # (full SHA / exact version) is preserved; only the notification signal
 # is added.
 #
-# Complements the existing supply-chain-audit.yml workflow (which scans
-# for malicious code patterns in PR diffs) by covering the orthogonal
-# "currently-pinned dep became known-vulnerable" case.
+# Complements the supply-chain-audit.yml workflow (which scans for malicious
+# code patterns in PR diffs) by covering the orthogonal "currently-pinned
+# dep became known-vulnerable" case.
 #
 # Uses Google's officially-recommended reusable workflow, pinned by SHA.
 # Findings land in the repo's Security tab (Code Scanning > OSV-Scanner).
@@ -20,19 +20,7 @@ name: OSV-Scanner
 # vulnerabilities in pinned deps that we may need to patch deliberately.
 
 on:
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
-  push:
-    branches: [main]
-    paths:
-      - "uv.lock"
-      - "pyproject.toml"
-      - "package.json"
-      - "package-lock.json"
-      - "website/package-lock.json"
+  workflow_call:
   schedule:
     # Weekly scan against main — catches CVEs published after merge for
     # deps that haven't changed since.

.github/workflows/supply-chain-audit.yml

@@ -1,16 +1,5 @@
 name: Supply Chain Audit
 
-on:
-  # No paths filter — the jobs must always run so required checks
-  # report a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    types: [opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: read
-
 # Narrow, high-signal scanner. Only fires on critical indicators of supply
 # chain attacks (e.g. the litellm-style payloads). Low-signal heuristics
 # (plain base64, plain exec/eval, dependency/Dockerfile/workflow edits,
@@ -19,56 +8,40 @@ permissions:
 # the scanner. Keep this file's checks ruthlessly narrow: if you find
 # yourself adding WARNING-tier patterns here again, make a separate
 # advisory-only workflow instead.
+#
+# Path-gating is handled centrally by the ``ci.yml`` orchestrator's
+# ``detect`` job. The orchestrator passes ``scan`` / ``deps`` /
+# ``mcp_catalog`` booleans as inputs; this workflow's jobs gate on those
+# inputs instead of re-computing the diff.
+
+on:
+  workflow_call:
+    inputs:
+      event_name:
+        description: The event name from the calling orchestrator.
+        type: string
+        required: true
+      scan:
+        description: Whether supply-chain-relevant files changed.
+        type: boolean
+        required: true
+      deps:
+        description: Whether pyproject.toml changed.
+        type: boolean
+        required: true
+      mcp_catalog:
+        description: Whether the MCP catalog / installer changed.
+        type: boolean
+        required: true
+
+permissions:
+  pull-requests: write
+  contents: read
 
 jobs:
-  # ── Path filter (shared by both scan and dep-bounds) ───────────────
-  changes:
-    runs-on: ubuntu-latest
-    outputs:
-      # True when any file the scanner cares about changed in this PR
-      scan: ${{ steps.filter.outputs.scan }}
-      # True when pyproject.toml changed in this PR
-      deps: ${{ steps.filter.outputs.deps }}
-      # True when the curated MCP catalog / bundled MCP manifests changed.
-      mcp_catalog: ${{ steps.filter.outputs.mcp_catalog }}
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-        with:
-          fetch-depth: 0
-      - name: Check for relevant file changes
-        id: filter
-        run: |
-          BASE="${{ github.event.pull_request.base.sha }}"
-          HEAD="${{ github.event.pull_request.head.sha }}"
-          SCAN_FILES=$(git diff --name-only "$BASE"..."$HEAD" -- \
-            '*.py' '**/*.py' '*.pth' '**/*.pth' \
-            'setup.py' 'setup.cfg' \
-            'sitecustomize.py' 'usercustomize.py' '__init__.pth' \
-            'pyproject.toml' || true)
-          if [ -n "$SCAN_FILES" ]; then
-            echo "scan=true" >> "$GITHUB_OUTPUT"
-          else
-            echo "scan=false" >> "$GITHUB_OUTPUT"
-          fi
-          DEPS_FILES=$(git diff --name-only "$BASE"..."$HEAD" -- 'pyproject.toml' || true)
-          if [ -n "$DEPS_FILES" ]; then
-            echo "deps=true" >> "$GITHUB_OUTPUT"
-          else
-            echo "deps=false" >> "$GITHUB_OUTPUT"
-          fi
-          MCP_CATALOG_FILES=$(git diff --name-only "$BASE"..."$HEAD" -- \
-            'optional-mcps/**' \
-            'hermes_cli/mcp_catalog.py' || true)
-          if [ -n "$MCP_CATALOG_FILES" ]; then
-            echo "mcp_catalog=true" >> "$GITHUB_OUTPUT"
-          else
-            echo "mcp_catalog=false" >> "$GITHUB_OUTPUT"
-          fi
-
   scan:
     name: Scan PR for critical supply chain risks
-    needs: changes
-    if: needs.changes.outputs.scan == 'true'
+    if: inputs.scan
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -111,7 +84,7 @@ jobs:
           fi
 
           # --- base64 decode + exec/eval on the same line (the litellm attack pattern) ---
-          B64_EXEC_HITS=$(echo "$DIFF" | grep -n '^\+' | grep -iE 'base64\.(b64decode|decodebytes|urlsafe_b64decode)' | grep -iE 'exec\(|eval\(' | head -10 || true)
+          B64_EXEC_HITS=$(echo "$DIFF" | grep -n '^+' | grep -iE 'base64\.(b64decode|decodebytes|urlsafe_b64decode)' | grep -iE 'exec\(|eval\(' | head -10 || true)
           if [ -n "$B64_EXEC_HITS" ]; then
             FINDINGS="${FINDINGS}
           ### 🚨 CRITICAL: base64 decode + exec/eval combo
@@ -125,7 +98,7 @@ jobs:
           fi
 
           # --- subprocess with encoded/obfuscated command argument ---
-          PROC_HITS=$(echo "$DIFF" | grep -n '^\+' | grep -E 'subprocess\.(Popen|call|run)\s*\(' | grep -iE 'base64|\\x[0-9a-f]{2}|chr\(' | head -10 || true)
+          PROC_HITS=$(echo "$DIFF" | grep -n '^+' | grep -E 'subprocess\.(Popen|call|run)\s*\(' | grep -iE 'base64|\\x[0-9a-f]{2}|chr\(' | head -10 || true)
           if [ -n "$PROC_HITS" ]; then
             FINDINGS="${FINDINGS}
           ### 🚨 CRITICAL: subprocess with encoded/obfuscated command
@@ -187,23 +160,9 @@ jobs:
           echo "::error::CRITICAL supply chain risk patterns detected in this PR. See the PR comment for details."
           exit 1
 
-  # Gate: reports success when scan was skipped (no relevant files changed).
-  # This ensures the required check always gets a status.
-  scan-gate:
-    name: Scan PR for critical supply chain risks
-    needs: changes
-    # always() so the gate still reports SUCCESS even if `changes` fails/is
-    # skipped — without it, a failed dependency would leave the required
-    # check unreported (i.e. "pending"), the exact failure mode this fixes.
-    if: always() && needs.changes.outputs.scan != 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "No supply-chain-relevant files changed, skipping scan."
-
   dep-bounds:
     name: Check PyPI dependency upper bounds
-    needs: changes
-    if: needs.changes.outputs.deps == 'true'
+    if: inputs.deps
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -253,7 +212,7 @@ jobs:
           $(cat /tmp/unbounded.txt)
           \`\`\`
 
-          **Fix:** Add an upper bound, e.g. \`\"package>=1.2.0,<2\"\`
+          **Fix:** Add an upper bound, e.g. \`"package>=1.2.0,<2"\`
 
           ---
           *See PR #2810 and CONTRIBUTING.md for the full policy rationale.*"
@@ -266,23 +225,9 @@ jobs:
           echo "::error::PyPI dependencies without upper bounds detected. Add <next_major ceiling per CONTRIBUTING.md policy."
           exit 1
 
-  # Gate: reports success when dep-bounds was skipped (no pyproject.toml changed).
-  # This ensures the required check always gets a status.
-  dep-bounds-gate:
-    name: Check PyPI dependency upper bounds
-    needs: changes
-    # always() so the gate still reports SUCCESS even if `changes` fails/is
-    # skipped — without it, a failed dependency would leave the required
-    # check unreported (i.e. "pending"), the exact failure mode this fixes.
-    if: always() && needs.changes.outputs.deps != 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "No pyproject.toml changes, skipping dependency bounds check."
-
   mcp-catalog-review:
     name: MCP catalog security review
-    needs: changes
-    if: needs.changes.outputs.mcp_catalog == 'true'
+    if: inputs.mcp_catalog
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -317,11 +262,3 @@ jobs:
           gh pr comment "$PR" --body "$BODY" || echo "::warning::Could not post PR comment (expected for fork PRs)"
           echo "::error::MCP catalog changes require the mcp-catalog-reviewed label."
           exit 1
-
-  mcp-catalog-review-gate:
-    name: MCP catalog security review
-    needs: changes
-    if: always() && needs.changes.outputs.mcp_catalog != 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "No MCP catalog changes, skipping MCP catalog security review."

.github/workflows/tests.yml

@@ -1,21 +1,12 @@
 name: Tests
 
 on:
-  push:
-    branches: [main]
-    paths-ignore:
-      - "**/*.md"
-      - "docs/**"
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
 
 permissions:
   contents: read
 
-# Cancel in-progress runs for the same PR/branch
+# Cancel in-progress runs for the same ref
 concurrency:
   group: tests-${{ github.ref }}
   cancel-in-progress: true
@@ -49,7 +40,7 @@ jobs:
           RG_VERSION=15.1.0
           RG_SHA256=1c9297be4a084eea7ecaedf93eb03d058d6faae29bbc57ecdaf5063921491599
           RG_TARBALL=ripgrep-${RG_VERSION}-x86_64-unknown-linux-musl.tar.gz
-          curl -sSfL -o "$RG_TARBALL" \
+          curl -sSfL --retry 3 --retry-delay 5 -o "$RG_TARBALL" \
             "https://github.com/BurntSushi/ripgrep/releases/download/${RG_VERSION}/${RG_TARBALL}"
           echo "${RG_SHA256}  ${RG_TARBALL}" | sha256sum -c -
           tar -xzf "$RG_TARBALL"
@@ -78,7 +69,9 @@ jobs:
         # fails if the lock is out of sync with pyproject.toml), giving a
         # reproducible env. It also creates .venv itself, so no separate
         # `uv venv` step is needed.
-        run: uv sync --locked --python 3.11 --extra all --extra dev
+        uses: ./.github/actions/retry
+        with:
+          command: uv sync --locked --python 3.11 --extra all --extra dev
 
       - name: Minimize uv cache
         # Optimized for CI: prunes pre-built wheels that are cheap to
@@ -171,7 +164,7 @@ jobs:
           RG_VERSION=15.1.0
           RG_SHA256=1c9297be4a084eea7ecaedf93eb03d058d6faae29bbc57ecdaf5063921491599
           RG_TARBALL=ripgrep-${RG_VERSION}-x86_64-unknown-linux-musl.tar.gz
-          curl -sSfL -o "$RG_TARBALL" \
+          curl -sSfL --retry 3 --retry-delay 5 -o "$RG_TARBALL" \
             "https://github.com/BurntSushi/ripgrep/releases/download/${RG_VERSION}/${RG_TARBALL}"
           echo "${RG_SHA256}  ${RG_TARBALL}" | sha256sum -c -
           tar -xzf "$RG_TARBALL"
@@ -200,7 +193,9 @@ jobs:
         # fails if the lock is out of sync with pyproject.toml), giving a
         # reproducible env. It also creates .venv itself, so no separate
         # `uv venv` step is needed.
-        run: uv sync --locked --python 3.11 --extra all --extra dev
+        uses: ./.github/actions/retry
+        with:
+          command: uv sync --locked --python 3.11 --extra all --extra dev
 
       - name: Minimize uv cache
         # Optimized for CI: prunes pre-built wheels that are cheap to

.github/workflows/typecheck.yml

@@ -2,13 +2,7 @@
 name: Typecheck
 
 on:
-  push:
-    branches: [main]
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
 
 jobs:
   typecheck:
@@ -24,7 +18,14 @@ jobs:
         with:
           node-version: 22
           cache: npm
-      - run: npm ci
+      # --ignore-scripts: typecheck only needs the TS sources + type defs, not
+      # native builds. Skipping install scripts drops node-pty's node-gyp
+      # header fetch — the transient flake that killed this job pre-`tsc` — and
+      # is faster. retry covers the remaining registry blips.
+      - 
+        uses: ./.github/actions/retry
+        with:
+          command: npm ci --ignore-scripts
       - run: npm run --prefix ${{ matrix.package }} typecheck
 
   # Production build of the desktop renderer. `typecheck` runs `tsc` only,
@@ -41,5 +42,10 @@ jobs:
         with:
           node-version: 22
           cache: npm
-      - run: npm ci
+      # Keep install scripts here: the production build may need node-pty's
+      # native binary. retry handles the transient install-time fetch flakes.
+      - 
+        uses: ./.github/actions/retry
+        with:
+          command: npm ci
       - run: npm run --prefix apps/desktop build

.github/workflows/uv-lockfile-check.yml

@@ -44,25 +44,14 @@ name: uv.lock check
 # the same way.  Better to catch it here than after merge.
 
 on:
-  push:
-    branches: [main]
-    paths:
-      - "pyproject.toml"
-      - "uv.lock"
-      - ".github/workflows/uv-lockfile-check.yml"
-
-  # No paths filter — the job must always run so the required check
-  # reports a status (path-gated workflows leave checks "pending" forever
-  # when no matching files change, which blocks merge).
-  pull_request:
-    branches: [main]
+  workflow_call:
 
 permissions:
   contents: read
 
 concurrency:
   group: uv-lockfile-check-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+  cancel-in-progress: true
 
 jobs:
   check:

Dockerfile

@@ -290,6 +290,19 @@ ENV HERMES_TUI_DIR=/opt/hermes/ui-tui
 ENV HERMES_HOME=/opt/data
 ENV HERMES_WRITE_SAFE_ROOT=/opt/data
 ENV HERMES_DISABLE_LAZY_INSTALLS=1
+# The published image seals /opt/hermes (root-owned, read-only) so a runtime
+# lazy install can't mutate the agent's own venv and brick it. But opt-in
+# backends (Firecrawl web search, Exa, Feishu, …) keep their SDKs in
+# tools/lazy_deps.py — deliberately NOT baked into [all] (see pyproject.toml
+# policy 2026-05-12: one quarantined release must not break every install).
+# Redirect those lazy installs to a writable dir on the durable data volume.
+# lazy_deps appends this dir to the END of sys.path, so a package installed
+# here can only ADD modules — it can never shadow or downgrade a core module,
+# so the sealed-venv guarantee holds even with installs re-enabled. The dir
+# is seeded + chowned to the hermes user by docker/stage2-hook.sh and lives
+# on the /opt/data volume, so it persists across container recreates / image
+# updates (an ABI stamp invalidates it if a rebuild bumps the interpreter).
+ENV HERMES_LAZY_INSTALL_TARGET=/opt/data/lazy-packages
 
 # `docker exec` privilege-drop shim. When operators run
 # `docker exec <c> hermes ...` they default to root, and any file the

acp_adapter/entry.py

@@ -23,6 +23,11 @@ except ModuleNotFoundError:
     # new code but ``uv pip install -e .`` didn't finish.  Missing bootstrap
     # means UTF-8 stdio setup is skipped on Windows; POSIX is unaffected.
     pass
+else:
+    # Stop a ``utils/``/``proxy/``/``ui/`` package in the launch directory from
+    # shadowing Hermes's own modules — ``hermes acp`` can be started from any
+    # cwd, including a project that has same-named packages on its path.
+    hermes_bootstrap.harden_import_path()
 
 import argparse
 import asyncio

agent/agent_init.py

@@ -1506,6 +1506,7 @@ def init_agent(
     # 3. Check general plugin system (user-installed plugins)
     # 4. Fall back to built-in ContextCompressor
     _selected_engine = None
+    _copy_failed = False
     _engine_name = "compressor"  # default
     try:
         _ctx_cfg = _agent_cfg.get("context", {}) if isinstance(_agent_cfg, dict) else {}
@@ -1523,15 +1524,35 @@ def init_agent(
 
         # Try general plugin system as fallback
         if _selected_engine is None:
+            _candidate = None
             try:
                 from hermes_cli.plugins import get_plugin_context_engine
                 _candidate = get_plugin_context_engine()
-                if _candidate and _candidate.name == _engine_name:
-                    _selected_engine = _candidate
             except Exception:
-                pass
+                _candidate = None
+            if _candidate is not None and _candidate.name == _engine_name:
+                # Deep-copy the shared plugin singleton so a child agent's
+                # update_model() can't mutate the parent's compressor (#42449).
+                # Copy can fail for engines holding uncopyable state (locks, DB
+                # connections, clients); in that case fall back to the built-in
+                # compressor with an ACCURATE message rather than silently
+                # mislabelling it "not found".
+                import copy
+                try:
+                    _selected_engine = copy.deepcopy(_candidate)
+                except Exception as _copy_err:
+                    _copy_failed = True
+                    _ra().logger.warning(
+                        "Context engine '%s' could not be safely copied for this "
+                        "agent (%s) — falling back to built-in compressor. Plugin "
+                        "engines that hold uncopyable state (locks, DB connections) "
+                        "should implement __deepcopy__ to copy only mutable budget "
+                        "state.",
+                        _engine_name, _copy_err,
+                    )
+                    _selected_engine = None
 
-        if _selected_engine is None:
+        if _selected_engine is None and not _copy_failed:
             _ra().logger.warning(
                 "Context engine '%s' not found — falling back to built-in compressor",
                 _engine_name,
@@ -1621,16 +1642,27 @@ def init_agent(
             for t in agent.tools
             if isinstance(t, dict)
         }
-        for _schema in agent.context_compressor.get_tool_schemas():
-            _tname = _schema.get("name", "")
-            if _tname and _tname in _existing_tool_names:
+        from agent.memory_manager import normalize_tool_schema as _normalize_tool_schema
+        for _raw_schema in agent.context_compressor.get_tool_schemas():
+            _schema = _normalize_tool_schema(_raw_schema)
+            if _schema is None:
+                # A schema with no resolvable name (e.g. an already-wrapped
+                # entry) would append a nameless tool that strict providers
+                # 400 on, disabling the whole toolset (#47707). Skip it.
+                _ra().logger.warning(
+                    "Context engine returned a tool schema with no resolvable "
+                    "name; skipping to avoid poisoning the request (%r)",
+                    _raw_schema,
+                )
+                continue
+            _tname = _schema["name"]
+            if _tname in _existing_tool_names:
                 continue  # already registered via plugin/cache path
             _wrapped = {"type": "function", "function": _schema}
             agent.tools.append(_wrapped)
-            if _tname:
-                agent.valid_tool_names.add(_tname)
-                agent._context_engine_tool_names.add(_tname)
-                _existing_tool_names.add(_tname)
+            agent.valid_tool_names.add(_tname)
+            agent._context_engine_tool_names.add(_tname)
+            _existing_tool_names.add(_tname)
 
     # Notify context engine of session start
     if hasattr(agent, "context_compressor") and agent.context_compressor:

agent/anthropic_adapter.py

@@ -1297,7 +1297,15 @@ def run_oauth_setup_token() -> Optional[str]:
 # Stores credentials in ~/.hermes/.anthropic_oauth.json (our own file).
 
 _OAUTH_CLIENT_ID = "9d1c250a-e61b-44d9-88ed-5944d1962f5e"
-_OAUTH_TOKEN_URL = "https://console.anthropic.com/v1/oauth/token"
+# Anthropic migrated the OAuth token endpoint to platform.claude.com;
+# console.anthropic.com now 404s. Callers should iterate _OAUTH_TOKEN_URLS
+# (new host first, console fallback). _OAUTH_TOKEN_URL is kept as the primary
+# for backward compatibility with existing imports and now points at the live host.
+_OAUTH_TOKEN_URLS = [
+    "https://platform.claude.com/v1/oauth/token",
+    "https://console.anthropic.com/v1/oauth/token",
+]
+_OAUTH_TOKEN_URL = _OAUTH_TOKEN_URLS[0]
 _OAUTH_REDIRECT_URI = "https://console.anthropic.com/oauth/code/callback"
 _OAUTH_SCOPES = "org:create_api_key user:profile user:inference"
 _HERMES_OAUTH_FILE = get_hermes_home() / ".anthropic_oauth.json"
@@ -1395,18 +1403,34 @@ def run_hermes_oauth_login_pure() -> Optional[Dict[str, Any]]:
             "code_verifier": verifier,
         }).encode()
 
-        req = urllib.request.Request(
-            _OAUTH_TOKEN_URL,
-            data=exchange_data,
-            headers={
-                "Content-Type": "application/json",
-                "User-Agent": f"claude-cli/{_get_claude_code_version()} (external, cli)",
-            },
-            method="POST",
-        )
+        # Anthropic migrated the OAuth token endpoint to platform.claude.com;
+        # console.anthropic.com now 404s. Try the new host first, then fall
+        # back to console for older deployments (mirrors the refresh path).
+        result = None
+        last_error = None
+        for endpoint in _OAUTH_TOKEN_URLS:
+            req = urllib.request.Request(
+                endpoint,
+                data=exchange_data,
+                headers={
+                    "Content-Type": "application/json",
+                    "User-Agent": f"claude-cli/{_get_claude_code_version()} (external, cli)",
+                },
+                method="POST",
+            )
+            try:
+                with urllib.request.urlopen(req, timeout=15) as resp:
+                    result = json.loads(resp.read().decode())
+                break
+            except Exception as exc:
+                last_error = exc
+                logger.debug("Anthropic token exchange failed at %s: %s", endpoint, exc)
+                continue
 
-        with urllib.request.urlopen(req, timeout=15) as resp:
-            result = json.loads(resp.read().decode())
+        if result is None:
+            raise last_error if last_error is not None else ValueError(
+                "Anthropic token exchange failed"
+            )
     except Exception as e:
         print(f"Token exchange failed: {e}")
         return None

agent/coding_context.py

@@ -83,6 +83,59 @@ _PROJECT_MARKERS = (
 # Agent-instruction files surfaced separately from manifests in the snapshot.
 _CONTEXT_FILES = ("AGENTS.md", "CLAUDE.md", ".cursorrules")
 
+# Source-file extensions that make a git repo a *code* workspace even with no
+# manifest. Without this, `git init` on a notes/writing/research folder (a huge
+# non-coding use case) would flip the whole session into the coding posture just
+# for having a `.git`. A manifest still wins on its own (see `_PROJECT_MARKERS`).
+_CODE_EXTENSIONS = frozenset({
+    ".py", ".pyi", ".ipynb", ".js", ".jsx", ".ts", ".tsx", ".mjs", ".cjs",
+    ".go", ".rs", ".java", ".kt", ".kts", ".scala", ".rb", ".php", ".c", ".h",
+    ".cc", ".cpp", ".hpp", ".cs", ".swift", ".m", ".mm", ".dart", ".ex", ".exs",
+    ".lua", ".sh", ".bash", ".zsh", ".sql", ".vue", ".svelte", ".r", ".jl",
+    ".hs", ".clj", ".erl", ".pl",
+})
+
+# Dirs never worth scanning for the code check (deps/build/vcs/venv noise).
+_CODE_SCAN_SKIP_DIRS = frozenset({
+    ".git", "node_modules", "venv", ".venv", "__pycache__", "dist", "build",
+    "target", ".next", ".turbo", "vendor",
+})
+
+# Bounded sweep: a code workspace reveals itself in the first handful of entries.
+_CODE_SCAN_MAX_ENTRIES = 500
+
+
+def _has_code_files(root: Path) -> bool:
+    """Cheap, bounded check for source files in a repo's top two levels.
+
+    Lets a git repo of loose scripts (no manifest) still read as a code
+    workspace while a bare notes/writing repo does not. Scans the root and its
+    immediate subdirectories only, capped at ``_CODE_SCAN_MAX_ENTRIES`` stats —
+    a handful of readdirs at session start, not a full walk.
+    """
+    seen = 0
+    stack = [(root, True)]
+    while stack:
+        directory, is_root = stack.pop()
+        try:
+            with os.scandir(directory) as entries:
+                for entry in entries:
+                    seen += 1
+                    if seen > _CODE_SCAN_MAX_ENTRIES:
+                        return False
+                    name = entry.name
+                    try:
+                        if entry.is_file():
+                            if os.path.splitext(name)[1].lower() in _CODE_EXTENSIONS:
+                                return True
+                        elif is_root and entry.is_dir() and name not in _CODE_SCAN_SKIP_DIRS and not name.startswith("."):
+                            stack.append((Path(entry.path), False))
+                    except OSError:
+                        continue
+        except OSError:
+            continue
+    return False
+
 # Lockfile → package manager, checked in priority order.
 _PY_LOCKFILES = (("uv.lock", "uv"), ("poetry.lock", "poetry"), ("Pipfile.lock", "pipenv"))
 _JS_LOCKFILES = (
@@ -368,10 +421,16 @@ def _detect_profile_name(mode: str, platform: str, cwd_str: str) -> str:
     if platform and platform.strip().lower() not in INTERACTIVE_CODING_PLATFORMS:
         return GENERAL_PROFILE.name
     cwd = Path(cwd_str)
+    # A recognized project root (manifest / AGENTS.md / .cursorrules) is a code
+    # workspace on its own — cheap stat checks, no scan.
+    if _marker_root(cwd) is not None:
+        return CODING_PROFILE.name
     git_root = _git_root(cwd)
     if git_root is not None and git_root == _home():
         git_root = None  # dotfiles repo at $HOME — not a code workspace
-    if git_root is not None or _marker_root(cwd) is not None:
+    # A bare git repo only counts when it actually holds code, so `git init` on a
+    # notes/writing/research folder stays in the general posture.
+    if git_root is not None and _has_code_files(git_root):
         return CODING_PROFILE.name
     return GENERAL_PROFILE.name
 
@@ -635,25 +694,32 @@ def _read_small(path: Path) -> str:
         return ""
 
 
-def _project_facts(root: Path) -> list[str]:
-    """Detected project facts for the workspace snapshot.
+@dataclass(frozen=True)
+class ProjectFacts:
+    """Structured project facts — the model's verify loop, detected once.
 
-    The point is to hand the model its *verify loop* up front — which manifest,
-    which package manager, and the exact test/lint/build commands — instead of
-    making it rediscover them every session. Cheap: stat calls plus reads of a
-    couple of small files; built once at prompt-build time (cache-safe).
+    The same data that feeds the workspace snapshot, exposed structurally so
+    non-prompt consumers (e.g. the desktop verify UI) read it instead of
+    re-detecting and drifting from the prompt.
     """
-    facts: list[str] = []
 
+    manifests: list[str]
+    package_managers: list[str]
+    verify_commands: list[str]
+    context_files: list[str]
+
+
+def detect_project_facts(root: Path) -> ProjectFacts:
+    """Detect manifests, package manager(s), verify commands, and context files.
+
+    Cheap: stat calls plus reads of a couple of small files. The single source
+    of truth for both the prompt snapshot (:func:`_project_facts`) and the
+    gateway's ``project.facts`` — so the UI never re-sniffs verify commands.
+    """
     manifests = [m for m in _PROJECT_MARKERS if m not in _CONTEXT_FILES and (root / m).is_file()]
-    package_managers = [
-        pm for lock, pm in (*_PY_LOCKFILES, *_JS_LOCKFILES) if (root / lock).is_file()
-    ]
-    if manifests:
-        line = f"- Project: {', '.join(manifests[:6])}"
-        if package_managers:
-            line += f" ({'/'.join(dict.fromkeys(package_managers))})"
-        facts.append(line)
+    package_managers = list(
+        dict.fromkeys(pm for lock, pm in (*_PY_LOCKFILES, *_JS_LOCKFILES) if (root / lock).is_file())
+    )
 
     verify: list[str] = []
     if (root / "scripts" / "run_tests.sh").is_file():
@@ -673,17 +739,61 @@ def _project_facts(root: Path) -> list[str]:
             f"make {name}" for name in _VERIFY_TARGETS
             if re.search(rf"^{re.escape(name)}\s*:", makefile, re.MULTILINE)
         )
-    if verify:
-        deduped = list(dict.fromkeys(verify))[:_MAX_VERIFY_COMMANDS]
-        facts.append(f"- Verify: {'; '.join(deduped)}")
 
-    context_files = [c for c in _CONTEXT_FILES if (root / c).is_file()]
-    if context_files:
-        facts.append(f"- Context files: {', '.join(context_files)}")
+    return ProjectFacts(
+        manifests=manifests,
+        package_managers=package_managers,
+        verify_commands=list(dict.fromkeys(verify))[:_MAX_VERIFY_COMMANDS],
+        context_files=[c for c in _CONTEXT_FILES if (root / c).is_file()],
+    )
+
+
+def _project_facts(root: Path) -> list[str]:
+    """Render :func:`detect_project_facts` as workspace-snapshot lines.
+
+    Hands the model its *verify loop* up front — which manifest, which package
+    manager, and the exact test/lint/build commands — instead of making it
+    rediscover them every session. Built once at prompt-build time; the string
+    output must stay byte-stable to preserve the prompt cache.
+    """
+    f = detect_project_facts(root)
+    facts: list[str] = []
+
+    if f.manifests:
+        line = f"- Project: {', '.join(f.manifests[:6])}"
+        if f.package_managers:
+            line += f" ({'/'.join(f.package_managers)})"
+        facts.append(line)
+    if f.verify_commands:
+        facts.append(f"- Verify: {'; '.join(f.verify_commands)}")
+    if f.context_files:
+        facts.append(f"- Context files: {', '.join(f.context_files)}")
 
     return facts
 
 
+def project_facts_for(cwd: Optional[str | Path] = None) -> Optional[dict[str, Any]]:
+    """Structured project facts for ``cwd`` — ``None`` outside a workspace.
+
+    Same detection the system-prompt snapshot uses (git root, else marker root),
+    exposed for non-prompt consumers (the desktop verify UI) so they never
+    re-derive "are we coding?" or duplicate the verify-command sniffing.
+    """
+    resolved = _resolve_cwd(cwd)
+    root = _git_root(resolved) or _marker_root(resolved)
+    if root is None:
+        return None
+
+    f = detect_project_facts(root)
+    return {
+        "root": str(root),
+        "manifests": f.manifests,
+        "packageManagers": f.package_managers,
+        "verifyCommands": f.verify_commands,
+        "contextFiles": f.context_files,
+    }
+
+
 def build_coding_workspace_block(cwd: Optional[str | Path] = None) -> str:
     """Workspace snapshot for the system prompt (empty outside a workspace).
 

agent/context_compressor.py

@@ -890,7 +890,15 @@ class ContextCompressor(ContextEngine):
         # This is independent of the abort_on_summary_failure config flag:
         # rotating on a broken credential is never the right behavior.
         self._last_summary_auth_failure: bool = False
-        # When a user-configured summary model fails and we recover by
+        # Set when summary generation ultimately fails due to a transient
+        # network/connection error (httpx/httpcore connection drop, premature
+        # stream close, etc.) — distinct from auth failures but treated the
+        # same way by compress(): ABORT and preserve the session unchanged
+        # rather than destroy the middle window for a deterministic
+        # "summary unavailable" marker. Retrying once the network recovers is
+        # strictly better than discarding context for a transient blip
+        # (#29559, #25585). Independent of abort_on_summary_failure.
+        self._last_summary_network_failure: bool = False
         # retrying on the main model, record the failure so gateway /
         # CLI callers can still warn the user even though compression
         # succeeded.  Silent recovery would hide the broken config.
@@ -1687,6 +1695,7 @@ This compaction should PRIORITISE preserving all information related to the focu
             self._summary_model_fallen_back = False
             self._last_summary_error = None
             self._last_summary_auth_failure = False
+            self._last_summary_network_failure = False
             return self._with_summary_prefix(summary)
         except Exception as e:
             # ``call_llm`` raises ``RuntimeError`` for two very different cases:
@@ -1819,6 +1828,15 @@ This compaction should PRIORITISE preserving all information related to the focu
             if len(err_text) > 220:
                 err_text = err_text[:217].rstrip() + "..."
             self._last_summary_error = err_text
+            # A terminal connection/network failure (we reach this branch only
+            # after any main-model fallback has already been tried or is
+            # unavailable). Flag it so compress() ABORTS and preserves the
+            # session unchanged instead of destroying the middle window for a
+            # placeholder marker — retrying once the network recovers is
+            # strictly better than dropping context (#29559, #25585). Mirrors
+            # the auth-failure carve-out; independent of abort_on_summary_failure.
+            if _is_streaming_closed:
+                self._last_summary_network_failure = True
             logger.warning(
                 "Failed to generate context summary: %s. "
                 "Further summary attempts paused for %d seconds.",
@@ -2382,6 +2400,7 @@ This compaction should PRIORITISE preserving all information related to the focu
         self._last_aux_model_failure_model = None
         self._last_compress_aborted = False
         self._last_summary_auth_failure = False
+        self._last_summary_network_failure = False
 
         # Manual /compress (force=True) bypasses the failure cooldown so the
         # user can retry immediately after an auto-compress abort.  Without
@@ -2498,15 +2517,21 @@ This compaction should PRIORITISE preserving all information related to the focu
         #           surface a warning.
         # Default is False (historical behavior).
         #
-        # EXCEPTION — auth failures always abort. A 401/403 from the summary
-        # call means the credential or endpoint is broken (invalid/blocked
-        # key, or a token pointed at the wrong inference host). Rotating into
+        # EXCEPTION — auth AND transient network failures always abort. A
+        # 401/403 from the summary call means the credential or endpoint is
+        # broken (invalid/blocked key, or a token pointed at the wrong
+        # inference host). A connection/stream-close error means the network
+        # blipped at the compaction moment (#29559). In BOTH cases rotating into
         # a child session with a placeholder summary on a broken credential
         # strands the user on a degraded session for zero benefit — every
         # subsequent call fails the same way. So when the failure was an auth
         # error we abort regardless of abort_on_summary_failure, preserving
         # the conversation unchanged until the credential is fixed.
-        if not summary and (self.abort_on_summary_failure or self._last_summary_auth_failure):
+        if not summary and (
+            self.abort_on_summary_failure
+            or self._last_summary_auth_failure
+            or self._last_summary_network_failure
+        ):
             n_skipped = compress_end - compress_start
             self._last_summary_dropped_count = 0  # nothing actually dropped
             self._last_summary_fallback_used = False
@@ -2521,6 +2546,15 @@ This compaction should PRIORITISE preserving all information related to the focu
                         "with /compress or start fresh with /new.",
                         n_skipped,
                     )
+                elif self._last_summary_network_failure:
+                    logger.warning(
+                        "Summary generation failed with a network/connection "
+                        "error — aborting compression. %d message(s) preserved "
+                        "unchanged; the session was NOT rotated. This is "
+                        "transient: retry with /compress once connectivity "
+                        "recovers, or continue the conversation as-is.",
+                        n_skipped,
+                    )
                 else:
                     logger.warning(
                         "Summary generation failed — aborting compression "

agent/conversation_compression.py

@@ -805,10 +805,11 @@ def try_shrink_image_parts_in_messages(
     Pillow couldn't help (caller should surface the original error).
 
     Strategy: look for ``image_url`` / ``input_image`` parts carrying a
-    ``data:image/...;base64,...`` payload.  For each one whose encoded
-    size exceeds 4 MB (a safe target that slides under Anthropic's 5 MB
-    ceiling with header overhead) or whose longest side exceeds
-    ``max_dimension``, write the base64 to a tempfile, call
+    ``data:image/...;base64,...`` payload, plus Anthropic-native
+    ``{"type": "image", "source": {"type": "base64", ...}}`` blocks.
+    For each one whose encoded size exceeds 4 MB (a safe target that slides
+    under Anthropic's 5 MB ceiling with header overhead) or whose longest side
+    exceeds ``max_dimension``, write the base64 to a tempfile, call
     ``vision_tools._resize_image_for_vision`` to produce a smaller data
     URL, and substitute it in place.
 
@@ -964,6 +965,28 @@ def try_shrink_image_parts_in_messages(
             logger.warning("image-shrink recovery: re-encode failed — %s", exc)
             return None, triggered_by is not None
 
+    def _source_to_data_url(source: Any) -> Optional[str]:
+        if not isinstance(source, dict) or source.get("type") != "base64":
+            return None
+        data = source.get("data")
+        if not isinstance(data, str) or not data:
+            return None
+        media_type = str(source.get("media_type") or "image/jpeg").strip()
+        if not media_type.startswith("image/"):
+            media_type = "image/jpeg"
+        return f"data:{media_type};base64,{data}"
+
+    def _write_data_url_to_source(source: dict, data_url: str) -> None:
+        header, _, data = data_url.partition(",")
+        media_type = "image/jpeg"
+        if header.startswith("data:"):
+            candidate = header[len("data:"):].split(";", 1)[0].strip()
+            if candidate.startswith("image/"):
+                media_type = candidate
+        source["type"] = "base64"
+        source["media_type"] = media_type
+        source["data"] = data
+
     for msg in api_messages:
         if not isinstance(msg, dict):
             continue
@@ -974,6 +997,16 @@ def try_shrink_image_parts_in_messages(
             if not isinstance(part, dict):
                 continue
             ptype = part.get("type")
+            if ptype == "image":
+                source = part.get("source")
+                url = _source_to_data_url(source)
+                resized, unshrinkable = _shrink_data_url(url or "")
+                if resized and isinstance(source, dict):
+                    _write_data_url_to_source(source, resized)
+                    changed_count += 1
+                elif unshrinkable:
+                    unshrinkable_oversized += 1
+                continue
             if ptype not in {"image_url", "input_image"}:
                 continue
             image_value = part.get("image_url")

agent/conversation_loop.py

@@ -4050,6 +4050,19 @@ def run_conversation(
 
                 messages.append(assistant_msg)
                 agent._emit_interim_assistant_message(assistant_msg)
+                try:
+                    # Persist the assistant tool-call turn before any tool
+                    # side effects run. If a destructive tool restarts or
+                    # terminates Hermes mid-turn, resume logic still sees the
+                    # exact tool-call block that already executed.
+                    agent._flush_messages_to_session_db(messages, conversation_history)
+                except Exception as exc:
+                    logger.warning(
+                        "Incremental tool-call persistence failed before execution "
+                        "(session=%s): %s",
+                        agent.session_id or "none",
+                        exc,
+                    )
 
                 # Close any open streaming display (response box, reasoning
                 # box) before tool execution begins.  Intermediate turns may
@@ -4479,9 +4492,10 @@ def run_conversation(
                 final_msg = agent._build_assistant_message(assistant_message, finish_reason)
 
                 # Pop thinking-only prefill and empty-response retry
-                # scaffolding before appending the final response.  These
-                # internal turns are only for the next API retry and should
-                # not become durable transcript context.
+                # scaffolding before appending either a final response or a
+                # verification-stop follow-up. These internal turns are only
+                # for the next API retry and should not become durable
+                # transcript context.
                 while (
                     messages
                     and isinstance(messages[-1], dict)
@@ -4493,6 +4507,44 @@ def run_conversation(
                 ):
                     messages.pop()
 
+                try:
+                    from agent.verification_stop import (
+                        build_verify_on_stop_nudge,
+                        verify_on_stop_enabled,
+                    )
+
+                    if verify_on_stop_enabled():
+                        _verify_nudge = build_verify_on_stop_nudge(
+                            session_id=getattr(agent, "session_id", None),
+                            changed_paths=getattr(agent, "_turn_file_mutation_paths", set()),
+                            attempts=getattr(agent, "_verification_stop_nudges", 0),
+                        )
+                    else:
+                        _verify_nudge = None
+                except Exception:
+                    logger.debug("verification stop-loop check failed", exc_info=True)
+                    _verify_nudge = None
+
+                if _verify_nudge:
+                    agent._verification_stop_nudges = (
+                        getattr(agent, "_verification_stop_nudges", 0) + 1
+                    )
+                    final_msg["finish_reason"] = "verification_required"
+                    messages.append(final_msg)
+                    # Keep the attempted final answer in model history so the
+                    # synthetic user nudge preserves role alternation, but do
+                    # not surface it to the user as an interim answer. The
+                    # whole point of this guard is to prevent premature
+                    # "done" claims before checks run.
+                    messages.append({
+                        "role": "user",
+                        "content": _verify_nudge,
+                        "_verification_stop_synthetic": True,
+                    })
+                    agent._session_messages = messages
+                    agent._emit_status("↻ Verification required before finishing")
+                    continue
+
                 messages.append(final_msg)
                 
                 _turn_exit_reason = f"text_response(finish_reason={finish_reason})"

agent/learn_prompt.py

@@ -0,0 +1,109 @@
+#!/usr/bin/env python3
+"""``/learn`` — build the standards-guided prompt that turns whatever the user
+described into a reusable skill.
+
+``/learn`` is open-ended. The user can point it at anything they can describe:
+a directory of code, an API doc URL, a workflow they just walked the agent
+through in this conversation, or pasted notes. This module builds ONE prompt
+that instructs the live agent to:
+
+  1. Gather the sources the user named, using the tools it already has
+     (``read_file`` / ``search_files`` for dirs, ``web_extract`` for URLs, the
+     current conversation for "what I just did", the user's text for pasted
+     material).
+  2. Author a single ``SKILL.md`` via ``skill_manage`` that follows the Hermes
+     skill-authoring standards (description <=60 chars, the modern section
+     order, Hermes-tool framing, no invented commands).
+
+There is no separate distillation engine and no model-tool footprint: the
+agent does the work with its existing toolset, so this works identically on
+local, Docker, and remote terminal backends. Every surface (CLI ``/learn``,
+gateway ``/learn``, the dashboard "Learn a skill" panel) calls
+:func:`build_learn_prompt` and feeds the result to the agent as a normal turn.
+"""
+
+from __future__ import annotations
+
+# The house-style rules, distilled from AGENTS.md "Skill authoring standards
+# (HARDLINE)" and the hermes-agent-dev new-skill salvage reference. Embedded in
+# the prompt so the agent authors skills the way a maintainer would by hand.
+_AUTHORING_STANDARDS = """\
+Follow the Hermes skill-authoring standards exactly:
+
+Frontmatter:
+- name: lowercase-hyphenated, <=64 chars, no spaces.
+- description: ONE sentence, <=60 characters, ends with a period. State the
+  capability, not the implementation. No marketing words (powerful,
+  comprehensive, seamless, advanced). Do NOT repeat the skill name. If the
+  description contains a colon, wrap the whole value in double quotes.
+- version: 0.1.0
+- metadata.hermes.tags: a few Capitalized, Relevant, Tags.
+
+Body section order (omit a section only if it genuinely has no content):
+1. "# <Human Title>" then a 2-3 sentence intro: what it does, what it does NOT
+   do, and the key dependency stance (e.g. "stdlib only").
+2. "## When to Use" — bullet list of concrete trigger phrases.
+3. "## Prerequisites" — exact env vars, install steps, credentials.
+4. "## How to Run" — the canonical invocation, framed through Hermes tools.
+5. "## Quick Reference" — a flat command/endpoint list, no narration.
+6. "## Procedure" — numbered steps with copy-paste-exact commands.
+7. "## Pitfalls" — known limits, rate limits, things that look broken but aren't.
+8. "## Verification" — a single command/check that proves the skill worked.
+
+Hermes-tool framing (this is what makes it a skill, not shell docs):
+- Frame running scripts as "invoke through the `terminal` tool".
+- Use `read_file` (not cat/head/tail), `search_files` (not grep/find/ls),
+  `patch` (not sed/awk), `web_extract` (not curl-to-scrape),
+  `vision_analyze` for images. Reference these tools by name in backticks.
+- Do NOT name shell utilities the agent already has wrapped.
+
+Quality bar:
+- Prefer exact commands, endpoint URLs, function signatures, and config keys
+  that appear VERBATIM in the source. NEVER invent flags, paths, or APIs — if
+  you didn't see it in the source, don't write it.
+- Keep it tight and scannable: ~100 lines for a simple skill, ~200 for a
+  complex one. Don't re-paste the source docs.
+- Don't write a router/index/hub skill that only points at other skills.
+- Larger scripts/parsers belong in a `scripts/` file (add via
+  `skill_manage` write_file), referenced from SKILL.md by relative path — not
+  inlined for the agent to re-type every run."""
+
+
+def build_learn_prompt(user_request: str) -> str:
+    """Build the agent prompt for an open-ended ``/learn`` request.
+
+    Args:
+        user_request: the free-text the user gave after ``/learn`` — a
+            description of the workflow, paths, URLs, or "what I just did".
+
+    Returns:
+        A complete instruction the agent runs as a normal turn. The agent
+        gathers the described sources with its existing tools and authors the
+        skill via ``skill_manage``.
+    """
+    req = (user_request or "").strip()
+    if not req:
+        req = (
+            "the workflow we just went through in this conversation — review "
+            "the steps taken and distill them into a reusable skill"
+        )
+
+    return (
+        "[/learn] The user wants you to learn a reusable skill from the "
+        "source(s) they described below, and save it.\n\n"
+        f"WHAT TO LEARN FROM:\n{req}\n\n"
+        "Do this:\n"
+        "1. Gather the material. Resolve whatever the user named using the "
+        "tools you already have — `read_file`/`search_files` for local files "
+        "or directories, `web_extract` for URLs, the current conversation "
+        "history if they referred to something you just did, and the text "
+        "they pasted as-is. If the request is ambiguous about scope, make a "
+        "reasonable choice and note it; do not stall.\n"
+        "2. Author ONE SKILL.md and save it with the `skill_manage` tool "
+        "(action=\"create\"). Pick a sensible category. If the procedure needs "
+        "a non-trivial script, add it under the skill's `scripts/` with "
+        "`skill_manage` write_file and reference it by relative path.\n\n"
+        f"{_AUTHORING_STANDARDS}\n\n"
+        "When done, tell the user the skill name, its category, and a "
+        "one-line summary of what it captured."
+    )

agent/memory_manager.py

@@ -46,6 +46,39 @@ logger = logging.getLogger(__name__)
 _SYNC_DRAIN_TIMEOUT_S = 5.0
 
 
+def normalize_tool_schema(schema: Any) -> Optional[Dict[str, Any]]:
+    """Return a function-tool dict with a resolvable top-level ``name``.
+
+    Context engines and memory providers expose tool schemas via
+    ``get_tool_schemas()``. The expected shape is a bare function schema
+    (``{"name": ..., "description": ..., "parameters": ...}``) which callers
+    wrap as ``{"type": "function", "function": schema}``.
+
+    Some providers instead return an entry that is *already* in OpenAI tool
+    form (``{"type": "function", "function": {"name": ...}}``). Wrapping that
+    a second time produces ``{"type": "function", "function": {"type":
+    "function", "function": {...}}}`` whose ``function`` has no top-level
+    ``name``. Strict providers (e.g. DeepSeek) reject the *entire* request
+    with ``tools[N].function: missing field name`` (HTTP 400), so one bad
+    schema disables the whole toolset and breaks every turn (#47707).
+
+    This helper normalizes both shapes to the bare function schema and
+    returns ``None`` for anything without a resolvable name, so callers can
+    skip-with-warning rather than appending a nameless tool.
+    """
+    if not isinstance(schema, dict):
+        return None
+    # Unwrap an already-wrapped OpenAI tool entry.
+    if schema.get("type") == "function" and isinstance(schema.get("function"), dict):
+        schema = schema["function"]
+        if not isinstance(schema, dict):
+            return None
+    name = schema.get("name", "")
+    if not name or not isinstance(name, str):
+        return None
+    return schema
+
+
 def memory_provider_tools_enabled(enabled_toolsets: Optional[List[str]]) -> bool:
     """Return whether external memory-provider tools should be exposed."""
     if enabled_toolsets is None:
@@ -92,11 +125,17 @@ def inject_memory_provider_tools(agent: Any) -> int:
         agent.valid_tool_names = valid_tool_names
 
     added = 0
-    for schema in get_schemas():
-        if not isinstance(schema, dict):
+    for raw_schema in get_schemas():
+        schema = normalize_tool_schema(raw_schema)
+        if schema is None:
+            logger.warning(
+                "Memory provider returned a tool schema with no resolvable "
+                "name; skipping to avoid poisoning the request (%r)",
+                raw_schema,
+            )
             continue
-        tool_name = schema.get("name", "")
-        if not tool_name or tool_name in existing_tool_names:
+        tool_name = schema["name"]
+        if tool_name in existing_tool_names:
             continue
         tools.append({"type": "function", "function": schema})
         valid_tool_names.add(tool_name)
@@ -370,8 +409,11 @@ class MemoryManager:
         _core_tool_names = set(_HERMES_CORE_TOOLS)
 
         # Index tool names → provider for routing
-        for schema in provider.get_tool_schemas():
-            tool_name = schema.get("name", "")
+        for raw_schema in provider.get_tool_schemas():
+            schema = normalize_tool_schema(raw_schema)
+            if schema is None:
+                continue
+            tool_name = schema["name"]
             if tool_name in _core_tool_names:
                 logger.warning(
                     "Memory provider '%s' tool '%s' shadows a reserved core "
@@ -658,11 +700,19 @@ class MemoryManager:
         seen = set()
         for provider in self._providers:
             try:
-                for schema in provider.get_tool_schemas():
-                    name = schema.get("name", "")
+                for raw_schema in provider.get_tool_schemas():
+                    schema = normalize_tool_schema(raw_schema)
+                    if schema is None:
+                        logger.warning(
+                            "Memory provider '%s' returned a tool schema with "
+                            "no resolvable name; skipping (%r)",
+                            provider.name, raw_schema,
+                        )
+                        continue
+                    name = schema["name"]
                     if name in _core_tool_names:
                         continue
-                    if name and name not in seen:
+                    if name not in seen:
                         schemas.append(schema)
                         seen.add(name)
             except Exception as e:

agent/oneshot.py

@@ -0,0 +1,158 @@
+"""Shared one-off LLM requests for non-conversational helpers.
+
+A "one-shot" is a single, stateless model call that runs *outside* any
+conversation: it never touches a session's history, never breaks prompt
+caching, and returns plain text. UI surfaces use it for small generative
+chores — a commit message from a diff, a rename suggestion, a summary —
+where spinning up an agent turn would be wrong (it would pollute the thread)
+and hand-rolling an LLM call at every call site would be worse.
+
+Two ways to call it:
+
+  * ``run_oneshot(instructions=..., user_input=...)`` — caller supplies the
+    full prompt.
+  * ``run_oneshot(template="commit_message", variables={...})`` — caller
+    names a registered template and passes its variables; the template owns
+    the prompt engineering so it stays consistent across CLI/TUI/desktop.
+
+Model selection rides the same auxiliary plumbing as title generation
+(:func:`agent.auxiliary_client.call_llm`): pass ``main_runtime`` to inherit
+the live session's provider/model, otherwise the configured ``task`` (default
+``title_generation``) resolves a cheap/fast backend.
+"""
+
+import logging
+from typing import Any, Callable, Dict, Optional, Tuple
+
+from agent.auxiliary_client import call_llm, extract_content_or_reasoning
+
+logger = logging.getLogger(__name__)
+
+# A template turns a variables dict into a (instructions, user_input) pair.
+# Templates are plain callables (not str.format) so diff/code payloads with
+# literal "{" / "}" pass through untouched.
+PromptTemplate = Callable[[Dict[str, Any]], Tuple[str, str]]
+
+
+def _truncate(text: str, limit: int) -> str:
+    text = text or ""
+    if len(text) <= limit:
+        return text
+    return text[:limit].rstrip() + "\n…(truncated)"
+
+
+_COMMIT_INSTRUCTIONS = (
+    "You write git commit messages. Given a diff of staged changes, write ONE "
+    "concise Conventional Commits message describing what the change does and why.\n"
+    "Rules:\n"
+    "- Subject line: type(scope): summary — imperative mood, lower-case, no "
+    "trailing period, ≤ 72 characters. Types: feat, fix, refactor, perf, docs, "
+    "test, build, chore, style, ci.\n"
+    "- Omit the scope if it isn't obvious.\n"
+    "- Add a short body (wrapped at ~72 cols) ONLY when the change needs "
+    "explanation; skip it for small/obvious changes.\n"
+    "- Describe the actual change, never restate the diff line-by-line.\n"
+    "- Return ONLY the commit message text — no quotes, no markdown fences, no "
+    "preamble."
+)
+
+
+def _commit_message_template(variables: Dict[str, Any]) -> Tuple[str, str]:
+    diff = _truncate(str(variables.get("diff") or ""), 12000)
+    recent = _truncate(str(variables.get("recent_commits") or ""), 1500)
+
+    parts = []
+    if recent.strip():
+        parts.append(
+            "Recent commit subjects from this repo (match their style/conventions):\n"
+            f"{recent}"
+        )
+    parts.append("Diff to describe:\n" + (diff or "(no textual diff available)"))
+
+    # "Regenerate" must yield something new even on models that decode greedily
+    # / pin temperature server-side. A trailing nonce isn't enough, so we hand
+    # back the previous message and require a genuinely different one.
+    avoid = _truncate(str(variables.get("avoid") or "").strip(), 1000)
+    if avoid:
+        parts.append(
+            "You already proposed the message below and the user wants a "
+            "different one. Write a NEW message with different wording (and, if "
+            "reasonable, a different emphasis or scope framing) — do not repeat "
+            f"it:\n{avoid}"
+        )
+
+    return _COMMIT_INSTRUCTIONS, "\n\n".join(parts)
+
+
+# Registry of named templates. Add an entry here to give a new surface a
+# consistent, reusable prompt without teaching every caller the prompt text.
+PROMPT_TEMPLATES: Dict[str, PromptTemplate] = {
+    "commit_message": _commit_message_template,
+}
+
+
+def render_template(name: str, variables: Optional[Dict[str, Any]] = None) -> Tuple[str, str]:
+    """Resolve a registered template into (instructions, user_input).
+
+    Raises KeyError if the template name is unknown so callers fail loudly
+    instead of silently sending an empty prompt.
+    """
+    template = PROMPT_TEMPLATES.get(name)
+    if template is None:
+        raise KeyError(f"unknown one-shot template: {name}")
+    return template(variables or {})
+
+
+def run_oneshot(
+    *,
+    instructions: str = "",
+    user_input: str = "",
+    template: Optional[str] = None,
+    variables: Optional[Dict[str, Any]] = None,
+    task: str = "title_generation",
+    max_tokens: int = 1024,
+    temperature: Optional[float] = 0.3,
+    timeout: float = 60.0,
+    main_runtime: Optional[Dict[str, Any]] = None,
+) -> str:
+    """Run a single stateless LLM request and return its text.
+
+    Provide either a registered ``template`` (+ ``variables``) or an explicit
+    ``instructions`` / ``user_input`` pair. Returns the model's text answer,
+    stripped of surrounding whitespace and any wrapping code fence.
+
+    Raises RuntimeError when no LLM provider is configured (surfaced from
+    :func:`call_llm`) and KeyError for an unknown template name.
+    """
+    if template:
+        instructions, user_input = render_template(template, variables)
+
+    if not (instructions or "").strip() and not (user_input or "").strip():
+        raise ValueError("run_oneshot requires a template or instructions/user_input")
+
+    messages = []
+    if (instructions or "").strip():
+        messages.append({"role": "system", "content": instructions})
+    messages.append({"role": "user", "content": user_input or ""})
+
+    response = call_llm(
+        task=task,
+        messages=messages,
+        max_tokens=max_tokens,
+        temperature=temperature,
+        timeout=timeout,
+        main_runtime=main_runtime,
+    )
+
+    text = (extract_content_or_reasoning(response) or "").strip()
+    return _strip_code_fence(text)
+
+
+def _strip_code_fence(text: str) -> str:
+    """Drop a single wrapping ``` fence the model may have added."""
+    if not text.startswith("```"):
+        return text
+    lines = text.splitlines()
+    if len(lines) >= 2 and lines[0].startswith("```") and lines[-1].strip() == "```":
+        return "\n".join(lines[1:-1]).strip()
+    return text

agent/pet/__init__.py

@@ -0,0 +1,51 @@
+"""Petdex pet engine — shared core for the CLI, TUI, and desktop surfaces.
+
+Petdex (https://github.com/crafter-station/petdex) is a public gallery of
+animated sprite "pets" for coding agents.  Each pet is a ``pet.json`` plus a
+``spritesheet.{webp,png}`` of 192×208 px cells. Current Codex/petdex sheets use
+an 8-column × 9-row atlas; older Hermes/petdex sheets used an 8-row atlas.
+Hermes infers the row taxonomy from the sheet and maps agent activity onto
+idle/run/review/failed/wave/jump.
+
+This package is the **single source of truth** for the feature so the base
+CLI (Python) and TUI (Ink, via ``tui_gateway``) never duplicate the hard
+parts:
+
+- :mod:`agent.pet.constants` — frame geometry + the :class:`PetState` enum.
+- :mod:`agent.pet.state`     — map agent activity → a :class:`PetState`.
+- :mod:`agent.pet.manifest`  — fetch the public petdex manifest.
+- :mod:`agent.pet.store`     — install / list / resolve pets on disk
+                               (profile-aware via ``get_hermes_home()``).
+- :mod:`agent.pet.render`    — decode a spritesheet and encode frames for a
+                               terminal (kitty / iTerm2 / sixel graphics
+                               protocols, with a Unicode half-block
+                               fallback).
+
+Rendering in the Electron desktop is necessarily TypeScript (canvas), but it
+reuses the same on-disk store and the same state semantics.
+
+The whole feature is a *display* concern: it adds no model tool, mutates no
+system prompt or toolset, and therefore has zero effect on prompt caching.
+"""
+
+from agent.pet.constants import (
+    DEFAULT_SCALE,
+    FRAME_H,
+    FRAME_W,
+    FRAMES_PER_STATE,
+    LOOP_MS,
+    STATE_ROWS,
+    PetState,
+)
+from agent.pet.state import derive_pet_state
+
+__all__ = [
+    "DEFAULT_SCALE",
+    "FRAME_H",
+    "FRAME_W",
+    "FRAMES_PER_STATE",
+    "LOOP_MS",
+    "STATE_ROWS",
+    "PetState",
+    "derive_pet_state",
+]

agent/pet/constants.py

@@ -0,0 +1,167 @@
+"""Pet sprite geometry + animation-state taxonomy.
+
+These values are the common petdex/Codex pet geometry. The real ``pet.json``
+usually only carries ``id``/``displayName``/``description``/``spritesheetPath``;
+row taxonomy is inferred from the atlas shape so Hermes can render both legacy
+8-row sheets and current 9-row Codex sheets.
+"""
+
+from __future__ import annotations
+
+from enum import Enum
+
+# Frame geometry (pixels). Current Codex/petdex spritesheets are 8 columns x 9
+# rows (1536x1872), while older Hermes/petdex sheets used 9 columns x 8 rows
+# (1728x1664). Renderers derive both row taxonomy and real column count from the
+# concrete sheet, so either shape works.
+FRAME_W = 192
+FRAME_H = 208
+
+# Frames consumed per animation state (the petdex web app uses CSS
+# ``steps(6)``).  A sheet may physically contain more columns; we only step
+# through the first ``FRAMES_PER_STATE``.
+FRAMES_PER_STATE = 6
+
+# Full-loop duration for one state, milliseconds (petdex default).
+LOOP_MS = 1100
+
+# Default on-screen scale relative to native frame size.  ``display.pet.scale``
+# is the single master scalar: the desktop canvas multiplies its native pixels
+# by it and every terminal surface derives its half-block/kitty column width
+# from it (see :func:`cols_for_scale`), so one number shrinks all three
+# interfaces together.  (petdex's own clients render at 0.7; we default smaller
+# so the kitty/GUI mascot stays a glanceable corner sprite.  The half-block
+# fallback can't shrink as far — see ``UNICODE_MIN_COLS`` — and clamps to its
+# legibility floor instead.)
+DEFAULT_SCALE = 0.33
+
+# User-settable scale bounds (``/pet scale``, desktop slider).  Floor keeps the
+# pet clickable/visible; ceiling stops a fat-fingered value from filling the
+# screen.  The unicode fallback additionally clamps to ``UNICODE_MIN_COLS``.
+MIN_SCALE = 0.1
+MAX_SCALE = 3.0
+
+
+def clamp_scale(scale: float) -> float:
+    """Clamp *scale* to ``[MIN_SCALE, MAX_SCALE]`` (the single validation point)."""
+    return max(MIN_SCALE, min(MAX_SCALE, scale))
+
+# Terminal cells one native frame spans at ``scale == 1.0``.  A cell is ~8px
+# wide, a frame is ``FRAME_W`` (192) px → 24 cells.  This mirrors the kitty
+# graphics placement (``scaled_px // 8``) so at full scale every renderer agrees.
+BASE_UNICODE_COLS = FRAME_W // 8
+
+# Legibility floor for the half-block fallback.  A half-block cell samples the
+# sprite at only 1 horizontal + 2 vertical taps, so below this width a 192×208
+# pet collapses into an unreadable blob *regardless* of scale.  kitty/GUI draw
+# true pixels and have no such floor — that's why the same ``scale: 0.33`` is
+# crisp there but mush in half-blocks.  ``scale`` shrinks the unicode pet down
+# TO this floor (and grows it above), instead of past it into noise.
+UNICODE_MIN_COLS = 16
+
+
+def cols_for_scale(scale: float) -> int:
+    """Half-block width implied by *scale*, clamped to the legibility floor.
+
+    Above the floor it tracks the kitty cell box (``scaled_px // 8``) so the two
+    renderers converge at larger sizes; below it the floor keeps the sprite
+    readable rather than letting it devolve into a blob.
+    """
+    return max(UNICODE_MIN_COLS, round(BASE_UNICODE_COLS * (scale or DEFAULT_SCALE)))
+
+
+def resolve_cols(scale: float, unicode_cols: int = 0) -> int:
+    """Resolve terminal width: explicit *unicode_cols* override, else from *scale*."""
+    return int(unicode_cols) if unicode_cols and int(unicode_cols) > 0 else cols_for_scale(scale)
+
+
+class PetState(str, Enum):
+    """Animation state a pet can be shown in.
+
+    These are Hermes' activity state names. They are not always identical to the
+    source atlas row names: Codex-format pets use rows like ``jumping`` /
+    ``running`` while the UI keeps the shorter ``jump`` / ``run`` names.
+    """
+
+    IDLE = "idle"
+    WAVE = "wave"
+    RUN = "run"
+    FAILED = "failed"
+    REVIEW = "review"
+    JUMP = "jump"
+    WAITING = "waiting"
+
+
+# Legacy Hermes/petdex row order (top -> bottom) used by the older 8-row,
+# 9-column atlas shape.
+LEGACY_STATE_ROWS: list[str] = [
+    PetState.IDLE.value,
+    PetState.WAVE.value,
+    PetState.RUN.value,
+    PetState.FAILED.value,
+    PetState.REVIEW.value,
+    PetState.JUMP.value,
+    "extra1",
+    "extra2",
+]
+
+# Current Petdex row order (top -> bottom) used by 1536x1872 atlases:
+# 8 columns x 9 rows of 192x208 cells.
+CODEX_STATE_ROWS: list[str] = [
+    PetState.IDLE.value,
+    "running-right",
+    "running-left",
+    "waving",
+    "jumping",
+    PetState.FAILED.value,
+    PetState.WAITING.value,
+    "running",
+    PetState.REVIEW.value,
+]
+
+# Default/fallback for callers without a sheet. Prefer the current 9-row Codex
+# format because generated pets and the public Codex pet contract use it.
+STATE_ROWS: list[str] = CODEX_STATE_ROWS
+
+# Canonical Hermes activity names -> accepted row-name aliases in descending
+# preference. This keeps our internal state names stable (`wave`/`jump`/`run`)
+# while matching Petdex's current `waving`/`jumping`/`running` taxonomy.
+STATE_ALIASES: dict[str, tuple[str, ...]] = {
+    PetState.IDLE.value: (PetState.IDLE.value,),
+    PetState.WAVE.value: (PetState.WAVE.value, "waving"),
+    PetState.JUMP.value: (PetState.JUMP.value, "jumping"),
+    PetState.RUN.value: (PetState.RUN.value, "running"),
+    PetState.FAILED.value: (PetState.FAILED.value,),
+    PetState.REVIEW.value: (PetState.REVIEW.value,),
+    PetState.WAITING.value: (PetState.WAITING.value,),
+}
+
+
+def state_aliases_for(state: "PetState | str") -> tuple[str, ...]:
+    """Return accepted row-name aliases for *state* (always non-empty)."""
+    value = state.value if isinstance(state, PetState) else str(state)
+    aliases = STATE_ALIASES.get(value)
+    return aliases if aliases else (value,)
+
+
+def state_rows_for_grid(row_count: int | None) -> list[str]:
+    """Return the row taxonomy for a spritesheet with *row_count* rows."""
+    try:
+        rows = int(row_count or 0)
+    except (TypeError, ValueError):
+        rows = 0
+
+    if rows >= len(CODEX_STATE_ROWS):
+        return CODEX_STATE_ROWS
+    return LEGACY_STATE_ROWS
+
+
+def state_row_index(state: "PetState | str", row_count: int | None = None) -> int:
+    """Return the spritesheet row index for *state* (clamped, never raises)."""
+    rows = state_rows_for_grid(row_count)
+    for name in state_aliases_for(state):
+        try:
+            return rows.index(name)
+        except ValueError:
+            continue
+    return 0  # fall back to the idle row

agent/pet/generate/__init__.py

@@ -0,0 +1,29 @@
+"""Pet generation — base-draft → hatch pipeline.
+
+Public surface used by the gateway RPCs, the CLI ``hermes pets generate``
+command, and tests:
+
+- :func:`generate_base_drafts` / :func:`hatch_pet` — the two-step flow.
+- :class:`HatchResult`, :class:`GenerationError`.
+- :mod:`atlas` — deterministic frame extraction + atlas composition/validation.
+
+Image generation is delegated to the active reference-capable
+:class:`~agent.image_gen_provider.ImageGenProvider` (OpenAI gpt-image-2 or Krea);
+atlas assembly is fully deterministic so it's testable without any API calls.
+"""
+
+from __future__ import annotations
+
+from agent.pet.generate.imagegen import GenerationError
+from agent.pet.generate.orchestrate import (
+    HatchResult,
+    generate_base_drafts,
+    hatch_pet,
+)
+
+__all__ = [
+    "GenerationError",
+    "HatchResult",
+    "generate_base_drafts",
+    "hatch_pet",
+]

agent/pet/generate/imagegen.py

@@ -0,0 +1,251 @@
+"""Thin image-generation layer for pet sprites.
+
+Wraps the active :class:`~agent.image_gen_provider.ImageGenProvider` with the
+two things sprite generation needs that the agent-facing ``image_generate`` tool
+doesn't expose: **N variants** (loop) and **reference-image grounding** (so each
+animation row stays the same character as the chosen base).
+
+Reference grounding only works on providers that support it — currently OpenAI
+``gpt-image-2`` (image edits) and Krea (style references). We resolve to one of
+those and surface a clear, actionable error otherwise rather than silently
+producing an ungrounded, drifting pet.
+"""
+
+from __future__ import annotations
+
+import logging
+import os
+from dataclasses import dataclass
+from pathlib import Path
+
+logger = logging.getLogger(__name__)
+
+# Providers that can ground generation on a reference image, in preference order
+# (Nous Portal → OpenAI → OpenRouter → …). OpenRouter/Nous run a quality-first
+# model chain and may fall back depending on account access and endpoint behavior,
+# so fidelity can vary by configured backend + model availability.
+_REF_CAPABLE = ("nous", "openai", "openai-codex", "openrouter", "krea")
+
+# Friendly display label per reference-capable provider, surfaced in the desktop
+# pet-gen picker.
+_PROVIDER_LABELS: dict[str, str] = {
+    "nous": "Nous Portal",
+    "openrouter": "OpenRouter",
+    "openai": "OpenAI",
+    "openai-codex": "OpenAI (Codex)",
+    "krea": "Krea",
+}
+
+
+def _forced_provider_from_env() -> str | None:
+    """Optional QA override to force a pet-gen backend.
+
+    `HERMES_PET_IMAGE_PROVIDER=<name>` (e.g. `openrouter`) bypasses the normal
+    active/default provider resolution for pet generation only. Unknown values are
+    ignored so existing users are unaffected.
+    """
+    forced = os.environ.get("HERMES_PET_IMAGE_PROVIDER", "").strip().lower()
+    return forced if forced in _REF_CAPABLE else None
+
+
+class GenerationError(RuntimeError):
+    """Raised on any image-generation failure (no provider, API error, IO)."""
+
+
+@dataclass(frozen=True)
+class SpriteProvider:
+    """Resolved provider plus whether it can take reference images."""
+
+    name: str
+    provider: object
+    supports_references: bool
+
+
+def _discover() -> None:
+    try:
+        from hermes_cli.plugins import _ensure_plugins_discovered
+
+        _ensure_plugins_discovered()
+    except Exception as exc:  # noqa: BLE001 - discovery is best-effort
+        logger.debug("image-gen plugin discovery failed: %s", exc)
+
+
+def resolve_provider(*, require_references: bool = True, prefer: str | None = None) -> SpriteProvider:
+    """Pick the image provider to use for sprite work.
+
+    Preference: an explicit *prefer* choice (the desktop pet-gen picker) when it's
+    reference-capable and configured, then the configured/active provider when
+    it's reference-capable, else the first available reference-capable provider.
+    With *require_references* off we fall back to any available provider (used for
+    prompt-only base drafts).
+    """
+    _discover()
+    from agent.image_gen_registry import get_active_provider, get_provider
+
+    # QA override: force one provider for pet-gen iteration regardless of the
+    # globally active image_gen backend.
+    forced = _forced_provider_from_env()
+    if forced:
+        chosen = get_provider(forced)
+        if chosen is not None and chosen.is_available():
+            return SpriteProvider(name=forced, provider=chosen, supports_references=True)
+
+    # An explicit user pick wins when it's reference-capable and has credentials;
+    # otherwise we ignore it and fall through to the normal resolution.
+    if prefer:
+        chosen = get_provider(prefer)
+        if prefer in _REF_CAPABLE and chosen is not None and chosen.is_available():
+            return SpriteProvider(name=prefer, provider=chosen, supports_references=True)
+
+    # Configured / active provider first.
+    active = None
+    try:
+        active = get_active_provider()
+    except Exception:  # noqa: BLE001
+        active = None
+    if active is not None:
+        name = getattr(active, "name", "")
+        if name in _REF_CAPABLE and active.is_available():
+            return SpriteProvider(name=name, provider=active, supports_references=True)
+
+    # Any available reference-capable provider.
+    for name in _REF_CAPABLE:
+        provider = get_provider(name)
+        if provider is not None and provider.is_available():
+            return SpriteProvider(name=name, provider=provider, supports_references=True)
+
+    if not require_references and active is not None and active.is_available():
+        return SpriteProvider(
+            name=getattr(active, "name", "unknown"), provider=active, supports_references=False
+        )
+
+    raise GenerationError(
+        "Pet generation needs an image backend that supports reference images. "
+        "Open `hermes tools` → Image Generation and configure Nous Portal, "
+        "OpenRouter, or OpenAI (gpt-image-2) with an API key."
+    )
+
+
+def list_sprite_providers() -> list[dict]:
+    """The reference-capable providers available to pick for pet generation.
+
+    Returns ``[{name, label, default}]`` for every ref-capable provider the user
+    actually has credentials for, in preference order, marking the one
+    :func:`resolve_provider` would choose with no explicit preference. Empty when
+    none is configured (the picker hides itself). Best-effort: discovery hiccups
+    yield an empty list.
+    """
+    _discover()
+    from agent.image_gen_registry import get_provider
+
+    try:
+        default_name = resolve_provider(require_references=True).name
+    except GenerationError:
+        default_name = ""
+
+    out: list[dict] = []
+    for name in _REF_CAPABLE:
+        provider = get_provider(name)
+        if provider is None or not provider.is_available():
+            continue
+        out.append(
+            {
+                "name": name,
+                "label": _PROVIDER_LABELS.get(name, name),
+                "default": name == default_name,
+            }
+        )
+    return out
+
+
+def _save_local(image_ref: str, *, prefix: str) -> Path:
+    """Return a local path for *image_ref*, downloading it if it's a URL."""
+    if image_ref.startswith(("http://", "https://")):
+        from agent.image_gen_provider import save_url_image
+
+        return Path(save_url_image(image_ref, prefix=prefix))
+    return Path(image_ref)
+
+
+def _rejected_background(error: str) -> bool:
+    """True when a provider error is specifically about the ``background`` param.
+
+    Transparent backgrounds are a per-model capability (e.g. some gpt-image tiers
+    reject ``background=transparent`` outright). We detect that one rejection so
+    we can retry without the flag rather than failing the whole pet — our chroma
+    key pass makes the result transparent regardless.
+    """
+    lowered = (error or "").lower()
+    return "background" in lowered and ("not supported" in lowered or "transparent" in lowered)
+
+
+def generate(
+    prompt: str,
+    *,
+    n: int = 1,
+    reference_images: list[Path] | None = None,
+    provider: SpriteProvider | None = None,
+    prefix: str = "pet_gen",
+    aspect_ratio: str = "square",
+) -> list[Path]:
+    """Generate *n* sprite images and return their local paths.
+
+    *reference_images* grounds the output on a base image (required for rows).
+    *aspect_ratio* picks the canvas: ``"square"`` for single-character base
+    drafts, ``"landscape"`` for multi-frame row strips (the wider 1536px canvas
+    gives every frame real horizontal room so winged poses don't have to be
+    shrunk to avoid touching their neighbors).
+    We *ask* for a transparent background, but fall back to an opaque generation
+    (cleaned up downstream by the chroma-key pass) on models that reject the
+    flag. Raises :class:`GenerationError` if nothing usable comes back.
+    """
+    sprite = provider or resolve_provider(require_references=bool(reference_images))
+    if reference_images and not sprite.supports_references:
+        raise GenerationError(
+            f"image backend '{sprite.name}' cannot use reference images; "
+            "configure OpenAI gpt-image-2 or Krea for pet generation"
+        )
+
+    refs = [str(p) for p in (reference_images or [])]
+
+    def _run(extra: dict) -> tuple[Path | None, str]:
+        kwargs: dict = {"aspect_ratio": aspect_ratio, **extra}
+        if refs:
+            # Providers disagree on the ref kwarg name: our OpenRouter/Nous
+            # backends read ``reference_images``, OpenAI's gpt-image-2 reads
+            # ``reference_image_urls``. Send both; each ignores the other.
+            kwargs["reference_images"] = refs
+            kwargs["reference_image_urls"] = refs
+        try:
+            result = sprite.provider.generate(prompt, **kwargs)
+        except Exception as exc:  # noqa: BLE001 - normalize provider crashes
+            logger.debug("provider.generate crashed: %s", exc)
+            return None, str(exc)
+        if not isinstance(result, dict) or not result.get("success"):
+            return None, (result or {}).get("error", "unknown error") if isinstance(result, dict) else "no result"
+        image_ref = result.get("image")
+        if not image_ref:
+            return None, "provider returned no image"
+        try:
+            return _save_local(str(image_ref), prefix=prefix), ""
+        except Exception as exc:  # noqa: BLE001
+            return None, f"could not save generated image: {exc}"
+
+    out: list[Path] = []
+    last_error = ""
+    allow_transparent = True
+    for _ in range(max(1, n)):
+        path, err = _run({"background": "transparent"} if allow_transparent else {})
+        # Model doesn't support the transparent flag → drop it for this and every
+        # remaining variant (no point re-probing a capability we just disproved).
+        if path is None and allow_transparent and _rejected_background(err):
+            allow_transparent = False
+            path, err = _run({})
+        if path is not None:
+            out.append(path)
+        else:
+            last_error = err
+
+    if not out:
+        raise GenerationError(last_error or "image generation produced no output")
+    return out

agent/pet/generate/orchestrate.py

@@ -0,0 +1,358 @@
+"""Pet generation orchestration — the base-draft → hatch flow.
+
+Two steps, mirroring the UX across every surface:
+
+1. :func:`generate_base_drafts` — a handful of prompt-only "what should this pet
+   look like" variants. Cheap; the user picks one (or retries for a fresh set).
+2. :func:`hatch_pet` — takes the chosen base and generates one grounded row
+   strip per Hermes state, slices each into frames, composes the atlas, validates
+   it, and writes the pet into the store.
+
+Splitting it this way bounds cost (4 cheap base calls per round; the ~6 row
+calls happen once, on the pet you actually keep) and gives each UI a natural
+preview/loading point.
+"""
+
+from __future__ import annotations
+
+import logging
+import time
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Callable
+
+from agent.pet.generate import atlas, imagegen, prompts
+from agent.pet.generate.imagegen import GenerationError, SpriteProvider
+
+logger = logging.getLogger(__name__)
+
+# (event, detail) — e.g. ("row", "idle"), ("compose", ""), ("save", "<slug>").
+ProgressFn = Callable[[str, str], None]
+
+# Image generations are independent network calls, so we fan them out instead of
+# blocking on each in turn — a hatch is ~8 row calls that would otherwise run
+# back-to-back and routinely blow past the client's RPC timeout. Capped so we
+# don't hammer the provider's rate limit (one cold call can still be slow).
+_MAX_PARALLEL_GENERATIONS = 4
+# How many times to (re)generate a single row before accepting a best-effort
+# slice. Early attempts demand clean per-pose gutters; the last is lenient so a
+# stubborn row still yields frames instead of dropping out entirely.
+_ROW_GEN_ATTEMPTS = 3
+_MIN_FILLED_STATES = 6
+_REQUIRED_STATES = frozenset({"idle", "running-right", "waving"})
+
+
+@dataclass(frozen=True)
+class HatchResult:
+    """Outcome of a successful :func:`hatch_pet`."""
+
+    slug: str
+    display_name: str
+    spritesheet: Path
+    states: list[str]
+    validation: dict
+
+
+def _harden_transparency(path: Path) -> Path:
+    """Key out any solid backdrop the provider painted; save as an RGBA PNG.
+
+    ``background=transparent`` is requested on every call, but image models honor
+    it inconsistently — some still paint a flat (often near-white) backdrop. We
+    run the same chroma-key pass the row extractor uses so every base draft the
+    user picks between (and the reference the rows are grounded on) is a clean
+    cutout. Best-effort: a decode failure leaves the original untouched.
+    """
+    from PIL import Image
+
+    try:
+        with Image.open(path) as opened:
+            keyed = atlas.remove_background(opened.convert("RGBA"))
+        # Zero the RGB of any leftover semi-transparent edge pixels so a keyed
+        # draft has no colored halo when composited on the dark UI.
+        keyed = atlas._clear_transparent_rgb(keyed)
+        out = path.with_suffix(".png")
+        keyed.save(out, format="PNG")
+        return out
+    except Exception as exc:  # noqa: BLE001 - cosmetic; fall back to the raw image
+        logger.debug("base draft transparency hardening failed for %s: %s", path, exc)
+        return path
+
+
+def generate_base_drafts(
+    concept: str,
+    *,
+    n: int = 4,
+    style: str = "auto",
+    reference_images: list[Path] | None = None,
+    provider: SpriteProvider | None = None,
+    on_draft: Callable[[int, Path], None] | None = None,
+    is_cancelled: Callable[[], bool] | None = None,
+) -> list[Path]:
+    """Generate *n* candidate base looks for *concept*; returns image paths.
+
+    Each draft is hardened to a transparent cutout (see :func:`_harden_transparency`).
+    Drafts are generated concurrently and *on_draft(index, path)* fires as each
+    one finishes (not at the end) so callers can stream previews to the UI
+    instead of leaving it blank until the whole batch is done.
+
+    *is_cancelled*, when supplied, is polled cooperatively: a draft that hasn't
+    started yet is skipped, and once it trips we stop staging/streaming further
+    drafts and cancel any queued work (already-in-flight provider calls can't be
+    hard-killed, but their results are dropped).
+    """
+    # A user reference image (e.g. their own pet) grounds every draft, so it
+    # needs a reference-capable provider — same requirement as the row passes.
+    refs = reference_images or None
+    sprite = provider or imagegen.resolve_provider(require_references=bool(refs))
+    cancelled = is_cancelled or (lambda: False)
+
+    # Each draft is its own one-shot generation, run concurrently so the user
+    # waits for one image, not N. A single draft failing must not sink the set.
+    # Each gets a distinct variation nudge so the options aren't near-duplicates.
+    logger.info("pet generate: drafting %d base looks for %r (style=%s)", n, concept, style)
+
+    def _one(index: int) -> tuple[int, Path | None, str | None]:
+        if cancelled():
+            return index, None, None
+        t0 = time.monotonic()
+        variation = prompts.BASE_VARIATIONS[index % len(prompts.BASE_VARIATIONS)]
+        prompt = prompts.build_base_prompt(concept, style=style, variation=variation)
+        try:
+            out = imagegen.generate(prompt, n=1, reference_images=refs, provider=sprite, prefix="pet_base")
+        except Exception as exc:  # noqa: BLE001 - tolerate a single failed draft
+            logger.warning("pet generate: draft %d failed after %.1fs: %s", index, time.monotonic() - t0, exc)
+            return index, None, str(exc)
+        if not out:
+            logger.warning("pet generate: draft %d produced no image", index)
+            return index, None, "the image provider returned no image"
+        logger.info("pet generate: draft %d ready in %.1fs", index, time.monotonic() - t0)
+        return index, _harden_transparency(out[0]), None
+
+    workers = max(1, min(n, _MAX_PARALLEL_GENERATIONS))
+    results: dict[int, Path] = {}
+    errors: list[str] = []
+    with ThreadPoolExecutor(max_workers=workers) as pool:
+        futures = [pool.submit(_one, i) for i in range(n)]
+        # as_completed runs in *this* (the caller's) thread, so on_draft — and any
+        # gateway event it emits — inherits the request's bound transport, unlike
+        # the worker threads above.
+        for fut in as_completed(futures):
+            if cancelled():
+                logger.info("pet generate: cancelled — dropping remaining drafts")
+                for pending in futures:
+                    pending.cancel()
+                break
+            index, path, err = fut.result()
+            if path is None:
+                if err:
+                    errors.append(err)
+                continue
+            results[index] = path
+            if on_draft is not None:
+                try:
+                    on_draft(index, path)
+                except Exception as exc:  # noqa: BLE001 - progress is best-effort
+                    logger.debug("on_draft callback failed: %s", exc)
+
+    drafts = [results[i] for i in sorted(results)]
+    if not drafts and not cancelled():
+        # Surface *why* — every draft failed for a reason (a content-policy refusal
+        # on a name like "minion", a provider/auth error, …); the most common one
+        # is the representative cause. Far more useful than "no usable drafts".
+        raise GenerationError(_drafts_failed_reason(errors))
+    return drafts
+
+
+def _drafts_failed_reason(errors: list[str]) -> str:
+    """The representative reason a draft round produced nothing, humanized."""
+    if not errors:
+        return "image generation produced no usable drafts"
+    from collections import Counter
+
+    return _humanize_image_error(Counter(errors).most_common(1)[0][0])
+
+
+def _humanize_image_error(error: str) -> str:
+    """Turn a raw provider error into a friendly, actionable sentence.
+
+    The big one is moderation: image models refuse trademarked characters and
+    real people (e.g. "minion"), which reads as an opaque 400 otherwise.
+    """
+    low = error.lower()
+    if any(s in low for s in ("moderation_blocked", "safety system", "content policy", "content_policy")):
+        return (
+            "The image provider blocked this prompt — its safety filter rejects "
+            "trademarked characters and real people. Try an original description."
+        )
+    if any(s in low for s in ("api key", "unauthorized", "401", "auth")):
+        return "The image provider rejected the request — check your API key in Settings → Providers."
+    if "rate limit" in low or "429" in low:
+        return "The image provider is rate-limiting — wait a moment and try again."
+    # Otherwise the first line, trimmed of the noisy provider envelope.
+    return error.splitlines()[0].strip()[:200]
+
+
+def hatch_pet(
+    *,
+    base_image: str | Path,
+    slug: str,
+    display_name: str = "",
+    description: str = "",
+    concept: str = "",
+    style: str = "auto",
+    on_progress: ProgressFn | None = None,
+    provider: SpriteProvider | None = None,
+    is_cancelled: Callable[[], bool] | None = None,
+) -> HatchResult:
+    """Turn an approved base image into a full, installed Hermes pet.
+
+    Generates a grounded row strip per state, extracts frames, composes +
+    validates the atlas, and registers it. The idle row falls back to the base
+    look so the pet always renders. Raises :class:`GenerationError` on failure.
+
+    *is_cancelled*, when supplied, is polled cooperatively: rows that haven't
+    started are skipped, queued rows are cancelled, and once every row is done we
+    abort (raising :class:`GenerationError`) before composing/saving so a stopped
+    hatch never writes a half-built pet.
+    """
+    base = Path(base_image)
+    if not base.is_file():
+        raise GenerationError(f"base image not found: {base}")
+
+    sprite = provider or imagegen.resolve_provider(require_references=True)
+    progress = on_progress or (lambda *_: None)
+    cancelled = is_cancelled or (lambda: False)
+    label = concept or display_name or slug
+
+    frames_by_state: dict[str, list] = {}
+    total_rows = len(atlas.ROW_SPECS)
+    logger.info("pet hatch %r: generating %d animation rows", slug, total_rows)
+
+    # Generate every state's row strip concurrently — they're independent
+    # grounded calls, so the hatch waits for the slowest row, not their sum. A
+    # single row failing is tolerated (idle is guaranteed below).
+    def _gen_row(spec: tuple[str, int, int]) -> tuple[str, list | None]:
+        state, _row, count = spec
+        if cancelled():
+            return state, None
+        t0 = time.monotonic()
+        last_exc: Exception | None = None
+        # Self-healing: a model occasionally returns a row whose poses are touching
+        # (no clean gutters), which slices badly. We retry such rolls; only the
+        # final attempt falls back to lenient ``auto`` slicing so a stubborn row
+        # still yields *something* rather than dropping the whole row.
+        for attempt in range(_ROW_GEN_ATTEMPTS):
+            if cancelled():
+                return state, None
+            strict = attempt < _ROW_GEN_ATTEMPTS - 1
+            try:
+                strips = imagegen.generate(
+                    prompts.build_row_prompt(state, count, label, style=style),
+                    n=1,
+                    reference_images=[base],
+                    provider=sprite,
+                    prefix=f"pet_row_{state}",
+                    # Wider canvas → each frame gets real horizontal room, so winged
+                    # poses keep a full, healthy size and still leave clean gutters.
+                    aspect_ratio="landscape",
+                )
+                # ``components`` requires clean per-pose gutters (raises otherwise),
+                # so a touching roll is rejected and regenerated; the last attempt
+                # uses ``auto`` (equal-slot fallback, never raises). Raw (fit=False)
+                # so normalize_cells registers the whole pet at once.
+                method = "components" if strict else "auto"
+                frames = atlas.extract_strip_frames(strips[0], count, method=method, fit=False)
+                logger.info(
+                    "pet hatch %r: row %r ready in %.1fs (attempt %d)",
+                    slug, state, time.monotonic() - t0, attempt + 1,
+                )
+                return state, frames
+            except Exception as exc:  # noqa: BLE001 - retried; one bad row is tolerated
+                last_exc = exc
+                logger.warning(
+                    "pet hatch %r: row %r attempt %d/%d failed: %s",
+                    slug, state, attempt + 1, _ROW_GEN_ATTEMPTS, exc,
+                )
+        logger.warning(
+            "pet hatch %r: row %r gave up after %.1fs: %s",
+            slug, state, time.monotonic() - t0, last_exc,
+        )
+        return state, None
+
+    # running-left is derived by mirroring running-right (guaranteed-consistent
+    # and one fewer generation), so we don't generate it directly.
+    generated_specs = [spec for spec in atlas.ROW_SPECS if spec[0] != "running-left"]
+
+    workers = max(1, min(len(generated_specs), _MAX_PARALLEL_GENERATIONS))
+    done = 0
+    with ThreadPoolExecutor(max_workers=workers) as pool:
+        futures = [pool.submit(_gen_row, spec) for spec in generated_specs]
+        # as_completed runs on the caller (request) thread, so progress events
+        # emitted here inherit the request transport — unlike the worker threads.
+        for fut in as_completed(futures):
+            if cancelled():
+                logger.info("pet hatch %r: cancelled — dropping remaining rows", slug)
+                for pending in futures:
+                    pending.cancel()
+                break
+            state, frames = fut.result()
+            done += 1
+            progress("row", f"{state}:{done}:{total_rows}")
+            if frames:
+                frames_by_state[state] = frames
+
+    if cancelled():
+        raise GenerationError("hatch cancelled")
+
+    # Derive running-left from the approved running-right row (per-frame mirror,
+    # preserving order/timing). Missing running-right is rejected below; a pet
+    # without its canonical walk cycle is a failed hatch, not a shippable mascot.
+    right = frames_by_state.get("running-right")
+    if right:
+        done += 1
+        progress("row", f"running-left:{done}:{total_rows}")
+        frames_by_state["running-left"] = atlas.mirror_frames(right)
+        logger.info("pet hatch %r: row 'running-left' mirrored from running-right", slug)
+    else:
+        logger.warning("pet hatch %r: no running-right to mirror; left walk left empty", slug)
+
+    # Idle is the resting state the renderer falls back to — guarantee it.
+    if not frames_by_state.get("idle"):
+        progress("row", "idle-fallback")
+        frames_by_state["idle"] = [atlas.single_frame(base, fit=False)]
+
+    progress("compose", "")
+    logger.info("pet hatch %r: composing atlas from %d states", slug, len(frames_by_state))
+    # One shared scale + baseline across every state so the pet never slides or
+    # pulses size between frames; compose just packs the normalized cells.
+    sheet = atlas.compose_atlas(atlas.normalize_cells(frames_by_state))
+    validation = atlas.validate_atlas(sheet)
+    if not validation["ok"]:
+        raise GenerationError("; ".join(validation["errors"]) or "atlas validation failed")
+    filled_states = set(validation["filled_states"])
+    missing_required = sorted(_REQUIRED_STATES - filled_states)
+    if missing_required:
+        raise GenerationError(f"missing required animation row(s): {', '.join(missing_required)}")
+    if len(filled_states) < _MIN_FILLED_STATES:
+        raise GenerationError(
+            f"only {len(filled_states)}/{len(atlas.ROW_SPECS)} animation rows were usable; regenerate"
+        )
+
+    from agent.pet import store
+
+    progress("save", slug)
+    logger.info("pet hatch %r: saving pet", slug)
+    pet = store.register_local_pet(
+        sheet,
+        slug=slug,
+        display_name=display_name or slug,
+        description=description,
+    )
+    return HatchResult(
+        slug=pet.slug,
+        display_name=pet.display_name,
+        spritesheet=pet.spritesheet,
+        states=validation["filled_states"],
+        validation=validation,
+    )

agent/pet/generate/prompts.py

@@ -0,0 +1,183 @@
+"""Prompt builders for pet generation.
+
+Two prompt shapes: a *base* prompt (prompt-only, produces the canonical look the
+user picks between) and per-*state* *row* prompts (grounded on the chosen base,
+produce one horizontal strip of N poses). Prompts stay concise and
+sprite-production oriented; the identity lock and "one transparent row" framing
+matter more than flowery description.
+
+We generate the full petdex/Codex nine-state set (see
+:data:`agent.pet.generate.atlas.ROW_SPECS`) so a hatched pet is a valid
+``petdex submit`` spritesheet.
+"""
+
+from __future__ import annotations
+
+# What each petdex/Codex state should depict (kept short — these go straight into
+# the row prompt). Phrased to avoid the common sprite-gen failure modes (detached
+# effects, motion lines, shadows). Critical distinction: ``running`` is the
+# *working* state (in place), while ``running-right`` / ``running-left`` are the
+# actual directional walk/run cycles.
+STATE_ACTIONS: dict[str, str] = {
+    "idle": "a calm idle loop: subtle breathing, a tiny blink or gentle bob, no big gestures",
+    "running-right": (
+        "a sideways walk/run locomotion cycle moving to the RIGHT: the character "
+        "faces and travels right with clear directional steps, a smooth gait loop"
+    ),
+    "running-left": (
+        "a sideways walk/run locomotion cycle moving to the LEFT: the character "
+        "faces and travels left with clear directional steps (the mirror of the "
+        "right-facing run)"
+    ),
+    "waving": "a friendly greeting: raising a paw/hand/limb to wave, clear up-and-down gesture",
+    "jumping": "a happy celebration jump: anticipation, lift off the ground, peak, and land",
+    "failed": "a sad or deflated reaction: slumped, dejected, small frown — readable but not noisy",
+    "waiting": (
+        "an expectant 'waiting on you' pose: looking up/out as if asking for input "
+        "or approval — distinct from idle and review"
+    ),
+    "running": (
+        "focused active work, staying IN PLACE (NOT walking or foot-running): "
+        "leaning in, concentrating, busy 'thinking / processing / typing' energy"
+    ),
+    "review": "careful inspection: a focused lean, head tilt, studying something intently",
+}
+
+_STYLE_HINTS: dict[str, str] = {
+    # Default to the popular petdex look: crisp 16-bit PIXEL ART, not the smooth
+    # 2D illustration (let alone 3D render) gpt-image reaches for by default.
+    "auto": (
+        " Style: crisp 16-bit PIXEL-ART game sprite — visible square pixels, a small "
+        "limited palette, clean dark outline, flat cel shading, chunky chibi "
+        "proportions, like a classic SNES/JRPG party member or a petdex.dev mascot. "
+        "Absolutely NOT 3D-rendered, NOT a smooth painted or vector illustration, "
+        "NOT photorealistic — no soft gradients, no realistic lighting, no figurine look."
+    ),
+    "pixel": " Render in clean 16-bit pixel-art style with visible square pixels and a limited palette.",
+    "plush": " Render as a soft plush toy.",
+    "clay": " Render as a claymation / soft 3D clay figure.",
+    "sticker": " Render as a glossy die-cut sticker.",
+    "flat-vector": " Render in flat vector mascot style.",
+    "3d-toy": " Render as a glossy 3D toy.",
+    "painterly": " Render in a soft painterly style.",
+}
+
+_BACKGROUND = (
+    "Center the character on a SINGLE flat, uniform, high-contrast chroma-key "
+    "background — pure hot magenta #FF00FF (only if magenta appears on the "
+    "character, use pure green #00FF00 instead). The background is ONE continuous "
+    "even color that completely surrounds the character with NO gradient, "
+    "vignette, texture, pattern, scenery, shadow, ground line, frame, border, "
+    "panel, comic cell, gutter line, grid, or divider of any kind, so it keys out "
+    "cleanly. The background color must not appear anywhere on the character. "
+    "No text, no labels, no speech bubbles, no UI."
+)
+
+
+def style_hint(style: str | None) -> str:
+    return _STYLE_HINTS.get((style or "auto").strip().lower(), "")
+
+
+# Row strips are generated on the wider landscape canvas (see imagegen.generate /
+# orchestrate). The extra width is what lets each pose stay a healthy size AND
+# leave a real gutter — used here only to cite concrete pixel numbers.
+_ASSUMED_STRIP_WIDTH = 1536
+
+
+def _spacing_spec(frame_count: int) -> tuple[int, int]:
+    """(per-pose width px, gap px) for a row of *frame_count* poses.
+
+    Pixel counts alone don't hold — the model fills each slot edge-to-edge with
+    the full wingspan, so neighbors touch even when bodies are spaced. The lever
+    that works is proportional containment on a wide canvas: give each pose its
+    own equal cell and keep the ENTIRE silhouette (wings/tail/halo included)
+    inside it. On the 1536px landscape strip ~70% occupancy still leaves a
+    generous gutter, so the pet stays a normal, good-looking size — no shrinking.
+    """
+    slots = max(1, frame_count)
+    slot_w = _ASSUMED_STRIP_WIDTH / slots
+    pose_px = round(slot_w * 0.7)
+    gap_px = max(48, round(slot_w * 0.3))
+    return pose_px, gap_px
+
+
+# Per-draft nudges so the 4 base options are actually distinct — gpt-image returns
+# near-duplicates for a single prompt. We vary the *look* (palette, build,
+# expression, accents), NOT the pose, so the chosen base still grounds clean,
+# consistent animation rows.
+BASE_VARIATIONS: tuple[str, ...] = (
+    "",
+    "a distinctly different colour palette and markings",
+    "a heavier, broader silhouette with sturdier proportions",
+    "a different facial structure and expression matching the concept tone, with unique accent/accessory details",
+    "a leaner, taller build and an alternate colour scheme",
+    "bolder, more saturated colours and a stronger expression matching the concept tone",
+)
+
+
+def build_base_prompt(concept: str, *, style: str | None = "auto", variation: str = "") -> str:
+    """The base look: a single, clean, centered full-body mascot.
+
+    *variation* differentiates one draft from the next (see :data:`BASE_VARIATIONS`).
+    """
+    concept = (concept or "a distinctive mascot creature").strip()
+    nudge = f" Make this design distinct: {variation}." if variation else ""
+    return (
+        f"A stylized mascot pet character: {concept}. "
+        "Honor the requested tone and mood exactly (cute, eerie, scary, menacing, whimsical, etc.) "
+        "while staying non-graphic. "
+        "Compact, whole-body silhouette that reads clearly at small size, "
+        "clear readable facial features, simple consistent palette. "
+        # A neutral, symmetric, at-rest stance makes the cleanest identity anchor
+        "Neutral front-facing standing pose, upright and symmetric, arms/limbs "
+        "relaxed at the sides, feet together on the ground, any cape/accessories "
+        "hanging straight and still."
+        f"{nudge} "
+        f"{_BACKGROUND}{style_hint(style)}"
+    )
+
+
+def build_row_prompt(state: str, frame_count: int, concept: str, *, style: str | None = "auto") -> str:
+    """A row strip: *frame_count* poses of the SAME character, left→right.
+
+    The attached base image is the identity source of truth; the prompt locks
+    species, palette, face, and props to it.
+    """
+    action = STATE_ACTIONS.get(state, "a simple idle pose")
+    concept = (concept or "the mascot").strip()
+    pose_px, gap_px = _spacing_spec(frame_count)
+    return (
+        f"Using the attached reference image as the exact same character "
+        f"(same species, face, colors, markings, proportions, and props), "
+        "preserving the same emotional tone/mood (e.g., scary stays scary, cute stays cute), "
+        f"draw a single WIDE horizontal strip of {frame_count} animation frames showing {action}. "
+        f"LAYOUT: arrange {frame_count} poses in ONE horizontal row at equal spacing, "
+        "each pose centered in its own imaginary equal region. Draw NO panel borders, "
+        "NO comic cells, NO boxes, NO vertical divider/gutter lines, NO grid, NO frame "
+        "outlines between poses — the backdrop is one unbroken flat field behind all of them. "
+        "Fill the WHOLE strip with the SAME single flat chroma-key color as the attached "
+        "reference image's background (identical hue in every frame, no per-pose color shifts). "
+        f"SPACING (critical): draw each pose at a consistent, healthy, clearly "
+        f"visible size (roughly {pose_px}px wide on a {_ASSUMED_STRIP_WIDTH}px "
+        f"strip) — do NOT shrink it tiny — but keep its ENTIRE silhouette "
+        f"(wings, tail, halo, horns, cape, every appendage) fully INSIDE its own "
+        f"cell. Leave at least {gap_px}px of empty chroma-key background between "
+        f"neighboring silhouettes at their closest point (wingtip to wingtip), and "
+        f"the same empty margin before the first pose and after the last. If a wing, "
+        f"cape, or tail would reach into a neighbor, FOLD or angle it inward rather "
+        f"than letting it cross the gap. Silhouettes must NEVER touch, overlap, "
+        f"share a shadow, share a ground line, share motion trails, or merge into "
+        f"one connected shape. "
+        # Registration: a clean sprite sheet keeps the character locked in place
+        # so only the action moves — this is what stops the loop sliding/pulsing.
+        "REGISTRATION (critical): the character is the SAME height and SAME width "
+        "in every frame, drawn at the SAME scale, centered over the SAME point, "
+        "with all feet aligned to the SAME invisible horizontal baseline across the "
+        "whole strip — this baseline is conceptual ONLY: draw NO ground line, floor, "
+        "platform, horizon, or contact shadow beneath the feet. Keep the body's center, size, and stance fixed frame to "
+        "frame — ONLY the limbs/features the action needs may move. Capes, cloaks, "
+        "bags, and scarves stay in the SAME place and shape every frame (no "
+        "swinging, flowing, or drifting) unless the action itself requires it. No "
+        "pose is cropped at the strip edges. "
+        f"{_BACKGROUND}{style_hint(style)}"
+    )

agent/pet/manifest.py

@@ -0,0 +1,165 @@
+"""Fetch the public petdex manifest.
+
+``https://petdex.dev/api/manifest`` 307-redirects to a JSON document on R2:
+
+    {
+      "generatedAt": "...",
+      "total": 2926,
+      "pets": [
+        {"slug": "boba", "displayName": "Boba", "kind": "creature",
+         "submittedBy": "railly",
+         "spritesheetUrl": "https://assets.petdex.dev/.../spritesheet.webp",
+         "petJsonUrl": "https://assets.petdex.dev/.../pet.json",
+         "zipUrl": "https://assets.petdex.dev/.../boba.zip"},
+        ...
+      ]
+    }
+
+Read-only and unauthenticated; no credentials involved.
+"""
+
+from __future__ import annotations
+
+import logging
+import threading
+import time
+from dataclasses import dataclass
+
+logger = logging.getLogger(__name__)
+
+MANIFEST_URL = "https://petdex.dev/api/manifest"
+
+_DEFAULT_TIMEOUT = 10.0
+
+# In-process cache for the (large, slow, identical-per-call) manifest. The list
+# is a static CDN object that barely changes, yet a single session can ask for
+# it many times — every gallery open, plus a full re-fetch per install/select
+# (``find_entry``). A short TTL collapses those into one network hit without
+# going stale for long. Cleared by :func:`clear_cache` (tests).
+_MANIFEST_TTL = 300.0
+_cache: tuple[float, list[ManifestEntry]] | None = None
+
+_prefetch_lock = threading.Lock()
+_prefetching = False
+
+
+def clear_cache() -> None:
+    """Drop the cached manifest (forces the next fetch to hit the network)."""
+    global _cache
+    _cache = None
+
+
+def _cache_is_warm() -> bool:
+    return _cache is not None and time.monotonic() - _cache[0] < _MANIFEST_TTL
+
+
+def prefetch(*, timeout: float = _DEFAULT_TIMEOUT) -> None:
+    """Warm the manifest cache in a daemon thread — idempotent, never blocks.
+
+    The desktop picker calls this when it loads the (instant) local-only gallery
+    so the full petdex catalog is usually cached by the time it's requested,
+    without ever holding up the user's own pets on a network round-trip.
+    """
+    global _prefetching
+
+    if _cache_is_warm():
+        return
+
+    with _prefetch_lock:
+        if _prefetching:
+            return
+        _prefetching = True
+
+    def _run() -> None:
+        global _prefetching
+        try:
+            fetch_manifest(timeout=timeout)
+        except Exception as exc:  # noqa: BLE001 - best-effort warm
+            logger.debug("petdex manifest prefetch failed: %s", exc)
+        finally:
+            _prefetching = False
+
+    threading.Thread(target=_run, name="petdex-prefetch", daemon=True).start()
+
+
+@dataclass(frozen=True)
+class ManifestEntry:
+    """A single pet's row in the manifest."""
+
+    slug: str
+    display_name: str
+    kind: str
+    submitted_by: str
+    spritesheet_url: str
+    pet_json_url: str
+    zip_url: str
+
+    @classmethod
+    def from_dict(cls, data: dict) -> "ManifestEntry":
+        return cls(
+            slug=str(data.get("slug", "")).strip(),
+            display_name=str(data.get("displayName", "") or data.get("slug", "")),
+            kind=str(data.get("kind", "") or "pet"),
+            submitted_by=str(data.get("submittedBy", "") or ""),
+            spritesheet_url=str(data.get("spritesheetUrl", "") or ""),
+            pet_json_url=str(data.get("petJsonUrl", "") or ""),
+            zip_url=str(data.get("zipUrl", "") or ""),
+        )
+
+
+class ManifestError(RuntimeError):
+    """Raised when the manifest can't be fetched or parsed."""
+
+
+def fetch_manifest(*, timeout: float = _DEFAULT_TIMEOUT, force: bool = False) -> list[ManifestEntry]:
+    """Return every approved pet from the public manifest.
+
+    Cached in-process for ``_MANIFEST_TTL`` seconds (pass ``force=True`` to
+    bypass). Follows the 307 redirect to R2.  Raises :class:`ManifestError` on
+    any network/parse failure so callers can surface a clean message.
+    """
+    global _cache
+
+    if not force and _cache is not None and time.monotonic() - _cache[0] < _MANIFEST_TTL:
+        return _cache[1]
+
+    try:
+        import httpx
+    except ImportError as exc:  # pragma: no cover - httpx is a core dep
+        raise ManifestError("httpx is required to fetch the petdex manifest") from exc
+
+    try:
+        resp = httpx.get(
+            MANIFEST_URL,
+            timeout=timeout,
+            follow_redirects=True,
+            headers={"User-Agent": "hermes-agent-petdex"},
+        )
+        resp.raise_for_status()
+        payload = resp.json()
+    except Exception as exc:  # noqa: BLE001 - normalize to one error type
+        raise ManifestError(f"could not fetch petdex manifest: {exc}") from exc
+
+    pets = payload.get("pets") if isinstance(payload, dict) else None
+    if not isinstance(pets, list):
+        raise ManifestError("petdex manifest had no 'pets' array")
+
+    entries: list[ManifestEntry] = []
+    for raw in pets:
+        if not isinstance(raw, dict):
+            continue
+        entry = ManifestEntry.from_dict(raw)
+        if entry.slug and entry.spritesheet_url:
+            entries.append(entry)
+
+    _cache = (time.monotonic(), entries)
+    return entries
+
+
+def find_entry(slug: str, *, timeout: float = _DEFAULT_TIMEOUT) -> ManifestEntry | None:
+    """Return the manifest entry for *slug*, or ``None`` if not listed."""
+    slug = slug.strip().lower()
+    for entry in fetch_manifest(timeout=timeout):
+        if entry.slug.lower() == slug:
+            return entry
+    return None

agent/pet/render.py

@@ -0,0 +1,618 @@
+"""Decode a pet spritesheet and encode frames for a terminal.
+
+Shared by the base CLI (writes the escape bytes to its own stdout) and the
+TUI (``tui_gateway`` ships the encoded bytes to Ink, which writes them) so the
+decode + capability-detection + protocol-encoding logic exists exactly once.
+
+Supported output modes, in fidelity order:
+
+- ``kitty``   — the kitty graphics protocol (kitty, Ghostty, WezTerm).
+- ``iterm``   — iTerm2 inline images (iTerm2, WezTerm).
+- ``sixel``   — DEC sixel (xterm -ti vt340, foot, mlterm, WezTerm, …).
+- ``unicode`` — 24-bit half-block downscale; works in any truecolor terminal.
+
+Frame decoding requires Pillow (a core Hermes dependency).  If Pillow or the
+spritesheet is unavailable the renderer degrades to ``unicode`` text or an
+empty string rather than raising.
+"""
+
+from __future__ import annotations
+
+import base64
+import io
+import logging
+import os
+import sys
+from functools import lru_cache
+from pathlib import Path
+
+from agent.pet.constants import (
+    DEFAULT_SCALE,
+    FRAME_H,
+    FRAME_W,
+    FRAMES_PER_STATE,
+    PetState,
+    state_row_index,
+)
+
+logger = logging.getLogger(__name__)
+
+# Public render-mode names accepted by ``display.pet.render_mode``.
+RENDER_MODES = ("auto", "kitty", "iterm", "sixel", "unicode", "off")
+
+
+# ─────────────────────────────────────────────────────────────────────────
+# Terminal capability detection
+# ─────────────────────────────────────────────────────────────────────────
+
+def detect_terminal_graphics() -> str:
+    """Best-effort detection of the richest graphics protocol available.
+
+    Env-based (non-blocking — we never issue a DA1/terminal query that could
+    hang a pipe).  Returns one of ``kitty`` / ``iterm`` / ``sixel`` /
+    ``unicode``.  Conservative: unknown terminals get ``unicode``, which works
+    anywhere with truecolor.
+    """
+    term = os.environ.get("TERM", "").lower()
+    term_program = os.environ.get("TERM_PROGRAM", "").lower()
+
+    # The VS Code / Cursor integrated terminal sets TERM_PROGRAM=vscode
+    # authoritatively but does NOT scrub the terminal env vars it inherits when
+    # launched from another emulator (ITERM_SESSION_ID, KITTY_WINDOW_ID, …).
+    # Trusting those leaks emits an image protocol the embedded xterm.js can't
+    # display — you get a blank frame. Inline images there are opt-in
+    # (terminal.integrated.enableImages), so default to half-blocks, which
+    # always render in its truecolor grid. Users who enabled images can pin
+    # display.pet.render_mode explicitly.
+    if term_program == "vscode":
+        return "unicode"
+
+    # kitty graphics protocol
+    if os.environ.get("KITTY_WINDOW_ID") or "kitty" in term or "ghostty" in term:
+        return "kitty"
+    if term_program in {"ghostty"}:
+        return "kitty"
+
+    # WezTerm speaks both kitty and iterm; prefer kitty (richer placement).
+    if term_program == "wezterm" or os.environ.get("WEZTERM_PANE"):
+        return "kitty"
+
+    # iTerm2 inline images
+    if term_program == "iterm.app" or os.environ.get("ITERM_SESSION_ID"):
+        return "iterm"
+
+    # sixel-capable terminals (env heuristics only)
+    if term_program in {"mintty"} or "foot" in term or "mlterm" in term:
+        return "sixel"
+    if "sixel" in term:
+        return "sixel"
+
+    return "unicode"
+
+
+def resolve_mode(configured: str | None, *, stream=None) -> str:
+    """Resolve the effective render mode from config + the environment.
+
+    ``configured`` is ``display.pet.render_mode`` (``auto`` → detect).  Returns
+    ``off`` when not attached to a TTY (no point emitting graphics into a pipe
+    or logfile).
+    """
+    mode = (configured or "auto").strip().lower()
+    if mode not in RENDER_MODES:
+        mode = "auto"
+    if mode == "off":
+        return "off"
+
+    stream = stream or sys.stdout
+    try:
+        if not (hasattr(stream, "isatty") and stream.isatty()):
+            return "off"
+    except (ValueError, OSError):
+        return "off"
+
+    if mode == "auto":
+        return detect_terminal_graphics()
+    return mode
+
+
+# ─────────────────────────────────────────────────────────────────────────
+# Frame decoding
+# ─────────────────────────────────────────────────────────────────────────
+
+def _open_sheet(path: Path):
+    from PIL import Image
+
+    img = Image.open(path)
+    return img.convert("RGBA")
+
+
+# Max alpha at/below which a frame counts as blank padding.  petdex sheets are
+# left-packed: a state with fewer real frames than ``FRAMES_PER_STATE`` fills
+# the trailing columns with fully transparent cells.  Animating into one flashes
+# the pet blank, so we stop the row at the first such gap.
+_BLANK_ALPHA = 8
+
+
+def _frame_is_blank(frame) -> bool:
+    """True if *frame* has no meaningfully opaque pixel (transparent padding)."""
+    return frame.getchannel("A").getextrema()[1] <= _BLANK_ALPHA
+
+
+@lru_cache(maxsize=16)
+def _raw_frames(
+    sheet_path: str,
+    state_value: str,
+    frame_w: int,
+    frame_h: int,
+    frames_per_state: int,
+) -> tuple:
+    """Cropped, padding-trimmed RGBA frames for one state row (unscaled).
+
+    Steps across the row until the first blank column so pets with ragged
+    per-state frame counts never animate into empty padding.  Cached; returns
+    ``()`` on any decode failure.
+    """
+    try:
+        sheet = _open_sheet(Path(sheet_path))
+        cols = max(1, sheet.width // frame_w)
+        rows = max(1, sheet.height // frame_h)
+        row = state_row_index(state_value, rows)
+        top = row * frame_h
+        # Clamp the row to the sheet (some pets ship fewer rows than the 8 the
+        # taxonomy reserves).
+        if top + frame_h > sheet.height:
+            top = max(0, sheet.height - frame_h)
+
+        frames = []
+        for i in range(min(frames_per_state, cols)):
+            left = i * frame_w
+            frame = sheet.crop((left, top, left + frame_w, top + frame_h))
+            if _frame_is_blank(frame):
+                break  # trailing transparent padding — real frames end here
+            frames.append(frame)
+        return tuple(frames)
+    except Exception as exc:  # noqa: BLE001 - cosmetic feature, never fatal
+        logger.debug("pet frame decode failed (%s, %s): %s", sheet_path, state_value, exc)
+        return ()
+
+
+@lru_cache(maxsize=8)
+def _frames_for(
+    sheet_path: str,
+    state_value: str,
+    frame_w: int,
+    frame_h: int,
+    frames_per_state: int,
+    scale_w: int,
+    scale_h: int,
+):
+    """Return padding-trimmed RGBA frames for one state row, scaled.
+
+    Thin scaling layer over :func:`_raw_frames`; both are cached so repeated
+    frame requests during animation are free.
+    """
+    raw = _raw_frames(sheet_path, state_value, frame_w, frame_h, frames_per_state)
+    if not raw or (scale_w, scale_h) == (frame_w, frame_h):
+        return list(raw)
+    from PIL import Image
+
+    return [f.resize((scale_w, scale_h), Image.LANCZOS) for f in raw]
+
+
+def state_frame_counts(
+    sheet_path: str | Path,
+    *,
+    frame_w: int = FRAME_W,
+    frame_h: int = FRAME_H,
+    frames_per_state: int = FRAMES_PER_STATE,
+) -> dict[str, int]:
+    """Map each driven :class:`PetState` → its real (padding-trimmed) frame count.
+
+    The single source of truth for "how many frames does this state actually
+    have?".  The CLI/TUI consume the trimmed frame lists directly; the gateway
+    ships this map to the desktop canvas, which steps its own loop.
+    """
+    return {
+        state.value: len(
+            _raw_frames(str(sheet_path), state.value, frame_w, frame_h, frames_per_state)
+        )
+        for state in PetState
+    }
+
+
+# ─────────────────────────────────────────────────────────────────────────
+# Encoders
+# ─────────────────────────────────────────────────────────────────────────
+
+def _png_bytes(frame) -> bytes:
+    buf = io.BytesIO()
+    frame.save(buf, format="PNG")
+    return buf.getvalue()
+
+
+def _kitty_apc(ctrl: str, data: str) -> str:
+    """Emit a kitty APC escape for *data*, chunked into ≤4096-byte ``m`` pieces."""
+    chunk = 4096
+    if len(data) <= chunk:
+        return f"\x1b_G{ctrl},m=0;{data}\x1b\\"
+    out = [f"\x1b_G{ctrl},m=1;{data[:chunk]}\x1b\\"]
+    rest = data[chunk:]
+    while rest:
+        piece, rest = rest[:chunk], rest[chunk:]
+        out.append(f"\x1b_Gm={1 if rest else 0};{piece}\x1b\\")
+    return "".join(out)
+
+
+def _encode_kitty(frame, *, cell_cols: int | None = None, cell_rows: int | None = None) -> str:
+    """Encode one frame via the kitty graphics protocol (transmit + display).
+
+    ``a=T`` transmits & displays at the cursor; ``c``/``r`` request a display
+    box in terminal cells so successive frames overwrite the same area.
+    """
+    ctrl = "f=100,a=T,q=2"
+    if cell_cols:
+        ctrl += f",c={cell_cols}"
+    if cell_rows:
+        ctrl += f",r={cell_rows}"
+    return _kitty_apc(ctrl, base64.standard_b64encode(_png_bytes(frame)).decode("ascii"))
+
+
+# ─────────────────────────────────────────────────────────────────────────
+# kitty Unicode placeholders
+#
+# Ink (the TUI's React-for-terminal layer) owns the screen and measures every
+# cell's width, so it can't host raw kitty image escapes (no width to count,
+# clobbered on the next repaint). kitty's *Unicode placeholder* protocol is the
+# grid-safe path: transmit the image once (q=2, virtual placement U=1), then the
+# host app prints ordinary-width placeholder cells (U+10EEEE + diacritics) whose
+# foreground color encodes the image id. Ink counts those as width-1 text, so
+# layout stays correct and the terminal paints the image underneath.
+#   https://sw.kovidgoyal.net/kitty/graphics-protocol/#unicode-placeholders
+# ─────────────────────────────────────────────────────────────────────────
+
+_KITTY_PLACEHOLDER = "\U0010eeee"
+
+# Row/column diacritics, in order (index → diacritic). Verbatim from kitty's
+# gen/rowcolumn-diacritics.txt (Unicode 6.0.0, combining class 230). Index i is
+# the diacritic that encodes the number i; we only ever need the row index.
+_ROWCOL_DIACRITICS: tuple[int, ...] = (
+    0x0305, 0x030D, 0x030E, 0x0310, 0x0312, 0x033D, 0x033E, 0x033F, 0x0346, 0x034A,
+    0x034B, 0x034C, 0x0350, 0x0351, 0x0352, 0x0357, 0x035B, 0x0363, 0x0364, 0x0365,
+    0x0366, 0x0367, 0x0368, 0x0369, 0x036A, 0x036B, 0x036C, 0x036D, 0x036E, 0x036F,
+    0x0483, 0x0484, 0x0485, 0x0486, 0x0487, 0x0592, 0x0593, 0x0594, 0x0595, 0x0597,
+    0x0598, 0x0599, 0x059C, 0x059D, 0x059E, 0x059F, 0x05A0, 0x05A1, 0x05A8, 0x05A9,
+    0x05AB, 0x05AC, 0x05AF, 0x05C4, 0x0610, 0x0611, 0x0612, 0x0613, 0x0614, 0x0615,
+    0x0616, 0x0617, 0x0657, 0x0658, 0x0659, 0x065A, 0x065B, 0x065D, 0x065E, 0x06D6,
+    0x06D7, 0x06D8, 0x06D9, 0x06DA, 0x06DB, 0x06DC, 0x06DF, 0x06E0, 0x06E1, 0x06E2,
+    0x06E4, 0x06E7, 0x06E8, 0x06EB, 0x06EC, 0x0730, 0x0732, 0x0733, 0x0735, 0x0736,
+    0x073A, 0x073D, 0x073F, 0x0740, 0x0741, 0x0743, 0x0745, 0x0747, 0x0749, 0x074A,
+    0x07EB, 0x07EC, 0x07ED, 0x07EE, 0x07EF, 0x07F0, 0x07F1, 0x07F3, 0x0816, 0x0817,
+    0x0818, 0x0819, 0x081B, 0x081C, 0x081D, 0x081E, 0x081F, 0x0820, 0x0821, 0x0822,
+    0x0823, 0x0825, 0x0826, 0x0827, 0x0829, 0x082A, 0x082B, 0x082C, 0x082D, 0x0951,
+    0x0953, 0x0954, 0x0F82, 0x0F83, 0x0F86, 0x0F87, 0x135D, 0x135E, 0x135F, 0x17DD,
+    0x193A, 0x1A17, 0x1A75, 0x1A76, 0x1A77, 0x1A78, 0x1A79, 0x1A7A, 0x1A7B, 0x1A7C,
+    0x1B6B, 0x1B6D, 0x1B6E, 0x1B6F, 0x1B70, 0x1B71, 0x1B72, 0x1B73, 0x1CD0, 0x1CD1,
+    0x1CD2, 0x1CDA, 0x1CDB, 0x1CE0, 0x1DC0, 0x1DC1, 0x1DC3, 0x1DC4, 0x1DC5, 0x1DC6,
+    0x1DC7, 0x1DC8, 0x1DC9, 0x1DCB, 0x1DCC, 0x1DD1, 0x1DD2, 0x1DD3, 0x1DD4, 0x1DD5,
+    0x1DD6, 0x1DD7, 0x1DD8, 0x1DD9, 0x1DDA, 0x1DDB, 0x1DDC, 0x1DDD, 0x1DDE, 0x1DDF,
+    0x1DE0, 0x1DE1, 0x1DE2, 0x1DE3, 0x1DE4, 0x1DE5, 0x1DE6, 0x1DFE, 0x20D0, 0x20D1,
+    0x20D4, 0x20D5, 0x20D6, 0x20D7, 0x20DB, 0x20DC, 0x20E1, 0x20E7, 0x20E9, 0x20F0,
+    0x2CEF, 0x2CF0, 0x2CF1, 0x2DE0, 0x2DE1, 0x2DE2, 0x2DE3, 0x2DE4, 0x2DE5, 0x2DE6,
+    0x2DE7, 0x2DE8, 0x2DE9, 0x2DEA, 0x2DEB, 0x2DEC, 0x2DED, 0x2DEE, 0x2DEF, 0x2DF0,
+    0x2DF1, 0x2DF2, 0x2DF3, 0x2DF4, 0x2DF5, 0x2DF6, 0x2DF7, 0x2DF8, 0x2DF9, 0x2DFA,
+    0x2DFB, 0x2DFC, 0x2DFD, 0x2DFE, 0x2DFF, 0xA66F, 0xA67C, 0xA67D, 0xA6F0, 0xA6F1,
+    0xA8E0, 0xA8E1, 0xA8E2, 0xA8E3, 0xA8E4, 0xA8E5, 0xA8E6, 0xA8E7, 0xA8E8, 0xA8E9,
+    0xA8EA, 0xA8EB, 0xA8EC, 0xA8ED, 0xA8EE, 0xA8EF, 0xA8F0, 0xA8F1, 0xAAB0, 0xAAB2,
+    0xAAB3, 0xAAB7, 0xAAB8, 0xAABE, 0xAABF, 0xAAC1, 0xFE20, 0xFE21, 0xFE22, 0xFE23,
+    0xFE24, 0xFE25, 0xFE26, 0x10A0F, 0x10A38, 0x1D185, 0x1D186, 0x1D187, 0x1D188,
+    0x1D189, 0x1D1AA, 0x1D1AB, 0x1D1AC, 0x1D1AD, 0x1D242, 0x1D243, 0x1D244,
+)
+
+
+def kitty_image_id(slug: str) -> int:
+    """Stable per-pet image id in ``[1, 0x7FFF]``.
+
+    The id is encoded in the placeholder's 24-bit foreground color, so it must
+    be non-zero and fit comfortably under ``0xFFFFFF``. A small CRC keeps it
+    deterministic per slug (so re-renders reuse the same terminal-side image)
+    while making collisions between two different pets unlikely.
+    """
+    import zlib
+
+    return (zlib.crc32(slug.encode("utf-8")) % 0x7FFE) + 1
+
+
+def kitty_color_hex(image_id: int) -> str:
+    """Hex foreground color (``#rrggbb``) that encodes *image_id* for kitty."""
+    return "#%06x" % (image_id & 0xFFFFFF)
+
+
+def kitty_placeholder_rows(cols: int, rows: int) -> list[str]:
+    """Build the placeholder text grid for an *rows*×*cols* image.
+
+    Each line is one row of the grid: the first cell carries the row diacritic
+    (column defaults to 0), and the remaining ``cols-1`` bare placeholders let
+    the terminal auto-increment the column. The foreground color (the image id)
+    is applied by the caller / Ink, not embedded here.
+    """
+    cols = max(1, cols)
+    out: list[str] = []
+    for r in range(max(1, rows)):
+        idx = min(r, len(_ROWCOL_DIACRITICS) - 1)
+        first = _KITTY_PLACEHOLDER + chr(_ROWCOL_DIACRITICS[idx])
+        out.append(first + _KITTY_PLACEHOLDER * (cols - 1))
+    return out
+
+
+def _encode_kitty_virtual(frame, *, image_id: int, cols: int, rows: int) -> str:
+    """Transmit a frame as a kitty *virtual* placement for Unicode placeholders.
+
+    ``a=T`` transmits and creates the placement in one shot; ``U=1`` marks it
+    virtual (no on-screen output, cursor untouched); ``q=2`` suppresses the
+    terminal's OK/error replies that would otherwise corrupt the host app's
+    output. Re-sending with the same ``i`` replaces the image, so the static
+    placeholder cells animate underneath.
+    """
+    ctrl = f"a=T,U=1,i={image_id},c={cols},r={rows},f=100,q=2"
+    return _kitty_apc(ctrl, base64.standard_b64encode(_png_bytes(frame)).decode("ascii"))
+
+
+def _encode_iterm(frame, *, cell_cols: int | None = None, cell_rows: int | None = None) -> str:
+    """Encode one frame as an iTerm2 inline image (OSC 1337 File)."""
+    payload = base64.standard_b64encode(_png_bytes(frame)).decode("ascii")
+    size = len(payload)
+    args = [f"inline=1", f"size={size}", "preserveAspectRatio=1"]
+    if cell_cols:
+        args.append(f"width={cell_cols}")
+    if cell_rows:
+        args.append(f"height={cell_rows}")
+    return f"\x1b]1337;File={';'.join(args)}:{payload}\x07"
+
+
+def _encode_sixel(frame) -> str:
+    """Encode one frame as DEC sixel.
+
+    Quantizes to an adaptive palette (≤255 colors) and emits the sixel band
+    stream.  Pillow has no sixel writer, so this is a compact hand-rolled
+    encoder.  Transparent pixels render as background (color register skipped).
+    """
+    from PIL import Image
+
+    rgba = frame
+    # Composite onto transparent-as-skip: track alpha to decide background.
+    pal = rgba.convert("RGB").quantize(colors=255, method=Image.MEDIANCUT)
+    palette = pal.getpalette() or []
+    px = pal.load()
+    alpha = rgba.getchannel("A").load()
+    w, h = pal.size
+
+    out = ["\x1bP0;1;0q", '"1;1;%d;%d' % (w, h)]
+    # Color register definitions (sixel uses 0..100 scale).
+    used = sorted({px[x, y] for y in range(h) for x in range(w)})
+    for idx in used:
+        r = palette[idx * 3] if idx * 3 < len(palette) else 0
+        g = palette[idx * 3 + 1] if idx * 3 + 1 < len(palette) else 0
+        b = palette[idx * 3 + 2] if idx * 3 + 2 < len(palette) else 0
+        out.append("#%d;2;%d;%d;%d" % (idx, r * 100 // 255, g * 100 // 255, b * 100 // 255))
+
+    # Emit in 6-row bands.
+    for band in range(0, h, 6):
+        for color_idx in used:
+            line = ["#%d" % color_idx]
+            run_char = None
+            run_len = 0
+
+            def flush():
+                nonlocal run_char, run_len
+                if run_char is None:
+                    return
+                if run_len > 3:
+                    line.append("!%d%s" % (run_len, run_char))
+                else:
+                    line.append(run_char * run_len)
+                run_char, run_len = None, 0
+
+            for x in range(w):
+                bits = 0
+                for bit in range(6):
+                    y = band + bit
+                    if y < h and alpha[x, y] > 32 and px[x, y] == color_idx:
+                        bits |= 1 << bit
+                ch = chr(63 + bits)
+                if ch == run_char:
+                    run_len += 1
+                else:
+                    flush()
+                    run_char, run_len = ch, 1
+            flush()
+            out.append("".join(line) + "$")  # carriage return within band
+        out.append("-")  # next band
+    out.append("\x1b\\")
+    return "".join(out)
+
+
+_HALF_BLOCK = "▀"
+
+# A single half-block cell: top pixel + bottom pixel as (r, g, b, a) tuples.
+Cell = tuple[tuple[int, int, int, int], tuple[int, int, int, int]]
+
+
+def _downscale_cells(frame, *, target_cols: int) -> list[list[Cell]]:
+    """Downscale a frame to a grid of half-block cells.
+
+    Each cell pairs a top and bottom pixel so one terminal row encodes two
+    pixel rows.  Returns rows of ``((tr,tg,tb,ta),(br,bg,bb,ba))`` — the
+    framework-neutral representation shared by the ANSI encoder (CLI) and the
+    structured ``cells`` API (Ink).
+    """
+    from PIL import Image
+
+    target_cols = max(4, target_cols)
+    aspect = frame.height / max(1, frame.width)
+    target_rows = max(2, int(round(target_cols * aspect * 0.5)) * 2)
+    small = frame.resize((target_cols, target_rows), Image.LANCZOS).convert("RGBA")
+    px = small.load()
+
+    grid: list[list[Cell]] = []
+    for y in range(0, target_rows, 2):
+        row: list[Cell] = []
+        for x in range(target_cols):
+            top = px[x, y]
+            bottom = px[x, y + 1] if y + 1 < target_rows else (0, 0, 0, 0)
+            row.append((top, bottom))
+        grid.append(row)
+    return grid
+
+
+def _encode_unicode(frame, *, target_cols: int) -> str:
+    """Downscale to truecolor ANSI half-blocks (one char = 2 vertical pixels)."""
+    lines: list[str] = []
+    for row in _downscale_cells(frame, target_cols=target_cols):
+        cells: list[str] = []
+        for (tr, tg, tb, ta), (br, bg, bb, ba) in row:
+            if ta < 32 and ba < 32:
+                cells.append("\x1b[0m ")  # fully transparent → blank
+                continue
+            cells.append(f"\x1b[38;2;{tr};{tg};{tb}m\x1b[48;2;{br};{bg};{bb}m{_HALF_BLOCK}")
+        lines.append("".join(cells) + "\x1b[0m")
+    return "\n".join(lines)
+
+
+# ─────────────────────────────────────────────────────────────────────────
+# Public renderer
+# ─────────────────────────────────────────────────────────────────────────
+
+class PetRenderer:
+    """Holds a pet's spritesheet and yields encoded frames per (state, index).
+
+    Construct once per pet, then call :meth:`frame` on an animation timer.
+    Cheap to call repeatedly — decoded frames are cached.
+    """
+
+    def __init__(
+        self,
+        spritesheet: str | Path,
+        *,
+        mode: str = "unicode",
+        scale: float = DEFAULT_SCALE,
+        unicode_cols: int = 20,
+        frame_w: int = FRAME_W,
+        frame_h: int = FRAME_H,
+        frames_per_state: int = FRAMES_PER_STATE,
+    ) -> None:
+        self.spritesheet = str(spritesheet)
+        self.mode = mode if mode in RENDER_MODES else "unicode"
+        self.scale = scale
+        self.unicode_cols = unicode_cols
+        self.frame_w = frame_w
+        self.frame_h = frame_h
+        self.frames_per_state = frames_per_state
+
+    @property
+    def available(self) -> bool:
+        return self.mode != "off" and Path(self.spritesheet).is_file()
+
+    def frame_count(self, state: PetState | str) -> int:
+        return len(self._frames(state))
+
+    def _frames(self, state: PetState | str):
+        value = state.value if isinstance(state, PetState) else str(state)
+        scale_w = max(1, int(self.frame_w * self.scale))
+        scale_h = max(1, int(self.frame_h * self.scale))
+        return _frames_for(
+            self.spritesheet,
+            value,
+            self.frame_w,
+            self.frame_h,
+            self.frames_per_state,
+            scale_w,
+            scale_h,
+        )
+
+    def cells(self, state: PetState | str, index: int, *, cols: int | None = None) -> list[list[Cell]]:
+        """Return one frame as a half-block cell grid (framework-neutral).
+
+        Used by the TUI, which renders the grid with native Ink color props
+        instead of raw ANSI.  Returns ``[]`` when no frame is available.
+        """
+        frames = self._frames(state)
+        if not frames:
+            return []
+        frame = frames[index % len(frames)]
+        return _downscale_cells(frame, target_cols=cols or self.unicode_cols)
+
+    def _cell_box(self, frame) -> tuple[int, int]:
+        """Terminal cell box for a scaled frame (~8×16 px per cell).
+
+        Must match :meth:`frame` graphics sizing — kitty stretches the image to
+        fill ``c``×``r`` cells, so these must reflect the scaled pixel
+        dimensions, not a native-aspect column count (that upscales small pets).
+        """
+        return max(1, frame.width // 8), max(1, frame.height // 16)
+
+    def kitty_payload(self, state: PetState | str, *, image_id: int) -> dict | None:
+        """Build the kitty Unicode-placeholder payload for one state.
+
+        Returns ``{cols, rows, placeholder, frames}`` where ``frames`` is a
+        list of transmit escapes (one per animation frame, all reusing
+        ``image_id``) and ``placeholder`` is the static text grid Ink paints.
+        Placement geometry is derived from the scaled frame pixels (via
+        :meth:`_cell_box`), not ``unicode_cols`` — kitty upscales to fill
+        ``c``×``r`` cells. ``None`` when no frame is available.
+        """
+        frames = self._frames(state)
+        if not frames:
+            return None
+        cols, rows = self._cell_box(frames[0])
+        return {
+            "cols": cols,
+            "rows": rows,
+            "placeholder": kitty_placeholder_rows(cols, rows),
+            "frames": [
+                _encode_kitty_virtual(f, image_id=image_id, cols=cols, rows=rows) for f in frames
+            ],
+        }
+
+    def frame(self, state: PetState | str, index: int) -> str:
+        """Return the encoded escape string for one frame, or ``""``.
+
+        ``index`` is taken modulo the available frame count so callers can pass
+        a free-running counter.
+        """
+        if self.mode == "off":
+            return ""
+        frames = self._frames(state)
+        if not frames:
+            return ""
+        frame = frames[index % len(frames)]
+        cell_cols, cell_rows = self._cell_box(frame)
+
+        try:
+            if self.mode == "kitty":
+                return _encode_kitty(frame, cell_cols=cell_cols, cell_rows=cell_rows)
+            if self.mode == "iterm":
+                return _encode_iterm(frame, cell_cols=cell_cols, cell_rows=cell_rows)
+            if self.mode == "sixel":
+                return _encode_sixel(frame)
+            return _encode_unicode(frame, target_cols=self.unicode_cols)
+        except Exception as exc:  # noqa: BLE001 - degrade silently
+            logger.debug("pet frame encode failed (mode=%s): %s", self.mode, exc)
+            return ""
+
+
+def build_renderer(
+    spritesheet: str | Path,
+    *,
+    configured_mode: str | None = None,
+    scale: float = DEFAULT_SCALE,
+    unicode_cols: int = 20,
+    stream=None,
+) -> PetRenderer:
+    """Convenience factory: resolve the mode from config+env, then construct."""
+    mode = resolve_mode(configured_mode, stream=stream)
+    return PetRenderer(
+        spritesheet,
+        mode=mode,
+        scale=scale,
+        unicode_cols=unicode_cols,
+    )

agent/pet/state.py

@@ -0,0 +1,81 @@
+"""Map agent activity → a :class:`PetState`.
+
+This is the one place the "what is the agent doing right now?" → "which
+animation row?" decision lives.  Each surface feeds it the signals it already
+tracks:
+
+- CLI    — ``KawaiiSpinner`` waiting/thinking state + tool outcomes.
+- TUI    — gateway ``tool.start/complete`` + ``message.delta/complete`` events.
+- Desktop — the ``$busy``/``$awaitingResponse``/tool-event nanostores
+            (re-implemented in TS, but mirroring this priority order).
+
+Keeping the priority order here (and documenting it) lets the TypeScript
+mirror stay faithful without a second design.
+"""
+
+from __future__ import annotations
+
+from collections.abc import Iterable
+from typing import Any
+
+from agent.pet.constants import PetState
+
+
+def todos_all_done(todos: Iterable[Any] | None) -> bool:
+    """True iff there's ≥1 todo and every one is completed/cancelled.
+
+    The "celebrate" beat (``JUMP``) fires when a plan finishes; this mirrors
+    the TUI's ``isTodoDone`` so the trigger is defined once across surfaces.
+    Accepts dicts (``{"status": ...}``) or objects with a ``status`` attr.
+    """
+    items = list(todos or [])
+    if not items:
+        return False
+
+    def _status(t: Any) -> Any:
+        return t.get("status") if isinstance(t, dict) else getattr(t, "status", None)
+
+    return all(_status(t) in ("completed", "cancelled") for t in items)
+
+
+def derive_pet_state(
+    *,
+    busy: bool = False,
+    awaiting_input: bool = False,
+    error: bool = False,
+    celebrate: bool = False,
+    just_completed: bool = False,
+    tool_running: bool = False,
+    reasoning: bool = False,
+) -> PetState:
+    """Resolve the animation state from coarse activity signals.
+
+    Priority (highest first) — only one row can show at a time, so the most
+    salient signal wins:
+
+    1. ``error``          → ``FAILED``  (a tool/turn just failed)
+    2. ``celebrate``      → ``JUMP``    (explicit success beat, e.g. todos done)
+    3. ``just_completed`` → ``WAVE``    (turn finished cleanly / greeting)
+    4. ``awaiting_input`` → ``WAITING`` (blocked on the user — a clarify/approval
+       prompt is open; this outranks the in-flight signals below because the turn
+       is paused on *you*, even though a tool is technically mid-call)
+    5. ``tool_running``   → ``RUN``     (a tool is executing)
+    6. ``reasoning``      → ``REVIEW``  (model is thinking / reading)
+    7. ``busy``           → ``RUN``     (turn in flight, unspecified work)
+    8. otherwise          → ``IDLE``
+    """
+    if error:
+        return PetState.FAILED
+    if celebrate:
+        return PetState.JUMP
+    if just_completed:
+        return PetState.WAVE
+    if awaiting_input:
+        return PetState.WAITING
+    if tool_running:
+        return PetState.RUN
+    if reasoning:
+        return PetState.REVIEW
+    if busy:
+        return PetState.RUN
+    return PetState.IDLE

agent/pet/store.py

@@ -0,0 +1,503 @@
+"""On-disk pet store — install / list / resolve pets.
+
+Pets live under ``get_hermes_home()/pets/<slug>/`` so every profile gets its
+own set (we deliberately do **not** reuse petdex's ``~/.codex/pets`` default —
+that's owned by the petdex npm CLI and isn't profile-aware).  Each installed
+pet directory holds:
+
+    pets/<slug>/
+        pet.json            # {id, displayName, description, spritesheetPath}
+        spritesheet.webp    # (or .png)
+
+The active pet is resolved from the caller-supplied ``display.pet.slug`` config
+value (falling back to the first installed pet), so this module stays free of
+the config loader.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import re
+from dataclasses import dataclass
+from pathlib import Path
+
+from hermes_constants import get_hermes_home
+
+logger = logging.getLogger(__name__)
+
+_DOWNLOAD_TIMEOUT = 60.0
+
+
+class PetStoreError(RuntimeError):
+    """Raised on install/IO failures."""
+
+
+@dataclass(frozen=True)
+class InstalledPet:
+    """A pet present on disk."""
+
+    slug: str
+    display_name: str
+    description: str
+    directory: Path
+    spritesheet: Path
+    created_by: str = ""  # "generator" for pets hatched locally; "" for petdex installs
+
+    @property
+    def exists(self) -> bool:
+        return self.spritesheet.is_file()
+
+    @property
+    def generated(self) -> bool:
+        return self.created_by == "generator"
+
+
+def pets_dir() -> Path:
+    """Return the profile-scoped pets directory (created on demand)."""
+    path = get_hermes_home() / "pets"
+    path.mkdir(parents=True, exist_ok=True)
+    return path
+
+
+def _read_pet_json(directory: Path) -> dict:
+    pet_json = directory / "pet.json"
+    if not pet_json.is_file():
+        return {}
+    try:
+        return json.loads(pet_json.read_text(encoding="utf-8"))
+    except (OSError, ValueError) as exc:
+        logger.debug("unreadable pet.json in %s: %s", directory, exc)
+        return {}
+
+
+def _resolve_spritesheet(directory: Path, meta: dict) -> Path:
+    """Find the spritesheet for a pet dir.
+
+    Honors ``spritesheetPath`` from pet.json, else probes the conventional
+    filenames (``spritesheet.{webp,png}`` and petdex R2's ``sprite.webp``).
+    """
+    declared = str(meta.get("spritesheetPath", "") or "").strip()
+    if declared:
+        candidate = directory / declared
+        if candidate.is_file():
+            return candidate
+    for name in ("spritesheet.webp", "spritesheet.png", "sprite.webp", "sprite.png"):
+        candidate = directory / name
+        if candidate.is_file():
+            return candidate
+    # Default expectation even if missing, so callers get a stable path.
+    return directory / "spritesheet.webp"
+
+
+def _safe_slug(slug: str) -> str:
+    """Normalize a slug to a single bare path segment.
+
+    Pet slugs index into ``pets_dir()/<slug>/`` for load/remove, so a value
+    carrying path separators (``../``, absolute paths) could escape the pets
+    directory. Strip every separator and reject ``.``/``..`` so callers can
+    only ever name a direct child of the pets directory.
+    """
+    segment = Path(str(slug).strip()).name
+    if segment in ("", ".", ".."):
+        return ""
+    return segment
+
+
+def load_pet(slug: str) -> InstalledPet | None:
+    """Return the :class:`InstalledPet` for *slug*, or ``None`` if absent."""
+    slug = _safe_slug(slug)
+    if not slug:
+        return None
+    directory = pets_dir() / slug
+    if not directory.is_dir():
+        return None
+    meta = _read_pet_json(directory)
+    return InstalledPet(
+        slug=slug,
+        display_name=str(meta.get("displayName", "") or slug),
+        description=str(meta.get("description", "") or ""),
+        directory=directory,
+        spritesheet=_resolve_spritesheet(directory, meta),
+        created_by=str(meta.get("createdBy", "") or ""),
+    )
+
+
+def installed_pets() -> list[InstalledPet]:
+    """Return every installed pet (dirs containing a usable spritesheet)."""
+    out: list[InstalledPet] = []
+    for child in sorted(pets_dir().iterdir()):
+        if not child.is_dir():
+            continue
+        pet = load_pet(child.name)
+        if pet and pet.exists:
+            out.append(pet)
+    return out
+
+
+def resolve_active_pet(configured_slug: str | None = None) -> InstalledPet | None:
+    """Resolve which pet to display.
+
+    Precedence: the configured slug (``display.pet.slug``) if it's installed,
+    otherwise the first installed pet alphabetically, otherwise ``None``.
+    """
+    if configured_slug:
+        pet = load_pet(configured_slug.strip())
+        if pet and pet.exists:
+            return pet
+    pets = installed_pets()
+    return pets[0] if pets else None
+
+
+def install_pet(slug: str, *, force: bool = False, timeout: float = _DOWNLOAD_TIMEOUT) -> InstalledPet:
+    """Download *slug* from the manifest into the pets directory.
+
+    Idempotent: a fully-installed pet is returned as-is unless *force*.  Raises
+    :class:`PetStoreError` / :class:`~agent.pet.manifest.ManifestError` on
+    failure.
+    """
+    from agent.pet.manifest import find_entry
+
+    slug = _safe_slug(slug)
+    if not slug:
+        raise PetStoreError("invalid pet slug")
+    existing = load_pet(slug)
+    if existing and existing.exists and not force:
+        return existing
+
+    entry = find_entry(slug, timeout=timeout)
+    if entry is None:
+        raise PetStoreError(f"pet '{slug}' is not in the petdex manifest")
+
+    # Host-pin every asset URL to petdex. The manifest is trusted (HTTPS from
+    # petdex.dev), but pin the asset hosts too so a compromised/spoofed manifest
+    # can't redirect the download at an arbitrary host. Matches thumbnail_png.
+    if not _is_petdex_host(entry.spritesheet_url):
+        raise PetStoreError(f"refusing non-petdex spritesheet host for '{slug}'")
+
+    directory = pets_dir() / slug
+    directory.mkdir(parents=True, exist_ok=True)
+
+    sprite_ext = ".png" if entry.spritesheet_url.lower().split("?")[0].endswith(".png") else ".webp"
+    sprite_path = directory / f"spritesheet{sprite_ext}"
+
+    _download(entry.spritesheet_url, sprite_path, timeout=timeout)
+
+    # Fetch the upstream pet.json if present; otherwise synthesize a minimal
+    # one so the local layout is self-describing.
+    meta: dict = {}
+    if entry.pet_json_url and _is_petdex_host(entry.pet_json_url):
+        try:
+            meta = _download_json(entry.pet_json_url, timeout=timeout)
+        except Exception as exc:  # noqa: BLE001 - non-fatal, fall back below
+            logger.debug("pet.json fetch failed for %s: %s", slug, exc)
+    if not isinstance(meta, dict) or not meta:
+        meta = {"id": slug, "displayName": entry.display_name, "description": ""}
+    meta["spritesheetPath"] = sprite_path.name
+    meta.setdefault("id", slug)
+    meta.setdefault("displayName", entry.display_name)
+    (directory / "pet.json").write_text(json.dumps(meta, indent=2), encoding="utf-8")
+
+    pet = load_pet(slug)
+    if pet is None or not pet.exists:
+        raise PetStoreError(f"install of '{slug}' did not produce a spritesheet")
+    return pet
+
+
+def slugify(name: str) -> str:
+    """Lowercase, hyphenate, and strip a display name into a filesystem slug."""
+    slug = re.sub(r"[^a-z0-9]+", "-", (name or "").strip().lower()).strip("-")
+    return slug or "pet"
+
+
+def unique_slug(name: str) -> str:
+    """A :func:`slugify` result that doesn't collide with an existing pet dir."""
+    base = slugify(name)
+    slug = base
+    counter = 2
+    while (pets_dir() / slug).exists():
+        slug = f"{base}-{counter}"
+        counter += 1
+    return slug
+
+
+def _write_spritesheet(source, dest: Path) -> None:
+    """Write *source* (PIL image, bytes, or path) as a lossless WebP at *dest*."""
+    if isinstance(source, (bytes, bytearray)):
+        dest.write_bytes(bytes(source))
+        return
+
+    from PIL import Image
+
+    if isinstance(source, (str, Path)):
+        with Image.open(source) as opened:
+            image = opened.convert("RGBA")
+    else:
+        image = source.convert("RGBA")
+    image.save(dest, format="WEBP", lossless=True, quality=100, method=6, exact=True)
+
+
+def register_local_pet(
+    spritesheet,
+    *,
+    slug: str,
+    display_name: str = "",
+    description: str = "",
+) -> InstalledPet:
+    """Write a locally-generated pet into the store and return it.
+
+    *spritesheet* may be a PIL image, raw WebP/PNG bytes, or a path. The pet
+    appears in :func:`installed_pets` immediately, and because :func:`install_pet`
+    returns an already-on-disk pet before consulting the manifest, it can be
+    adopted (``pet.select`` / ``/pet <slug>``) without a manifest entry.
+    """
+    slug = slugify(slug)
+    directory = pets_dir() / slug
+    directory.mkdir(parents=True, exist_ok=True)
+    sprite_path = directory / "spritesheet.webp"
+    try:
+        _write_spritesheet(spritesheet, sprite_path)
+    except Exception as exc:  # noqa: BLE001 - normalize to one error type
+        raise PetStoreError(f"could not write spritesheet for '{slug}': {exc}") from exc
+
+    meta = {
+        "id": slug,
+        "displayName": display_name or slug,
+        "description": description or "",
+        "spritesheetPath": sprite_path.name,
+        "createdBy": "generator",
+    }
+    (directory / "pet.json").write_text(json.dumps(meta, indent=2), encoding="utf-8")
+
+    pet = load_pet(slug)
+    if pet is None or not pet.exists:
+        raise PetStoreError(f"register of generated pet '{slug}' did not produce a spritesheet")
+    return pet
+
+
+def export_pet(slug: str) -> tuple[str, bytes]:
+    """Zip an installed pet's folder (pet.json + spritesheet) → (filename, bytes).
+
+    Dotfiles (cached thumbs, backups) are skipped so the archive is a clean,
+    re-importable pet package. Raises :class:`PetStoreError` if not installed.
+    """
+    import io
+    import zipfile
+
+    root = pets_dir()
+    directory = root / slug.strip()
+    # Guard against traversal: the target must be a direct child of pets_dir.
+    if directory.resolve().parent != root.resolve() or not directory.is_dir():
+        raise PetStoreError(f"pet '{slug}' is not installed")
+
+    name = directory.name
+    buf = io.BytesIO()
+    with zipfile.ZipFile(buf, "w", zipfile.ZIP_DEFLATED) as archive:
+        for path in sorted(directory.iterdir()):
+            if path.is_file() and not path.name.startswith("."):
+                archive.write(path, f"{name}/{path.name}")
+    return f"{name}.zip", buf.getvalue()
+
+
+_THUMB_FRAME_W = 192
+_THUMB_FRAME_H = 208
+_THUMB_W = 96  # rendered ~40px; 2x+ keeps it crisp on HiDPI
+
+
+def _thumbs_dir() -> Path:
+    path = pets_dir() / ".thumbs"
+    path.mkdir(parents=True, exist_ok=True)
+    return path
+
+
+def _is_petdex_host(url: str) -> bool:
+    """True only for petdex.dev hosts — bounds server-side fetch (anti-SSRF)."""
+    from urllib.parse import urlparse
+
+    try:
+        host = (urlparse(url).hostname or "").lower()
+    except ValueError:
+        return False
+    return host == "petdex.dev" or host.endswith(".petdex.dev")
+
+
+def thumbnail_png(slug: str, *, source_url: str = "", timeout: float = 30.0) -> bytes | None:
+    """Return a small idle-frame PNG for *slug*, cached on disk.
+
+    Crops the top-left (idle, frame 0) cell of the spritesheet and downsamples
+    it to a thumbnail. Source preference: an installed spritesheet on disk, else
+    *source_url* — but only when it points at petdex (so the gateway never
+    fetches an arbitrary client-supplied URL). Returns ``None`` when there's no
+    usable source or Pillow/network fails; callers render a placeholder.
+
+    Doing this server-side sidesteps the renderer's CSP / R2 hotlink limits that
+    break a direct ``<img src=cdn>`` and lets the result ride the authenticated
+    gateway as a same-origin data URL.
+    """
+    slug = slug.strip()
+    if not slug:
+        return None
+
+    cache = _thumbs_dir() / f"{slug}.png"
+    if cache.is_file():
+        try:
+            return cache.read_bytes()
+        except OSError:
+            pass
+
+    sheet_bytes: bytes | None = None
+    pet = load_pet(slug)
+    if pet and pet.exists:
+        try:
+            sheet_bytes = pet.spritesheet.read_bytes()
+        except OSError:
+            sheet_bytes = None
+
+    if sheet_bytes is None and source_url and _is_petdex_host(source_url):
+        try:
+            import httpx
+
+            resp = httpx.get(
+                source_url,
+                timeout=timeout,
+                follow_redirects=True,
+                headers={"User-Agent": "hermes-agent-petdex"},
+            )
+            resp.raise_for_status()
+            sheet_bytes = resp.content
+        except Exception as exc:  # noqa: BLE001 - cosmetic, degrade to placeholder
+            logger.debug("thumb fetch failed for %s: %s", slug, exc)
+
+    if not sheet_bytes:
+        return None
+
+    try:
+        import io
+
+        from PIL import Image
+
+        with Image.open(io.BytesIO(sheet_bytes)) as im:
+            frame = im.convert("RGBA").crop(
+                (0, 0, min(_THUMB_FRAME_W, im.width), min(_THUMB_FRAME_H, im.height))
+            )
+            height = round(_THUMB_W * _THUMB_FRAME_H / _THUMB_FRAME_W)
+            frame = frame.resize((_THUMB_W, height), Image.NEAREST)
+            buf = io.BytesIO()
+            frame.save(buf, format="PNG")
+            data = buf.getvalue()
+    except Exception as exc:  # noqa: BLE001
+        logger.debug("thumb crop failed for %s: %s", slug, exc)
+        return None
+
+    try:
+        cache.write_bytes(data)
+    except OSError:
+        pass
+    return data
+
+
+def remove_pet(slug: str) -> bool:
+    """Delete an installed pet directory.  Returns True if anything was removed."""
+    import shutil
+
+    slug = _safe_slug(slug)
+    if not slug:
+        return False
+
+    # The cached thumbnail lives in pets/.thumbs/<slug>.png — OUTSIDE the pet
+    # dir, so rmtree won't catch it. Drop it too, or a later pet that reuses this
+    # slug renders this one's stale thumbnail.
+    try:
+        (_thumbs_dir() / f"{slug}.png").unlink(missing_ok=True)
+    except OSError:
+        pass
+
+    directory = pets_dir() / slug
+    if not directory.is_dir():
+        return False
+    shutil.rmtree(directory, ignore_errors=True)
+    return not directory.exists()
+
+
+def rename_pet(slug: str, display_name: str) -> str | None:
+    """Rename a pet's ``displayName`` AND realign its slug/dir to match.
+
+    Generated pets are hatched under a provisional, prompt-derived slug; when
+    the user names the pet on the reveal screen we make that name the real
+    identity so lists/subtitles show what they typed, not the prompt. The dir is
+    renamed to ``slugify(name)`` (and the cached thumbnail moved alongside it)
+    whenever that yields a free, different slug — otherwise the slug is left as
+    is. Returns the resulting slug on success, or ``None`` on failure.
+    """
+    slug = _safe_slug(slug)
+    display_name = (display_name or "").strip()
+    if not slug or not display_name:
+        return None
+    directory = pets_dir() / slug
+    pet_json = directory / "pet.json"
+    if not pet_json.is_file():
+        return None
+    try:
+        meta = json.loads(pet_json.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        meta = {}
+    if not isinstance(meta, dict):
+        meta = {}
+    meta["displayName"] = display_name
+
+    new_slug = slug
+    desired = slugify(display_name)
+    if desired and desired != slug and not (pets_dir() / desired).exists():
+        try:
+            directory.rename(pets_dir() / desired)
+            try:
+                (_thumbs_dir() / f"{slug}.png").rename(_thumbs_dir() / f"{desired}.png")
+            except OSError:
+                pass
+            directory = pets_dir() / desired
+            pet_json = directory / "pet.json"
+            new_slug = desired
+            meta["id"] = new_slug
+        except OSError:
+            new_slug = slug  # keep the provisional slug if the move fails
+
+    try:
+        pet_json.write_text(json.dumps(meta, indent=2), encoding="utf-8")
+    except OSError:
+        return None
+    return new_slug
+
+
+def _download(url: str, dest: Path, *, timeout: float) -> None:
+    import httpx
+
+    try:
+        with httpx.stream(
+            "GET",
+            url,
+            timeout=timeout,
+            follow_redirects=True,
+            headers={"User-Agent": "hermes-agent-petdex"},
+        ) as resp:
+            resp.raise_for_status()
+            tmp = dest.with_suffix(dest.suffix + ".part")
+            with tmp.open("wb") as fh:
+                for chunk in resp.iter_bytes():
+                    fh.write(chunk)
+            tmp.replace(dest)
+    except Exception as exc:  # noqa: BLE001
+        raise PetStoreError(f"download failed for {url}: {exc}") from exc
+
+
+def _download_json(url: str, *, timeout: float) -> dict:
+    import httpx
+
+    resp = httpx.get(
+        url,
+        timeout=timeout,
+        follow_redirects=True,
+        headers={"User-Agent": "hermes-agent-petdex"},
+    )
+    resp.raise_for_status()
+    data = resp.json()
+    return data if isinstance(data, dict) else {}

agent/prompt_builder.py

@@ -243,7 +243,10 @@ KANBAN_GUIDANCE = (
     "- **Workspace.** `cd $HERMES_KANBAN_WORKSPACE` first. For a `worktree` kind "
     "with no `.git`, `git worktree add <path> "
     "${HERMES_KANBAN_BRANCH:-wt/$HERMES_KANBAN_TASK}` from the main repo, then "
-    "cd there.\n"
+    "cd there. For a project-linked task the workspace is a fresh "
+    "`<repo>/.worktrees/<task-id>` and `$HERMES_KANBAN_BRANCH` a deterministic "
+    "`<project-slug>/<task-id>` — the main repo is two levels up, so run "
+    "`git worktree add` from there.\n"
     "- **Deliverables.** Files a human wants go in "
     "`kanban_complete(artifacts=[<absolute paths>])` (top-level param; paths in "
     "`metadata` are NOT uploaded). Files must exist at completion.\n"
@@ -709,7 +712,24 @@ PLATFORM_HINTS = {
         "(those are only intercepted on messaging platforms like Telegram, "
         "Discord, Slack, etc.; on the CLI they render as literal text). "
         "When referring to a file you created or changed, just state its "
-        "absolute path in plain text; the user can open it from there."
+        "absolute path in plain text; the user can open it from there. "
+        "Cron jobs scheduled from this session are LOCAL-ONLY: their output is "
+        "saved (viewable via cronjob action='list') but is NOT delivered back "
+        "into this terminal — there is no live-delivery channel here. If the "
+        "user wants to be notified when a job runs, the job's `deliver` must "
+        "target a gateway-connected messaging platform (e.g. deliver='telegram' "
+        "or 'all'). Do not promise the user that a deliver='origin' or "
+        "default-deliver cron job will message them in this session."
+    ),
+    "tui": (
+        "You are running in the Hermes terminal UI (TUI). "
+        "Cron jobs scheduled from this session are LOCAL-ONLY: their output is "
+        "saved (viewable via cronjob action='list') but is NOT delivered back "
+        "into this TUI session — there is no live-delivery channel here. If the "
+        "user wants to be notified when a job runs, the job's `deliver` must "
+        "target a gateway-connected messaging platform (e.g. deliver='telegram' "
+        "or 'all'). Do not promise the user that a deliver='origin' or "
+        "default-deliver cron job will message them in this session."
     ),
     "sms": (
         "You are communicating via SMS. Keep responses concise and use plain text "

agent/tool_dispatch_helpers.py

@@ -11,7 +11,8 @@ Pure module-level utilities extracted from ``run_agent.py``:
   ``_append_subdir_hint_to_multimodal`` — envelope helpers for the
   ``{"_multimodal": True, "content": [...], "text_summary": ...}`` dict
   shape returned by tools like ``computer_use``.
-* ``_extract_file_mutation_targets`` / ``_extract_error_preview`` —
+* ``_extract_file_mutation_targets`` / ``_extract_landed_file_mutation_paths`` /
+  ``_extract_error_preview`` —
   per-turn file-mutation verifier inputs.
 * ``_trajectory_normalize_msg`` — strip image blobs from a message for
   trajectory saving.
@@ -269,6 +270,35 @@ def _extract_file_mutation_targets(tool_name: str, args: Dict[str, Any]) -> List
     return []
 
 
+def _extract_landed_file_mutation_paths(
+    tool_name: str,
+    args: Dict[str, Any],
+    result: Any,
+) -> List[str]:
+    """Return the concrete file paths a successful mutation reports."""
+    targets = _extract_file_mutation_targets(tool_name, args)
+    if tool_name not in _FILE_MUTATING_TOOLS or not isinstance(result, str):
+        return targets
+    try:
+        data = json.loads(result.strip())
+    except Exception:
+        return targets
+    if not isinstance(data, dict):
+        return targets
+
+    files = data.get("files_modified")
+    if isinstance(files, list):
+        landed = [str(p) for p in files if p]
+        if landed:
+            return landed
+
+    resolved = data.get("resolved_path")
+    if resolved:
+        return [str(resolved)]
+
+    return targets
+
+
 def _extract_error_preview(result: Any, max_len: int = 180) -> str:
     """Pull a one-line error summary out of a tool result for footer display."""
     text = _multimodal_text_summary(result) if result is not None else ""
@@ -411,6 +441,7 @@ __all__ = [
     "_multimodal_text_summary",
     "_append_subdir_hint_to_multimodal",
     "_extract_file_mutation_targets",
+    "_extract_landed_file_mutation_paths",
     "_extract_error_preview",
     "_trajectory_normalize_msg",
     "make_tool_result_message",

agent/tool_executor.py

@@ -69,12 +69,35 @@ def _budget_for_agent(agent) -> BudgetConfig:
 _MAX_TOOL_WORKERS = 8
 
 
+def _flush_session_db_after_tool_progress(
+    agent,
+    messages: list,
+    *,
+    stage: str,
+) -> None:
+    """Best-effort incremental SessionDB flush for tool-call progress.
+
+    Tool execution can perform side effects that terminate or restart the
+    current Hermes process before the normal turn-end persistence path runs.
+    Flush the already-appended assistant/tool messages immediately so the
+    transcript survives destructive-but-valid tool calls.
+    """
+    try:
+        agent._flush_messages_to_session_db(messages)
+    except Exception as exc:
+        logger.warning("Incremental tool-call persistence failed after %s: %s", stage, exc)
+
+
 def _ra():
     """Lazy reference to ``run_agent`` so patches like ``run_agent._set_interrupt`` work."""
     import run_agent
     return run_agent
 
 
+def _is_interpreter_shutdown_submit_error(exc: RuntimeError) -> bool:
+    return "cannot schedule new futures after interpreter shutdown" in str(exc)
+
+
 def _emit_terminal_post_tool_call(
     agent,
     *,
@@ -279,6 +302,11 @@ def execute_tool_calls_concurrent(agent, assistant_message, messages: list, effe
                 f"[Tool execution cancelled — {tc.function.name} was skipped due to user interrupt]",
                 tc.id,
             ))
+            _flush_session_db_after_tool_progress(
+                agent,
+                messages,
+                stage=f"cancelled tool result {tc.function.name}",
+            )
         return
 
     # ── Parse args + pre-execution bookkeeping ───────────────────────
@@ -581,13 +609,40 @@ def execute_tool_calls_concurrent(agent, assistant_message, messages: list, effe
         if runnable_calls:
             max_workers = min(len(runnable_calls), _MAX_TOOL_WORKERS)
             with concurrent.futures.ThreadPoolExecutor(max_workers=max_workers) as executor:
-                for i, tc, name, args in runnable_calls:
+                for submit_index, (i, tc, name, args) in enumerate(runnable_calls):
                     # Propagate the agent turn's ContextVars (e.g.
                     # _approval_session_key) AND thread-local approval/sudo
                     # callbacks into the worker thread; clears callbacks on exit.
-                    f = executor.submit(
-                        propagate_context_to_thread(_run_tool), i, tc, name, args, parsed_calls[i][3]
-                    )
+                    try:
+                        f = executor.submit(
+                            propagate_context_to_thread(_run_tool), i, tc, name, args, parsed_calls[i][3]
+                        )
+                    except RuntimeError as submit_error:
+                        if not _is_interpreter_shutdown_submit_error(submit_error):
+                            raise
+                        skipped_calls = runnable_calls[submit_index:]
+                        logger.warning(
+                            "interpreter shutdown while scheduling concurrent tools; "
+                            "skipping %d unsubmitted tool(s)",
+                            len(skipped_calls),
+                        )
+                        for skipped_i, _tc, skipped_name, skipped_args in skipped_calls:
+                            if results[skipped_i] is None:
+                                middleware_trace = parsed_calls[skipped_i][3]
+                                result = (
+                                    f"Error executing tool '{skipped_name}': "
+                                    "Python interpreter is shutting down; tool was not started"
+                                )
+                                results[skipped_i] = (
+                                    skipped_name,
+                                    skipped_args,
+                                    result,
+                                    0.0,
+                                    True,
+                                    False,
+                                    middleware_trace,
+                                )
+                        break
                     futures.append(f)
 
                 # Wait for all to complete with periodic heartbeats so the
@@ -768,6 +823,11 @@ def execute_tool_calls_concurrent(agent, assistant_message, messages: list, effe
         # String results pass through unchanged.
         _tool_content = agent._tool_result_content_for_active_model(name, function_result)
         messages.append(make_tool_result_message(name, _tool_content, tc.id))
+        _flush_session_db_after_tool_progress(
+            agent,
+            messages,
+            stage=f"tool result {name}",
+        )
 
         # ── Per-tool /steer drain ───────────────────────────────────
         # Same as the sequential path: drain between each collected
@@ -803,13 +863,16 @@ def execute_tool_calls_sequential(agent, assistant_message, messages: list, effe
                 agent._vprint(f"{agent.log_prefix}⚡ Interrupt: skipping {len(remaining_calls)} tool call(s)", force=True)
             for skipped_tc in remaining_calls:
                 skipped_name = skipped_tc.function.name
-                skip_msg = {
-                    "role": "tool",
-                    "name": skipped_name,
-                    "content": f"[Tool execution cancelled — {skipped_name} was skipped due to user interrupt]",
-                    "tool_call_id": skipped_tc.id,
-                }
-                messages.append(skip_msg)
+                messages.append(make_tool_result_message(
+                    skipped_name,
+                    f"[Tool execution cancelled — {skipped_name} was skipped due to user interrupt]",
+                    skipped_tc.id,
+                ))
+                _flush_session_db_after_tool_progress(
+                    agent,
+                    messages,
+                    stage=f"cancelled tool result {skipped_name}",
+                )
             break
 
         function_name = tool_call.function.name
@@ -1402,6 +1465,11 @@ def execute_tool_calls_sequential(agent, assistant_message, messages: list, effe
         # (see parallel path for rationale). String results pass through.
         _tool_content = agent._tool_result_content_for_active_model(function_name, function_result)
         messages.append(make_tool_result_message(function_name, _tool_content, tool_call.id))
+        _flush_session_db_after_tool_progress(
+            agent,
+            messages,
+            stage=f"tool result {function_name}",
+        )
 
         # ── Per-tool /steer drain ───────────────────────────────────
         # Drain pending steer BETWEEN individual tool calls so the
@@ -1428,6 +1496,11 @@ def execute_tool_calls_sequential(agent, assistant_message, messages: list, effe
                     f"[Tool execution skipped — {skipped_name} was not started. User sent a new message]",
                     skipped_tc.id,
                 ))
+                _flush_session_db_after_tool_progress(
+                    agent,
+                    messages,
+                    stage=f"skipped tool result {skipped_name}",
+                )
             break
 
         if agent.tool_delay > 0 and i < len(assistant_message.tool_calls):

agent/transports/codex.py

@@ -5,12 +5,47 @@ This transport owns format conversion and normalization — NOT client lifecycle
 streaming, or the _run_codex_stream() call path.
 """
 
+import hashlib
+import json
 from typing import Any, Dict, List, Optional
 
 from agent.transports.base import ProviderTransport
 from agent.transports.types import NormalizedResponse, ToolCall
 
 
+def _content_cache_key(instructions: str, tools: Optional[List[Dict[str, Any]]]) -> Optional[str]:
+    """Content-address the prompt cache key from the static request prefix.
+
+    Returns ``pck_<sha256[:24]>`` of (instructions + sorted tool schemas), or
+    None when there is nothing static to key on. The cache key is a routing
+    hint only — never a correctness boundary — so two requests sharing a system
+    prompt and tool set intentionally resolve to the same warm prefix bucket.
+
+    The fix this exists for: recurring cron jobs build session_id as
+    ``cron_<id>_<timestamp>``, so using session_id as the cache key made every
+    fire cache-cold. The static prefix (identity + tools) is identical across
+    fires, so hashing it gives a stable key that stays warm within the
+    provider's cache TTL. Sorting tools by name keeps the hash insertion-order
+    independent.
+    """
+    if not instructions and not tools:
+        return None
+    tools_part = ""
+    if tools:
+        sorted_tools = sorted(
+            (t for t in tools if isinstance(t, dict)),
+            key=lambda t: str(t.get("name") or t.get("type") or ""),
+        )
+        tools_part = json.dumps(
+            sorted_tools, sort_keys=True, ensure_ascii=False, separators=(",", ":")
+        )
+    # \x00 separator so instructions ending in the tool JSON can't collide with
+    # a request whose instructions contain that JSON and whose tools are empty.
+    content = f"{instructions or ''}\x00{tools_part}"
+    digest = hashlib.sha256(content.encode("utf-8", errors="replace")).hexdigest()[:24]
+    return f"pck_{digest}"
+
+
 class ResponsesApiTransport(ProviderTransport):
     """Transport for api_mode='codex_responses'.
 
@@ -71,7 +106,10 @@ class ResponsesApiTransport(ProviderTransport):
         params:
             instructions: str — system prompt (extracted from messages[0] if not given)
             reasoning_config: dict | None — {effort, enabled}
-            session_id: str | None — used for prompt_cache_key + xAI conv header
+            session_id: str | None — transcript/session id; drives the xAI
+                x-grok-conv-id header and the Codex cache-scope headers, and is
+                the fallback prompt_cache_key when there is no static prefix to
+                content-address
             max_tokens: int | None — max_output_tokens
             timeout: float | None — per-request timeout forwarded to the SDK
             request_overrides: dict | None — extra kwargs merged in
@@ -212,10 +250,17 @@ class ResponsesApiTransport(ProviderTransport):
             kwargs["parallel_tool_calls"] = True
 
         session_id = params.get("session_id")
+        # prompt_cache_key is content-addressed from the static prefix
+        # (instructions + tools), NOT session_id — recurring cron jobs carry a
+        # per-fire timestamp in session_id (cron_<id>_<ts>) that made every run
+        # cache-cold. session_id is left untouched for transcript isolation and
+        # the cache-scope routing headers below. Falls back to session_id when
+        # there is no static content to hash.
+        cache_key = _content_cache_key(instructions, response_tools) or session_id
         # xAI Responses takes prompt_cache_key in extra_body (set further
         # down); GitHub Models opts out of cache-key routing entirely.
-        if not is_github_responses and not is_xai_responses and session_id:
-            kwargs["prompt_cache_key"] = session_id
+        if not is_github_responses and not is_xai_responses and cache_key:
+            kwargs["prompt_cache_key"] = cache_key
 
         if reasoning_enabled and is_xai_responses:
             from agent.model_metadata import grok_supports_reasoning_effort
@@ -326,7 +371,7 @@ class ResponsesApiTransport(ProviderTransport):
             merged_extra_body: Dict[str, Any] = {}
             if isinstance(existing_extra_body, dict):
                 merged_extra_body.update(existing_extra_body)
-            merged_extra_body.setdefault("prompt_cache_key", session_id)
+            merged_extra_body.setdefault("prompt_cache_key", cache_key)
             kwargs["extra_body"] = merged_extra_body
 
         return kwargs

agent/turn_context.py

@@ -29,7 +29,10 @@ from dataclasses import dataclass
 from typing import Any, Dict, List, Optional
 
 from agent.iteration_budget import IterationBudget
-from agent.model_metadata import estimate_request_tokens_rough
+from agent.model_metadata import (
+    estimate_messages_tokens_rough,
+    estimate_request_tokens_rough,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -57,6 +60,34 @@ def _compression_made_progress(
     return orig_tokens > 0 and new_tokens < orig_tokens * 0.95
 
 
+def _should_run_preflight_estimate(
+    messages: List[Dict[str, Any]],
+    protect_first_n: int,
+    protect_last_n: int,
+    threshold_tokens: int,
+) -> bool:
+    """Cheap gate for the (expensive) full preflight token estimate.
+
+    Returns ``True`` when either:
+      (a) message count exceeds the protected ranges (the historical gate), or
+      (b) a cheap char-based estimate already crosses the configured threshold
+          — the few-but-huge case from issue #27405 that the count-only gate
+          would silently skip (a handful of very large messages never trips
+          the count condition, so compression was never attempted and the
+          turn hit a hard context-overflow error).
+
+    Branch (b) uses ``estimate_messages_tokens_rough`` (the shared char-based
+    estimator) so a single large base64 image isn't mistaken for ~250K tokens.
+    It intentionally undercounts vs. the full request estimate — it omits the
+    system prompt and tool schemas — because it is only a *hint* deciding
+    whether to pay for the authoritative ``estimate_request_tokens_rough``,
+    which (together with ``should_compress``) makes the real decision.
+    """
+    if len(messages) > protect_first_n + protect_last_n + 1:
+        return True
+    return estimate_messages_tokens_rough(messages) >= threshold_tokens
+
+
 @dataclass
 class TurnContext:
     """Values produced by the turn prologue and consumed by the turn loop."""
@@ -289,10 +320,14 @@ def build_turn_context(
         )
 
     # ── Preflight context compression ──
-    if (
-        agent.compression_enabled
-        and len(messages) > agent.context_compressor.protect_first_n
-                            + agent.context_compressor.protect_last_n + 1
+    # Gate the (expensive) full token estimate behind a cheap pre-check.
+    # See ``_should_run_preflight_estimate`` for the OR semantics that fix
+    # issue #27405 (a few very large messages slipping past the count gate).
+    if agent.compression_enabled and _should_run_preflight_estimate(
+        messages,
+        agent.context_compressor.protect_first_n,
+        agent.context_compressor.protect_last_n,
+        agent.context_compressor.threshold_tokens,
     ):
         _preflight_tokens = estimate_request_tokens_rough(
             messages,
@@ -392,6 +427,8 @@ def build_turn_context(
 
     # Per-turn file-mutation verifier state.
     agent._turn_failed_file_mutations = {}
+    agent._turn_file_mutation_paths = set()
+    agent._verification_stop_nudges = 0
 
     # Record the execution thread so interrupt()/clear_interrupt() can scope
     # the tool-level interrupt signal to THIS agent's thread only.

agent/turn_finalizer.py

@@ -166,6 +166,29 @@ def finalize_turn(
     # same empty-response loop again.
     try:
         agent._drop_trailing_empty_response_scaffolding(messages)
+
+        # When the turn was interrupted and the last message is a tool
+        # result, append a synthetic assistant message to close the
+        # tool-call sequence. Without this, the session persists a
+        # ``tool → user`` alternation that strict providers (Gemini,
+        # Claude) reject, causing them to hallucinate a continuation of
+        # the user's message on the next turn (#48879).
+        #
+        # ``_drop_trailing_empty_response_scaffolding`` only rewinds the
+        # tool tail when an empty-response scaffolding flag is present; a
+        # clean ``/stop`` interrupt after a successful tool sets no such
+        # flag, so the tool result survives as the tail and we close it
+        # here instead. On an interrupt ``final_response`` is typically
+        # empty, so fall back to an explicit placeholder rather than
+        # persisting an empty-content assistant turn.
+        if interrupted and messages and messages[-1].get("role") == "tool":
+            messages.append(
+                {
+                    "role": "assistant",
+                    "content": (final_response or "").strip() or "Operation interrupted.",
+                }
+            )
+
         agent._persist_session(messages, conversation_history)
     except Exception as _persist_err:
         _cleanup_errors.append(f"persist_session: {_persist_err}")

agent/verification_evidence.py

@@ -0,0 +1,618 @@
+"""Coding verification evidence ledger.
+
+This module records what the agent actually proved while working in a code
+workspace. It is deliberately passive: it never decides to run a suite, never
+blocks completion, and never upgrades targeted checks into "repo green".
+"""
+
+from __future__ import annotations
+
+import json
+import re
+import shlex
+import sqlite3
+import tempfile
+import threading
+from dataclasses import dataclass
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+from typing import Any, Optional
+
+from hermes_constants import get_hermes_home
+
+
+_DB_LOCK = threading.Lock()
+_MAX_OUTPUT_SUMMARY_CHARS = 2000
+_MAX_EVIDENCE_AGE_DAYS = 30
+_MAX_EVENTS_PER_SESSION_ROOT = 100
+_MAX_TOTAL_UNREFERENCED_EVENTS = 10_000
+_AD_HOC_SCRIPT_NAME_PREFIXES = ("hermes-verify-", "hermes-ad-hoc-")
+_VERIFY_SCHEMA_VERSION = 1
+_SHELL_SPLIT_RE = re.compile(r"\s*(?:&&|\|\||;)\s*")
+
+
+@dataclass(frozen=True)
+class VerificationEvidence:
+    """A classified command result worth recording."""
+
+    command: str
+    canonical_command: str
+    kind: str
+    scope: str
+    status: str
+    exit_code: int
+    cwd: str
+    root: str
+    session_id: str
+    output_summary: str = ""
+
+
+def _utc_now() -> str:
+    return datetime.now(timezone.utc).isoformat()
+
+
+def _retention_cutoff() -> str:
+    return (datetime.now(timezone.utc) - timedelta(days=_MAX_EVIDENCE_AGE_DAYS)).isoformat()
+
+
+def _db_path() -> Path:
+    return get_hermes_home() / "verification_evidence.db"
+
+
+def _connect() -> sqlite3.Connection:
+    path = _db_path()
+    path.parent.mkdir(parents=True, exist_ok=True)
+    conn = sqlite3.connect(path)
+    conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA busy_timeout=5000")
+    conn.row_factory = sqlite3.Row
+    _ensure_schema(conn)
+    return conn
+
+
+def _ensure_schema(conn: sqlite3.Connection) -> None:
+    conn.execute(
+        """
+        CREATE TABLE IF NOT EXISTS meta (
+            key TEXT PRIMARY KEY,
+            value TEXT NOT NULL
+        )
+        """
+    )
+    conn.execute(
+        """
+        CREATE TABLE IF NOT EXISTS verification_events (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            created_at TEXT NOT NULL,
+            session_id TEXT NOT NULL,
+            cwd TEXT NOT NULL,
+            root TEXT NOT NULL,
+            command TEXT NOT NULL,
+            canonical_command TEXT NOT NULL,
+            kind TEXT NOT NULL,
+            scope TEXT NOT NULL,
+            status TEXT NOT NULL,
+            exit_code INTEGER NOT NULL,
+            output_summary TEXT NOT NULL
+        )
+        """
+    )
+    conn.execute(
+        """
+        CREATE TABLE IF NOT EXISTS verification_state (
+            session_id TEXT NOT NULL,
+            root TEXT NOT NULL,
+            last_event_id INTEGER,
+            last_edit_at TEXT,
+            changed_paths_json TEXT NOT NULL DEFAULT '[]',
+            PRIMARY KEY (session_id, root)
+        )
+        """
+    )
+    conn.execute(
+        """
+        CREATE INDEX IF NOT EXISTS idx_verification_events_session_root
+        ON verification_events(session_id, root, id DESC)
+        """
+    )
+    conn.execute(
+        "INSERT OR REPLACE INTO meta(key, value) VALUES ('schema_version', ?)",
+        (str(_VERIFY_SCHEMA_VERSION),),
+    )
+    conn.commit()
+
+
+def _split_segment_tokens(command: str) -> list[list[str]]:
+    segments: list[list[str]] = []
+    for segment in _SHELL_SPLIT_RE.split(command.strip()):
+        if not segment:
+            continue
+        try:
+            tokens = shlex.split(segment)
+        except ValueError:
+            continue
+        if tokens:
+            segments.append(tokens)
+    return segments
+
+
+def _clean_token(token: str) -> str:
+    token = token.strip()
+    while token.startswith("./"):
+        token = token[2:]
+    return token
+
+
+def _canonical_tokens(canonical: str) -> list[str]:
+    try:
+        return [_clean_token(t) for t in shlex.split(canonical) if t]
+    except ValueError:
+        return []
+
+
+def _find_subsequence(tokens: list[str], needle: list[str]) -> Optional[int]:
+    if not tokens or not needle or len(needle) > len(tokens):
+        return None
+    cleaned = [_clean_token(t) for t in tokens]
+    for idx in range(0, len(cleaned) - len(needle) + 1):
+        if cleaned[idx:idx + len(needle)] == needle:
+            return idx
+    return None
+
+
+def _strip_command_prefix(tokens: list[str]) -> list[str]:
+    """Remove harmless command prefixes before matching canonical commands."""
+    remaining = list(tokens)
+    if remaining and remaining[0] == "env":
+        remaining = remaining[1:]
+    while remaining and "=" in remaining[0] and not remaining[0].startswith("-"):
+        remaining = remaining[1:]
+    while remaining and remaining[0] in {"command", "time", "noglob"}:
+        remaining = remaining[1:]
+    return remaining
+
+
+def _equivalent_needles(needle: list[str]) -> list[list[str]]:
+    """Return command spellings equivalent to the detected canonical command."""
+    candidates = [needle]
+    if len(needle) >= 3 and needle[1] == "run":
+        package_manager = needle[0]
+        script_name = needle[2]
+        if package_manager in {"npm", "pnpm", "yarn", "bun"}:
+            candidates.append([package_manager, script_name])
+    if len(needle) == 1 and "/" in needle[0]:
+        candidates.extend([["bash", needle[0]], ["sh", needle[0]]])
+    if needle == ["pytest"]:
+        candidates.extend(
+            [
+                ["python", "-m", "pytest"],
+                ["python3", "-m", "pytest"],
+                ["uv", "run", "pytest"],
+                ["poetry", "run", "pytest"],
+                ["pipenv", "run", "pytest"],
+            ]
+        )
+    return candidates
+
+
+def _find_canonical_match(command: str, canonical_commands: list[str]) -> Optional[tuple[str, list[str]]]:
+    """Return ``(canonical, trailing_args)`` for the first detected command."""
+
+    segments = _split_segment_tokens(command)
+    for canonical in canonical_commands:
+        needle = _canonical_tokens(canonical)
+        if not needle:
+            continue
+        for tokens in segments:
+            candidate_tokens = _strip_command_prefix(tokens)
+            for candidate in _equivalent_needles(needle):
+                if candidate_tokens[:len(candidate)] == candidate:
+                    return canonical, candidate_tokens[len(candidate):]
+    return None
+
+
+def _kind_for_command(canonical: str) -> str:
+    lowered = canonical.lower()
+    if any(word in lowered for word in ("lint", "eslint", "ruff")):
+        return "lint"
+    if any(word in lowered for word in ("typecheck", "tsc", "mypy", "pyright", "ty")):
+        return "typecheck"
+    if "build" in lowered:
+        return "build"
+    if "fmt" in lowered or "format" in lowered:
+        return "format"
+    if "check" in lowered and "test" not in lowered:
+        return "check"
+    return "test"
+
+
+def _looks_like_target(arg: str) -> bool:
+    if not arg or arg.startswith("-") or "=" in arg:
+        return False
+    return (
+        "/" in arg
+        or "\\" in arg
+        or "::" in arg
+        or arg.endswith((".py", ".js", ".jsx", ".ts", ".tsx", ".rs", ".go", ".java"))
+        or arg.startswith(("test_", "tests", "spec", "__tests__"))
+    )
+
+
+def _scope_for_args(args: list[str]) -> str:
+    return "targeted" if any(_looks_like_target(arg) for arg in args) else "full"
+
+
+def _is_under_temp_dir(token: str) -> bool:
+    if not token or token.startswith("-"):
+        return False
+    try:
+        path = Path(token).expanduser()
+        if not path.is_absolute():
+            return False
+        resolved = path.resolve()
+        temp_root = Path(tempfile.gettempdir()).resolve()
+        return resolved == temp_root or temp_root in resolved.parents
+    except Exception:
+        return False
+
+
+def _is_under_root(token: str, root: str | Path | None) -> bool:
+    if not root:
+        return False
+    try:
+        path = Path(token).expanduser().resolve()
+        root_path = Path(root).expanduser().resolve()
+        return path == root_path or root_path in path.parents
+    except Exception:
+        return False
+
+
+def _is_temp_script_path(token: str, root: str | Path | None) -> bool:
+    try:
+        name = Path(token).expanduser().name
+    except Exception:
+        return False
+    return (
+        name.startswith(_AD_HOC_SCRIPT_NAME_PREFIXES)
+        and _is_under_temp_dir(token)
+        and not _is_under_root(token, root)
+    )
+
+
+def _ad_hoc_script_args(tokens: list[str], root: str | Path | None) -> Optional[list[str]]:
+    candidate_tokens = _strip_command_prefix(tokens)
+    if not candidate_tokens:
+        return None
+    command = candidate_tokens[0]
+    if _is_temp_script_path(command, root):
+        return candidate_tokens[1:]
+    if command in {"python", "python3", "node", "bash", "sh", "ruby", "perl"}:
+        for idx, token in enumerate(candidate_tokens[1:], start=1):
+            if token == "--":
+                continue
+            if _is_temp_script_path(token, root):
+                return candidate_tokens[idx + 1:]
+            if not token.startswith("-"):
+                return None
+    return None
+
+
+def _find_ad_hoc_match(command: str, root: str | Path | None) -> Optional[list[str]]:
+    for tokens in _split_segment_tokens(command):
+        trailing_args = _ad_hoc_script_args(tokens, root)
+        if trailing_args is not None:
+            return trailing_args
+    return None
+
+
+def _summarize_output(output: str) -> str:
+    text = (output or "").strip()
+    if len(text) <= _MAX_OUTPUT_SUMMARY_CHARS:
+        return text
+    head = _MAX_OUTPUT_SUMMARY_CHARS // 3
+    tail = _MAX_OUTPUT_SUMMARY_CHARS - head
+    return (
+        text[:head]
+        + f"\n... [{len(text) - _MAX_OUTPUT_SUMMARY_CHARS} chars omitted] ...\n"
+        + text[-tail:]
+    )
+
+
+def _prune_old_events(conn: sqlite3.Connection, *, session_id: str, root: str) -> None:
+    """Bound ledger growth without deleting the current state pointer."""
+    cutoff = _retention_cutoff()
+    conn.execute(
+        """
+        DELETE FROM verification_events
+        WHERE session_id = ?
+          AND root = ?
+          AND id NOT IN (
+              SELECT id FROM verification_events
+              WHERE session_id = ? AND root = ?
+              ORDER BY id DESC
+              LIMIT ?
+          )
+        """,
+        (session_id, root, session_id, root, _MAX_EVENTS_PER_SESSION_ROOT),
+    )
+    conn.execute(
+        """
+        DELETE FROM verification_state
+        WHERE (
+            last_edit_at IS NOT NULL
+            AND last_edit_at < ?
+        )
+        OR (
+            last_edit_at IS NULL
+            AND last_event_id IN (
+                SELECT id FROM verification_events
+                WHERE created_at < ?
+            )
+        )
+        """,
+        (cutoff, cutoff),
+    )
+    conn.execute(
+        """
+        DELETE FROM verification_events
+        WHERE created_at < ?
+          AND id NOT IN (
+              SELECT last_event_id FROM verification_state
+              WHERE last_event_id IS NOT NULL
+          )
+        """,
+        (cutoff,),
+    )
+    conn.execute(
+        """
+        DELETE FROM verification_events
+        WHERE id NOT IN (
+            SELECT id FROM verification_events
+            ORDER BY id DESC
+            LIMIT ?
+        )
+          AND id NOT IN (
+              SELECT last_event_id FROM verification_state
+              WHERE last_event_id IS NOT NULL
+          )
+        """,
+        (_MAX_TOTAL_UNREFERENCED_EVENTS,),
+    )
+
+
+def classify_verification_command(
+    command: str,
+    *,
+    cwd: str | Path | None = None,
+    session_id: str | None = None,
+    exit_code: int = 0,
+    output: str = "",
+) -> Optional[VerificationEvidence]:
+    """Classify a terminal command as verification evidence, if applicable."""
+
+    if not command or not isinstance(command, str):
+        return None
+    try:
+        from agent.coding_context import project_facts_for
+
+        facts = project_facts_for(cwd)
+    except Exception:
+        facts = None
+    if not facts:
+        return None
+
+    verify_commands = list(facts.get("verifyCommands") or [])
+    match = _find_canonical_match(command, verify_commands)
+    is_ad_hoc = False
+    if match is None and not verify_commands:
+        ad_hoc_args = _find_ad_hoc_match(command, facts.get("root"))
+        if ad_hoc_args is not None:
+            match = ("ad-hoc verification script", ad_hoc_args)
+            is_ad_hoc = True
+    if match is None:
+        return None
+
+    canonical, trailing_args = match
+    return VerificationEvidence(
+        command=command,
+        canonical_command=canonical,
+        kind="ad_hoc" if is_ad_hoc else _kind_for_command(canonical),
+        scope="targeted" if is_ad_hoc else _scope_for_args(trailing_args),
+        status="passed" if int(exit_code) == 0 else "failed",
+        exit_code=int(exit_code),
+        cwd=str(Path(cwd or ".").resolve()),
+        root=str(facts.get("root") or Path(cwd or ".").resolve()),
+        session_id=str(session_id or "default"),
+        output_summary=_summarize_output(output),
+    )
+
+
+def record_terminal_result(
+    *,
+    command: str,
+    cwd: str | Path | None,
+    session_id: str | None,
+    exit_code: int,
+    output: str = "",
+) -> Optional[dict[str, Any]]:
+    """Record a foreground terminal result when it is verification evidence."""
+
+    evidence = classify_verification_command(
+        command,
+        cwd=cwd,
+        session_id=session_id,
+        exit_code=exit_code,
+        output=output,
+    )
+    if evidence is None:
+        return None
+
+    created_at = _utc_now()
+    with _DB_LOCK:
+        with _connect() as conn:
+            cur = conn.execute(
+                """
+                INSERT INTO verification_events(
+                    created_at, session_id, cwd, root, command, canonical_command,
+                    kind, scope, status, exit_code, output_summary
+                ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                """,
+                (
+                    created_at,
+                    evidence.session_id,
+                    evidence.cwd,
+                    evidence.root,
+                    evidence.command,
+                    evidence.canonical_command,
+                    evidence.kind,
+                    evidence.scope,
+                    evidence.status,
+                    evidence.exit_code,
+                    evidence.output_summary,
+                ),
+            )
+            if cur.lastrowid is None:
+                raise RuntimeError("verification event insert did not return an id")
+            event_id = int(cur.lastrowid)
+            conn.execute(
+                """
+                INSERT INTO verification_state(
+                    session_id, root, last_event_id, last_edit_at, changed_paths_json
+                ) VALUES (?, ?, ?, NULL, '[]')
+                ON CONFLICT(session_id, root) DO UPDATE SET
+                    last_event_id = excluded.last_event_id,
+                    last_edit_at = NULL,
+                    changed_paths_json = '[]'
+                """,
+                (evidence.session_id, evidence.root, event_id),
+            )
+            _prune_old_events(conn, session_id=evidence.session_id, root=evidence.root)
+            conn.commit()
+
+    return {"id": event_id, **evidence.__dict__, "created_at": created_at}
+
+
+def mark_workspace_edited(
+    *,
+    session_id: str | None,
+    cwd: str | Path | None,
+    paths: list[str] | tuple[str, ...] | None = None,
+) -> Optional[dict[str, Any]]:
+    """Mark verification evidence stale after a successful file edit."""
+
+    try:
+        from agent.coding_context import project_facts_for
+
+        facts = project_facts_for(cwd)
+    except Exception:
+        facts = None
+    if not facts:
+        return None
+
+    sid = str(session_id or "default")
+    root = str(facts.get("root") or Path(cwd or ".").resolve())
+    changed_paths = sorted({str(p) for p in (paths or []) if p})
+    edited_at = _utc_now()
+
+    with _DB_LOCK:
+        with _connect() as conn:
+            row = conn.execute(
+                """
+                SELECT changed_paths_json FROM verification_state
+                WHERE session_id = ? AND root = ?
+                """,
+                (sid, root),
+            ).fetchone()
+            existing: set[str] = set()
+            if row is not None:
+                try:
+                    existing = set(json.loads(row["changed_paths_json"] or "[]"))
+                except (TypeError, ValueError):
+                    existing = set()
+            merged = sorted((existing | set(changed_paths)))[-200:]
+            conn.execute(
+                """
+                INSERT INTO verification_state(
+                    session_id, root, last_event_id, last_edit_at, changed_paths_json
+                ) VALUES (?, ?, NULL, ?, ?)
+                ON CONFLICT(session_id, root) DO UPDATE SET
+                    last_edit_at = excluded.last_edit_at,
+                    changed_paths_json = excluded.changed_paths_json
+                """,
+                (sid, root, edited_at, json.dumps(merged)),
+            )
+            conn.commit()
+
+    return {"session_id": sid, "root": root, "last_edit_at": edited_at, "changed_paths": changed_paths}
+
+
+def verification_status(
+    *,
+    session_id: str | None,
+    cwd: str | Path | None,
+) -> dict[str, Any]:
+    """Return the best known verification state for a session/workspace."""
+
+    try:
+        from agent.coding_context import project_facts_for
+
+        facts = project_facts_for(cwd)
+    except Exception:
+        facts = None
+    if not facts:
+        return {"status": "not_applicable", "evidence": None}
+
+    sid = str(session_id or "default")
+    root = str(facts.get("root") or Path(cwd or ".").resolve())
+    with _DB_LOCK:
+        with _connect() as conn:
+            state = conn.execute(
+                """
+                SELECT last_event_id, last_edit_at, changed_paths_json
+                FROM verification_state
+                WHERE session_id = ? AND root = ?
+                """,
+                (sid, root),
+            ).fetchone()
+            if state is None:
+                return {
+                    "status": "unverified",
+                    "evidence": None,
+                    "root": root,
+                    "session_id": sid,
+                    "changed_paths": [],
+                }
+            event = None
+            if state["last_event_id"] is not None:
+                event = conn.execute(
+                    "SELECT * FROM verification_events WHERE id = ?",
+                    (state["last_event_id"],),
+                ).fetchone()
+
+    changed_paths: list[str] = []
+    try:
+        changed_paths = json.loads(state["changed_paths_json"] or "[]")
+    except (TypeError, ValueError):
+        changed_paths = []
+
+    if event is None:
+        return {
+            "status": "unverified",
+            "evidence": None,
+            "root": root,
+            "session_id": sid,
+            "changed_paths": changed_paths,
+        }
+
+    evidence = dict(event)
+    if state["last_edit_at"] and state["last_edit_at"] > evidence["created_at"]:
+        status = "stale"
+    else:
+        status = evidence["status"]
+    return {
+        "status": status,
+        "evidence": evidence,
+        "root": root,
+        "session_id": sid,
+        "changed_paths": changed_paths,
+    }

agent/verification_stop.py

@@ -0,0 +1,164 @@
+"""Turn-end verification guard for coding edits.
+
+This module is intentionally policy-only. It never runs checks itself; it turns
+the passive verification ledger into a bounded follow-up when the model tries to
+finish immediately after editing code without fresh evidence.
+"""
+
+from __future__ import annotations
+
+import os
+import tempfile
+from pathlib import Path
+from typing import Any, Iterable
+
+
+_MAX_CHANGED_PATHS_IN_NUDGE = 8
+
+
+def verify_on_stop_enabled(config: dict[str, Any] | None = None) -> bool:
+    """Return whether edit -> verify-before-finish behavior is enabled."""
+    env = os.environ.get("HERMES_VERIFY_ON_STOP")
+    if env is not None:
+        return env.strip().lower() not in {"0", "false", "no", "off"}
+    if config is None:
+        try:
+            from hermes_cli.config import load_config
+
+            config = load_config()
+        except Exception:
+            config = {}
+    agent_cfg = (config or {}).get("agent") if isinstance(config, dict) else None
+    if isinstance(agent_cfg, dict) and "verify_on_stop" in agent_cfg:
+        return bool(agent_cfg.get("verify_on_stop"))
+    return True
+
+
+def _candidate_cwds(paths: Iterable[str]) -> list[Path]:
+    candidates: list[Path] = []
+    seen: set[str] = set()
+    for raw in paths:
+        if not raw:
+            continue
+        try:
+            path = Path(raw).expanduser()
+            candidate = path if path.is_dir() else path.parent
+            resolved = str(candidate.resolve())
+        except Exception:
+            continue
+        if resolved not in seen:
+            seen.add(resolved)
+            candidates.append(Path(resolved))
+    return candidates
+
+
+def _verification_snapshot(
+    *,
+    session_id: str | None,
+    changed_paths: list[str],
+) -> tuple[dict[str, Any], dict[str, Any]] | None:
+    """Return ``(status, facts)`` for the first edited workspace needing proof."""
+    try:
+        from agent.coding_context import project_facts_for
+        from agent.verification_evidence import verification_status
+    except Exception:
+        return None
+
+    first_snapshot: tuple[dict[str, Any], dict[str, Any]] | None = None
+    for cwd in _candidate_cwds(changed_paths):
+        facts = project_facts_for(cwd)
+        if not facts:
+            continue
+        status = verification_status(session_id=session_id, cwd=cwd)
+        snapshot = (status, facts)
+        if first_snapshot is None:
+            first_snapshot = snapshot
+        if str(status.get("status") or "unverified") != "passed":
+            return snapshot
+    return first_snapshot
+
+
+def _format_changed_paths(paths: list[str]) -> str:
+    shown = paths[:_MAX_CHANGED_PATHS_IN_NUDGE]
+    lines = [f"- `{path}`" for path in shown]
+    remaining = len(paths) - len(shown)
+    if remaining > 0:
+        lines.append(f"- ... and {remaining} more")
+    return "\n".join(lines)
+
+
+def _status_detail(status: dict[str, Any]) -> str:
+    state = str(status.get("status") or "unverified")
+    evidence = status.get("evidence") if isinstance(status.get("evidence"), dict) else None
+    if not evidence:
+        return state
+
+    command = evidence.get("canonical_command") or evidence.get("command")
+    summary = str(evidence.get("output_summary") or "").strip()
+    parts = [state]
+    if command:
+        parts.append(f"last command `{command}`")
+    if summary:
+        max_summary = 1200
+        if len(summary) > max_summary:
+            summary = summary[:max_summary].rstrip() + "\n... [truncated]"
+        parts.append(f"last output:\n{summary}")
+    return "\n".join(parts)
+
+
+def build_verify_on_stop_nudge(
+    *,
+    session_id: str | None,
+    changed_paths: Iterable[str],
+    attempts: int = 0,
+    max_attempts: int = 2,
+) -> str | None:
+    """Return a synthetic follow-up when edited code lacks fresh verification."""
+    paths = sorted({str(p) for p in changed_paths if p})
+    if not paths or attempts >= max_attempts:
+        return None
+
+    snapshot = _verification_snapshot(session_id=session_id, changed_paths=paths)
+    if snapshot is None:
+        return None
+    status, facts = snapshot
+
+    verify_commands = [
+        str(cmd).strip()
+        for cmd in (facts.get("verifyCommands") or [])
+        if str(cmd).strip()
+    ]
+
+    state = str(status.get("status") or "unverified")
+    if state == "passed":
+        return None
+
+    if verify_commands:
+        command_instruction = (
+            "Run the relevant verification command now ("
+            + ", ".join(f"`{cmd}`" for cmd in verify_commands[:3])
+            + (", ..." if len(verify_commands) > 3 else "")
+            + "), read any failure, repair the code, and summarize what passed."
+        )
+    else:
+        temp_dir = tempfile.gettempdir()
+        command_instruction = (
+            "No canonical test/lint/build command was detected. Create a focused "
+            f"temporary verification script under `{temp_dir}` using an OS-safe "
+            "`tempfile` path with a `hermes-verify-` filename prefix, run it "
+            "against the changed behavior, clean it up when possible, and "
+            "summarize it explicitly as ad-hoc verification rather than suite "
+            "green."
+        )
+
+    return (
+        "[System: You edited code in this turn, but the workspace does not have "
+        "fresh passing verification evidence yet.\n\n"
+        f"Verification status: {_status_detail(status)}\n\n"
+        f"Changed paths:\n{_format_changed_paths(paths)}\n\n"
+        f"{command_instruction} If verification is not possible, explain the "
+        "concrete blocker instead of claiming the work is fully verified.]"
+    )
+
+
+__all__ = ["build_verify_on_stop_nudge", "verify_on_stop_enabled"]

apps/desktop/components.json

@@ -17,5 +17,5 @@
     "lib": "@/lib",
     "hooks": "@/hooks"
   },
-  "iconLibrary": "lucide"
+  "iconLibrary": "tabler"
 }

apps/desktop/electron/git-repo-scan.cjs

@@ -0,0 +1,98 @@
+'use strict'
+
+// Repo-first discovery: walk bounded roots for git repos using only Node's `fs`
+// — no native addon, so it just works for anyone who pulls main (no
+// electron-rebuild). Mirrors how GitHub Desktop scans: stop at the first `.git`
+// (don't descend into a repo), cap depth, and skip heavy non-repo trees so the
+// first scan stays fast. Results are cached by the backend after the first run.
+
+const fs = require('node:fs')
+const os = require('node:os')
+const path = require('node:path')
+
+const fsp = fs.promises
+
+// Shallow on purpose: real projects live a few levels under home
+// (`~/www/repo`, `~/code/org/repo`); deeper `.git` dirs are almost always
+// fixtures/vendored/eval checkouts (e.g. `~/www/ha-evals/tasks/*/repo`). Repos
+// you actually use but keep deeper still surface via session-derived discovery,
+// so this only prunes noise, never repos with history.
+const DEFAULT_MAX_DEPTH = 3
+const MAX_CONCURRENCY = 32
+
+// Big trees that are never themselves repos and would waste the walk. Anything
+// hidden (dotdirs like .cache/.Trash/.npm) is skipped wholesale below, so this
+// only needs the non-hidden heavyweights.
+const JUNK_DIRS = new Set(['Applications', 'Library', 'node_modules', 'site-packages', 'vendor', 'venv'])
+
+async function mapLimit(items, limit, fn) {
+  let cursor = 0
+
+  async function worker() {
+    while (cursor < items.length) {
+      const index = cursor
+      cursor += 1
+      await fn(items[index])
+    }
+  }
+
+  await Promise.all(Array.from({ length: Math.min(limit, items.length) }, worker))
+}
+
+/**
+ * Scan `roots` (default: the home dir) for git repositories. Returns deduped
+ * `{ root, label }` entries. `options.maxDepth` caps recursion (default 3).
+ */
+async function scanGitRepos(roots, options = {}) {
+  const maxDepth = Number(options.maxDepth) || DEFAULT_MAX_DEPTH
+  const searchRoots = Array.isArray(roots) && roots.length > 0 ? roots : [os.homedir()]
+  const found = new Map()
+
+  async function walk(dir, depth) {
+    if (depth > maxDepth) {
+      return
+    }
+
+    let entries
+    try {
+      entries = await fsp.readdir(dir, { withFileTypes: true })
+    } catch {
+      return // unreadable / permission denied
+    }
+
+    // A `.git` DIRECTORY marks a real repo root (a main checkout). A `.git`
+    // FILE is a linked worktree or submodule — those belong to their parent
+    // repo as lanes, not as separate projects, so we don't list them (and we
+    // keep descending in case a real repo sits deeper). This is what kills the
+    // worktree/eval-repo duplicate explosion.
+    if (entries.some(entry => entry.name === '.git' && entry.isDirectory())) {
+      const root = dir.replace(/[/\\]+$/, '')
+      found.set(root, path.basename(root) || root)
+
+      return
+    }
+
+    const subdirs = []
+    for (const entry of entries) {
+      // Real directories only (skip symlinks to avoid loops), no hidden dirs, no
+      // known heavy trees.
+      if (!entry.isDirectory() || entry.name.startsWith('.') || JUNK_DIRS.has(entry.name)) {
+        continue
+      }
+
+      subdirs.push(path.join(dir, entry.name))
+    }
+
+    await mapLimit(subdirs, MAX_CONCURRENCY, sub => walk(sub, depth + 1))
+  }
+
+  await mapLimit(
+    searchRoots.map(root => String(root || '').trim()).filter(Boolean),
+    MAX_CONCURRENCY,
+    root => walk(root, 0)
+  )
+
+  return [...found.entries()].map(([root, label]) => ({ label, root }))
+}
+
+module.exports = { scanGitRepos }

apps/desktop/electron/git-review-ops.cjs

@@ -0,0 +1,679 @@
+'use strict'
+
+// Git ops backing the coding rail + Codex-style review pane. Built on `simple-git`
+// (a maintained wrapper around the system git binary — same git the rest of the
+// app shells to, no native build) so we read structured status()/diffSummary()
+// results instead of hand-parsing porcelain. Reads degrade to null/empty on a
+// non-repo / remote backend; mutations reject so the renderer can toast.
+
+const { execFile } = require('node:child_process')
+const fs = require('node:fs/promises')
+const path = require('node:path')
+
+const simpleGit = require('simple-git')
+
+const { resolveRequestedPathForIpc } = require('./hardening.cjs')
+
+const COMMIT_CONTEXT_DIFF_MAX_CHARS = 120_000
+const COMMIT_CONTEXT_UNTRACKED_MAX = 80
+const UNTRACKED_LINE_COUNT_CONCURRENCY = 16
+const UNTRACKED_LINE_COUNT_MAX_BYTES = 1024 * 1024
+
+// GUI-launched Electron apps on macOS inherit only a minimal PATH (no
+// /opt/homebrew/bin or /usr/local/bin), so `gh` — and the `git` gh shells out
+// to — aren't found. Augment PATH with the resolved gh dir + the common
+// package-manager bins so gh runs the same way it does in a terminal.
+function ghEnv(ghBin) {
+  const extra = [ghBin ? path.dirname(ghBin) : '', '/opt/homebrew/bin', '/usr/local/bin', '/usr/bin'].filter(
+    dir => dir && dir !== '.'
+  )
+
+  return { ...process.env, PATH: [...extra, process.env.PATH].filter(Boolean).join(path.delimiter) }
+}
+
+// Run the `gh` CLI in a repo. Resolves { ok, stdout } so callers branch on
+// availability/auth without a throw. gh missing/unauthed → ok:false.
+function runGh(args, cwd, ghBin) {
+  return new Promise(resolve => {
+    execFile(
+      ghBin || 'gh',
+      args,
+      { cwd, env: ghEnv(ghBin), windowsHide: true, timeout: 30_000, maxBuffer: 8 * 1024 * 1024 },
+      (err, stdout) => resolve({ ok: !err, stdout: String(stdout || '') })
+    )
+  })
+}
+
+function gitFor(cwd, gitBin) {
+  return simpleGit({ baseDir: cwd, binary: gitBin || 'git', maxConcurrentProcesses: 4, trimmed: false })
+}
+
+// simple-git reports renames as `old => new` (and `dir/{old => new}/f`); resolve
+// to the NEW path so the row addresses the real file for diff/stage.
+function resolveRenamePath(raw) {
+  const path = String(raw || '').trim()
+
+  if (!path.includes(' => ')) {
+    return path
+  }
+
+  const brace = path.match(/^(.*)\{(.*) => (.*)\}(.*)$/)
+
+  if (brace) {
+    const [, prefix, , to, suffix] = brace
+
+    return `${prefix}${to}${suffix}`.replace(/\/{2,}/g, '/')
+  }
+
+  return path.split(' => ').pop().trim()
+}
+
+// DiffResult.files → Map<path, {added, removed}> (binary files carry no line
+// delta).
+function countsByPath(summary) {
+  const map = new Map()
+
+  for (const file of summary.files) {
+    map.set(resolveRenamePath(file.file), {
+      added: file.binary ? 0 : file.insertions,
+      removed: file.binary ? 0 : file.deletions
+    })
+  }
+
+  return map
+}
+
+// Untracked files don't appear in diffSummary(); count insertions from disk so
+// the review tree can show +N for new files (matches an all-add diff view).
+// Insertions = line count: newline bytes, plus one for a final unterminated
+// line. Binary (NUL byte) → 0, mirroring git numstat's "-".
+async function untrackedInsertions(cwd, relPath) {
+  try {
+    const fullPath = path.join(cwd, relPath)
+    const stat = await fs.stat(fullPath)
+
+    if (!stat.isFile() || stat.size > UNTRACKED_LINE_COUNT_MAX_BYTES) {
+      return 0
+    }
+
+    const buf = await fs.readFile(fullPath)
+
+    if (buf.includes(0)) {
+      return 0
+    }
+
+    let lines = 0
+
+    for (const byte of buf) {
+      if (byte === 10) {
+        lines++
+      }
+    }
+
+    return buf.length > 0 && buf[buf.length - 1] !== 10 ? lines + 1 : lines
+  } catch {
+    return 0
+  }
+}
+
+function capText(text, maxChars, label = 'truncated') {
+  const value = String(text || '')
+
+  if (value.length <= maxChars) {
+    return value
+  }
+
+  return `${value.slice(0, maxChars)}\n# ${label}: ${value.length - maxChars} chars omitted\n`
+}
+
+async function fillUntrackedCounts(cwd, files) {
+  const pending = files.filter(file => file.status === '?' && file.added === 0 && file.removed === 0)
+
+  for (let i = 0; i < pending.length; i += UNTRACKED_LINE_COUNT_CONCURRENCY) {
+    await Promise.all(
+      pending.slice(i, i + UNTRACKED_LINE_COUNT_CONCURRENCY).map(async file => {
+        file.added = await untrackedInsertions(cwd, file.path)
+      })
+    )
+  }
+}
+
+// Resolve the base ref for "all branch changes": merge-base with the remote
+// default branch (origin/HEAD), falling back to common trunk names.
+async function branchBase(git) {
+  const candidates = []
+
+  try {
+    const head = (await git.revparse(['--abbrev-ref', 'origin/HEAD'])).trim()
+
+    if (head) {
+      candidates.push(head)
+    }
+  } catch {
+    // No origin/HEAD configured.
+  }
+
+  candidates.push('origin/main', 'origin/master', 'main', 'master')
+
+  for (const ref of candidates) {
+    try {
+      const base = (await git.raw(['merge-base', 'HEAD', ref])).trim()
+
+      if (base) {
+        return base
+      }
+    } catch {
+      // Ref doesn't exist; try the next candidate.
+    }
+  }
+
+  return null
+}
+
+// Resolve the repo's default branch NAME ("main" / "master" / …), preferring
+// the remote's HEAD, then common local trunk names. Null when none is found
+// (e.g. a fresh repo with only a feature branch). Used to offer "branch off the
+// trunk" regardless of which branch you're currently on.
+async function defaultBranchName(git) {
+  try {
+    const head = (await git.revparse(['--abbrev-ref', 'origin/HEAD'])).trim()
+
+    // "origin/main" → "main"; skip the bare "origin/HEAD" placeholder.
+    if (head && head !== 'origin/HEAD') {
+      return head.replace(/^origin\//, '')
+    }
+  } catch {
+    // No origin/HEAD configured.
+  }
+
+  // Prefer a local trunk, then a remote-only one (returns the clean name either
+  // way) so "branch off main" works even before main is checked out locally.
+  for (const ref of ['refs/heads/main', 'refs/heads/master', 'refs/remotes/origin/main', 'refs/remotes/origin/master']) {
+    try {
+      await git.raw(['rev-parse', '--verify', '--quiet', ref])
+
+      return ref.replace(/^refs\/(?:heads|remotes\/origin)\//, '')
+    } catch {
+      // Ref doesn't exist; try the next candidate.
+    }
+  }
+
+  return null
+}
+
+// A status file's single-letter classification, preferring the staged (index)
+// code over the worktree code; untracked wins (simple-git marks both '?').
+function statusLetter(file) {
+  if (file.index === '?' || file.working_dir === '?') {
+    return '?'
+  }
+
+  const code = file.index && file.index !== ' ' ? file.index : file.working_dir
+
+  return (code || 'M').toUpperCase()
+}
+
+const isStaged = file => Boolean(file.index && file.index !== ' ' && file.index !== '?')
+
+async function reviewList(repoPath, scope, baseRef, gitBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review list' })
+  } catch {
+    return { files: [], base: null }
+  }
+
+  const git = gitFor(cwd, gitBin)
+
+  try {
+    if (scope === 'branch' || scope === 'lastTurn') {
+      const base = scope === 'branch' ? await branchBase(git) : baseRef
+
+      if (!base) {
+        return { files: [], base: null }
+      }
+
+      const range = scope === 'branch' ? `${base}...HEAD` : base
+      const summary = await git.diffSummary([range])
+      const files = summary.files.map(file => ({
+        path: resolveRenamePath(file.file),
+        added: file.binary ? 0 : file.insertions,
+        removed: file.binary ? 0 : file.deletions,
+        status: 'M',
+        staged: false
+      }))
+
+      // "Last turn" also surfaces files created since the baseline (untracked).
+      if (scope === 'lastTurn') {
+        const status = await git.status()
+
+        for (const path of status.not_added) {
+          if (!files.some(f => f.path === path)) {
+            files.push({ path, added: 0, removed: 0, status: '?', staged: false })
+          }
+        }
+      }
+
+      files.sort((a, b) => a.path.localeCompare(b.path))
+      await fillUntrackedCounts(cwd, files)
+
+      return { files, base }
+    }
+
+    // Default: uncommitted (staged + unstaged + untracked), one row per path.
+    const [status, staged, unstaged] = await Promise.all([
+      git.status(),
+      git.diffSummary(['--cached']),
+      git.diffSummary([])
+    ])
+    const stagedCounts = countsByPath(staged)
+    const unstagedCounts = countsByPath(unstaged)
+
+    const files = status.files.map(file => {
+      const filePath = resolveRenamePath(file.path)
+      const sc = stagedCounts.get(filePath) || { added: 0, removed: 0 }
+      const uc = unstagedCounts.get(filePath) || { added: 0, removed: 0 }
+
+      return {
+        path: filePath,
+        added: sc.added + uc.added,
+        removed: sc.removed + uc.removed,
+        status: statusLetter(file),
+        staged: isStaged(file)
+      }
+    })
+
+    files.sort((a, b) => a.path.localeCompare(b.path))
+    await fillUntrackedCounts(cwd, files)
+
+    return { files, base: null }
+  } catch {
+    return { files: [], base: null }
+  }
+}
+
+async function reviewDiff(repoPath, filePath, scope, baseRef, staged, gitBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review diff' })
+  } catch {
+    return ''
+  }
+
+  const git = gitFor(cwd, gitBin)
+  const safe = args => git.diff(args).catch(() => '')
+
+  if (scope === 'branch') {
+    const base = await branchBase(git)
+
+    return base ? safe([`${base}...HEAD`, '--', filePath]) : ''
+  }
+
+  if (scope === 'lastTurn') {
+    return baseRef ? safe([baseRef, '--', filePath]) : ''
+  }
+
+  if (staged) {
+    return safe(['--cached', '--', filePath])
+  }
+
+  const worktree = await safe(['--', filePath])
+
+  if (worktree.trim()) {
+    return worktree
+  }
+
+  // Untracked file: no worktree diff exists, so synthesize an all-add diff via
+  // --no-index (exits non-zero by design when files differ, so go around
+  // simple-git's reject-on-nonzero with a raw execFile).
+  return new Promise(resolve => {
+    execFile(
+      gitBin || 'git',
+      ['diff', '--no-index', '--', '/dev/null', filePath],
+      { cwd, windowsHide: true, timeout: 30_000, maxBuffer: 32 * 1024 * 1024 },
+      (_err, stdout) => resolve(String(stdout || ''))
+    )
+  })
+}
+
+// Working-tree-vs-HEAD diff for ONE file — the "what changed since the last
+// commit" view used by the file preview. Unlike reviewDiff this never synthesizes
+// a full-add for a clean tracked file (so a pristine file shows no diff); it only
+// all-adds a genuinely untracked file.
+async function fileDiffVsHead(repoPath, filePath, gitBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'File diff' })
+  } catch {
+    return ''
+  }
+
+  const git = gitFor(cwd, gitBin)
+  const head = await git.diff(['HEAD', '--', filePath]).catch(() => '')
+
+  if (head.trim()) {
+    return head
+  }
+
+  // No tracked changes vs HEAD. Only synthesize an all-add diff for a file git
+  // doesn't know yet; a clean tracked file must return empty.
+  const status = await git.raw(['status', '--porcelain', '--', filePath]).catch(() => '')
+
+  if (!status.trim().startsWith('??')) {
+    return ''
+  }
+
+  return new Promise(resolve => {
+    execFile(
+      gitBin || 'git',
+      ['diff', '--no-index', '--', '/dev/null', filePath],
+      { cwd, windowsHide: true, timeout: 30_000, maxBuffer: 32 * 1024 * 1024 },
+      (_err, stdout) => resolve(String(stdout || ''))
+    )
+  })
+}
+
+async function reviewStage(repoPath, filePath, gitBin) {
+  const cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review stage' })
+
+  await gitFor(cwd, gitBin).raw(filePath ? ['add', '--', filePath] : ['add', '-A'])
+
+  return { ok: true }
+}
+
+async function reviewUnstage(repoPath, filePath, gitBin) {
+  const cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review unstage' })
+
+  await gitFor(cwd, gitBin).raw(filePath ? ['reset', '-q', 'HEAD', '--', filePath] : ['reset', '-q', 'HEAD'])
+
+  return { ok: true }
+}
+
+// Discard changes back to the committed state. Destructive — the renderer
+// confirms first. Restores tracked files and removes untracked ones.
+async function reviewRevert(repoPath, filePath, gitBin) {
+  const cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review revert' })
+  const git = gitFor(cwd, gitBin)
+
+  if (filePath) {
+    await git.raw(['checkout', 'HEAD', '--', filePath]).catch(() => undefined)
+    await git.raw(['clean', '-fd', '--', filePath]).catch(() => undefined)
+  } else {
+    await git.raw(['checkout', 'HEAD', '--', '.']).catch(() => undefined)
+    await git.raw(['clean', '-fd']).catch(() => undefined)
+  }
+
+  return { ok: true }
+}
+
+// Resolve a ref to a commit sha (captures the turn baseline for "Last turn").
+async function reviewRevParse(repoPath, ref, gitBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review rev-parse' })
+  } catch {
+    return null
+  }
+
+  try {
+    return (await gitFor(cwd, gitBin).revparse([ref || 'HEAD'])).trim() || null
+  } catch {
+    return null
+  }
+}
+
+// Commit the working tree. Mirrors VS Code: if nothing is staged, stage
+// everything first ("commit all"), then commit. Optionally push afterward,
+// setting upstream on the first push.
+async function reviewCommit(repoPath, message, push, gitBin) {
+  const cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review commit' })
+  const git = gitFor(cwd, gitBin)
+  const status = await git.status()
+
+  if (status.staged.length === 0) {
+    await git.raw(['add', '-A'])
+  }
+
+  await git.commit(message)
+
+  if (push) {
+    const fresh = await git.status()
+
+    if (fresh.tracking) {
+      await git.push()
+    } else if (fresh.current) {
+      await git.raw(['push', '-u', 'origin', fresh.current])
+    }
+  }
+
+  return { ok: true }
+}
+
+// Gather the context the model needs to draft a commit message: the diff of
+// what *will* be committed (staged when anything is staged, else everything
+// vs HEAD — mirroring reviewCommit's "stage all when nothing staged" rule),
+// the names of untracked files (which carry no diff), and recent commit
+// subjects for style. Diff is capped so the payload stays bounded. Reads only.
+async function reviewCommitContext(repoPath, gitBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review commit context' })
+  } catch {
+    return { diff: '', recent: '' }
+  }
+
+  const git = gitFor(cwd, gitBin)
+  const safe = args => git.diff(args).catch(() => '')
+
+  let status
+  try {
+    status = await git.status()
+  } catch {
+    return { diff: '', recent: '' }
+  }
+
+  // What will land: staged changes if any, otherwise all tracked changes vs HEAD.
+  let diff = capText(
+    status.staged.length > 0 ? await safe(['--cached']) : await safe(['HEAD']),
+    COMMIT_CONTEXT_DIFF_MAX_CHARS,
+    'diff truncated for commit-message generation'
+  )
+
+  // Untracked files have no diff — list them so new files aren't invisible.
+  const untracked = status.not_added || []
+  if (untracked.length > 0) {
+    const visible = untracked.slice(0, COMMIT_CONTEXT_UNTRACKED_MAX)
+    const omitted = untracked.length - visible.length
+    const note =
+      `\n# New (untracked) files:\n${visible.map(p => `#   ${p}`).join('\n')}\n` +
+      (omitted > 0 ? `#   ... ${omitted} more omitted\n` : '')
+
+    diff = diff ? `${diff}${note}` : note
+  }
+
+  const recent = await git.raw(['log', '-n', '10', '--pretty=format:%s']).catch(() => '')
+
+  return { diff: diff || '', recent: String(recent || '').trim() }
+}
+
+async function reviewPush(repoPath, gitBin) {
+  const cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review push' })
+  const git = gitFor(cwd, gitBin)
+  const status = await git.status()
+
+  if (status.tracking) {
+    await git.push()
+  } else if (status.current) {
+    await git.raw(['push', '-u', 'origin', status.current])
+  }
+
+  return { ok: true }
+}
+
+// gh availability + auth + whether this branch already has a PR. Reads only;
+// drives the PR button's enabled/label state. `ghReady` is false when gh is
+// missing OR not authenticated — either way the PR action can't run.
+async function reviewShipInfo(repoPath, ghBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review ship info' })
+  } catch {
+    return { ghReady: false, pr: null }
+  }
+
+  const auth = await runGh(['auth', 'status'], cwd, ghBin)
+
+  if (!auth.ok) {
+    return { ghReady: false, pr: null }
+  }
+
+  const view = await runGh(['pr', 'view', '--json', 'url,state,number'], cwd, ghBin)
+
+  if (!view.ok) {
+    // gh exits non-zero when no PR exists for the branch — that's not an error.
+    return { ghReady: true, pr: null }
+  }
+
+  try {
+    const pr = JSON.parse(view.stdout)
+
+    return { ghReady: true, pr: pr && pr.url ? { url: pr.url, state: pr.state, number: pr.number } : null }
+  } catch {
+    return { ghReady: true, pr: null }
+  }
+}
+
+// Create a PR for the current branch (pushing first so gh has a remote ref),
+// letting gh fill title/body from the commits. Returns the new PR url.
+async function reviewCreatePr(repoPath, gitBin, ghBin) {
+  const cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Review create PR' })
+
+  await reviewPush(repoPath, gitBin).catch(() => undefined)
+
+  const created = await runGh(['pr', 'create', '--fill'], cwd, ghBin)
+
+  if (!created.ok) {
+    throw new Error('gh pr create failed (is gh installed and authenticated?)')
+  }
+
+  const url = created.stdout.trim().split('\n').filter(Boolean).pop() || ''
+
+  return { url }
+}
+
+// Compact working-tree status for the composer coding rail: branch, ahead/behind,
+// per-state change counts, +/- vs HEAD, and a capped changed-file list.
+async function repoStatus(repoPath, gitBin) {
+  let cwd
+
+  try {
+    cwd = resolveRequestedPathForIpc(repoPath, { purpose: 'Repo status' })
+  } catch {
+    return null
+  }
+
+  // Session cwds can point at a deleted worktree for a moment (or forever in a
+  // stale row). simple-git throws at construction time on a missing baseDir, so
+  // fail soft and hide the coding rail instead of spamming IPC handler errors.
+  try {
+    const stat = await fs.stat(cwd)
+    if (!stat.isDirectory()) {
+      return null
+    }
+  } catch {
+    return null
+  }
+
+  let git
+  try {
+    git = gitFor(cwd, gitBin)
+  } catch {
+    return null
+  }
+  let status
+
+  try {
+    status = await git.status()
+  } catch {
+    // Not a repo / git unavailable / remote backend.
+    return null
+  }
+
+  const detached = typeof status.detached === 'boolean' ? status.detached : !status.current
+  const files = status.files.map(file => ({
+    path: file.path,
+    staged: isStaged(file),
+    unstaged: Boolean(file.working_dir && file.working_dir !== ' ' && file.working_dir !== '?'),
+    untracked: file.index === '?' || file.working_dir === '?',
+    conflicted: file.index === 'U' || file.working_dir === 'U'
+  }))
+
+  const result = {
+    branch: detached ? null : status.current || null,
+    defaultBranch: await defaultBranchName(git),
+    detached,
+    ahead: status.ahead || 0,
+    behind: status.behind || 0,
+    staged: files.filter(f => f.staged).length,
+    unstaged: files.filter(f => f.unstaged).length,
+    untracked: status.not_added.length,
+    conflicted: status.conflicted.length,
+    changed: files.length,
+    added: 0,
+    removed: 0,
+    files: files.slice(0, 200)
+  }
+
+  // +/- vs HEAD (staged + unstaged tracked changes). No HEAD yet → leave 0.
+  try {
+    const summary = await git.diffSummary(['HEAD'])
+    result.added = summary.insertions
+    result.removed = summary.deletions
+  } catch {
+    // No commits yet.
+  }
+
+  // `git diff HEAD` ignores untracked files, so a turn that only creates new
+  // files (the common case — a fresh module, a demo dir) showed +0 in the rail
+  // while the review pane counted them. Fold untracked insertions into `added`
+  // so the rail matches reality. Bounded (size cap + concurrency) like the
+  // review tree; only the capped file slice is counted so a huge untracked tree
+  // can't stall the probe.
+  try {
+    const untracked = status.not_added.slice(0, 500)
+    for (let i = 0; i < untracked.length; i += UNTRACKED_LINE_COUNT_CONCURRENCY) {
+      const batch = await Promise.all(
+        untracked.slice(i, i + UNTRACKED_LINE_COUNT_CONCURRENCY).map(path => untrackedInsertions(cwd, path))
+      )
+      result.added += batch.reduce((sum, n) => sum + n, 0)
+    }
+  } catch {
+    // Best-effort: a probe failure just leaves untracked lines uncounted.
+  }
+
+  return result
+}
+
+module.exports = {
+  branchBase,
+  fileDiffVsHead,
+  repoStatus,
+  resolveRenamePath,
+  reviewCommit,
+  reviewCommitContext,
+  reviewCreatePr,
+  reviewDiff,
+  reviewList,
+  reviewPush,
+  reviewRevParse,
+  reviewRevert,
+  reviewShipInfo,
+  reviewStage,
+  reviewUnstage
+}

apps/desktop/electron/git-review-ops.test.cjs

@@ -0,0 +1,22 @@
+'use strict'
+
+const assert = require('node:assert/strict')
+const test = require('node:test')
+
+const { resolveRenamePath } = require('./git-review-ops.cjs')
+
+test('resolveRenamePath: plain path is unchanged', () => {
+  assert.equal(resolveRenamePath('src/a.ts'), 'src/a.ts')
+})
+
+test('resolveRenamePath: simple rename resolves to the new path', () => {
+  assert.equal(resolveRenamePath('old.ts => new.ts'), 'new.ts')
+})
+
+test('resolveRenamePath: brace rename resolves to the new path', () => {
+  assert.equal(resolveRenamePath('src/{old => new}/file.ts'), 'src/new/file.ts')
+})
+
+test('resolveRenamePath: brace rename collapsing a segment', () => {
+  assert.equal(resolveRenamePath('src/{lib => }/file.ts'), 'src/file.ts')
+})

apps/desktop/electron/git-worktree-ops.cjs

@@ -0,0 +1,241 @@
+'use strict'
+
+// Git-driven worktree operations for the desktop "Start work" flow: spin up a
+// fresh worktree the lightest way (`git worktree add -b`), list real worktrees,
+// and remove them. Git is the source of truth; the renderer just drives these.
+
+const path = require('node:path')
+const fs = require('node:fs')
+const { execFile } = require('node:child_process')
+
+const { resolveRequestedPathForIpc } = require('./hardening.cjs')
+
+function runGit(gitBin, args, cwd) {
+  return new Promise((resolve, reject) => {
+    execFile(
+      gitBin,
+      args,
+      { cwd, windowsHide: true, timeout: 30_000, maxBuffer: 8 * 1024 * 1024 },
+      (err, stdout, stderr) => {
+        if (err) {
+          err.stderr = String(stderr || '')
+          reject(err)
+
+          return
+        }
+
+        resolve(String(stdout || ''))
+      }
+    )
+  })
+}
+
+// Parse `git worktree list --porcelain`. The first record is the main worktree.
+function parseWorktrees(out) {
+  const trees = []
+  let cur = null
+
+  for (const line of out.split('\n')) {
+    if (line.startsWith('worktree ')) {
+      if (cur) {
+        trees.push(cur)
+      }
+
+      cur = { path: line.slice(9).trim(), branch: null, detached: false, bare: false, locked: false }
+    } else if (!cur) {
+      continue
+    } else if (line.startsWith('branch ')) {
+      cur.branch = line.slice(7).trim().replace(/^refs\/heads\//, '')
+    } else if (line === 'detached') {
+      cur.detached = true
+    } else if (line === 'bare') {
+      cur.bare = true
+    } else if (line.startsWith('locked')) {
+      cur.locked = true
+    }
+  }
+
+  if (cur) {
+    trees.push(cur)
+  }
+
+  return trees
+}
+
+async function listWorktrees(repoPath, gitBin) {
+  let resolved
+
+  try {
+    resolved = resolveRequestedPathForIpc(repoPath, { purpose: 'Worktree list' })
+  } catch {
+    return []
+  }
+
+  try {
+    const out = await runGit(gitBin, ['worktree', 'list', '--porcelain'], resolved)
+
+    return parseWorktrees(out).map((tree, index) => ({
+      path: tree.path,
+      branch: tree.branch,
+      isMain: index === 0,
+      detached: tree.detached,
+      locked: tree.locked
+    }))
+  } catch {
+    return []
+  }
+}
+
+// A git-ref-safe branch name (spaces → "-", drop forbidden chars, trim edges),
+// or "" when nothing usable remains. Mirrors the renderer's `gitRef`, so a bad
+// value can't reach `git` no matter the caller (the GUI also enforces live).
+function sanitizeBranch(name) {
+  return String(name || '')
+    .replace(/\s+/g, '-')
+    .replace(/[^\w./-]/g, '')
+    .replace(/-{2,}/g, '-')
+    .replace(/\/{2,}/g, '/')
+    .replace(/\.{2,}/g, '.')
+    .replace(/^[-./]+|[-./]+$/g, '')
+}
+
+function slugify(name) {
+  const slug = String(name || '')
+    .trim()
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, '-')
+    .replace(/^-+|-+$/g, '')
+    .slice(0, 40)
+    .replace(/-+$/g, '')
+
+  return slug || 'work'
+}
+
+// A brand-new project folder isn't a git repo — and a freshly-init'd one has no
+// commit to branch from — so `git worktree add` would fail. Make the dir a repo
+// with a root commit on the user's behalf so worktrees "just work". No-op for a
+// repo that already has commits; never touches the user's files (the seed commit
+// is `--allow-empty`), and never inits a dir that already lives inside a repo.
+async function ensureGitRepo(gitBin, dir) {
+  let needsRoot = false
+
+  try {
+    const inside = (await runGit(gitBin, ['rev-parse', '--is-inside-work-tree'], dir)).trim()
+
+    if (inside !== 'true') {
+      await runGit(gitBin, ['init'], dir)
+      needsRoot = true
+    } else {
+      // Repo exists; a worktree still needs a HEAD to branch from.
+      try {
+        await runGit(gitBin, ['rev-parse', '--verify', 'HEAD'], dir)
+      } catch {
+        needsRoot = true
+      }
+    }
+  } catch {
+    await runGit(gitBin, ['init'], dir)
+    needsRoot = true
+  }
+
+  if (needsRoot) {
+    // Inline identity so the seed commit lands even with no global git config.
+    await runGit(
+      gitBin,
+      ['-c', 'user.email=hermes@localhost', '-c', 'user.name=Hermes', 'commit', '--allow-empty', '-m', 'Initial commit'],
+      dir
+    )
+  }
+}
+
+// Resolve the repo's MAIN worktree root, so `.worktrees/` always nests under the
+// primary checkout even when called from a linked worktree.
+async function mainRoot(gitBin, cwd) {
+  const list = await listWorktrees(cwd, gitBin)
+  const main = list.find(tree => tree.isMain)
+
+  return main ? main.path : cwd
+}
+
+function uniqueDir(base) {
+  let dir = base
+  let n = 1
+
+  while (fs.existsSync(dir)) {
+    n += 1
+    dir = `${base}-${n}`
+  }
+
+  return dir
+}
+
+async function addWorktree(repoPath, options, gitBin) {
+  const resolved = resolveRequestedPathForIpc(repoPath, { purpose: 'Worktree add' })
+  // A new project's folder may not be a git repo yet — init it (with a root
+  // commit) so the worktree has something to branch from.
+  await ensureGitRepo(gitBin, resolved)
+  const root = await mainRoot(gitBin, resolved)
+  const opts = options || {}
+  const slug = slugify(opts.name || `work-${Date.now().toString(36)}`)
+  const branch = sanitizeBranch(opts.branch) || `hermes/${slug}`
+  const dir = uniqueDir(path.join(root, '.worktrees', slug))
+
+  const args = ['worktree', 'add', '-b', branch, dir]
+
+  if (opts.base) {
+    args.push(String(opts.base))
+  }
+
+  try {
+    await runGit(gitBin, args, root)
+  } catch (err) {
+    // Branch name may already exist — retry checking out the existing branch
+    // into a fresh worktree dir instead of failing the whole flow.
+    if (/already exists/i.test(err.stderr || '')) {
+      await runGit(gitBin, ['worktree', 'add', dir, branch], root)
+    } else {
+      throw err
+    }
+  }
+
+  return { path: dir, branch, repoRoot: root }
+}
+
+async function removeWorktree(repoPath, worktreePath, options, gitBin) {
+  const resolvedRepo = resolveRequestedPathForIpc(repoPath, { purpose: 'Worktree remove (repo)' })
+  const resolvedTree = resolveRequestedPathForIpc(worktreePath, { purpose: 'Worktree remove (tree)' })
+  const root = await mainRoot(gitBin, resolvedRepo)
+  const args = ['worktree', 'remove']
+
+  if (options && options.force) {
+    args.push('--force')
+  }
+
+  args.push(resolvedTree)
+  await runGit(gitBin, args, root)
+
+  return { removed: resolvedTree }
+}
+
+async function switchBranch(repoPath, branch, gitBin) {
+  const resolved = resolveRequestedPathForIpc(repoPath, { purpose: 'Branch switch' })
+  const target = sanitizeBranch(branch)
+
+  if (!target) {
+    throw new Error('Branch name is required.')
+  }
+
+  await runGit(gitBin, ['switch', target], resolved)
+
+  return { branch: target }
+}
+
+module.exports = {
+  addWorktree,
+  ensureGitRepo,
+  listWorktrees,
+  parseWorktrees,
+  removeWorktree,
+  sanitizeBranch,
+  switchBranch
+}

apps/desktop/electron/git-worktree-ops.test.cjs

@@ -0,0 +1,88 @@
+'use strict'
+
+const assert = require('node:assert/strict')
+const { execFileSync } = require('node:child_process')
+const fs = require('node:fs')
+const os = require('node:os')
+const path = require('node:path')
+const test = require('node:test')
+
+const { ensureGitRepo, parseWorktrees, sanitizeBranch, switchBranch } = require('./git-worktree-ops.cjs')
+
+test('sanitizeBranch: spaces → hyphens, forbidden chars dropped, edges trimmed', () => {
+  assert.equal(sanitizeBranch('beach vibes'), 'beach-vibes')
+  assert.equal(sanitizeBranch('feat/cool thing'), 'feat/cool-thing')
+  assert.equal(sanitizeBranch('  wip~^:? '), 'wip')
+  assert.equal(sanitizeBranch('///'), '')
+})
+
+test('parseWorktrees: main checkout + linked worktree', () => {
+  const out = [
+    'worktree /repo',
+    'HEAD abc123',
+    'branch refs/heads/main',
+    '',
+    'worktree /repo/.worktrees/feat',
+    'HEAD def456',
+    'branch refs/heads/hermes/feat',
+    ''
+  ].join('\n')
+
+  const trees = parseWorktrees(out)
+
+  assert.equal(trees.length, 2)
+  assert.equal(trees[0].path, '/repo')
+  assert.equal(trees[0].branch, 'main')
+  assert.equal(trees[1].path, '/repo/.worktrees/feat')
+  assert.equal(trees[1].branch, 'hermes/feat')
+})
+
+test('parseWorktrees: detached + locked flags', () => {
+  const out = ['worktree /repo/wt', 'HEAD abc', 'detached', 'locked reason', ''].join('\n')
+  const trees = parseWorktrees(out)
+
+  assert.equal(trees.length, 1)
+  assert.equal(trees[0].detached, true)
+  assert.equal(trees[0].locked, true)
+  assert.equal(trees[0].branch, null)
+})
+
+test('parseWorktrees: empty input', () => {
+  assert.deepEqual(parseWorktrees(''), [])
+})
+
+test('ensureGitRepo: inits a plain dir with a root commit so worktrees branch', async () => {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'hermes-wt-'))
+  const git = (...args) => execFileSync('git', args, { cwd: dir }).toString().trim()
+
+  try {
+    await ensureGitRepo('git', dir)
+    assert.match(git('rev-parse', '--verify', 'HEAD'), /^[0-9a-f]{7,}$/)
+
+    // The whole point: a worktree can now branch off the seeded root commit.
+    execFileSync('git', ['worktree', 'add', '-b', 'wt', path.join(dir, '.worktrees', 'wt')], { cwd: dir })
+    assert.ok(fs.existsSync(path.join(dir, '.worktrees', 'wt')))
+
+    // Idempotent: an already-committed repo gets no extra commit.
+    await ensureGitRepo('git', dir)
+    assert.equal(git('rev-list', '--count', 'HEAD'), '1')
+  } finally {
+    fs.rmSync(dir, { recursive: true, force: true })
+  }
+})
+
+test('switchBranch: switches a normal checkout branch', async () => {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'hermes-switch-'))
+  const git = (...args) => execFileSync('git', args, { cwd: dir }).toString().trim()
+
+  try {
+    await ensureGitRepo('git', dir)
+    execFileSync('git', ['branch', 'feature'], { cwd: dir })
+
+    await switchBranch(dir, 'feature', 'git')
+
+    assert.equal(git('branch', '--show-current'), 'feature')
+  } finally {
+    fs.rmSync(dir, { recursive: true, force: true })
+  }
+})

apps/desktop/electron/git-worktrees.cjs

@@ -1,174 +0,0 @@
-'use strict'
-
-// Resolve git-worktree relationships for a set of session cwds, reading git's
-// on-disk metadata directly (no `git` spawn per path):
-//
-//   - A normal checkout has a `.git` DIRECTORY at its root → it's the main
-//     worktree; its repo root IS that directory's parent.
-//   - A linked worktree has a `.git` FILE: `gitdir: <repo>/.git/worktrees/<name>`.
-//     That admin dir's `commondir` points back at the shared `<repo>/.git`, whose
-//     parent is the main repo root.
-//
-// Grouping by repoRoot therefore clusters a repo's main checkout with all of its
-// linked worktrees, regardless of how the worktree directories are named. The
-// branch (read from the worktree's own HEAD) gives each worktree a meaningful
-// label.
-
-const fs = require('node:fs')
-const path = require('node:path')
-const { resolveRequestedPathForIpc } = require('./hardening.cjs')
-
-// Walk up from `start` to the nearest ancestor that carries a `.git` entry
-// (file for a linked worktree, dir for the main checkout). Capped so a stray
-// path can't loop forever.
-function findGitHost(start, fsImpl) {
-  let dir = start
-
-  for (let i = 0; i < 64; i += 1) {
-    const dotgit = path.join(dir, '.git')
-
-    try {
-      if (fsImpl.existsSync(dotgit)) {
-        return dir
-      }
-    } catch {
-      return null
-    }
-
-    const parent = path.dirname(dir)
-
-    if (parent === dir) {
-      return null
-    }
-
-    dir = parent
-  }
-
-  return null
-}
-
-function readBranch(gitDir, fsImpl) {
-  try {
-    const head = fsImpl.readFileSync(path.join(gitDir, 'HEAD'), 'utf8').trim()
-    const ref = head.match(/^ref:\s*refs\/heads\/(.+)$/)
-
-    if (ref) {
-      return ref[1]
-    }
-
-    // Detached HEAD: surface a short sha so the worktree still gets a label.
-    return /^[0-9a-f]{7,40}$/i.test(head) ? head.slice(0, 8) : null
-  } catch {
-    return null
-  }
-}
-
-// Given the directory that owns the `.git` entry, resolve its worktree identity.
-function resolveFromHost(host, fsImpl) {
-  const dotgit = path.join(host, '.git')
-  let stat
-
-  try {
-    stat = fsImpl.statSync(dotgit)
-  } catch {
-    return null
-  }
-
-  if (stat.isDirectory()) {
-    return {
-      repoRoot: host,
-      worktreeRoot: host,
-      isMainWorktree: true,
-      branch: readBranch(dotgit, fsImpl)
-    }
-  }
-
-  // Linked worktree: `.git` is a file pointing at the admin dir.
-  let contents
-
-  try {
-    contents = fsImpl.readFileSync(dotgit, 'utf8').trim()
-  } catch {
-    return null
-  }
-
-  const match = contents.match(/^gitdir:\s*(.+)$/m)
-
-  if (!match) {
-    return null
-  }
-
-  const adminDir = path.resolve(host, match[1].trim())
-
-  // `commondir` resolves to the shared `<repo>/.git`; fall back to walking two
-  // levels up from `<repo>/.git/worktrees/<name>` if it's missing.
-  let commonDir
-
-  try {
-    const rel = fsImpl.readFileSync(path.join(adminDir, 'commondir'), 'utf8').trim()
-    commonDir = path.resolve(adminDir, rel)
-  } catch {
-    commonDir = path.dirname(path.dirname(adminDir))
-  }
-
-  return {
-    repoRoot: path.dirname(commonDir),
-    worktreeRoot: host,
-    isMainWorktree: false,
-    branch: readBranch(adminDir, fsImpl)
-  }
-}
-
-function resolveWorktree(startPath, fsImpl = fs) {
-  let resolved
-
-  try {
-    resolved = resolveRequestedPathForIpc(startPath, { purpose: 'Worktree lookup' })
-  } catch {
-    return null
-  }
-
-  let start = resolved
-
-  try {
-    const stat = fsImpl.statSync(resolved)
-
-    if (!stat.isDirectory()) {
-      start = path.dirname(resolved)
-    }
-  } catch {
-    return null
-  }
-
-  const host = findGitHost(start, fsImpl)
-
-  if (!host) {
-    return null
-  }
-
-  return resolveFromHost(host, fsImpl)
-}
-
-// Batch entry point for the renderer: maps each requested cwd to its worktree
-// info (or null when it isn't inside a git checkout / can't be read). Dedupes so
-// many sessions sharing a cwd cost one lookup.
-async function worktreesForIpc(cwds, options = {}) {
-  const fsImpl = options.fs || fs
-  const list = Array.isArray(cwds) ? cwds : []
-  const out = {}
-
-  for (const cwd of list) {
-    if (typeof cwd !== 'string' || !cwd.trim() || cwd in out) {
-      continue
-    }
-
-    out[cwd] = resolveWorktree(cwd, fsImpl)
-  }
-
-  return out
-}
-
-module.exports = {
-  resolveWorktree,
-  worktreesForIpc
-}

apps/desktop/electron/main.cjs

@@ -12,6 +12,7 @@ const {
   powerMonitor,
   protocol,
   safeStorage,
+  screen,
   session,
   shell,
   systemPreferences
@@ -54,8 +55,25 @@ const {
   buildRelaunchScript
 } = require('./update-relaunch.cjs')
 const { gitRootForIpc } = require('./git-root.cjs')
-const { worktreesForIpc } = require('./git-worktrees.cjs')
+const { addWorktree, listWorktrees, removeWorktree, switchBranch } = require('./git-worktree-ops.cjs')
+const {
+  fileDiffVsHead,
+  repoStatus,
+  reviewCommit,
+  reviewCommitContext,
+  reviewCreatePr,
+  reviewDiff,
+  reviewList,
+  reviewPush,
+  reviewRevParse,
+  reviewRevert,
+  reviewShipInfo,
+  reviewStage,
+  reviewUnstage
+} = require('./git-review-ops.cjs')
+const { scanGitRepos } = require('./git-repo-scan.cjs')
 const { OFFICIAL_REPO_HTTPS_URL, isOfficialSshRemote } = require('./update-remote.cjs')
+const { resolveBehindCount, shouldCountCommits } = require('./update-count.cjs')
 const { runRebuildWithRetry } = require('./update-rebuild.cjs')
 const {
   buildPosixCleanupScript,
@@ -67,6 +85,13 @@ const {
   uninstallArgsForMode
 } = require('./desktop-uninstall.cjs')
 const { isPackagedInstallPath: isPackagedInstallPathUnderRoots } = require('./workspace-cwd.cjs')
+const {
+  MIN_WIDTH: WINDOW_MIN_WIDTH,
+  MIN_HEIGHT: WINDOW_MIN_HEIGHT,
+  sanitizeWindowState,
+  computeWindowOptions,
+  debounce
+} = require('./window-state.cjs')
 const {
   authModeFromStatus,
   buildGatewayWsUrl,
@@ -320,6 +345,7 @@ const BOOTSTRAP_MARKER_SCHEMA_VERSION = 1
 
 const DESKTOP_CONNECTION_CONFIG_PATH = path.join(app.getPath('userData'), 'connection.json')
 const DESKTOP_UPDATE_CONFIG_PATH = path.join(app.getPath('userData'), 'updates.json')
+const DESKTOP_WINDOW_STATE_PATH = path.join(app.getPath('userData'), 'window-state.json')
 // active-profile.json records which Hermes profile the desktop launches its
 // local backend as. When set, startHermes() passes `hermes --profile <name>
 // dashboard …`, which deterministically pins HERMES_HOME (see
@@ -944,6 +970,33 @@ function openExternalUrl(rawUrl) {
   return true
 }
 
+async function openPreviewInBrowser(rawUrl) {
+  const raw = String(rawUrl || '').trim()
+  if (!raw) return false
+
+  let parsed
+  try {
+    parsed = new URL(raw)
+  } catch {
+    return false
+  }
+
+  if (parsed.protocol === 'file:') {
+    let localPath
+    try {
+      localPath = resolveRequestedPathForIpc(parsed.toString(), { purpose: 'Open preview in browser' })
+    } catch {
+      return false
+    }
+
+    await shell.openExternal(pathToFileURL(localPath).toString())
+
+    return true
+  }
+
+  return openExternalUrl(raw)
+}
+
 function ensureWslWindowsFonts() {
   if (!IS_WSL) return
 
@@ -1466,6 +1519,30 @@ function resolveGitBinary() {
   return _gitBinaryCache
 }
 
+// resolveGhBinary — locate the GitHub CLI. GUI-launched apps get a minimal PATH
+// that omits Homebrew (/opt/homebrew/bin, /usr/local/bin) where `gh` usually
+// lives, so a bare spawn('gh') ENOENTs even though `gh` works in the user's
+// terminal. Check the common install locations first, then PATH. Cached.
+let _ghBinaryCache = null
+function resolveGhBinary() {
+  if (_ghBinaryCache) return _ghBinaryCache
+
+  const candidates = []
+
+  if (IS_WINDOWS) {
+    candidates.push(path.join(process.env['ProgramFiles'] || 'C:\\Program Files', 'GitHub CLI', 'gh.exe'))
+    if (process.env.LOCALAPPDATA) {
+      candidates.push(path.join(process.env.LOCALAPPDATA, 'Microsoft', 'WinGet', 'Links', 'gh.exe'))
+    }
+  } else {
+    const home = app.getPath('home')
+    candidates.push('/opt/homebrew/bin/gh', '/usr/local/bin/gh', '/usr/bin/gh', path.join(home, '.local', 'bin', 'gh'))
+  }
+
+  _ghBinaryCache = candidates.find(fileExists) || findOnPath('gh') || 'gh'
+  return _ghBinaryCache
+}
+
 function recentHermesLog() {
   return hermesLog.slice(-20).join('\n')
 }
@@ -1495,6 +1572,36 @@ function writeDesktopUpdateConfig(config) {
   writeFileAtomic(DESKTOP_UPDATE_CONFIG_PATH, JSON.stringify(config, null, 2))
 }
 
+// ─── Main-window geometry persistence (window-state.json) ──────────────────
+
+function readWindowState() {
+  try {
+    return sanitizeWindowState(JSON.parse(fs.readFileSync(DESKTOP_WINDOW_STATE_PATH, 'utf8')))
+  } catch {
+    return null
+  }
+}
+
+// Persist the window's restored (non-maximized) bounds plus its maximized flag.
+// getNormalBounds() keeps the pre-maximize size, so un-maximizing next session
+// lands back where the user actually sized the window.
+function persistWindowState() {
+  if (!mainWindow || mainWindow.isDestroyed() || mainWindow.isMinimized()) return
+  try {
+    const { x, y, width, height } = mainWindow.getNormalBounds()
+    fs.mkdirSync(path.dirname(DESKTOP_WINDOW_STATE_PATH), { recursive: true })
+    writeFileAtomic(
+      DESKTOP_WINDOW_STATE_PATH,
+      JSON.stringify({ x, y, width, height, isMaximized: mainWindow.isMaximized() }, null, 2)
+    )
+  } catch (err) {
+    rememberLog(`[window-state] persist failed: ${err?.message || err}`)
+  }
+}
+
+// resized/moved fire many times mid-drag on Linux; debounce to one write.
+const schedulePersistWindowState = debounce(persistWindowState, 250)
+
 // Match the backend's source resolution but bias toward a real git checkout.
 // Dev → SOURCE_REPO_ROOT. Packaged/CLI install → ACTIVE_HERMES_ROOT.
 // HERMES_DESKTOP_HERMES_ROOT always wins so devs can pin a worktree.
@@ -1640,15 +1747,34 @@ async function checkUpdates() {
   }
 
   const git = args => runGit(args, { cwd: updateRoot }).then(r => r.stdout.trim())
-  const [currentSha, targetSha, countStr, dirtyStr, currentBranch] = await Promise.all([
+  const [currentSha, targetSha, dirtyStr, currentBranch, shallowStr, mergeBaseStr] = await Promise.all([
     git(['rev-parse', 'HEAD']),
     git(['rev-parse', `origin/${branch}`]),
-    git(['rev-list', `HEAD..origin/${branch}`, '--count']),
     git(['status', '--porcelain']),
-    git(['rev-parse', '--abbrev-ref', 'HEAD'])
+    git(['rev-parse', '--abbrev-ref', 'HEAD']),
+    git(['rev-parse', '--is-shallow-repository']),
+    // merge-base exits non-zero with empty stdout when HEAD shares no common
+    // ancestor with the freshly fetched tip — exactly the shallow-clone case.
+    git(['merge-base', 'HEAD', `origin/${branch}`])
   ])
 
-  const behind = Number.parseInt(countStr, 10) || 0
+  const isShallow = shallowStr === 'true'
+  const hasMergeBase = Boolean(mergeBaseStr)
+  // Only enumerate the commit count when it is meaningful. On a shallow checkout
+  // with no merge-base, `rev-list --count` walks the entire remote ancestry
+  // (thousands of commits, see #51922) and resolveBehindCount discards the
+  // result anyway in favour of a SHA compare — so skip the expensive query.
+  const countStr = shouldCountCommits({ isShallow, hasMergeBase })
+    ? await git(['rev-list', `HEAD..origin/${branch}`, '--count'])
+    : ''
+
+  const behind = resolveBehindCount({
+    countStr,
+    currentSha,
+    targetSha,
+    isShallow,
+    hasMergeBase
+  })
   const commits = behind > 0 ? await readCommitLog(updateRoot, branch) : []
 
   return {
@@ -2834,7 +2960,6 @@ async function ensureRuntime(backend) {
   return backend
 }
 
-
 function fetchJson(url, token, options = {}) {
   return new Promise((resolve, reject) => {
     const body = options.body === undefined ? undefined : Buffer.from(JSON.stringify(options.body))
@@ -5358,13 +5483,149 @@ function createNewSessionWindow() {
   return spawnSecondaryWindow({ newSession: true })
 }
 
+// The pet overlay: a single transparent, frameless, always-on-top window that
+// hosts ONLY the floating mascot. Shift-clicking the in-window pet "pops it out"
+// here so it can leave the app's bounds and stay visible while Hermes is
+// minimized (Codex-style task-completion glance). It carries no gateway
+// connection of its own — the main renderer is the single source of truth and
+// pushes pet state over IPC (hermes:pet-overlay:state); the overlay just renders
+// it. Control flows back (pop-in, composer submit) via hermes:pet-overlay:control.
+let petOverlayWindow = null
+
+function petOverlayUrl() {
+  if (DEV_SERVER) {
+    return `${DEV_SERVER.endsWith('/') ? DEV_SERVER.slice(0, -1) : DEV_SERVER}/?win=overlay#/`
+  }
+
+  return `${pathToFileURL(resolveRendererIndex()).toString()}?win=overlay#/`
+}
+
+function spawnPetOverlayWindow(bounds) {
+  const win = new BrowserWindow({
+    width: Math.max(80, Math.round(bounds?.width || 220)),
+    height: Math.max(80, Math.round(bounds?.height || 220)),
+    x: Number.isFinite(bounds?.x) ? Math.round(bounds.x) : undefined,
+    y: Number.isFinite(bounds?.y) ? Math.round(bounds.y) : undefined,
+    frame: false,
+    transparent: true,
+    resizable: false,
+    movable: true,
+    minimizable: false,
+    maximizable: false,
+    fullscreenable: false,
+    // Windows/Linux need this so the helper window does not get its own
+    // taskbar/alt-tab entry. On macOS, cmd-tab is app-level and this can make
+    // the whole app look like it vanished when the only newly-created visible
+    // window is a frameless overlay. Use NSPanel + Mission Control hiding below
+    // instead, leaving the main Hermes app as the Dock/cmd-tab anchor.
+    skipTaskbar: !IS_MAC,
+    hasShadow: false,
+    alwaysOnTop: true,
+    // macOS panels are non-activating helper windows and can float over full
+    // screen spaces without becoming the app's main switcher window.
+    type: IS_MAC ? 'panel' : undefined,
+    hiddenInMissionControl: IS_MAC,
+    // Non-activating: the overlay must never become the app's key/main window,
+    // or it (a frameless, taskbar-skipping panel) becomes the app's switcher
+    // anchor and the Hermes icon drops out of cmd/alt-tab — especially when the
+    // main window is minimized. We flip this on only while the composer needs
+    // the keyboard (see hermes:pet-overlay:set-focusable).
+    focusable: false,
+    show: false,
+    // Fully transparent — the renderer paints only the sprite + bubble.
+    backgroundColor: '#00000000',
+    webPreferences: {
+      preload: path.join(__dirname, 'preload.cjs'),
+      contextIsolation: true,
+      sandbox: true,
+      nodeIntegration: false,
+      devTools: true,
+      // Keep the sprite animating + bubble updating while the main window is
+      // minimized/blurred — the whole point of the overlay.
+      backgroundThrottling: false
+    }
+  })
+
+  // Float above other apps and follow the user across desktops so the pet is
+  // always reachable. `floating` + `type: panel` is the macOS NSPanel path; the
+  // more aggressive `screen-saver` level can interfere with normal app/window
+  // switching semantics.
+  win.setAlwaysOnTop(true, IS_MAC ? 'floating' : 'screen-saver')
+  win.setHiddenInMissionControl?.(true)
+  try {
+    // Electron docs: macOS may transform process type on each
+    // setVisibleOnAllWorkspaces() call unless skipTransformProcessType=true,
+    // which briefly hides the Dock/cmd-tab presence. Keep Hermes in the normal
+    // ForegroundApplication class so shift-clicking the pet never drops the app
+    // out of app switchers.
+    win.setVisibleOnAllWorkspaces(
+      true,
+      IS_MAC ? { visibleOnFullScreen: true, skipTransformProcessType: true } : undefined
+    )
+  } catch {
+    // Not supported everywhere — best effort.
+  }
+
+  wireCommonWindowHandlers(win)
+
+  win.once('ready-to-show', () => {
+    if (!win.isDestroyed()) win.showInactive()
+  })
+
+  win.on('closed', () => {
+    if (petOverlayWindow === win) {
+      petOverlayWindow = null
+    }
+
+    // If the overlay went away on its own (e.g. ⌘W), tell the main renderer to
+    // pop the pet back in so it doesn't stay hidden. Harmless echo when we're
+    // the ones who closed it (popInPet already cleared the active flag).
+    if (mainWindow && !mainWindow.isDestroyed()) {
+      mainWindow.webContents.send('hermes:pet-overlay:control', { type: 'pop-in' })
+    }
+  })
+
+  win.loadURL(petOverlayUrl())
+
+  return win
+}
+
+function openPetOverlay(bounds) {
+  if (petOverlayWindow && !petOverlayWindow.isDestroyed()) {
+    if (bounds) {
+      petOverlayWindow.setBounds({
+        x: Math.round(bounds.x),
+        y: Math.round(bounds.y),
+        width: Math.max(80, Math.round(bounds.width)),
+        height: Math.max(80, Math.round(bounds.height))
+      })
+    }
+
+    petOverlayWindow.showInactive()
+
+    return petOverlayWindow
+  }
+
+  petOverlayWindow = spawnPetOverlayWindow(bounds)
+
+  return petOverlayWindow
+}
+
+function closePetOverlay() {
+  if (petOverlayWindow && !petOverlayWindow.isDestroyed()) {
+    petOverlayWindow.close()
+  }
+
+  petOverlayWindow = null
+}
+
 function createWindow() {
   const icon = getAppIconPath()
+  const savedWindowState = readWindowState()
   mainWindow = new BrowserWindow({
-    width: 1220,
-    height: 800,
-    minWidth: 400,
-    minHeight: 620,
+    ...computeWindowOptions(savedWindowState, screen.getAllDisplays()),
+    minWidth: WINDOW_MIN_WIDTH,
+    minHeight: WINDOW_MIN_HEIGHT,
     title: 'Hermes',
     // Frameless title bar on every platform so the renderer can paint the
     // "hide sidebar" button (and other left-side titlebar tools) flush with
@@ -5406,6 +5667,8 @@ function createWindow() {
     }
   }
 
+  if (savedWindowState?.isMaximized) mainWindow.maximize()
+
   mainWindow.once('ready-to-show', () => {
     if (mainWindow && !mainWindow.isDestroyed()) mainWindow.show()
   })
@@ -5415,6 +5678,19 @@ function createWindow() {
   mainWindow.on('will-leave-full-screen', () => sendWindowStateChanged(false))
   mainWindow.on('leave-full-screen', () => sendWindowStateChanged(false))
 
+  // Reopen where the user left off. resized/moved settle once per drag; close is
+  // the cross-platform backstop, flushed synchronously before the window is gone.
+  mainWindow.on('resized', schedulePersistWindowState)
+  mainWindow.on('moved', schedulePersistWindowState)
+  mainWindow.on('maximize', schedulePersistWindowState)
+  mainWindow.on('unmaximize', schedulePersistWindowState)
+  mainWindow.on('close', () => schedulePersistWindowState.flush())
+
+  // The overlay rides the main window — closing the app's primary window must
+  // tear it down too (otherwise it strands as an orphan that blocks
+  // window-all-closed from quitting on Windows/Linux).
+  mainWindow.on('closed', () => closePetOverlay())
+
   wireCommonWindowHandlers(mainWindow)
 
   mainWindow.webContents.on('render-process-gone', (_event, details) => {
@@ -5535,6 +5811,116 @@ ipcMain.handle('hermes:window:openNewSession', async () => {
 
   return { ok: true }
 })
+
+// --- Pet overlay (pop-out mascot) -----------------------------------------
+// `request` is `{ bounds, screen }`. A fresh pop-out passes viewport-space
+// bounds (screen=false): convert to screen space by adding the main window's
+// content origin so the pet lands where it sat in-window. A remembered/dragged
+// spot passes screen-space bounds (screen=true) and is used as-is. We return the
+// resolved screen bounds so the renderer can persist exactly where it opened.
+ipcMain.handle('hermes:pet-overlay:open', async (_event, request) => {
+  const bounds = request && request.bounds ? request.bounds : request
+  const isScreen = Boolean(request && request.screen)
+  let screenBounds = bounds
+
+  try {
+    if (bounds && !isScreen && mainWindow && !mainWindow.isDestroyed()) {
+      const content = mainWindow.getContentBounds()
+      screenBounds = {
+        x: content.x + (bounds.x || 0),
+        y: content.y + (bounds.y || 0),
+        width: bounds.width,
+        height: bounds.height
+      }
+    }
+  } catch {
+    // Fall back to raw bounds if the window geometry is unavailable.
+  }
+
+  openPetOverlay(screenBounds)
+
+  return { ok: true, bounds: screenBounds }
+})
+ipcMain.handle('hermes:pet-overlay:close', async () => {
+  closePetOverlay()
+
+  return { ok: true }
+})
+// Drag: the overlay reports a new absolute screen position (it already knows the
+// pointer's screen coords), we just move the window.
+ipcMain.on('hermes:pet-overlay:set-bounds', (_event, bounds) => {
+  if (!petOverlayWindow || petOverlayWindow.isDestroyed() || !bounds) {
+    return
+  }
+
+  petOverlayWindow.setBounds({
+    x: Math.round(bounds.x),
+    y: Math.round(bounds.y),
+    width: Math.max(80, Math.round(bounds.width)),
+    height: Math.max(80, Math.round(bounds.height))
+  })
+})
+// Click-through: the overlay window is a full rectangle but only the pet pixels
+// should be interactive. The renderer toggles this as the cursor enters/leaves
+// the sprite so transparent margins pass clicks to whatever is behind.
+ipcMain.on('hermes:pet-overlay:ignore-mouse', (_event, ignore) => {
+  if (petOverlayWindow && !petOverlayWindow.isDestroyed()) {
+    petOverlayWindow.setIgnoreMouseEvents(Boolean(ignore), { forward: true })
+  }
+})
+// The overlay is a non-activating panel (focusable:false) so it never steals
+// the app's cmd/alt-tab anchor from the main window. But the pop-up composer
+// needs the keyboard, so the renderer asks us to flip it focusable + focus it
+// while the composer is open, then back to non-activating when it closes.
+ipcMain.on('hermes:pet-overlay:set-focusable', (_event, focusable) => {
+  if (!petOverlayWindow || petOverlayWindow.isDestroyed()) {
+    return
+  }
+
+  petOverlayWindow.setFocusable(Boolean(focusable))
+  if (focusable) {
+    petOverlayWindow.focus()
+  }
+})
+// Main renderer → overlay: forward the latest pet state for the overlay to render.
+ipcMain.on('hermes:pet-overlay:state', (_event, payload) => {
+  if (petOverlayWindow && !petOverlayWindow.isDestroyed()) {
+    petOverlayWindow.webContents.send('hermes:pet-overlay:state', payload)
+  }
+})
+// Overlay → main renderer: control messages (pop back in, composer submit).
+ipcMain.on('hermes:pet-overlay:control', (_event, payload) => {
+  if (!mainWindow || mainWindow.isDestroyed()) {
+    return
+  }
+
+  // Double-click toggles the app window: hide it away if it's up front, bring it
+  // back if it's minimized/buried. Pure window control — nothing for the
+  // renderer to do, so don't forward it.
+  if (payload && payload.type === 'toggle-app') {
+    if (mainWindow.isMinimized() || !mainWindow.isVisible()) {
+      mainWindow.show()
+      mainWindow.focus()
+    } else {
+      mainWindow.minimize()
+    }
+
+    return
+  }
+
+  // The mail icon means "take me to the app": raise the main window (it may be
+  // minimized or buried) before the renderer navigates to the latest thread.
+  if (payload && payload.type === 'open-app') {
+    if (mainWindow.isMinimized()) {
+      mainWindow.restore()
+    }
+
+    mainWindow.show()
+    mainWindow.focus()
+  }
+
+  mainWindow.webContents.send('hermes:pet-overlay:control', payload)
+})
 ipcMain.handle('hermes:bootstrap:reset', async () => {
   // Renderer's "Reload and retry" path. Clear the latched failure and
   // reset connection state so the next startHermes() call restarts the
@@ -5998,6 +6384,12 @@ ipcMain.handle('hermes:openExternal', (_event, url) => {
   }
 })
 
+ipcMain.handle('hermes:openPreviewInBrowser', async (_event, url) => {
+  if (!(await openPreviewInBrowser(url))) {
+    throw new Error('Invalid preview URL')
+  }
+})
+
 // User-configurable default project directory. The renderer reads this on
 // settings mount and seeds the value into the picker; writing back persists
 // it via writeDefaultProjectDir so resolveHermesCwd picks it up on the next
@@ -6243,7 +6635,160 @@ ipcMain.handle('hermes:fs:readDir', async (_event, dirPath) => readDirForIpc(dir
 
 ipcMain.handle('hermes:fs:gitRoot', async (_event, startPath) => gitRootForIpc(startPath))
 
-ipcMain.handle('hermes:fs:worktrees', async (_event, cwds) => worktreesForIpc(cwds))
+// Reveal a path in the OS file manager (Finder / Explorer / Files).
+ipcMain.handle('hermes:fs:reveal', async (_event, targetPath) => {
+  const target = String(targetPath || '').trim()
+
+  if (!target) {
+    return false
+  }
+
+  try {
+    shell.showItemInFolder(target)
+
+    return true
+  } catch {
+    return false
+  }
+})
+
+// Rename a file/folder in place. The renderer passes the existing path + a new
+// base name; the destination is resolved in the SAME parent dir so a rename can
+// never move the item elsewhere or traverse out. Rejects on a name collision.
+ipcMain.handle('hermes:fs:rename', async (_event, targetPath, newName) => {
+  const src = String(targetPath || '').trim()
+  const name = String(newName || '').trim()
+
+  if (!src || !name || name === '.' || name === '..' || name.includes('/') || name.includes('\\')) {
+    throw new Error('Invalid rename')
+  }
+
+  const dst = path.join(path.dirname(src), name)
+
+  if (dst === src) {
+    return { path: dst }
+  }
+
+  if (fs.existsSync(dst)) {
+    throw new Error(`"${name}" already exists`)
+  }
+
+  await fs.promises.rename(src, dst)
+
+  return { path: dst }
+})
+
+// Write a small UTF-8 text file (e.g. a project's IDEA.md at creation). The path
+// is hardened (resolveRequestedPathForIpc) and the parent must already exist —
+// this never creates directory trees or escapes the allowed roots, and content
+// is size-capped so it can't be abused as a bulk-write primitive.
+ipcMain.handle('hermes:fs:writeText', async (_event, filePath, content) => {
+  const raw = String(filePath || '').trim()
+
+  if (!raw) {
+    throw new Error('Invalid path')
+  }
+
+  const text = String(content ?? '')
+
+  if (text.length > 1_000_000) {
+    throw new Error('Content too large')
+  }
+
+  const resolved = resolveRequestedPathForIpc(expandUserPath(raw), { purpose: 'Write text file' })
+
+  if (!directoryExists(path.dirname(resolved))) {
+    throw new Error('Parent directory does not exist')
+  }
+
+  await fs.promises.writeFile(resolved, text, 'utf8')
+
+  return { path: resolved }
+})
+
+// Move a file/folder to the OS trash (recoverable) — the VS Code "Delete"
+// default. `shell.trashItem` routes to Finder/Explorer/Files trash per platform.
+ipcMain.handle('hermes:fs:trash', async (_event, targetPath) => {
+  const target = String(targetPath || '').trim()
+
+  if (!target) {
+    throw new Error('Invalid delete')
+  }
+
+  await shell.trashItem(target)
+
+  return true
+})
+
+// Git-driven worktree management ("Start work" flow). Errors surface to the
+// renderer as rejected promises so it can toast a friendly message.
+ipcMain.handle('hermes:git:worktreeList', async (_event, repoPath) =>
+  listWorktrees(repoPath, resolveGitBinary())
+)
+
+ipcMain.handle('hermes:git:worktreeAdd', async (_event, repoPath, options) =>
+  addWorktree(repoPath, options || {}, resolveGitBinary())
+)
+
+ipcMain.handle('hermes:git:worktreeRemove', async (_event, repoPath, worktreePath, options) =>
+  removeWorktree(repoPath, worktreePath, options || {}, resolveGitBinary())
+)
+
+ipcMain.handle('hermes:git:branchSwitch', async (_event, repoPath, branch) =>
+  switchBranch(repoPath, branch, resolveGitBinary())
+)
+
+// Compact repo status (branch, ahead/behind, change counts + files) for the
+// composer coding rail. Returns null on a non-repo / remote backend so the rail
+// hides cleanly rather than erroring.
+ipcMain.handle('hermes:git:repoStatus', async (_event, repoPath) => repoStatus(repoPath, resolveGitBinary()))
+
+// Codex-style review pane: list changed files for a scope, fetch one file's
+// unified diff, and stage / unstage / revert. Reads return empty on failure;
+// mutations reject so the renderer can toast.
+ipcMain.handle('hermes:git:review:list', async (_event, repoPath, scope, baseRef) =>
+  reviewList(repoPath, scope, baseRef, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:diff', async (_event, repoPath, filePath, scope, baseRef, staged) =>
+  reviewDiff(repoPath, filePath, scope, baseRef, staged, resolveGitBinary())
+)
+// Working-tree-vs-HEAD diff for one file (the preview's "show the diff" view).
+ipcMain.handle('hermes:git:fileDiff', async (_event, repoPath, filePath) =>
+  fileDiffVsHead(repoPath, filePath, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:stage', async (_event, repoPath, filePath) =>
+  reviewStage(repoPath, filePath ?? null, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:unstage', async (_event, repoPath, filePath) =>
+  reviewUnstage(repoPath, filePath ?? null, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:revert', async (_event, repoPath, filePath) =>
+  reviewRevert(repoPath, filePath ?? null, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:revParse', async (_event, repoPath, ref) =>
+  reviewRevParse(repoPath, ref, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:commit', async (_event, repoPath, message, push) =>
+  reviewCommit(repoPath, message, Boolean(push), resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:commitContext', async (_event, repoPath) =>
+  reviewCommitContext(repoPath, resolveGitBinary())
+)
+ipcMain.handle('hermes:git:review:push', async (_event, repoPath) => reviewPush(repoPath, resolveGitBinary()))
+ipcMain.handle('hermes:git:review:shipInfo', async (_event, repoPath) => reviewShipInfo(repoPath, resolveGhBinary()))
+ipcMain.handle('hermes:git:review:createPr', async (_event, repoPath) =>
+  reviewCreatePr(repoPath, resolveGitBinary(), resolveGhBinary())
+)
+
+// Repo-first project discovery: scan bounded roots for git repos (pure fs walk,
+// no native addon). Never throws to the renderer — failures yield an empty list.
+ipcMain.handle('hermes:git:scanRepos', async (_event, roots, options) => {
+  try {
+    return await scanGitRepos(roots || [], options || {})
+  } catch {
+    return []
+  }
+})
 
 ipcMain.handle('hermes:terminal:start', async (event, payload = {}) => {
   if (!nodePty) {
@@ -6739,6 +7284,10 @@ function configureSpellChecker() {
 }
 
 app.on('before-quit', () => {
+  // The always-on-top overlay isn't a "real" app window; close it so a stray
+  // pet can't keep the process alive or float over a quit app.
+  closePetOverlay()
+
   // Quitting mid-install should stop the installer, not orphan it.
   if (bootstrapAbortController) {
     try {

apps/desktop/electron/preload.cjs

@@ -7,6 +7,32 @@ contextBridge.exposeInMainWorld('hermesDesktop', {
   getGatewayWsUrl: profile => ipcRenderer.invoke('hermes:gateway:ws-url', profile),
   openSessionWindow: (sessionId, opts) => ipcRenderer.invoke('hermes:window:openSession', sessionId, opts),
   openNewSessionWindow: () => ipcRenderer.invoke('hermes:window:openNewSession'),
+  petOverlay: {
+    // Main renderer → main process: window lifecycle + drag. `request` is
+    // `{ bounds, screen }`; resolves with the screen bounds it actually used.
+    open: request => ipcRenderer.invoke('hermes:pet-overlay:open', request),
+    close: () => ipcRenderer.invoke('hermes:pet-overlay:close'),
+    setBounds: bounds => ipcRenderer.send('hermes:pet-overlay:set-bounds', bounds),
+    setIgnoreMouse: ignore => ipcRenderer.send('hermes:pet-overlay:ignore-mouse', ignore),
+    // Flip the overlay focusable (and focus it) while the composer needs keys.
+    setFocusable: focusable => ipcRenderer.send('hermes:pet-overlay:set-focusable', focusable),
+    // Main renderer → overlay (forwarded by main): push the latest pet state.
+    pushState: payload => ipcRenderer.send('hermes:pet-overlay:state', payload),
+    // Overlay → main renderer (forwarded by main): pop back in / composer submit.
+    control: payload => ipcRenderer.send('hermes:pet-overlay:control', payload),
+    // Overlay subscribes to state pushes.
+    onState: callback => {
+      const listener = (_event, payload) => callback(payload)
+      ipcRenderer.on('hermes:pet-overlay:state', listener)
+      return () => ipcRenderer.removeListener('hermes:pet-overlay:state', listener)
+    },
+    // Main renderer subscribes to overlay control messages.
+    onControl: callback => {
+      const listener = (_event, payload) => callback(payload)
+      ipcRenderer.on('hermes:pet-overlay:control', listener)
+      return () => ipcRenderer.removeListener('hermes:pet-overlay:control', listener)
+    }
+  },
   getBootProgress: () => ipcRenderer.invoke('hermes:boot-progress:get'),
   getConnectionConfig: profile => ipcRenderer.invoke('hermes:connection-config:get', profile),
   saveConnectionConfig: payload => ipcRenderer.invoke('hermes:connection-config:save', payload),
@@ -44,6 +70,7 @@ contextBridge.exposeInMainWorld('hermesDesktop', {
   setTranslucency: payload => ipcRenderer.send('hermes:translucency', payload),
   setPreviewShortcutActive: active => ipcRenderer.send('hermes:previewShortcutActive', Boolean(active)),
   openExternal: url => ipcRenderer.invoke('hermes:openExternal', url),
+  openPreviewInBrowser: url => ipcRenderer.invoke('hermes:openPreviewInBrowser', url),
   fetchLinkTitle: url => ipcRenderer.invoke('hermes:fetchLinkTitle', url),
   sanitizeWorkspaceCwd: cwd => ipcRenderer.invoke('hermes:workspace:sanitize', cwd),
   settings: {
@@ -55,7 +82,34 @@ contextBridge.exposeInMainWorld('hermesDesktop', {
   getRecentLogs: () => ipcRenderer.invoke('hermes:logs:recent'),
   readDir: dirPath => ipcRenderer.invoke('hermes:fs:readDir', dirPath),
   gitRoot: startPath => ipcRenderer.invoke('hermes:fs:gitRoot', startPath),
-  worktrees: cwds => ipcRenderer.invoke('hermes:fs:worktrees', cwds),
+  revealPath: targetPath => ipcRenderer.invoke('hermes:fs:reveal', targetPath),
+  renamePath: (targetPath, newName) => ipcRenderer.invoke('hermes:fs:rename', targetPath, newName),
+  writeTextFile: (filePath, content) => ipcRenderer.invoke('hermes:fs:writeText', filePath, content),
+  trashPath: targetPath => ipcRenderer.invoke('hermes:fs:trash', targetPath),
+  git: {
+    worktreeList: repoPath => ipcRenderer.invoke('hermes:git:worktreeList', repoPath),
+    worktreeAdd: (repoPath, options) => ipcRenderer.invoke('hermes:git:worktreeAdd', repoPath, options),
+    worktreeRemove: (repoPath, worktreePath, options) =>
+      ipcRenderer.invoke('hermes:git:worktreeRemove', repoPath, worktreePath, options),
+    branchSwitch: (repoPath, branch) => ipcRenderer.invoke('hermes:git:branchSwitch', repoPath, branch),
+    repoStatus: repoPath => ipcRenderer.invoke('hermes:git:repoStatus', repoPath),
+    fileDiff: (repoPath, filePath) => ipcRenderer.invoke('hermes:git:fileDiff', repoPath, filePath),
+    scanRepos: (roots, options) => ipcRenderer.invoke('hermes:git:scanRepos', roots, options),
+    review: {
+      list: (repoPath, scope, baseRef) => ipcRenderer.invoke('hermes:git:review:list', repoPath, scope, baseRef),
+      diff: (repoPath, filePath, scope, baseRef, staged) =>
+        ipcRenderer.invoke('hermes:git:review:diff', repoPath, filePath, scope, baseRef, staged),
+      stage: (repoPath, filePath) => ipcRenderer.invoke('hermes:git:review:stage', repoPath, filePath),
+      unstage: (repoPath, filePath) => ipcRenderer.invoke('hermes:git:review:unstage', repoPath, filePath),
+      revert: (repoPath, filePath) => ipcRenderer.invoke('hermes:git:review:revert', repoPath, filePath),
+      revParse: (repoPath, ref) => ipcRenderer.invoke('hermes:git:review:revParse', repoPath, ref),
+      commit: (repoPath, message, push) => ipcRenderer.invoke('hermes:git:review:commit', repoPath, message, push),
+      commitContext: repoPath => ipcRenderer.invoke('hermes:git:review:commitContext', repoPath),
+      push: repoPath => ipcRenderer.invoke('hermes:git:review:push', repoPath),
+      shipInfo: repoPath => ipcRenderer.invoke('hermes:git:review:shipInfo', repoPath),
+      createPr: repoPath => ipcRenderer.invoke('hermes:git:review:createPr', repoPath)
+    }
+  },
   terminal: {
     dispose: id => ipcRenderer.invoke('hermes:terminal:dispose', id),
     resize: (id, size) => ipcRenderer.invoke('hermes:terminal:resize', id, size),

apps/desktop/electron/update-count.cjs

@@ -0,0 +1,28 @@
+'use strict'
+
+// Whether `git rev-list HEAD..origin/<branch> --count` produces a meaningful
+// number worth computing. On a SHALLOW checkout (installer clones with
+// --depth 1) the local history often shares no merge-base with the freshly
+// fetched origin tip, so the count enumerates the entire remote ancestry and
+// returns a bogus huge number (e.g. 12104) — see #51922. resolveBehindCount
+// discards that bogus count in favour of a SHA compare, so the caller should
+// SKIP the expensive rev-list entirely in that case rather than run it and
+// throw the result away.
+function shouldCountCommits({ isShallow, hasMergeBase }) {
+  return !(isShallow && !hasMergeBase)
+}
+
+// Resolve how many commits the local checkout is behind origin for the desktop
+// update indicator. When the count isn't meaningful (shallow + no merge-base)
+// fall back to a binary up-to-date check by SHA, exactly like the official-SSH
+// path in checkUpdates() and the CLI guard in hermes_cli/banner.py. Full clones
+// (developers / Docker dev images) keep the exact count path unchanged.
+function resolveBehindCount({ countStr, currentSha, targetSha, isShallow, hasMergeBase }) {
+  if (!shouldCountCommits({ isShallow, hasMergeBase })) {
+    if (currentSha && targetSha && currentSha === targetSha) return 0
+    return 1 // behind by an unknown amount — show a generic "update available"
+  }
+  return Number.parseInt(countStr, 10) || 0
+}
+
+module.exports = { resolveBehindCount, shouldCountCommits }

apps/desktop/electron/update-count.test.cjs

@@ -0,0 +1,79 @@
+'use strict'
+const test = require('node:test')
+const assert = require('node:assert/strict')
+const { resolveBehindCount, shouldCountCommits } = require('./update-count.cjs')
+
+// FAIL-BEFORE: pre-fix the function did `Number.parseInt(countStr) || 0`
+// unconditionally, so a shallow checkout with no merge-base surfaced the bogus
+// rev-list count (e.g. 12104). This asserts the new shallow/no-merge-base branch.
+test('shallow checkout with no merge-base does NOT trust the bogus rev-list count', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '12104', currentSha: 'aaa', targetSha: 'bbb',
+    isShallow: true, hasMergeBase: false,
+  }), 1)
+})
+
+test('shallow checkout with no merge-base but identical SHA reports up-to-date', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '12104', currentSha: 'abc', targetSha: 'abc',
+    isShallow: true, hasMergeBase: false,
+  }), 0)
+})
+
+test('shallow checkout WITH a merge-base keeps the exact count (reliable)', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '3', currentSha: 'aaa', targetSha: 'bbb',
+    isShallow: true, hasMergeBase: true,
+  }), 3)
+})
+
+test('full (non-shallow) clone keeps the exact count path unchanged', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '7', currentSha: 'aaa', targetSha: 'bbb',
+    isShallow: false, hasMergeBase: true,
+  }), 7)
+})
+
+test('up-to-date full clone reports 0', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '0', currentSha: 'x', targetSha: 'x',
+    isShallow: false, hasMergeBase: true,
+  }), 0)
+})
+
+test('non-numeric count falls back to 0 (defensive, unchanged behaviour)', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '', currentSha: 'aaa', targetSha: 'bbb',
+    isShallow: false, hasMergeBase: true,
+  }), 0)
+})
+
+// shouldCountCommits gates the expensive `rev-list --count` in checkUpdates().
+// FAIL-BEFORE: in the shallow + no-merge-base case the caller ran rev-list
+// unconditionally and discarded the bogus result; this predicate lets the
+// caller SKIP the whole-ancestry enumeration in exactly that case (#51922).
+test('shallow checkout with no merge-base SKIPS the rev-list count', () => {
+  assert.equal(shouldCountCommits({ isShallow: true, hasMergeBase: false }), false)
+})
+
+test('shallow checkout WITH a merge-base still runs the count', () => {
+  assert.equal(shouldCountCommits({ isShallow: true, hasMergeBase: true }), true)
+})
+
+test('full (non-shallow) clone always runs the count', () => {
+  assert.equal(shouldCountCommits({ isShallow: false, hasMergeBase: true }), true)
+  assert.equal(shouldCountCommits({ isShallow: false, hasMergeBase: false }), true)
+})
+
+// The skip path produces an empty countStr; resolveBehindCount must NOT trust
+// it and must fall through to the SHA compare (mirrors the live call site).
+test('skipped-count path resolves via SHA compare, never via empty countStr', () => {
+  assert.equal(resolveBehindCount({
+    countStr: '', currentSha: 'aaa', targetSha: 'bbb',
+    isShallow: true, hasMergeBase: false,
+  }), 1)
+  assert.equal(resolveBehindCount({
+    countStr: '', currentSha: 'same', targetSha: 'same',
+    isShallow: true, hasMergeBase: false,
+  }), 0)
+})

apps/desktop/electron/window-state.cjs

@@ -0,0 +1,117 @@
+/**
+ * Pure geometry helpers for window-state.json — restoring the main window's
+ * size, position, and maximized flag across launches. Side-effect-free so the
+ * part that actually matters (rejecting garbage + off-screen bounds) is
+ * unit-testable without booting Electron; main.cjs owns the file I/O and the
+ * live `screen` displays.
+ */
+
+// Defaults mirror the historical hardcoded BrowserWindow size; MIN_* mirror its
+// minWidth/minHeight so a restored size never undershoots what the live window
+// allows. A fresh install (no saved state) is byte-identical to before.
+const DEFAULT_WIDTH = 1220
+const DEFAULT_HEIGHT = 800
+const MIN_WIDTH = 400
+const MIN_HEIGHT = 620
+
+// Keep at least this much of the window over a display work area before we trust
+// a saved position, so the title bar stays grabbable after a monitor unplugs.
+const MIN_VISIBLE = 48
+
+const finite = v => typeof v === 'number' && Number.isFinite(v)
+const clamp = (v, lo, hi) => Math.max(lo, Math.min(v, hi))
+
+// Parse raw JSON → clean state, or null if garbage. width/height are required
+// and floored; x/y survive only as a finite pair; isMaximized is strict.
+function sanitizeWindowState(raw) {
+  if (!raw || typeof raw !== 'object' || !finite(raw.width) || !finite(raw.height)) return null
+
+  const state = {
+    width: Math.max(MIN_WIDTH, Math.round(raw.width)),
+    height: Math.max(MIN_HEIGHT, Math.round(raw.height)),
+    isMaximized: raw.isMaximized === true
+  }
+  if (finite(raw.x) && finite(raw.y)) {
+    state.x = Math.round(raw.x)
+    state.y = Math.round(raw.y)
+  }
+  return state
+}
+
+// True when `bounds` overlaps some display's work area by ≥ MIN_VISIBLE on both
+// axes. `displays` is Electron's screen.getAllDisplays() shape.
+function onScreen(bounds, displays) {
+  if (!Array.isArray(displays)) return false
+  return displays.some(({ workArea: a } = {}) => {
+    if (!a) return false
+    const x = Math.min(bounds.x + bounds.width, a.x + a.width) - Math.max(bounds.x, a.x)
+    const y = Math.min(bounds.y + bounds.height, a.y + a.height) - Math.max(bounds.y, a.y)
+    return x >= MIN_VISIBLE && y >= MIN_VISIBLE
+  })
+}
+
+// Sanitized state (or null) → BrowserWindow size/position options. Always sets
+// width/height, capped to the largest current display so a size saved on a
+// since-disconnected bigger monitor can't exceed any screen the user now has.
+// Sets x/y only when still on-screen; otherwise Electron centers the window.
+function computeWindowOptions(state, displays) {
+  const opts = {
+    width: finite(state?.width) ? state.width : DEFAULT_WIDTH,
+    height: finite(state?.height) ? state.height : DEFAULT_HEIGHT
+  }
+
+  const cap = (Array.isArray(displays) ? displays : []).reduce(
+    (m, { workArea: a } = {}) =>
+      a && finite(a.width) && finite(a.height)
+        ? { width: Math.max(m.width, a.width), height: Math.max(m.height, a.height) }
+        : m,
+    { width: 0, height: 0 }
+  )
+  if (cap.width && cap.height) {
+    opts.width = clamp(opts.width, MIN_WIDTH, cap.width)
+    opts.height = clamp(opts.height, MIN_HEIGHT, cap.height)
+  }
+
+  if (
+    state &&
+    finite(state.x) &&
+    finite(state.y) &&
+    onScreen({ x: state.x, y: state.y, width: opts.width, height: opts.height }, displays)
+  ) {
+    opts.x = state.x
+    opts.y = state.y
+  }
+  return opts
+}
+
+// Trailing debounce: collapse a burst of resize/move events (Linux fires many
+// mid-drag) into a single run `delayMs` after the last. `.flush()` runs now and
+// cancels the pending timer — used on close, before the window is gone.
+function debounce(fn, delayMs) {
+  let timer = null
+  const debounced = () => {
+    clearTimeout(timer)
+    timer = setTimeout(() => {
+      timer = null
+      fn()
+    }, delayMs)
+  }
+  debounced.flush = () => {
+    clearTimeout(timer)
+    timer = null
+    fn()
+  }
+  return debounced
+}
+
+module.exports = {
+  DEFAULT_WIDTH,
+  DEFAULT_HEIGHT,
+  MIN_WIDTH,
+  MIN_HEIGHT,
+  MIN_VISIBLE,
+  sanitizeWindowState,
+  onScreen,
+  computeWindowOptions,
+  debounce
+}

apps/desktop/electron/window-state.test.cjs

@@ -0,0 +1,135 @@
+/**
+ * Unit tests for the pure window-state geometry helpers. These cover the logic
+ * that protects the user: garbage rejection, off-screen fallback, oversized
+ * clamping, and the debounce that collapses mid-drag write storms.
+ */
+
+const test = require('node:test')
+const assert = require('node:assert/strict')
+
+const {
+  DEFAULT_WIDTH,
+  DEFAULT_HEIGHT,
+  MIN_WIDTH,
+  MIN_HEIGHT,
+  sanitizeWindowState,
+  onScreen,
+  computeWindowOptions,
+  debounce
+} = require('./window-state.cjs')
+
+// A single 1920×1080 monitor (work area trimmed for the taskbar).
+const PRIMARY = [{ workArea: { x: 0, y: 0, width: 1920, height: 1040 } }]
+// A laptop panel left behind after a bigger external monitor is unplugged.
+const LAPTOP = [{ workArea: { x: 0, y: 0, width: 1366, height: 728 } }]
+
+// ─── sanitizeWindowState ───────────────────────────────────────────────────
+
+test('sanitizeWindowState rejects missing/garbage input', () => {
+  for (const bad of [null, undefined, 'nope', 42, {}, { width: 'x', height: 800 }, { width: NaN, height: 800 }, { width: 1000 }]) {
+    assert.equal(sanitizeWindowState(bad), null)
+  }
+})
+
+test('sanitizeWindowState keeps a valid full state and rounds HiDPI fractions', () => {
+  assert.deepEqual(sanitizeWindowState({ x: 100.6, y: 50.2, width: 1400.4, height: 900.7, isMaximized: true }), {
+    x: 101,
+    y: 50,
+    width: 1400,
+    height: 901,
+    isMaximized: true
+  })
+})
+
+test('sanitizeWindowState floors size to the minimums', () => {
+  const state = sanitizeWindowState({ width: 10, height: 10 })
+  assert.equal(state.width, MIN_WIDTH)
+  assert.equal(state.height, MIN_HEIGHT)
+})
+
+test('sanitizeWindowState drops a partial position but keeps the size', () => {
+  assert.deepEqual(sanitizeWindowState({ x: 100, width: 1400, height: 900 }), {
+    width: 1400,
+    height: 900,
+    isMaximized: false
+  })
+})
+
+test('sanitizeWindowState treats isMaximized strictly', () => {
+  assert.equal(sanitizeWindowState({ width: 1400, height: 900, isMaximized: 'yes' }).isMaximized, false)
+})
+
+// ─── onScreen ──────────────────────────────────────────────────────────────
+
+test('onScreen accepts a window on the primary or a secondary display', () => {
+  const dual = [...PRIMARY, { workArea: { x: 1920, y: 0, width: 2560, height: 1400 } }]
+  assert.equal(onScreen({ x: 100, y: 100, width: 1220, height: 800 }, PRIMARY), true)
+  assert.equal(onScreen({ x: 2200, y: 200, width: 1220, height: 800 }, dual), true)
+})
+
+test('onScreen rejects off-screen, slivers, and bad input', () => {
+  assert.equal(onScreen({ x: 3000, y: 100, width: 1220, height: 800 }, PRIMARY), false) // past right edge
+  assert.equal(onScreen({ x: 100, y: -900, width: 1220, height: 800 }, PRIMARY), false) // above top
+  assert.equal(onScreen({ x: 1910, y: 100, width: 1220, height: 800 }, PRIMARY), false) // ~10px sliver
+  assert.equal(onScreen({ x: 0, y: 0, width: 1220, height: 800 }, []), false)
+  assert.equal(onScreen({ x: 0, y: 0, width: 1220, height: 800 }, null), false)
+})
+
+// ─── computeWindowOptions ──────────────────────────────────────────────────
+
+test('computeWindowOptions falls back to defaults with no saved state', () => {
+  assert.deepEqual(computeWindowOptions(null, PRIMARY), { width: DEFAULT_WIDTH, height: DEFAULT_HEIGHT })
+})
+
+test('computeWindowOptions restores an on-screen position', () => {
+  const saved = sanitizeWindowState({ x: 200, y: 150, width: 1400, height: 900 })
+  assert.deepEqual(computeWindowOptions(saved, PRIMARY), { width: 1400, height: 900, x: 200, y: 150 })
+})
+
+test('computeWindowOptions keeps the size but drops an off-screen position', () => {
+  const saved = sanitizeWindowState({ x: 5000, y: 150, width: 1400, height: 900 })
+  assert.deepEqual(computeWindowOptions(saved, PRIMARY), { width: 1400, height: 900 })
+})
+
+test('computeWindowOptions clamps a size larger than the only display', () => {
+  const saved = sanitizeWindowState({ width: 2560, height: 1440 })
+  assert.deepEqual(computeWindowOptions(saved, LAPTOP), { width: 1366, height: 728 })
+})
+
+test('computeWindowOptions keeps the MIN floor on a sub-minimum display', () => {
+  const tiny = [{ workArea: { x: 0, y: 0, width: 360, height: 480 } }]
+  const saved = sanitizeWindowState({ width: 2000, height: 1500 })
+  assert.deepEqual(computeWindowOptions(saved, tiny), { width: MIN_WIDTH, height: MIN_HEIGHT })
+})
+
+test('computeWindowOptions does not clamp when displays are unknown', () => {
+  const saved = sanitizeWindowState({ width: 2560, height: 1440 })
+  assert.deepEqual(computeWindowOptions(saved, []), { width: 2560, height: 1440 })
+})
+
+// ─── debounce ──────────────────────────────────────────────────────────────
+
+test('debounce coalesces a burst into one trailing run', t => {
+  t.mock.timers.enable({ apis: ['setTimeout'] })
+  let calls = 0
+  const d = debounce(() => { calls += 1 }, 250)
+
+  d(); d(); d()
+  assert.equal(calls, 0)
+  t.mock.timers.tick(249)
+  assert.equal(calls, 0)
+  t.mock.timers.tick(1)
+  assert.equal(calls, 1)
+})
+
+test('debounce.flush runs now and cancels the pending timer', t => {
+  t.mock.timers.enable({ apis: ['setTimeout'] })
+  let calls = 0
+  const d = debounce(() => { calls += 1 }, 250)
+
+  d()
+  d.flush()
+  assert.equal(calls, 1)
+  t.mock.timers.tick(1000)
+  assert.equal(calls, 1)
+})

apps/desktop/package.json

@@ -37,7 +37,7 @@
     "test:desktop:nsis": "node scripts/test-desktop.mjs nsis",
     "test:desktop:existing": "node scripts/test-desktop.mjs existing",
     "test:desktop:fresh": "node scripts/test-desktop.mjs fresh",
-    "test:desktop:platforms": "node --test electron/bootstrap-platform.test.cjs electron/hardening.test.cjs electron/backend-env.test.cjs electron/backend-probes.test.cjs electron/backend-ready.test.cjs electron/bootstrap-runner.test.cjs electron/connection-config.test.cjs electron/dashboard-token.test.cjs electron/gateway-ws-probe.test.cjs electron/oauth-net-request.test.cjs electron/desktop-uninstall.test.cjs electron/session-windows.test.cjs electron/link-title-window.test.cjs electron/workspace-cwd.test.cjs electron/fs-read-dir.test.cjs electron/git-root.test.cjs electron/windows-child-process.test.cjs electron/update-remote.test.cjs electron/update-rebuild.test.cjs electron/update-marker.test.cjs electron/update-relaunch.test.cjs electron/windows-user-env.test.cjs",
+    "test:desktop:platforms": "node --test electron/bootstrap-platform.test.cjs electron/hardening.test.cjs electron/backend-env.test.cjs electron/backend-probes.test.cjs electron/backend-ready.test.cjs electron/bootstrap-runner.test.cjs electron/connection-config.test.cjs electron/dashboard-token.test.cjs electron/gateway-ws-probe.test.cjs electron/oauth-net-request.test.cjs electron/desktop-uninstall.test.cjs electron/session-windows.test.cjs electron/link-title-window.test.cjs electron/workspace-cwd.test.cjs electron/fs-read-dir.test.cjs electron/git-root.test.cjs electron/windows-child-process.test.cjs electron/update-remote.test.cjs electron/update-count.test.cjs electron/update-rebuild.test.cjs electron/update-marker.test.cjs electron/update-relaunch.test.cjs electron/windows-user-env.test.cjs electron/window-state.test.cjs",
     "typecheck": "tsc -p . --noEmit",
     "lint": "eslint src/ electron/",
     "lint:fix": "eslint src/ electron/ --fix",
@@ -93,6 +93,7 @@
     "remark-math": "^6.0.0",
     "remend": "^1.3.0",
     "shiki": "^4.0.2",
+    "simple-git": "^3.36.0",
     "streamdown": "^2.5.0",
     "tailwind-merge": "^3.5.0",
     "tailwindcss": "^4.2.4",

apps/desktop/scripts/bundle-electron-main.mjs

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+// bundle-electron-main.mjs — bundles electron/main.cjs into a single
+// self-contained file so the nix build doesn't need to ship node_modules/.
+//
+// `electron` is provided by the runtime; `node-pty` is staged separately
+// via stage-native-deps.cjs.  `preload.cjs` is NOT require()'d by main —
+// Electron loads it via path.join(__dirname, 'preload.cjs') — so it stays
+// as a separate file and doesn't need bundling.
+import { build } from 'esbuild'
+import { resolve, dirname } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { renameSync } from 'node:fs'
+
+const here = dirname(fileURLToPath(import.meta.url))
+const root = resolve(here, '..')
+const entry = resolve(root, 'electron/main.cjs')
+const tmp = resolve(root, 'electron/main.bundled.cjs')
+
+await build({
+  entryPoints: [entry],
+  bundle: true,
+  platform: 'node',
+  format: 'cjs',
+  target: 'node20',
+  outfile: tmp,
+  external: ['electron', 'node-pty'],
+  logLevel: 'info'
+})
+
+// Overwrite the original with the bundled version.
+renameSync(tmp, entry)
+
+console.log(`bundled ${entry}`)

apps/desktop/src/app/agents/index.tsx

@@ -4,14 +4,15 @@ import { type ReactNode, useEffect, useMemo, useState } from 'react'
 import { useElapsedSeconds } from '@/components/chat/activity-timer'
 import { ActivityTimerText } from '@/components/chat/activity-timer-text'
 import { FadeText } from '@/components/ui/fade-text'
+import { Codicon } from '@/components/ui/codicon'
 import { GlyphSpinner } from '@/components/ui/glyph-spinner'
 import { type Translations, useI18n } from '@/i18n'
-import { AlertCircle, CheckCircle2, Sparkles } from '@/lib/icons'
+import { AlertCircle, CheckCircle2 } from '@/lib/icons'
 import { useEnterAnimation } from '@/lib/use-enter-animation'
 import { cn } from '@/lib/utils'
-import { $activeSessionId } from '@/store/session'
 import {
   $subagentsBySession,
+  allSubagents,
   buildSubagentTree,
   type SubagentNode,
   type SubagentStatus,
@@ -77,15 +78,12 @@ interface AgentsViewProps {
 
 export function AgentsView({ onClose }: AgentsViewProps) {
   const { t } = useI18n()
-  const activeSessionId = useStore($activeSessionId)
   const subagentsBySession = useStore($subagentsBySession)
 
-  const activeSubagents = useMemo(
-    () => (activeSessionId ? (subagentsBySession[activeSessionId] ?? []) : []),
-    [activeSessionId, subagentsBySession]
-  )
-
-  const tree = useMemo(() => buildSubagentTree(activeSubagents), [activeSubagents])
+  // Aggregate every session, matching the status-bar indicator — a subagent
+  // running in a background session must still be visible here, or the two
+  // desync ("Agents N running" vs an empty tree).
+  const tree = useMemo(() => buildSubagentTree(allSubagents(subagentsBySession)), [subagentsBySession])
 
   return (
     <OverlayView
@@ -212,7 +210,7 @@ function SubagentTree({ tree }: { tree: SubagentNode[] }) {
   if (tree.length === 0) {
     return (
       <div className="grid place-items-center gap-3 py-12 text-center">
-        <Sparkles className="size-6 text-muted-foreground/60" />
+        <Codicon className="text-muted-foreground/60" name="hubot" size="1.5rem" />
         <p className="text-sm font-medium text-foreground/90">{t.agents.emptyTitle}</p>
         <p className="max-w-md text-xs leading-relaxed text-muted-foreground/75">{t.agents.emptyDesc}</p>
       </div>

apps/desktop/src/app/chat/composer/composer-text-guard.test.tsx

@@ -0,0 +1,106 @@
+// @vitest-environment jsdom
+import { act, cleanup, render } from '@testing-library/react'
+import { useCallback, useRef } from 'react'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+afterEach(cleanup)
+
+// Regression repro for #49903: on desktop v0.17.0 the composer threw an
+// uncaught `Error: Composer is not available` at startup and the input went
+// unresponsive. The throw comes from @assistant-ui/core's composer-runtime —
+// every *mutator* (setText/send/…) does `if (!core) throw new Error("Composer
+// is not available")` when the thread's composer core isn't bound yet. Unlike
+// the read path (`s.composer.text`, which is null-safe: `runtime?.text ?? ""`),
+// the mutators have no graceful fallback. ChatBar's mount-time effects (draft
+// restore, clearDraft, external inserts) push text via `aui.composer().setText`
+// before the core binds, and the popout refactor (#49488) widened that window,
+// so the throw surfaced as an uncaught error that wedged the input.
+//
+// The fix wraps every `aui.composer().setText` call in a `setComposerText`
+// helper that swallows the unbound-core throw — the contentEditable DOM +
+// draftRef already hold the text and the draft⇄editor sync re-applies it once
+// the core attaches, so nothing is lost. This Harness mirrors that helper
+// faithfully (same try/catch shape) over a fake `aui` whose composer can be
+// toggled bound/unbound, the way the assistant-ui runtime behaves across mount.
+
+interface FakeComposer {
+  setText: (value: string) => void
+}
+
+// Mirror of index.tsx's `useAui()` composer surface: composer() returns a
+// runtime whose setText throws exactly like @assistant-ui/core when unbound.
+function makeFakeAui(bound: { current: boolean }, applied: string[]) {
+  const composer: FakeComposer = {
+    setText(value: string) {
+      if (!bound.current) {
+        throw new Error('Composer is not available')
+      }
+
+      applied.push(value)
+    }
+  }
+
+  return { composer: () => composer }
+}
+
+function Harness({
+  bound,
+  applied,
+  onError
+}: {
+  applied: string[]
+  bound: { current: boolean }
+  onError: (err: unknown) => void
+}) {
+  const aui = useRef(makeFakeAui(bound, applied)).current
+
+  // Verbatim mirror of the production `setComposerText` helper in index.tsx.
+  const setComposerText = useCallback(
+    (value: string) => {
+      try {
+        aui.composer().setText(value)
+      } catch {
+        // Composer core not bound yet — swallow so the input stays usable.
+      }
+    },
+    [aui]
+  )
+
+  // A draft-restore-on-mount that fires while the core may still be unbound,
+  // exactly like loadIntoComposer/clearDraft do on startup.
+  try {
+    setComposerText('restored draft')
+  } catch (err) {
+    onError(err)
+  }
+
+  return null
+}
+
+describe('setComposerText guard (#49903)', () => {
+  it('swallows the unbound-core throw at startup instead of crashing the renderer', () => {
+    const applied: string[] = []
+    const bound = { current: false }
+    const onError = vi.fn()
+
+    expect(() => render(<Harness applied={applied} bound={bound} onError={onError} />)).not.toThrow()
+
+    // The guard absorbed the throw — nothing escaped to the renderer, and no
+    // assistant-ui write landed (core was unbound).
+    expect(onError).not.toHaveBeenCalled()
+    expect(applied).toEqual([])
+  })
+
+  it('writes through to the composer once the core is bound', () => {
+    const applied: string[] = []
+    const bound = { current: true }
+    const onError = vi.fn()
+
+    act(() => {
+      render(<Harness applied={applied} bound={bound} onError={onError} />)
+    })
+
+    expect(onError).not.toHaveBeenCalled()
+    expect(applied).toEqual(['restored draft'])
+  })
+})

apps/desktop/src/app/chat/composer/context-menu.tsx

@@ -13,6 +13,7 @@ import {
   DropdownMenuTrigger
 } from '@/components/ui/dropdown-menu'
 import { Kbd } from '@/components/ui/kbd'
+import { Tip } from '@/components/ui/tooltip'
 import { useI18n } from '@/i18n'
 import { Clipboard, FileText, FolderOpen, type IconComponent, ImageIcon, Link, MessageSquareText } from '@/lib/icons'
 import { cn } from '@/lib/utils'
@@ -42,22 +43,23 @@ export function ContextMenu({
   return (
     <>
       <DropdownMenu>
-        <DropdownMenuTrigger asChild>
-          <Button
-            aria-label={state.tools.label}
-            className={cn(
-              GHOST_ICON_BTN,
-              'data-[state=open]:bg-(--chrome-action-hover) data-[state=open]:text-foreground'
-            )}
-            disabled={!state.tools.enabled}
-            size="icon"
-            title={state.tools.label}
-            type="button"
-            variant="ghost"
-          >
-            <Codicon name="add" size="0.875rem" />
-          </Button>
-        </DropdownMenuTrigger>
+        <Tip label={state.tools.label} side="top">
+          <DropdownMenuTrigger asChild>
+            <Button
+              aria-label={state.tools.label}
+              className={cn(
+                GHOST_ICON_BTN,
+                'data-[state=open]:bg-(--chrome-action-hover) data-[state=open]:text-foreground'
+              )}
+              disabled={!state.tools.enabled}
+              size="icon"
+              type="button"
+              variant="ghost"
+            >
+              <Codicon name="add" size="0.875rem" />
+            </Button>
+          </DropdownMenuTrigger>
+        </Tip>
         <DropdownMenuContent align="start" className={cn('w-60', composerPanelCard)} side="top" sideOffset={6}>
           <DropdownMenuLabel className="px-2 pb-0.5 pt-0.5 text-[0.625rem] font-semibold uppercase tracking-wider text-(--ui-text-tertiary)">
             {c.attachLabel}

apps/desktop/src/app/chat/composer/focus.ts

@@ -10,8 +10,8 @@
  * steal focus from the composer effect.
  */
 
-import { RICH_INPUT_SLOT } from './rich-editor'
 import type { InlineRefInput } from './inline-refs'
+import { RICH_INPUT_SLOT } from './rich-editor'
 
 export type ComposerTarget = 'edit' | 'main'
 export type ComposerInsertMode = 'block' | 'inline'
@@ -34,6 +34,13 @@ interface InsertRefsDetail {
 const FOCUS_EVENT = 'hermes:composer-focus'
 const INSERT_EVENT = 'hermes:composer-insert'
 const INSERT_REFS_EVENT = 'hermes:composer-insert-refs'
+const SUBMIT_EVENT = 'hermes:composer-submit'
+const VOICE_TOGGLE_EVENT = 'hermes:composer-voice-toggle'
+
+interface SubmitDetail {
+  target: ComposerTarget
+  text: string
+}
 
 let activeTarget: ComposerTarget = 'main'
 
@@ -105,6 +112,30 @@ export const requestComposerInsertRefs = (
 export const onComposerInsertRefsRequest = (handler: (detail: InsertRefsDetail) => void) =>
   subscribe<InsertRefsDetail>(INSERT_REFS_EVENT, handler)
 
+/** Submit a prompt through a composer as if the user typed + sent it. Lets
+ * external panels (e.g. the review pane's "let the agent ship it" button) hand
+ * the agent a task without the user round-tripping through the input. */
+export const requestComposerSubmit = (
+  text: string,
+  { target = 'active' }: { target?: ComposerTarget | 'active' } = {}
+) => {
+  const trimmed = text.trim()
+
+  if (trimmed) {
+    dispatch<SubmitDetail>(SUBMIT_EVENT, { target: resolve(target), text: trimmed })
+  }
+}
+
+export const onComposerSubmitRequest = (handler: (detail: SubmitDetail) => void) =>
+  subscribe<SubmitDetail>(SUBMIT_EVENT, handler)
+
+/** Toggle the active composer's voice conversation — the `composer.voice`
+ *  hotkey (Ctrl+B) reaching into the composer that owns the voice state. */
+export const requestVoiceToggle = () => dispatch<{ at: number }>(VOICE_TOGGLE_EVENT, { at: Date.now() })
+
+export const onComposerVoiceToggleRequest = (handler: () => void) =>
+  subscribe<{ at: number }>(VOICE_TOGGLE_EVENT, () => handler())
+
 /**
  * Focus a composer input across React commit + browser focus restore.
  *

apps/desktop/src/app/chat/composer/index.tsx

@@ -45,8 +45,8 @@ import {
   $composerPoppedOut,
   POPOUT_WIDTH_REM,
   readPopoutBounds,
-  setComposerPoppedOut,
-  setComposerPopoutPosition
+  setComposerPopoutPosition,
+  setComposerPoppedOut
 } from '@/store/composer-popout'
 import {
   $queuedPromptsBySession,
@@ -61,6 +61,9 @@ import {
 } from '@/store/composer-queue'
 import { $statusItemsBySession } from '@/store/composer-status'
 import { notify } from '@/store/notifications'
+import { $previewStatusBySession } from '@/store/preview-status'
+import { requestStartWorkSession, startWorkInRepo, switchBranchInRepo } from '@/store/projects'
+import { toggleReview } from '@/store/review'
 import { $gatewayState, $messages, setSessionPickerOpen } from '@/store/session'
 import { $threadScrolledUp } from '@/store/thread-scroll'
 import { isSecondaryWindow } from '@/store/windows'
@@ -78,7 +81,9 @@ import {
   markActiveComposer,
   onComposerFocusRequest,
   onComposerInsertRefsRequest,
-  onComposerInsertRequest
+  onComposerInsertRequest,
+  onComposerSubmitRequest,
+  onComposerVoiceToggleRequest
 } from './focus'
 import { HelpHint } from './help-hint'
 import { useAtCompletions } from './hooks/use-at-completions'
@@ -106,6 +111,7 @@ import {
   slashChipElement
 } from './rich-editor'
 import { ComposerStatusStack } from './status-stack'
+import { CodingStatusRow } from './status-stack/coding-row'
 import { detectTrigger, extractClipboardImageBlobs, textBeforeCaret, type TriggerState } from './text-utils'
 import { ComposerTriggerPopover } from './trigger-popover'
 import type { ChatBarProps } from './types'
@@ -192,9 +198,36 @@ export function ChatBar({
 }: ChatBarProps) {
   const aui = useAui()
   const draft = useAuiState(s => s.composer.text)
+
+  // assistant-ui's composer *mutators* (setText/send/…) throw "Composer is not
+  // available" when the thread's composer core isn't bound yet — and unlike the
+  // read path (`s.composer.text`, which is null-safe), there's no graceful
+  // fallback. There's a startup/thread-swap window where this ChatBar's mount
+  // effects (draft restore, clearDraft, external inserts) run before the core
+  // binds; the popout refactor (#49488) widened it by moving the composer out
+  // of the contain wrapper into a sibling of the thread, so the throw began
+  // surfacing as an uncaught error that wedged the desktop input (#49903).
+  //
+  // Guard every mutation: if the core isn't ready, no-op the assistant-ui write.
+  // The contentEditable DOM + draftRef already hold the text, and the
+  // draft⇄editor sync reconciles composer state once the core attaches, so the
+  // draft is never lost — only the (premature) state push is skipped.
+  const setComposerText = useCallback(
+    (value: string) => {
+      try {
+        aui.composer().setText(value)
+      } catch {
+        // Composer core not bound yet — DOM/draftRef carry the text; the sync
+        // effect re-applies it after bind. Swallow so the input stays usable.
+      }
+    },
+    [aui]
+  )
+
   const attachments = useStore($composerAttachments)
   const queuedPromptsBySession = useStore($queuedPromptsBySession)
   const statusItemsBySession = useStore($statusItemsBySession)
+  const previewStatusBySession = useStore($previewStatusBySession)
   const scrolledUp = useStore($threadScrolledUp)
   // Pop-out is a shared, persisted state — but secondary windows (the Ctrl+Shift+N
   // tiny window, subagent watch windows) always start docked and can't pop out:
@@ -217,8 +250,12 @@ export function ChatBar({
 
   const statusStackVisible = useMemo(
     () =>
-      queuedPrompts.length > 0 || (statusSessionId ? (statusItemsBySession[statusSessionId]?.length ?? 0) > 0 : false),
-    [queuedPrompts.length, statusItemsBySession, statusSessionId]
+      queuedPrompts.length > 0 ||
+      (statusSessionId
+        ? (statusItemsBySession[statusSessionId]?.length ?? 0) > 0 ||
+          (previewStatusBySession[statusSessionId]?.length ?? 0) > 0
+        : false),
+    [previewStatusBySession, queuedPrompts.length, statusItemsBySession, statusSessionId]
   )
 
   const composerRef = useRef<HTMLFormElement | null>(null)
@@ -364,7 +401,7 @@ export function ChatBar({
       const next = `${base}${sep}${value}`
 
       draftRef.current = next
-      aui.composer().setText(next)
+      setComposerText(next)
 
       const editor = editorRef.current
 
@@ -375,7 +412,7 @@ export function ChatBar({
 
       setFocusRequestId(id => id + 1)
     },
-    [aui]
+    [setComposerText]
   )
 
   useEffect(() => {
@@ -585,7 +622,7 @@ export function ChatBar({
     const nextDraft = `${currentDraft}${sep}${text}`
 
     draftRef.current = nextDraft
-    aui.composer().setText(nextDraft)
+    setComposerText(nextDraft)
 
     // Push the new text into the contentEditable editor directly. Setting the
     // assistant-ui composer state alone is not enough: the draft→editor sync
@@ -618,7 +655,7 @@ export function ChatBar({
     }
 
     draftRef.current = nextDraft
-    aui.composer().setText(nextDraft)
+    setComposerText(nextDraft)
     requestMainFocus()
 
     return true
@@ -704,7 +741,7 @@ export function ChatBar({
 
     if (nextDraft !== draftRef.current) {
       draftRef.current = nextDraft
-      aui.composer().setText(nextDraft)
+      setComposerText(nextDraft)
     }
 
     window.setTimeout(refreshTrigger, 0)
@@ -830,7 +867,7 @@ export function ChatBar({
       renderComposerContents(editor, prefix)
       placeCaretEnd(editor)
       draftRef.current = composerPlainText(editor)
-      aui.composer().setText(draftRef.current)
+      setComposerText(draftRef.current)
       closeTrigger()
       runAction()
       requestMainFocus()
@@ -858,7 +895,7 @@ export function ChatBar({
 
     const finish = () => {
       draftRef.current = composerPlainText(editor)
-      aui.composer().setText(draftRef.current)
+      setComposerText(draftRef.current)
       requestMainFocus()
       keepTriggerOpen ? window.setTimeout(refreshTrigger, 0) : closeTrigger()
     }
@@ -1310,17 +1347,56 @@ export function ChatBar({
   }
 
   const clearDraft = useCallback(() => {
-    aui.composer().setText('')
+    setComposerText('')
     draftRef.current = ''
 
     if (editorRef.current) {
       editorRef.current.replaceChildren()
     }
-  }, [aui])
+  }, [setComposerText])
+
+  // Hand a worktree off to the controller: open a fresh session anchored there,
+  // carrying the composer draft as its first turn. Clearing here means the draft
+  // travels to the new session instead of getting stashed under this one.
+  const openInWorktree = useCallback(
+    (path: string) => {
+      const text = draftRef.current
+      clearDraft()
+      clearComposerAttachments()
+      requestStartWorkSession(path, text)
+    },
+    [clearDraft]
+  )
+
+  // Branch off into a NEW worktree (base = branch name, or current HEAD). A
+  // create failure throws back to the row (which toasts) before we touch the
+  // draft; a missing cwd / remote backend no-ops (the row hides the affordance).
+  const handleBranchOff = useCallback(
+    async (branch: string, base?: string) => {
+      const repoPath = cwd?.trim()
+      const result = repoPath && (await startWorkInRepo(repoPath, { base, branch, name: branch }))
+
+      if (result) {
+        openInWorktree(result.path)
+      }
+    },
+    [cwd, openInWorktree]
+  )
+
+  const handleSwitchBranch = useCallback(
+    async (branch: string) => {
+      const repoPath = cwd?.trim()
+
+      if (repoPath) {
+        await switchBranchInRepo(repoPath, branch)
+      }
+    },
+    [cwd]
+  )
 
   const loadIntoComposer = (text: string, attachments: ComposerAttachment[]) => {
     draftRef.current = text
-    aui.composer().setText(text)
+    setComposerText(text)
     $composerAttachments.set(cloneAttachments(attachments))
 
     const editor = editorRef.current
@@ -1641,6 +1717,41 @@ export function ChatBar({
     }
   }, [autoDrainNext, busy, queuedPrompts.length])
 
+  // Esc cancels the in-flight turn when the CHAT has focus — not just the
+  // composer input (which has its own handler above). Clicking into the
+  // transcript and hitting Esc now stops the run, matching the Stop button.
+  // Intentional only: we bail if (a) the composer/another field already
+  // handled Esc (defaultPrevented), (b) focus is in any input/textarea/
+  // contenteditable (you're typing, not stopping), or (c) a dialog/popover is
+  // open — Esc must close that overlay, never double as canceling the stream
+  // behind it. A latest-handler ref keeps the listener registered once.
+  const escCancelRef = useRef<(event: globalThis.KeyboardEvent) => void>(() => {})
+  escCancelRef.current = (event: globalThis.KeyboardEvent) => {
+    if (event.key !== 'Escape' || event.defaultPrevented || !busy) {
+      return
+    }
+
+    const active = document.activeElement as HTMLElement | null
+    if (active && (active.tagName === 'INPUT' || active.tagName === 'TEXTAREA' || active.isContentEditable)) {
+      return
+    }
+
+    if (document.querySelector('[role="dialog"],[role="alertdialog"],[data-radix-popper-content-wrapper]')) {
+      return
+    }
+
+    event.preventDefault()
+    triggerHaptic('cancel')
+    void Promise.resolve(onCancel())
+  }
+
+  useEffect(() => {
+    const onKeyDown = (event: globalThis.KeyboardEvent) => escCancelRef.current(event)
+    window.addEventListener('keydown', onKeyDown)
+
+    return () => window.removeEventListener('keydown', onKeyDown)
+  }, [])
+
   // Queue-edit cleanup: on session swap the scope effect already stashed the
   // edit snapshot; only restore into the composer when still on the same scope.
   useEffect(() => {
@@ -1673,6 +1784,22 @@ export function ChatBar({
       .catch(restore)
   }
 
+  // External "submit this prompt" requests (e.g. the review pane's agent-ship
+  // button) route through the same send path. A ref keeps the listener stable
+  // while always calling the latest dispatchSubmit closure.
+  const dispatchSubmitRef = useRef(dispatchSubmit)
+  dispatchSubmitRef.current = dispatchSubmit
+
+  useEffect(
+    () =>
+      onComposerSubmitRequest(({ target, text }) => {
+        if (target === 'main' && !inputDisabled) {
+          dispatchSubmitRef.current(text)
+        }
+      }),
+    [inputDisabled]
+  )
+
   const submitDraft = () => {
     if (disabled) {
       return
@@ -1693,7 +1820,7 @@ export function ChatBar({
 
       if (domText !== draftRef.current) {
         draftRef.current = domText
-        aui.composer().setText(domText)
+        setComposerText(domText)
       }
     }
 
@@ -1812,6 +1939,24 @@ export function ChatBar({
     pendingResponse
   })
 
+  // The `composer.voice` hotkey (Ctrl+B) toggles the conversation. Starting
+  // with STT unconfigured lets the conversation surface its own "configure
+  // speech-to-text" notice rather than silently no-opping.
+  const toggleVoiceConversation = useCallback(() => {
+    if (disabled) {
+      return
+    }
+
+    if (voiceConversationActive) {
+      setVoiceConversationActive(false)
+      void conversation.end()
+    } else {
+      setVoiceConversationActive(true)
+    }
+  }, [conversation, disabled, voiceConversationActive])
+
+  useEffect(() => onComposerVoiceToggleRequest(toggleVoiceConversation), [toggleVoiceConversation])
+
   const contextMenu = (
     <ContextMenu
       onInsertText={insertText}
@@ -2048,7 +2193,7 @@ export function ChatBar({
           <div className="relative w-full rounded-[inherit]">
             <div
               className={cn(
-                'group/composer-surface relative z-4 isolate rounded-[inherit] border border-[color-mix(in_srgb,var(--dt-composer-ring)_calc(18%*var(--composer-ring-strength)),var(--dt-input))] transition-[border-color] duration-200 ease-out focus-within:border-[color-mix(in_srgb,var(--dt-composer-ring)_calc(45%*var(--composer-ring-strength)),transparent)]',
+                'group/composer-surface relative z-4 isolate grid grid-rows-[auto_1fr] overflow-hidden rounded-[inherit] border border-[color-mix(in_srgb,var(--dt-composer-ring)_calc(18%*var(--composer-ring-strength)),var(--dt-input))]',
                 COMPOSER_DROP_FADE_CLASS,
                 dragActive && COMPOSER_DROP_ACTIVE_CLASS
               )}
@@ -2063,6 +2208,12 @@ export function ChatBar({
                   composerSurfaceGlass
                 )}
               />
+              <CodingStatusRow
+                onBranchOff={handleBranchOff}
+                onOpen={toggleReview}
+                onOpenWorktree={openInWorktree}
+                onSwitchBranch={handleSwitchBranch}
+              />
               <div
                 className={cn(
                   'relative z-1 flex min-h-0 w-full flex-col gap-(--composer-row-gap) overflow-hidden rounded-[inherit] px-(--composer-surface-pad-x) py-(--composer-surface-pad-y) transition-opacity duration-200 ease-out',

apps/desktop/src/app/chat/composer/model-pill.tsx

@@ -5,6 +5,7 @@ import { ModelMenuCloseContext } from '@/app/shell/model-menu-panel'
 import { Button } from '@/components/ui/button'
 import { DropdownMenu, DropdownMenuContent, DropdownMenuTrigger } from '@/components/ui/dropdown-menu'
 import { GlyphSpinner } from '@/components/ui/glyph-spinner'
+import { Tip } from '@/components/ui/tooltip'
 import { useI18n } from '@/i18n'
 import { ChevronDown } from '@/lib/icons'
 import { formatModelStatusLabel } from '@/lib/model-status-label'
@@ -74,34 +75,36 @@ export function ModelPill({
 
   if (!model.modelMenuContent) {
     return (
-      <Button
-        aria-label={copy.openModelPicker}
-        className={pillClass}
-        disabled={disabled}
-        onClick={() => setModelPickerOpen(true)}
-        title={copy.openModelPicker}
-        type="button"
-        variant="ghost"
-      >
-        {label}
-      </Button>
-    )
-  }
-
-  return (
-    <DropdownMenu onOpenChange={setOpen} open={open}>
-      <DropdownMenuTrigger asChild>
+      <Tip label={copy.openModelPicker} side="top">
         <Button
-          aria-label={title}
+          aria-label={copy.openModelPicker}
           className={pillClass}
           disabled={disabled}
-          title={title}
+          onClick={() => setModelPickerOpen(true)}
           type="button"
           variant="ghost"
         >
           {label}
         </Button>
-      </DropdownMenuTrigger>
+      </Tip>
+    )
+  }
+
+  return (
+    <DropdownMenu onOpenChange={setOpen} open={open}>
+      <Tip label={title} side="top">
+        <DropdownMenuTrigger asChild>
+          <Button
+            aria-label={title}
+            className={pillClass}
+            disabled={disabled}
+            type="button"
+            variant="ghost"
+          >
+            {label}
+          </Button>
+        </DropdownMenuTrigger>
+      </Tip>
       <DropdownMenuContent align="end" className="w-64 p-0" side="top" sideOffset={8}>
         <ModelMenuCloseContext.Provider value={() => setOpen(false)}>
           {model.modelMenuContent}

apps/desktop/src/app/chat/composer/status-stack/coding-row.tsx

@@ -0,0 +1,324 @@
+import { useStore } from '@nanostores/react'
+import { memo, useEffect, useRef, useState } from 'react'
+
+import { StatusRow } from '@/components/chat/status-row'
+import { Button } from '@/components/ui/button'
+import { Codicon } from '@/components/ui/codicon'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle
+} from '@/components/ui/dialog'
+import { DiffCount } from '@/components/ui/diff-count'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger
+} from '@/components/ui/dropdown-menu'
+import { SanitizedInput } from '@/components/ui/sanitized-input'
+import { useI18n } from '@/i18n'
+import { gitRef } from '@/lib/sanitize'
+import { $repoStatus, $repoWorktrees } from '@/store/coding-status'
+import { notifyError } from '@/store/notifications'
+import { $newWorktreeRequest } from '@/store/projects'
+
+// Tiny uppercase section header, matching the composer "+" menu's labels.
+const MENU_SECTION = 'text-[0.625rem] font-semibold uppercase tracking-wider text-(--ui-text-tertiary)'
+
+interface CodingStatusRowProps {
+  /** Branch the current draft off into a fresh worktree + session, based on
+   *  `base` (a branch name; omitted = current HEAD). The composer owns the
+   *  draft, so it supplies the orchestration; the row just collects the new
+   *  branch name + base. Omitted (e.g. remote backend) hides the affordance. */
+  onBranchOff?: (branch: string, base?: string) => Promise<void>
+  /** Open the review pane (changed files + diffs). */
+  onOpen?: () => void
+  /** Jump into an existing worktree (open a fresh session anchored there). */
+  onOpenWorktree?: (path: string) => void
+  /** Switch the current repo checkout to another branch. */
+  onSwitchBranch?: (branch: string) => Promise<void>
+}
+
+/**
+ * The always-on coding-context row, the BASE of the composer status stack:
+ * current branch, dirty summary (+/-), and ahead/behind. A touch more prominent
+ * than the per-turn rows above it (larger branch label, accent glyph), and the
+ * entry point to the review pane. Hidden when the active session isn't in a
+ * local git repo (the probe returns null).
+ */
+export const CodingStatusRow = memo(function CodingStatusRow({
+  onBranchOff,
+  onOpen,
+  onOpenWorktree,
+  onSwitchBranch
+}: CodingStatusRowProps) {
+  const { t } = useI18n()
+  const s = t.statusStack.coding
+  const p = t.sidebar.projects
+  const status = useStore($repoStatus)
+  const worktrees = useStore($repoWorktrees)
+
+  const [branchOpen, setBranchOpen] = useState(false)
+  const [branchName, setBranchName] = useState('')
+  const [branchBase, setBranchBase] = useState<string | undefined>(undefined)
+  const [branchPending, setBranchPending] = useState(false)
+
+  // Open the name dialog for a chosen base. Deferred so the dropdown finishes
+  // closing before the dialog grabs focus (Radix focus-trap handoff races
+  // otherwise).
+  const startBranch = (base: string | undefined) => {
+    setBranchBase(base)
+    setBranchName('')
+    setTimeout(() => setBranchOpen(true), 0)
+  }
+
+  // Global ⌘⇧B (workspace.newWorktree): open the name dialog for a worktree off
+  // current HEAD. The rail only renders inside a repo, so the hotkey naturally
+  // no-ops elsewhere. Guarded by a token ref so it fires on the keypress, not on
+  // mount or unrelated re-renders.
+  const worktreeReq = useStore($newWorktreeRequest)
+  const lastWorktreeReqRef = useRef(worktreeReq)
+
+  useEffect(() => {
+    if (worktreeReq === lastWorktreeReqRef.current) {
+      return
+    }
+
+    lastWorktreeReqRef.current = worktreeReq
+
+    if (!onBranchOff) {
+      return
+    }
+
+    setBranchBase(undefined)
+    setBranchName('')
+    setBranchOpen(true)
+  }, [onBranchOff, worktreeReq])
+
+  const submitBranch = async () => {
+    const branch = branchName.trim()
+
+    if (branchPending || !branch || !onBranchOff) {
+      return
+    }
+
+    setBranchPending(true)
+
+    try {
+      await onBranchOff(branch, branchBase)
+      setBranchOpen(false)
+      setBranchName('')
+    } catch (err) {
+      notifyError(err, p.startWorkFailed)
+    } finally {
+      setBranchPending(false)
+    }
+  }
+
+  const switchToBranch = async (branch: string) => {
+    if (!onSwitchBranch) {
+      return
+    }
+
+    try {
+      await onSwitchBranch(branch)
+    } catch (err) {
+      notifyError(err, s.switchFailed(branch))
+    }
+  }
+
+  if (!status) {
+    return null
+  }
+
+  const branchLabel = status.detached ? s.detached : status.branch || s.noBranch
+  // The kebab offers branching off the trunk and/or the current branch. The
+  // worktree-add bases the new branch on `base` (a branch name; undefined =
+  // current HEAD). We dedupe so "on main" shows a single trunk entry, and fall
+  // back to a plain off-HEAD branch when no trunk is detected.
+  const current = status.detached ? null : status.branch
+  const branchTargets: { base: string | undefined; label: string }[] = []
+
+  // Current branch first (the 99% "branch off where I am"), then the trunk just
+  // below it ("New branch from main"), deduped when they're the same.
+  if (current) {
+    branchTargets.push({ base: current, label: s.branchOffFrom(current) })
+  }
+
+  if (status.defaultBranch && status.defaultBranch !== current) {
+    branchTargets.push({ base: status.defaultBranch, label: s.branchOffFrom(status.defaultBranch) })
+  }
+
+  if (branchTargets.length === 0) {
+    branchTargets.push({ base: undefined, label: s.newBranch })
+  }
+
+  const switchTarget = onSwitchBranch && current && status.defaultBranch && status.defaultBranch !== current ? status.defaultBranch : null
+
+  // Other worktrees to jump into — everything except the one we're already in
+  // (matched by its checked-out branch) and the bare/main placeholder entry.
+  const otherWorktrees = onOpenWorktree
+    ? worktrees.filter(w => w.path && !w.detached && w.branch && w.branch !== current)
+    : []
+
+  const hasLineDelta = status.added > 0 || status.removed > 0
+  // Untracked files carry no line delta vs HEAD, so surface them as a count when
+  // they're the only change (otherwise +/- tells the story).
+  const untrackedOnly = !hasLineDelta && status.untracked > 0
+
+  return (
+    <>
+      <StatusRow
+        // The base "where am I working" strip is part of the composer surface
+        // itself, so it inherits the composer's width and clipped top radius.
+        className="coding-status-bar min-h-7 rounded-t-[inherit] rounded-b-none border-b border-(--ui-stroke-tertiary) px-3.5 py-1.5 hover:bg-transparent"
+        // Static branch glyph — never the loading spinner. This row only renders
+        // once `status` exists, so a spinner here only ever fired on *refreshes*
+        // of an already-loaded repo (window focus, turn settle), reading as an
+        // annoying icon "blip" with no first-load value. Refreshes are silent.
+        leading={<Codicon className="text-(--ui-green)" name="git-branch" size="0.8rem" />}
+        onActivate={onOpen}
+      >
+        <div className="flex min-w-0 flex-1 items-center gap-1">
+          <span
+            className="min-w-0 truncate text-xs font-normal text-muted-foreground/92 transition-colors group-hover/status-row:text-foreground/90"
+            title={branchLabel}
+          >
+            {branchLabel}
+          </span>
+
+          {/* Branch actions kebab — same pattern as the session/worktree rows.
+              ALWAYS laid out; only its opacity flips on hover/focus/open, so
+              revealing it never reflows the row (no layout shift). pointer-events
+              follow opacity so the invisible trigger isn't clickable at rest. */}
+          {onBranchOff && (
+            <DropdownMenu>
+              <DropdownMenuTrigger asChild>
+                <Button
+                  aria-label={s.newBranch}
+                  className="pointer-events-none size-4 shrink-0 text-muted-foreground/60 opacity-0 transition hover:text-foreground group-hover/status-row:pointer-events-auto group-hover/status-row:opacity-100 group-focus-within/status-row:pointer-events-auto group-focus-within/status-row:opacity-100 data-[state=open]:pointer-events-auto data-[state=open]:opacity-100"
+                  onClick={event => event.stopPropagation()}
+                  onKeyDown={event => {
+                    // The row's onActivate also fires on Enter/Space; keep it from
+                    // opening the review pane when the kebab is the focus target.
+                    if (event.key === 'Enter' || event.key === ' ') {
+                      event.stopPropagation()
+                    }
+                  }}
+                  size="icon-xs"
+                  variant="ghost"
+                >
+                  <Codicon name="kebab-vertical" size="0.8rem" />
+                </Button>
+              </DropdownMenuTrigger>
+              {/* The row sits at the bottom of the screen (above the composer),
+                  so the menu opens upward. */}
+              <DropdownMenuContent align="end" className="w-60" side="top" sideOffset={6}>
+                <DropdownMenuLabel className={MENU_SECTION}>{s.newBranch}</DropdownMenuLabel>
+                {branchTargets.map(target => (
+                  <DropdownMenuItem key={target.base ?? '__head__'} onSelect={() => startBranch(target.base)}>
+                    <span className="truncate">{target.label}</span>
+                  </DropdownMenuItem>
+                ))}
+
+                {switchTarget && (
+                  <DropdownMenuItem onSelect={() => void switchToBranch(switchTarget)}>
+                    <span className="truncate">{s.switchTo(switchTarget)}</span>
+                  </DropdownMenuItem>
+                )}
+
+                <DropdownMenuSeparator />
+                <DropdownMenuLabel className={MENU_SECTION}>{s.worktrees}</DropdownMenuLabel>
+                {otherWorktrees.map(worktree => (
+                  <DropdownMenuItem key={worktree.path} onSelect={() => onOpenWorktree?.(worktree.path)}>
+                    <span className="truncate">{worktree.branch}</span>
+                  </DropdownMenuItem>
+                ))}
+                {/* Create a fresh worktree off the current HEAD (the generic
+                    "spin up a worktree here", mirroring the sidebar's + button). */}
+                <DropdownMenuItem onSelect={() => startBranch(undefined)}>
+                  <span className="truncate">{p.startWork}</span>
+                </DropdownMenuItem>
+              </DropdownMenuContent>
+            </DropdownMenu>
+          )}
+        </div>
+
+        {(status.ahead > 0 || status.behind > 0) && (
+          <span className="ml-auto flex shrink-0 items-center gap-1.5 text-[0.68rem] leading-4 text-muted-foreground/75 tabular-nums">
+            {status.ahead > 0 && (
+              <span className="flex items-center gap-0.5" title={s.ahead(status.ahead)}>
+                <span aria-hidden>↑</span>
+                {status.ahead}
+              </span>
+            )}
+            {status.behind > 0 && (
+              <span className="flex items-center gap-0.5" title={s.behind(status.behind)}>
+                <span aria-hidden>↓</span>
+                {status.behind}
+              </span>
+            )}
+          </span>
+        )}
+
+        {hasLineDelta ? (
+          <DiffCount
+            added={status.added}
+            className={`text-[0.72rem] leading-4 ${status.ahead === 0 && status.behind === 0 ? 'ml-auto' : ''}`}
+            removed={status.removed}
+          />
+        ) : untrackedOnly ? (
+          <span
+            className={`shrink-0 text-[0.72rem] leading-4 text-amber-500/90 ${status.ahead === 0 && status.behind === 0 ? 'ml-auto' : ''}`}
+          >
+            {s.changed(status.untracked)}
+          </span>
+        ) : null}
+      </StatusRow>
+
+      <Dialog onOpenChange={open => !branchPending && setBranchOpen(open)} open={branchOpen}>
+        <DialogContent className="max-w-md">
+          <DialogHeader>
+            <DialogTitle>{p.newWorktreeTitle}</DialogTitle>
+            <DialogDescription>
+              {p.newWorktreeDesc}
+              {branchBase && (
+                <span className="mt-1 block text-(--ui-text-secondary)">{s.branchOffFrom(branchBase)}</span>
+              )}
+            </DialogDescription>
+          </DialogHeader>
+          <SanitizedInput
+            autoFocus
+            disabled={branchPending}
+            onKeyDown={event => {
+              if (event.key === 'Enter') {
+                event.preventDefault()
+                void submitBranch()
+              } else if (event.key === 'Escape') {
+                setBranchOpen(false)
+              }
+            }}
+            onValueChange={setBranchName}
+            placeholder={p.branchPlaceholder}
+            sanitize={gitRef}
+            value={branchName}
+          />
+          <DialogFooter>
+            <Button disabled={branchPending} onClick={() => setBranchOpen(false)} type="button" variant="ghost">
+              {t.common.cancel}
+            </Button>
+            <Button disabled={branchPending || !branchName.trim()} onClick={() => void submitBranch()} type="button">
+              {p.startWork}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </>
+  )
+})

apps/desktop/src/app/chat/composer/status-stack/index.tsx

@@ -19,15 +19,30 @@ import {
   type StatusGroup,
   stopBackgroundProcess
 } from '@/store/composer-status'
+import { $previewStatusBySession, dismissPreviewArtifact } from '@/store/preview-status'
 import { $threadScrolledUp } from '@/store/thread-scroll'
 import { openSessionInNewWindow } from '@/store/windows'
 
+import { PreviewStatusRow } from './preview-row'
 import { StatusItemRow } from './status-row'
 
 // Slow safety-net poll for silent exits (processes without notify_on_complete
 // emit no event when they die). Only armed while a running row is on screen.
 const BACKGROUND_POLL_MS = 5_000
 
+// A localhost/loopback preview is only meaningful while its dev server is up, so
+// we tie it to a live background process rather than persisting dismissals or
+// letting dead URLs pile up. File previews (a real on-disk artifact) stand alone.
+const isLocalhostPreview = (target: string): boolean => /\b(?:localhost|127\.0\.0\.1|0\.0\.0\.0)\b/i.test(target)
+
+// Real codicons per group (no sparkles): a checklist for todos, a bot for
+// subagents, a background process glyph for background tasks.
+const GROUP_ICON: Record<StatusGroup['type'], string> = {
+  todo: 'checklist',
+  subagent: 'hubot',
+  background: 'server-process'
+}
+
 const groupLabel = (group: StatusGroup, s: Translations['statusStack']) => {
   if (group.type === 'todo') {
     return s.todos(group.items.filter(i => i.todoStatus === 'completed').length, group.items.length)
@@ -52,6 +67,7 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
   const { t } = useI18n()
   const navigate = useNavigate()
   const itemsBySession = useStore($statusItemsBySession)
+  const previewsBySession = useStore($previewStatusBySession)
   const scrolledUp = useStore($threadScrolledUp)
 
   const groups = useMemo(
@@ -59,6 +75,8 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
     [itemsBySession, sessionId]
   )
 
+  const previews = sessionId ? (previewsBySession[sessionId] ?? []) : []
+
   // Seed from the registry on session open; event-driven refreshes (terminal /
   // process tool completions) live in use-message-stream.
   useEffect(() => {
@@ -69,6 +87,10 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
 
   const hasRunningBackground = groups.some(g => g.type === 'background' && g.items.some(i => i.state === 'running'))
 
+  // Drop localhost previews once no dev server is left running — that's what made
+  // dead `localhost:5174` chips stick around. On-disk file previews are kept.
+  const visiblePreviews = previews.filter(item => hasRunningBackground || !isLocalhostPreview(item.target))
+
   useEffect(() => {
     if (!sessionId || !hasRunningBackground) {
       return
@@ -84,6 +106,18 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
   const openSubagent = (item: ComposerStatusItem) =>
     item.sessionId ? void openSessionInNewWindow(item.sessionId, { watch: true }) : openAgents()
 
+  // Preview links live as child rows of the background group — a localhost dev
+  // server and its preview are the same thing — so they no longer float as an
+  // odd, differently-indented standalone block under the stack.
+  const previewRows =
+    visiblePreviews.length > 0 && sessionId
+      ? visiblePreviews.map(item => (
+          <PreviewStatusRow item={item} key={item.id} onDismiss={id => dismissPreviewArtifact(sessionId, id)} />
+        ))
+      : []
+
+  const hasBackgroundGroup = groups.some(g => g.type === 'background')
+
   const sections: { key: string; node: ReactNode }[] = groups.map(group => ({
     key: group.type,
     node: (
@@ -102,11 +136,7 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
           ) : undefined
         }
         defaultCollapsed={group.type !== 'todo'}
-        icon={
-          group.type === 'todo' ? (
-            <Codicon className="text-muted-foreground/70" name="checklist" size="0.8rem" />
-          ) : undefined
-        }
+        icon={<Codicon className="text-muted-foreground/70" name={GROUP_ICON[group.type]} size="0.8rem" />}
         label={groupLabel(group, t.statusStack)}
       >
         {group.items.map(item => (
@@ -115,13 +145,23 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
             key={item.id}
             onDismiss={sessionId ? id => dismissBackgroundProcess(sessionId, id) : undefined}
             onOpen={() => openSubagent(item)}
-            onStop={sessionId ? id => stopBackgroundProcess(sessionId, id) : undefined}
+            onStop={sessionId ? id => void stopBackgroundProcess(sessionId, id) : undefined}
           />
         ))}
+        {group.type === 'background' && previewRows}
       </StatusSection>
     )
   }))
 
+  // No background group to host them (e.g. a standalone on-disk file preview):
+  // keep the previews as their own row block so they don't disappear.
+  if (previewRows.length > 0 && !hasBackgroundGroup) {
+    sections.push({
+      key: 'preview',
+      node: <div className="px-1 py-0.5">{previewRows}</div>
+    })
+  }
+
   if (queue) {
     sections.push({ key: 'queue', node: queue })
   }
@@ -170,12 +210,10 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
 
   return (
     <div
-      // Sits above the composer (bottom-full), nudged down by the shell's 0.5rem
-      // top pad (pt-2 on composer-root) plus 1px so its bottom edge overlaps the
-      // composer surface's top border. z BELOW the surface (z-4) so the surface's
-      // top border paints over our transparent bottom border — one seam, no
-      // double line.
-      className="absolute inset-x-0 bottom-full z-3 max-h-[40vh] translate-y-[calc(0.5rem+1px)] overflow-y-auto"
+      // Sits in the overlay lane above the composer. The composer root has pt-2
+      // before the actual surface; translate by that amount so the stack returns
+      // to its original attachment point without intruding into the repo strip.
+      className="absolute inset-x-0 bottom-full z-3 max-h-[40vh] translate-y-2 overflow-y-auto"
       onPointerDownCapture={() => blurComposerInput()}
       ref={stackRef}
     >
@@ -185,17 +223,19 @@ export function ComposerStatusStack({ queue, sessionId }: ComposerStatusStackPro
           Rounded top, square bottom; the bottom border is TRANSPARENT — the
           composer surface's visible top border (which sits at a higher z) is the
           single shared seam, so the two read as one fused capsule. */}
-      <div className={cn(composerDockCard('top'), 'mx-2 rounded-b-none border-b border-b-transparent pt-0.5 pb-1')}>
-        <div
-          className={cn(
-            'transition-opacity duration-200 ease-out',
-            scrolledUp ? 'opacity-30 group-hover/composer:opacity-100' : 'opacity-100'
-          )}
-        >
-          {sections.map(section => (
-            <div key={section.key}>{section.node}</div>
-          ))}
-        </div>
+      <div
+        className={cn(
+          composerDockCard('top'),
+          // Inset (mx-2) so the stack reads slightly narrower than the composer
+          // surface below it — the original look.
+          'mx-2 overflow-hidden rounded-b-none border-b border-b-transparent pt-0.5',
+          'transition-opacity duration-200 ease-out',
+          scrolledUp ? 'opacity-30 group-hover/composer:opacity-100' : 'opacity-100'
+        )}
+      >
+        {sections.map(section => (
+          <div key={section.key}>{section.node}</div>
+        ))}
       </div>
     </div>
   )

apps/desktop/src/app/chat/composer/status-stack/preview-row.tsx

@@ -0,0 +1,121 @@
+import { useStore } from '@nanostores/react'
+import { memo, useState } from 'react'
+
+import { StatusRow } from '@/components/chat/status-row'
+import { Button } from '@/components/ui/button'
+import { Codicon } from '@/components/ui/codicon'
+import { Tip } from '@/components/ui/tooltip'
+import { useI18n } from '@/i18n'
+import { normalizeOrLocalPreviewTarget } from '@/lib/local-preview'
+import { cn } from '@/lib/utils'
+import { PREVIEW_PANE_ID } from '@/store/layout'
+import { notifyError } from '@/store/notifications'
+import { $paneOpen } from '@/store/panes'
+import { $previewTarget, dismissPreviewTarget, setCurrentSessionPreviewTarget } from '@/store/preview'
+import { type PreviewArtifact } from '@/store/preview-status'
+
+interface PreviewStatusRowProps {
+  item: PreviewArtifact
+  onDismiss: (id: string) => void
+}
+
+/** One detected artifact, single line, always visible: filename + open + close. */
+export const PreviewStatusRow = memo(function PreviewStatusRow({ item, onDismiss }: PreviewStatusRowProps) {
+  const { t } = useI18n()
+  const activePreview = useStore($previewTarget)
+  const previewPaneOpen = useStore($paneOpen(PREVIEW_PANE_ID))
+  const [opening, setOpening] = useState(false)
+  const isOpen = activePreview?.source === item.target && previewPaneOpen
+
+  const resolveTarget = async () => {
+    const target = await normalizeOrLocalPreviewTarget(item.target, item.cwd || undefined)
+
+    if (!target) {
+      throw new Error(`Could not open preview target: ${item.target}`)
+    }
+
+    return target
+  }
+
+  const togglePreview = async () => {
+    if (opening) {
+      return
+    }
+
+    if (isOpen) {
+      dismissPreviewTarget()
+
+      return
+    }
+
+    setOpening(true)
+
+    try {
+      setCurrentSessionPreviewTarget(await resolveTarget(), 'tool-result', item.target)
+    } catch (error) {
+      notifyError(error, t.preview.unavailable)
+    } finally {
+      setOpening(false)
+    }
+  }
+
+  const openInBrowser = async () => {
+    try {
+      const bridge = window.hermesDesktop?.openPreviewInBrowser
+
+      if (!bridge) {
+        throw new Error('Desktop preview browser bridge is unavailable')
+      }
+
+      await bridge((await resolveTarget()).url)
+    } catch (error) {
+      notifyError(error, t.preview.unavailable)
+    }
+  }
+
+  return (
+    <StatusRow
+      leading={
+        <Codicon aria-hidden className={cn('text-muted-foreground/70', opening && 'animate-pulse')} name="globe" size="0.8rem" />
+      }
+      // Plain click opens the link in the browser; ⌘/Ctrl-click opens it in the
+      // in-app preview pane instead. (isOpen still toggles the pane closed.)
+      onActivate={event => {
+        if (event.metaKey || event.ctrlKey) {
+          void togglePreview()
+        } else {
+          void openInBrowser()
+        }
+      }}
+      trailing={
+        <Tip label={t.statusStack.dismiss}>
+          <Button
+            aria-label={t.statusStack.dismiss}
+            className="-my-1 size-4 rounded-md text-muted-foreground/60 hover:text-foreground/90"
+            onClick={event => {
+              event.stopPropagation()
+              onDismiss(item.id)
+            }}
+            size="icon-xs"
+            type="button"
+            variant="ghost"
+          >
+            <Codicon name="close" size="0.75rem" />
+          </Button>
+        </Tip>
+      }
+      trailingVisible
+    >
+      <Tip
+        label={
+          <span className="flex flex-col gap-0.5">
+            <span>{item.target}</span>
+            <span className="opacity-70">{t.preview.linkHint}</span>
+          </span>
+        }
+      >
+        <span className="min-w-0 max-w-[18rem] truncate text-[0.73rem] leading-4 text-foreground/92">{item.label}</span>
+      </Tip>
+    </StatusRow>
+  )
+})

apps/desktop/src/app/chat/composer/status-stack/status-row.tsx

@@ -8,7 +8,6 @@ import { DisclosureCaret } from '@/components/ui/disclosure-caret'
 import { GlyphSpinner } from '@/components/ui/glyph-spinner'
 import { Tip } from '@/components/ui/tooltip'
 import { type Translations, useI18n } from '@/i18n'
-import { ArrowUpRight, X } from '@/lib/icons'
 import type { TodoStatus } from '@/lib/todos'
 import { cn } from '@/lib/utils'
 import type { ComposerStatusItem } from '@/store/composer-status'
@@ -50,7 +49,7 @@ function leadingGlyph(item: ComposerStatusItem, s: Translations['statusStack']):
     return (
       <GlyphSpinner
         ariaLabel={s.running}
-        className="text-[0.9rem] leading-none text-muted-foreground/80"
+        className="text-[0.85rem] leading-none text-muted-foreground/80"
         spinner="braille"
       />
     )
@@ -117,11 +116,11 @@ export const StatusItemRow = memo(function StatusItemRow({ item, onDismiss, onOp
                 type="button"
                 variant="ghost"
               >
-                <X size={12} />
+                <Codicon name="close" size="0.75rem" />
               </Button>
             </Tip>
           ) : canOpen ? (
-            <ArrowUpRight aria-hidden className="size-3.5 text-muted-foreground/55" />
+            <Codicon aria-hidden className="text-muted-foreground/55" name="link-external" size="0.85rem" />
           ) : undefined
         }
       >

apps/desktop/src/app/chat/index.tsx

@@ -88,7 +88,10 @@ interface ChatViewProps extends Omit<React.ComponentProps<'div'>, 'onSubmit'> {
   onThreadMessagesChange: (messages: readonly ThreadMessage[]) => void
   onEdit: (message: AppendMessage) => Promise<void>
   onReload: (parentId: string | null) => Promise<void>
-  onRestoreToMessage?: (messageId: string) => Promise<void>
+  onRestoreToMessage?: (
+    messageId: string,
+    target?: { text?: string; userOrdinal?: number | null }
+  ) => Promise<void>
   onRetryResume: (sessionId: string) => void
   onTranscribeAudio?: (audio: Blob) => Promise<string>
   onDismissError?: (messageId: string) => void

apps/desktop/src/app/chat/right-rail/preview-file.tsx

@@ -6,7 +6,7 @@ import type {
   MouseEvent as ReactMouseEvent,
   ReactNode
 } from 'react'
-import { useEffect, useMemo, useState } from 'react'
+import { Fragment, useEffect, useMemo, useState } from 'react'
 import ShikiHighlighter from 'react-shiki'
 import { Streamdown } from 'streamdown'
 
@@ -14,15 +14,21 @@ import { requestComposerFocus, requestComposerInsertRefs } from '@/app/chat/comp
 import { droppedFileInlineRef } from '@/app/chat/composer/inline-refs'
 import { HERMES_PATHS_MIME } from '@/app/chat/hooks/use-composer-actions'
 import { isAddSelectionShortcut } from '@/app/right-sidebar/terminal/selection'
+import { FileDiffPanel } from '@/components/chat/diff-lines'
+import { chunkTextLines, useFixedRowWindow } from '@/components/chat/fixed-row-window'
 import { PageLoader } from '@/components/page-loader'
 import { translateNow, useI18n } from '@/i18n'
-import { readDesktopFileDataUrl, readDesktopFileText } from '@/lib/desktop-fs'
+import { desktopFileDiff, desktopGitRoot, readDesktopFileDataUrl, readDesktopFileText } from '@/lib/desktop-fs'
+import { shikiLanguageForFilename } from '@/lib/markdown-code'
 import { cn } from '@/lib/utils'
 import type { PreviewTarget } from '@/store/preview'
 import { $currentCwd } from '@/store/session'
 
 const SHIKI_THEME = { dark: 'github-dark-default', light: 'github-light-default' } as const
 const TEXT_PREVIEW_MAX_BYTES = 512 * 1024
+const SOURCE_CHUNK_LINES = 200
+const SOURCE_LINE_PX = 20
+const SOURCE_OVERSCAN_LINES = 400
 
 type EmptyStateTone = 'neutral' | 'warning'
 
@@ -126,6 +132,8 @@ interface LocalPreviewState {
   binary?: boolean
   byteSize?: number
   dataUrl?: string
+  /** Working-tree-vs-HEAD unified diff, when the file has uncommitted changes. */
+  diff?: string
   error?: string
   language?: string
   loading: boolean
@@ -299,28 +307,44 @@ function MarkdownPreview({ text }: { text: string }) {
   )
 }
 
-function PreviewToggle({ asSource, onToggle }: { asSource: boolean; onToggle: () => void }) {
+function PreviewModeSwitcher({
+  active,
+  modes,
+  onSelect
+}: {
+  active: PreviewViewMode
+  modes: PreviewViewMode[]
+  onSelect: (mode: PreviewViewMode) => void
+}) {
   const { t } = useI18n()
 
+  const label: Record<PreviewViewMode, string> = {
+    diff: t.preview.diff,
+    rendered: t.preview.renderedPreview,
+    source: t.preview.source
+  }
+
   return (
-    <div className="sticky top-0 z-10 flex justify-end border-b border-border/40 bg-transparent px-3 py-1 backdrop-blur">
-      <button
-        className="text-[0.625rem] font-bold text-muted-foreground underline decoration-current/20 underline-offset-4 transition-colors hover:text-foreground"
-        onClick={onToggle}
-        type="button"
-      >
-        {asSource ? t.preview.renderedPreview : t.preview.source}
-      </button>
+    <div className="flex shrink-0 justify-end gap-3 border-b border-border/40 px-3 py-1">
+      {modes.map(mode => (
+        <button
+          className={cn(
+            'text-[0.625rem] font-bold underline-offset-4 transition-colors',
+            mode === active
+              ? 'text-foreground underline decoration-current/30'
+              : 'text-muted-foreground hover:text-foreground'
+          )}
+          key={mode}
+          onClick={() => onSelect(mode)}
+          type="button"
+        >
+          {label[mode]}
+        </button>
+      ))}
     </div>
   )
 }
 
-// Gutter and Shiki output share `font-mono text-xs leading-relaxed py-3` so
-// each line aligns vertically. The selection overlay relies on the same
-// `text-xs * leading-relaxed = 1.21875rem` line-height to position itself.
-const SOURCE_LINE_HEIGHT_REM = 1.21875
-const SOURCE_PAD_Y_REM = 0.75
-
 interface LineSelection {
   end: number
   start: number
@@ -337,7 +361,18 @@ function startLineDrag(event: ReactDragEvent<HTMLElement>, filePath: string, { e
 
 function SourceView({ filePath, language, text }: { filePath: string; language: string; text: string }) {
   const { t } = useI18n()
-  const lineCount = useMemo(() => Math.max(1, text.split('\n').length), [text])
+  const chunks = useMemo(() => chunkTextLines(text, SOURCE_CHUNK_LINES), [text])
+  const lastChunk = chunks.at(-1)
+  const totalLines = lastChunk ? lastChunk.start + lastChunk.lines.length : 0
+
+  const { afterRows, beforeRows, endChunk, onScroll, scrollerRef, startChunk } = useFixedRowWindow({
+    overscanRows: SOURCE_OVERSCAN_LINES,
+    rowPx: SOURCE_LINE_PX,
+    rowsPerChunk: SOURCE_CHUNK_LINES,
+    totalRows: totalLines
+  })
+
+  const visibleChunks = chunks.slice(startChunk, endChunk + 1)
   const [selection, setSelection] = useState<LineSelection | null>(null)
   const inSelection = (line: number) => selection != null && line >= selection.start && line <= selection.end
 
@@ -394,69 +429,76 @@ function SourceView({ filePath, language, text }: { filePath: string; language:
   }, [filePath, selection])
 
   return (
-    <div className="grid min-w-max grid-cols-[auto_minmax(0,1fr)] font-mono text-xs leading-relaxed">
-      <div className="select-none py-3 text-right text-muted-foreground/55">
-        {Array.from({ length: lineCount }, (_, index) => {
-          const line = index + 1
-          const selected = inSelection(line)
-
-          return (
-            <div
-              className={cn(
-                'cursor-pointer px-3 tabular-nums transition-colors',
-                selected
-                  ? 'bg-amber-200/45 text-amber-900 dark:bg-amber-300/20 dark:text-amber-100'
-                  : 'hover:text-foreground'
-              )}
-              draggable
-              key={line}
-              onClick={event => handleLineClick(event, line)}
-              onDragStart={event => handleDragStart(event, line)}
-              title={t.preview.sourceLineTitle}
-            >
-              {line}
-            </div>
-          )
-        })}
-      </div>
-      <div
-        className="relative [&_pre]:m-0 [&_pre]:px-3 [&_pre]:py-3 [&_pre]:bg-transparent!"
-        data-selectable-text="true"
-      >
-        {selection && (
-          <div
-            aria-hidden
-            className="pointer-events-none absolute inset-x-0 bg-amber-200/35 dark:bg-amber-300/10"
-            style={{
-              top: `calc(${SOURCE_PAD_Y_REM}rem + ${selection.start - 1} * ${SOURCE_LINE_HEIGHT_REM}rem)`,
-              height: `calc(${selection.end - selection.start + 1} * ${SOURCE_LINE_HEIGHT_REM}rem)`
-            }}
-          />
+    <div className="h-full overflow-auto" onScroll={onScroll} ref={scrollerRef}>
+      <div className="grid min-w-max grid-cols-[auto_minmax(0,1fr)] font-mono text-[0.7rem] leading-relaxed">
+        {beforeRows > 0 && (
+          <div aria-hidden className="col-span-2" style={{ height: beforeRows * SOURCE_LINE_PX }} />
+        )}
+        {visibleChunks.map(chunk => (
+          <Fragment key={chunk.start}>
+            <div className="select-none text-right text-muted-foreground/55">
+              {chunk.lines.map((_lineText, offset) => {
+                const line = chunk.start + offset + 1
+                const selected = inSelection(line)
+
+                return (
+                  <div
+                    className={cn(
+                      'h-5 w-9 cursor-pointer pr-2 leading-5 tabular-nums transition-colors',
+                      selected
+                        ? 'bg-amber-200/45 text-amber-900 dark:bg-amber-300/20 dark:text-amber-100'
+                        : 'hover:text-foreground'
+                    )}
+                    draggable
+                    key={line}
+                    onClick={event => handleLineClick(event, line)}
+                    onDragStart={event => handleDragStart(event, line)}
+                    title={t.preview.sourceLineTitle}
+                  >
+                    {line}
+                  </div>
+                )
+              })}
+            </div>
+            <div className="preview-source-code min-w-0 [&_pre]:m-0" data-selectable-text="true">
+              <ShikiHighlighter
+                addDefaultStyles={false}
+                as="div"
+                defaultColor="light-dark()"
+                delay={80}
+                language={language || 'text'}
+                showLanguage={false}
+                theme={SHIKI_THEME}
+              >
+                {chunk.text}
+              </ShikiHighlighter>
+            </div>
+          </Fragment>
+        ))}
+        {afterRows > 0 && (
+          <div aria-hidden className="col-span-2" style={{ height: afterRows * SOURCE_LINE_PX }} />
         )}
-        <ShikiHighlighter
-          addDefaultStyles={false}
-          as="div"
-          defaultColor="light-dark()"
-          delay={80}
-          language={language || 'text'}
-          showLanguage={false}
-          theme={SHIKI_THEME}
-        >
-          {text}
-        </ShikiHighlighter>
       </div>
     </div>
   )
 }
 
+type PreviewViewMode = 'diff' | 'rendered' | 'source'
+
 export function LocalFilePreview({ reloadKey, target }: { reloadKey: number; target: PreviewTarget }) {
   const { t } = useI18n()
   const [state, setState] = useState<LocalPreviewState>({ loading: true })
   const [forcePreview, setForcePreview] = useState(false)
-  const [renderMarkdownAsSource, setRenderMarkdownAsSource] = useState(false)
+  // User-picked view; null = auto (diff when changed, else rendered markdown,
+  // else source). Reset when the previewed file changes.
+  const [userMode, setUserMode] = useState<null | PreviewViewMode>(null)
   const filePath = filePathForTarget(target)
   const isImage = target.previewKind === 'image'
 
+  useEffect(() => {
+    setUserMode(null)
+  }, [filePath, reloadKey])
+
   // HTML files are rendered as source code, not in a webview - so they take
   // the same path as plain text files. `previewKind === 'binary'` arrives
   // when the file is forcibly previewed past the binary refusal screen.
@@ -508,6 +550,22 @@ export function LocalFilePreview({ reloadKey, target }: { reloadKey: number; tar
             text: shouldBlock ? undefined : result.text,
             truncated: result.truncated
           })
+
+          // Best-effort: fetch the file's working-tree-vs-HEAD diff so the
+          // preview can offer a DIFF view when there are uncommitted changes.
+          // Empty (clean file / not a repo / remote) just hides the option.
+          if (!shouldBlock) {
+            try {
+              const root = await desktopGitRoot(filePath)
+              const diff = root ? await desktopFileDiff(root, filePath) : ''
+
+              if (active && diff.trim()) {
+                setState(prev => (prev.text === result.text ? { ...prev, diff } : prev))
+              }
+            } catch {
+              // No diff available; the preview just shows source.
+            }
+          }
         }
       } catch (error) {
         if (active) {
@@ -571,21 +629,50 @@ export function LocalFilePreview({ reloadKey, target }: { reloadKey: number; tar
 
   if (isText && state.text !== undefined) {
     const isMarkdown = (state.language || target.language) === 'markdown'
-    const showRendered = isMarkdown && !renderMarkdownAsSource
+    const hasDiff = Boolean(state.diff && state.diff.trim())
+    // Order the toggle reads left→right; default lands on the most useful view.
+    const modes: PreviewViewMode[] = []
+
+    if (isMarkdown) {
+      modes.push('rendered')
+    }
+
+    modes.push('source')
+
+    if (hasDiff) {
+      modes.push('diff')
+    }
+
+    const autoMode: PreviewViewMode = hasDiff ? 'diff' : isMarkdown ? 'rendered' : 'source'
+    const mode = userMode && modes.includes(userMode) ? userMode : autoMode
 
     return (
-      <div className="h-full overflow-auto bg-transparent">
+      <div className="flex h-full flex-col overflow-hidden bg-transparent">
         {state.truncated && (
           <div className="border-b border-border/60 bg-muted/35 px-3 py-1.5 text-[0.68rem] text-muted-foreground">
             {t.preview.truncated}
           </div>
         )}
-        {isMarkdown && <PreviewToggle asSource={!showRendered} onToggle={() => setRenderMarkdownAsSource(s => !s)} />}
-        {showRendered ? (
-          <MarkdownPreview text={state.text} />
-        ) : (
-          <SourceView filePath={filePath} language={state.language || 'text'} text={state.text} />
-        )}
+        {modes.length > 1 && <PreviewModeSwitcher active={mode} modes={modes} onSelect={setUserMode} />}
+        <div className="min-h-0 flex-1 overflow-auto">
+          {mode === 'rendered' ? (
+            <MarkdownPreview text={state.text} />
+          ) : mode === 'diff' ? (
+            <FileDiffPanel
+              className="mx-0 mb-0 h-full max-h-none"
+              diff={state.diff ?? ''}
+              fullText={state.text}
+              path={filePath}
+              showLineNumbers
+            />
+          ) : (
+            <SourceView
+              filePath={filePath}
+              language={shikiLanguageForFilename(filePath) || state.language || 'text'}
+              text={state.text}
+            />
+          )}
+        </div>
       </div>
     )
   }

apps/desktop/src/app/chat/right-rail/preview.tsx

@@ -3,10 +3,19 @@ import { useEffect, useMemo } from 'react'
 
 import type { SetTitlebarToolGroup } from '@/app/shell/titlebar-controls'
 import { Codicon } from '@/components/ui/codicon'
+import {
+  ContextMenu,
+  ContextMenuContent,
+  ContextMenuItem,
+  ContextMenuSeparator,
+  ContextMenuTrigger
+} from '@/components/ui/context-menu'
 import { Tip } from '@/components/ui/tooltip'
 import { translateNow, useI18n } from '@/i18n'
+import { formatCombo } from '@/lib/keybinds/combo'
 import { cn } from '@/lib/utils'
 import {
+  $panesFlipped,
   $rightRailActiveTabId,
   RIGHT_RAIL_PREVIEW_TAB_ID,
   type RightRailTabId,
@@ -16,8 +25,10 @@ import {
   $filePreviewTabs,
   $previewReloadRequest,
   $previewTarget,
+  closeOtherRightRailTabs,
   closeRightRail,
   closeRightRailTab,
+  closeRightRailTabsToRight,
   type PreviewTarget
 } from '@/store/preview'
 
@@ -56,6 +67,7 @@ export function ChatPreviewRail({ onRestartServer, setTitlebarToolGroup }: ChatP
   const { t } = useI18n()
   const previewReloadRequest = useStore($previewReloadRequest)
   const activeTabId = useStore($rightRailActiveTabId)
+  const panesFlipped = useStore($panesFlipped)
   const filePreviewTabs = useStore($filePreviewTabs)
   const previewTarget = useStore($previewTarget)
 
@@ -82,68 +94,92 @@ export function ChatPreviewRail({ onRestartServer, setTitlebarToolGroup }: ChatP
   const isPreview = activeTab.id === RIGHT_RAIL_PREVIEW_TAB_ID
 
   return (
-    <aside className="relative flex h-full w-full min-w-0 flex-col overflow-hidden border-l border-(--ui-stroke-tertiary) bg-(--ui-editor-surface-background) text-(--ui-text-tertiary)">
+    <aside
+      className={cn(
+        'relative flex h-full w-full min-w-0 flex-col overflow-hidden border-(--ui-stroke-tertiary) bg-(--ui-editor-surface-background) text-(--ui-text-tertiary)',
+        panesFlipped ? 'border-r' : 'border-l'
+      )}
+    >
       <div className="group/rail-tabs flex h-(--titlebar-height) shrink-0 border-b border-(--ui-stroke-tertiary) bg-(--ui-sidebar-surface-background)">
         <div
           className="flex min-w-0 flex-1 overflow-x-auto overflow-y-hidden overscroll-x-contain [-ms-overflow-style:none] [scrollbar-width:none] [&::-webkit-scrollbar]:hidden"
           role="tablist"
         >
-          {tabs.map(tab => {
+          {tabs.map((tab, index) => {
             const active = tab.id === activeTab.id
+            const hasOthers = tabs.length > 1
+            const hasTabsToRight = index < tabs.length - 1
 
             return (
-              <div
-                className={cn(
-                  'group/tab relative flex h-full min-w-0 max-w-48 shrink-0 items-center text-[0.6875rem] font-medium [-webkit-app-region:no-drag] last:border-r last:border-(--ui-stroke-quaternary)',
-                  active
-                    ? 'bg-(--ui-editor-surface-background) text-foreground [--tab-bg:var(--ui-editor-surface-background)]'
-                    : 'border-r border-(--ui-stroke-quaternary) text-(--ui-text-tertiary) [--tab-bg:var(--ui-sidebar-surface-background)] hover:bg-(--chrome-action-hover) hover:text-foreground'
-                )}
-                key={tab.id}
-                // Middle-click closes the tab, matching browser/IDE muscle
-                // memory. `onMouseDown` swallows the middle-button press so
-                // Chromium doesn't switch into autoscroll mode.
-                onAuxClick={event => {
-                  if (event.button !== 1) {
-                    return
-                  }
+              <ContextMenu key={tab.id}>
+                <ContextMenuTrigger asChild>
+                  <div
+                    className={cn(
+                      'group/tab relative flex h-full min-w-0 max-w-48 shrink-0 items-center text-[0.6875rem] font-medium [-webkit-app-region:no-drag] last:border-r last:border-(--ui-stroke-quaternary)',
+                      active
+                        ? 'bg-(--ui-editor-surface-background) text-foreground [--tab-bg:var(--ui-editor-surface-background)]'
+                        : 'border-r border-(--ui-stroke-quaternary) text-(--ui-text-tertiary) [--tab-bg:var(--ui-sidebar-surface-background)] hover:bg-(--chrome-action-hover) hover:text-foreground'
+                    )}
+                    // Middle-click closes the tab, matching browser/IDE muscle
+                    // memory. `onMouseDown` swallows the middle-button press so
+                    // Chromium doesn't switch into autoscroll mode.
+                    onAuxClick={event => {
+                      if (event.button !== 1) {
+                        return
+                      }
 
-                  event.preventDefault()
-                  closeRightRailTab(tab.id)
-                }}
-                onMouseDown={event => {
-                  if (event.button === 1) {
-                    event.preventDefault()
-                  }
-                }}
-              >
-                {active && (
-                  <span aria-hidden="true" className="absolute inset-x-0 top-0 h-px bg-(--ui-stroke-primary)" />
-                )}
-                <Tip label={tab.label}>
-                  <button
-                    aria-selected={active}
-                    className="flex h-full min-w-0 max-w-full items-center overflow-hidden pl-3 pr-2 text-left outline-none"
-                    onClick={() => selectRightRailTab(tab.id)}
-                    role="tab"
-                    type="button"
+                      event.preventDefault()
+                      closeRightRailTab(tab.id)
+                    }}
+                    onMouseDown={event => {
+                      if (event.button === 1) {
+                        event.preventDefault()
+                      }
+                    }}
                   >
-                    <span className="block min-w-0 truncate">{tab.label}</span>
-                  </button>
-                </Tip>
-                <span
-                  aria-hidden="true"
-                  className="pointer-events-none absolute inset-y-0 right-0 w-9 bg-[linear-gradient(to_right,transparent,var(--tab-bg)_55%)] opacity-0 transition-opacity group-hover/tab:opacity-100 group-focus-within/tab:opacity-100"
-                />
-                <button
-                  aria-label={t.preview.closeTab(tab.label)}
-                  className="pointer-events-none absolute right-1.5 top-1/2 grid size-4 -translate-y-1/2 place-items-center rounded-sm text-(--ui-text-tertiary) opacity-0 transition-[background-color,color,opacity] hover:bg-(--ui-bg-secondary) hover:text-foreground focus-visible:pointer-events-auto focus-visible:opacity-100 group-hover/tab:pointer-events-auto group-hover/tab:opacity-100 group-focus-within/tab:pointer-events-auto group-focus-within/tab:opacity-100"
-                  onClick={() => closeRightRailTab(tab.id)}
-                  type="button"
-                >
-                  <Codicon name="close" size="0.75rem" />
-                </button>
-              </div>
+                    {active && (
+                      <span aria-hidden="true" className="absolute inset-x-0 top-0 h-px bg-(--ui-stroke-primary)" />
+                    )}
+                    <Tip label={tab.target.path || tab.target.url || tab.label}>
+                      <button
+                        aria-selected={active}
+                        className="flex h-full min-w-0 max-w-full items-center overflow-hidden pl-3 pr-2 text-left outline-none"
+                        onClick={() => selectRightRailTab(tab.id)}
+                        role="tab"
+                        type="button"
+                      >
+                        <span className="block min-w-0 truncate">{tab.label}</span>
+                      </button>
+                    </Tip>
+                    <span
+                      aria-hidden="true"
+                      className="pointer-events-none absolute inset-y-0 right-0 w-9 bg-[linear-gradient(to_right,transparent,var(--tab-bg)_55%)] opacity-0 transition-opacity group-hover/tab:opacity-100 group-focus-within/tab:opacity-100"
+                    />
+                    <button
+                      aria-label={t.preview.closeTab(tab.label)}
+                      className="pointer-events-none absolute right-1.5 top-1/2 grid size-4 -translate-y-1/2 place-items-center rounded-sm text-(--ui-text-tertiary) opacity-0 transition-[background-color,color,opacity] hover:bg-(--ui-bg-secondary) hover:text-foreground focus-visible:pointer-events-auto focus-visible:opacity-100 group-hover/tab:pointer-events-auto group-hover/tab:opacity-100 group-focus-within/tab:pointer-events-auto group-focus-within/tab:opacity-100"
+                      onClick={() => closeRightRailTab(tab.id)}
+                      type="button"
+                    >
+                      <Codicon name="close" size="0.75rem" />
+                    </button>
+                  </div>
+                </ContextMenuTrigger>
+                <ContextMenuContent>
+                  <ContextMenuItem onSelect={() => closeRightRailTab(tab.id)}>
+                    {t.common.close}
+                    <span className="ml-auto pl-4 text-(--ui-text-tertiary)">{formatCombo('mod+w')}</span>
+                  </ContextMenuItem>
+                  <ContextMenuItem disabled={!hasOthers} onSelect={() => closeOtherRightRailTabs(tab.id)}>
+                    {t.preview.closeOthers}
+                  </ContextMenuItem>
+                  <ContextMenuItem disabled={!hasTabsToRight} onSelect={() => closeRightRailTabsToRight(tab.id)}>
+                    {t.preview.closeToRight}
+                  </ContextMenuItem>
+                  <ContextMenuSeparator />
+                  <ContextMenuItem onSelect={closeRightRail}>{t.preview.closeAll}</ContextMenuItem>
+                </ContextMenuContent>
+              </ContextMenu>
             )
           })}
         </div>

apps/desktop/src/app/chat/sidebar/chrome.tsx

@@ -0,0 +1,158 @@
+import type * as React from 'react'
+
+import { Codicon } from '@/components/ui/codicon'
+import { cn } from '@/lib/utils'
+
+// Shared, content-agnostic sidebar chrome — used by both the flat session
+// sections and the project/workspace tree, so it lives outside either to keep
+// imports one-directional (no index <-> projects cycle).
+
+/** `loaded/total` when there's more on the server, else just the loaded count. */
+export const countLabel = (loaded: number, total: number): string =>
+  total > loaded ? `${loaded}/${total}` : String(loaded)
+
+/** The muted count chip next to a section/workspace label. */
+export function SidebarCount({ children }: { children: React.ReactNode }) {
+  return <span className="text-[0.6875rem] font-medium text-(--ui-text-quaternary)">{children}</span>
+}
+
+// ── Row geometry (session row is canonical — everything composes these) ─────
+//
+// Height lives ONLY on SidebarRowShell (min-h-[1.625rem]). Inset children
+// stretch to fill the cell and center content internally — never items-center
+// on the shell grid, or short clusters (projects) float 1–2px off sessions.
+
+const rowMinH = 'min-h-[1.625rem]'
+const rowPadX = 'pl-2 pr-1'
+const rowGap = 'gap-1.5'
+const rowLead = 'grid size-3.5 shrink-0 place-items-center'
+const rowInset = cn(rowPadX, rowGap, 'flex h-full min-w-0 items-center self-stretch py-0.5')
+const rowLabel = 'min-w-0 truncate text-[0.8125rem] leading-none text-(--ui-text-secondary)'
+
+/** Codicon size in sidebar row leads — matches the file tree (`tree.tsx`). */
+export const SIDEBAR_LEAD_ICON_SIZE = '0.875rem' as const
+
+/** Vertical stack of rows (gap-px, single column). */
+export function SidebarRowStack({ className, ...props }: React.ComponentProps<'div'>) {
+  return <div className={cn('grid grid-cols-[minmax(0,1fr)] gap-px', className)} {...props} />
+}
+
+/** Nested rows (session previews, worktree bodies). */
+export function SidebarRowNest({ className, ...props }: React.ComponentProps<'div'>) {
+  return <SidebarRowStack className={cn('pb-1 pl-4', className)} {...props} />
+}
+
+/** Outer grid — sole owner of row height. */
+export function SidebarRowShell({
+  actions,
+  children,
+  className,
+  ...props
+}: React.ComponentProps<'div'> & { actions?: React.ReactNode }) {
+  return (
+    <div className={cn(rowMinH, 'grid grid-cols-[minmax(0,1fr)_auto] items-stretch rounded-md', className)} {...props}>
+      {children}
+      {actions ? <div className="flex shrink-0 items-center self-center">{actions}</div> : null}
+    </div>
+  )
+}
+
+/** Multi-control left cluster (project rows). */
+export function SidebarRowCluster({ className, ...props }: React.ComponentProps<'div'>) {
+  return <div className={cn(rowInset, className)} {...props} />
+}
+
+/** Session row main tap target. */
+export function SidebarRowBody({ className, ...props }: React.ComponentProps<'button'>) {
+  return <button className={cn(rowInset, 'bg-transparent text-left', className)} type="button" {...props} />
+}
+
+/** Tappable label — underline/truncate live on the inner span, not the button. */
+export function SidebarRowLink({
+  className,
+  labelClassName,
+  children,
+  ...props
+}: React.ComponentProps<'button'> & { labelClassName?: string }) {
+  return (
+    <button className={cn('min-w-0 shrink bg-transparent p-0 text-left', className)} type="button" {...props}>
+      <span className={cn(rowLabel, labelClassName)}>{children}</span>
+    </button>
+  )
+}
+
+/** Fixed leading column (dot, icon, drag handle). */
+export function SidebarRowLead({ className, ...props }: React.ComponentProps<'span'>) {
+  return <span className={cn(rowLead, className)} {...props} />
+}
+
+/** Standard row label typography. */
+export function SidebarRowLabel({ className, ...props }: React.ComponentProps<'span'>) {
+  return <span className={cn(rowLabel, className)} {...props} />
+}
+
+/** Dot ↔ grabber swap for dnd-kit reorder rows. */
+export function SidebarRowGrab({
+  ariaLabel,
+  children,
+  className,
+  dragging = false,
+  dragHandleProps,
+  leadClassName
+}: {
+  ariaLabel: string
+  children: React.ReactNode
+  className?: string
+  dragging?: boolean
+  dragHandleProps?: React.HTMLAttributes<HTMLElement>
+  leadClassName?: string
+}) {
+  return (
+    <SidebarRowLead
+      {...dragHandleProps}
+      aria-label={ariaLabel}
+      className={cn(
+        'group/handle relative cursor-grab touch-none overflow-hidden active:cursor-grabbing',
+        leadClassName,
+        className
+      )}
+      data-reorder-handle
+      onClick={event => event.stopPropagation()}
+    >
+      <span className="grid size-full place-items-center transition-opacity group-hover/handle:opacity-0 group-focus-within/handle:opacity-0">
+        {children}
+      </span>
+      <Codicon
+        className={cn(
+          'absolute text-(--ui-text-quaternary) opacity-0 transition-opacity group-hover/handle:opacity-80 group-focus-within/handle:opacity-80 hover:text-(--ui-text-secondary)',
+          dragging && 'text-(--ui-text-secondary) opacity-100'
+        )}
+        name="grabber"
+        size="0.75rem"
+      />
+    </SidebarRowLead>
+  )
+}
+
+/** Icon/dot slot inside SidebarRowLead — caps visual size so rows align. */
+export function SidebarRowLeadGlyph({
+  children,
+  className,
+  style
+}: {
+  children: React.ReactNode
+  className?: string
+  style?: React.CSSProperties
+}) {
+  return (
+    <span
+      className={cn(
+        'grid size-full place-items-center text-(--ui-text-tertiary) [&_.codicon]:leading-none',
+        className
+      )}
+      style={style}
+    >
+      {children}
+    </span>
+  )
+}

apps/desktop/src/app/chat/sidebar/cron-jobs-section.tsx

@@ -3,6 +3,7 @@ import { useEffect, useMemo, useState } from 'react'
 
 import { Codicon } from '@/components/ui/codicon'
 import { DisclosureCaret } from '@/components/ui/disclosure-caret'
+import { GlyphSpinner } from '@/components/ui/glyph-spinner'
 import { SidebarGroup, SidebarGroupContent } from '@/components/ui/sidebar'
 import { Tip } from '@/components/ui/tooltip'
 import { getCronJobRuns, type SessionInfo } from '@/hermes'
@@ -328,7 +329,7 @@ function CronJobSidebarRuns({ jobId, onOpenRun }: { jobId: string; onOpenRun: (s
     <div className="mb-1 ml-[1.375rem] flex flex-col gap-px">
       {runs === null ? (
         <div className="flex items-center gap-1.5 py-1 pl-1 text-[0.6875rem] text-(--ui-text-tertiary)">
-          <Codicon name="loading" size="0.75rem" spinning />
+          <GlyphSpinner ariaLabel={c.loading} className="text-[0.75rem]" />
         </div>
       ) : runs.length === 0 ? (
         <div className="py-1 pl-1 text-[0.6875rem] text-(--ui-text-tertiary)">{c.noRuns}</div>

apps/desktop/src/app/chat/sidebar/load-more-row.tsx

@@ -1,4 +1,5 @@
 import { Codicon } from '@/components/ui/codicon'
+import { GlyphSpinner } from '@/components/ui/glyph-spinner'
 import { useI18n } from '@/i18n'
 
 interface SidebarLoadMoreRowProps {
@@ -7,24 +8,22 @@ interface SidebarLoadMoreRowProps {
   loading?: boolean
 }
 
-// "Load N more" affordance shared by the recents, messaging, and cron sections.
-// The chevron sits in the same w-3.5 column the rows use for their dot, so it
-// lines up with the list above.
+// Compact "load more" affordance shared by recents, messaging, and cron. Kept
+// intentionally identical to workspace "show more" controls (ellipsis button)
+// so pagination reads as one interaction everywhere.
 export function SidebarLoadMoreRow({ step, onClick, loading = false }: SidebarLoadMoreRowProps) {
   const { t } = useI18n()
   const label = loading ? t.sidebar.loading : step > 0 ? t.sidebar.loadCount(step) : t.sidebar.loadMore
 
   return (
     <button
-      className="flex min-h-5 items-center gap-1.5 self-start bg-transparent pl-2 text-left text-[0.6875rem] text-(--ui-text-tertiary) transition-colors duration-100 ease-out hover:text-foreground hover:transition-none disabled:cursor-default disabled:opacity-60 disabled:hover:text-(--ui-text-tertiary)"
+      aria-label={label}
+      className="ml-auto grid size-5 place-items-center rounded-sm bg-transparent text-(--ui-text-tertiary) transition-colors hover:bg-(--ui-control-hover-background) hover:text-foreground disabled:cursor-default disabled:opacity-60 disabled:hover:bg-transparent disabled:hover:text-(--ui-text-tertiary)"
       disabled={loading}
       onClick={onClick}
       type="button"
     >
-      <span className="grid w-3.5 shrink-0 place-items-center">
-        <Codicon className="opacity-70" name={loading ? 'loading' : 'chevron-down'} size="0.75rem" spinning={loading} />
-      </span>
-      <span>{label}</span>
+      {loading ? <GlyphSpinner ariaLabel={label} className="text-[0.75rem]" /> : <Codicon name="ellipsis" size="0.75rem" />}
     </button>
   )
 }

apps/desktop/src/app/chat/sidebar/order.ts

@@ -1,3 +1,12 @@
+/** New ids first, then ids still present in the persisted order. */
+export function reconcileFreshFirst(currentIds: string[], orderIds: string[]): string[] {
+  const current = new Set(currentIds)
+  const retained = orderIds.filter(id => current.has(id))
+  const retainedSet = new Set(retained)
+
+  return [...currentIds.filter(id => !retainedSet.has(id)), ...retained]
+}
+
 export function resolveManualSessionOrderIds(currentIds: string[], orderIds: string[], manual: boolean): string[] {
   if (!manual || !currentIds.length || !orderIds.length) {
     return []
@@ -10,8 +19,5 @@ export function resolveManualSessionOrderIds(currentIds: string[], orderIds: str
     return []
   }
 
-  const retainedSet = new Set(retained)
-  const fresh = currentIds.filter(id => !retainedSet.has(id))
-
-  return [...fresh, ...retained]
+  return reconcileFreshFirst(currentIds, orderIds)
 }

apps/desktop/src/app/chat/sidebar/profile-switcher.tsx

@@ -24,6 +24,7 @@ import { useNavigate } from 'react-router-dom'
 
 import { Button } from '@/components/ui/button'
 import { Codicon } from '@/components/ui/codicon'
+import { ColorSwatches } from '@/components/ui/color-swatches'
 import { ContextMenu, ContextMenuContent, ContextMenuItem, ContextMenuTrigger } from '@/components/ui/context-menu'
 import { Popover, PopoverAnchor, PopoverContent } from '@/components/ui/popover'
 import { Tip, Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip'
@@ -494,30 +495,14 @@ function ProfileSquare({ active, color, label, onDelete, onRecolor, onRename, on
         collisionPadding={{ bottom: 44, left: 8, right: 8, top: 8 }}
         side="top"
       >
-        <div className="grid grid-cols-6 gap-1.5">
-          {PROFILE_SWATCHES.map(swatch => (
-            <button
-              aria-label={p.setColor(swatch)}
-              className="size-5 rounded-full transition-transform hover:scale-110"
-              key={swatch}
-              onClick={() => pickColor(swatch)}
-              style={{
-                backgroundColor: swatch,
-                boxShadow: swatch === color ? '0 0 0 2px var(--ui-bg-elevated), 0 0 0 3.5px currentColor' : undefined,
-                color: swatch
-              }}
-              type="button"
-            />
-          ))}
-        </div>
-        <button
-          className="mt-2 flex w-full items-center justify-center gap-1.5 rounded-md py-1 text-xs text-(--ui-text-tertiary) transition hover:bg-(--ui-control-hover-background) hover:text-foreground"
-          onClick={() => pickColor(null)}
-          type="button"
-        >
-          <Codicon name="sync" size="0.75rem" />
-          {p.autoColor}
-        </button>
+        <ColorSwatches
+          clearIcon="sync"
+          clearLabel={p.autoColor}
+          onChange={pickColor}
+          swatches={PROFILE_SWATCHES}
+          swatchLabel={p.setColor}
+          value={color}
+        />
       </PopoverContent>
     </Popover>
   )

apps/desktop/src/app/chat/sidebar/project-dialog.tsx

@@ -0,0 +1,289 @@
+import { useStore } from '@nanostores/react'
+import { useEffect, useRef, useState } from 'react'
+
+import { Button } from '@/components/ui/button'
+import { Codicon } from '@/components/ui/codicon'
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog'
+import { GenerateButton } from '@/components/ui/generate-button'
+import { Input } from '@/components/ui/input'
+import { Textarea } from '@/components/ui/textarea'
+import { useI18n } from '@/i18n'
+import { type ProjectIdeaTemplate, randomIdeaTemplates } from '@/lib/project-idea-templates'
+import { cn } from '@/lib/utils'
+import { notifyError } from '@/store/notifications'
+import {
+  $projectDialog,
+  addProjectFolder,
+  closeProjectDialog,
+  createProject,
+  generateProjectIdea,
+  pickProjectFolder,
+  renameProject
+} from '@/store/projects'
+
+// Single dialog mounted once in the sidebar; it renders create / rename /
+// add-folder flows driven by the $projectDialog atom. Folders are chosen via
+// the native directory picker (reused from the default-project-dir setting).
+export function ProjectDialog() {
+  const { t } = useI18n()
+  const p = t.sidebar.projects
+  const state = useStore($projectDialog)
+  const open = state !== null
+  const mode = state?.mode ?? 'create'
+
+  const [name, setName] = useState('')
+  const [folders, setFolders] = useState<string[]>([])
+  const [idea, setIdea] = useState('')
+  const [templates, setTemplates] = useState<ProjectIdeaTemplate[]>([])
+  const [generatingIdea, setGeneratingIdea] = useState(false)
+  const [submitting, setSubmitting] = useState(false)
+  const nameRef = useRef<HTMLInputElement>(null)
+
+  useEffect(() => {
+    if (open) {
+      setName(state?.name ?? '')
+      setFolders([])
+      setIdea('')
+      setTemplates(randomIdeaTemplates())
+      setGeneratingIdea(false)
+      setSubmitting(false)
+
+      if (mode !== 'add-folder') {
+        window.setTimeout(() => nameRef.current?.select(), 0)
+      }
+    }
+  }, [open, mode, state?.name])
+
+  const onOpenChange = (next: boolean) => {
+    if (!next) {
+      closeProjectDialog()
+    }
+  }
+
+  // One submit beat for every flow: guard re-entry, run the write, close on
+  // success, surface a toast on failure. Callers pass only the write.
+  const runSubmit = async (write: () => Promise<unknown>) => {
+    if (submitting) {
+      return
+    }
+
+    setSubmitting(true)
+
+    try {
+      await write()
+      closeProjectDialog()
+    } catch (err) {
+      notifyError(err, p.createFailed)
+    } finally {
+      setSubmitting(false)
+    }
+  }
+
+  const pickFolder = async () => {
+    const dir = await pickProjectFolder()
+
+    if (!dir) {
+      return
+    }
+
+    const projectId = state?.projectId
+
+    if (mode === 'add-folder' && projectId) {
+      await runSubmit(() => addProjectFolder(projectId, dir))
+
+      return
+    }
+
+    setFolders(prev => (prev.includes(dir) ? prev : [...prev, dir]))
+  }
+
+  const submit = async () => {
+    const trimmed = name.trim()
+    const projectId = state?.projectId
+
+    if (mode === 'rename' && projectId) {
+      if (trimmed) {
+        await runSubmit(() => renameProject(projectId, trimmed))
+      }
+
+      return
+    }
+
+    // A project owns sessions by folder (cwd-prefix), so creation requires at
+    // least one — a folder-less project couldn't hold a session anyway.
+    if (mode === 'create' && trimmed && folders.length) {
+      await runSubmit(() => createProject({ folders, idea: idea.trim() || undefined, name: trimmed, use: true }))
+    }
+  }
+
+  const generateIdea = async () => {
+    if (generatingIdea) {
+      return
+    }
+
+    setGeneratingIdea(true)
+
+    try {
+      const text = await generateProjectIdea(name)
+
+      if (text) {
+        setIdea(text)
+      }
+    } finally {
+      setGeneratingIdea(false)
+    }
+  }
+
+  const title = mode === 'rename' ? p.renameTitle : mode === 'add-folder' ? p.addFolderTitle : p.createTitle
+
+  return (
+    <Dialog onOpenChange={onOpenChange} open={open}>
+      <DialogContent className="max-w-md">
+        <DialogHeader>
+          <DialogTitle>{title}</DialogTitle>
+          {mode === 'create' && <DialogDescription>{p.createDesc}</DialogDescription>}
+        </DialogHeader>
+
+        {mode !== 'add-folder' && (
+          <Input
+            autoFocus
+            disabled={submitting}
+            onChange={event => setName(event.target.value)}
+            onKeyDown={event => {
+              if (event.key === 'Enter') {
+                event.preventDefault()
+                void submit()
+              } else if (event.key === 'Escape') {
+                onOpenChange(false)
+              }
+            }}
+            placeholder={p.namePlaceholder}
+            ref={nameRef}
+            value={name}
+          />
+        )}
+
+        {mode === 'create' && (
+          <div className="flex flex-col gap-1.5">
+            <span className="text-[0.6875rem] font-medium text-(--ui-text-tertiary)">{p.foldersLabel}</span>
+            {folders.length === 0 ? (
+              <span className="text-[0.75rem] text-(--ui-text-quaternary)">{p.noFolders}</span>
+            ) : (
+              <ul className="flex flex-col gap-1">
+                {folders.map((folder, index) => (
+                  <li
+                    className={cn(
+                      'flex items-center gap-2 rounded-md bg-(--ui-control-hover-background) px-2 py-1 text-[0.75rem]'
+                    )}
+                    key={folder}
+                  >
+                    <Codicon className="shrink-0 text-(--ui-text-tertiary)" name="folder" size="0.75rem" />
+                    <span className="min-w-0 flex-1 truncate" title={folder}>
+                      {folder}
+                    </span>
+                    {index === 0 && (
+                      <span className="shrink-0 text-[0.625rem] uppercase text-(--ui-text-quaternary)">
+                        {p.primaryBadge}
+                      </span>
+                    )}
+                    <Button
+                      aria-label={p.removeFolder}
+                      className="size-5 shrink-0 text-(--ui-text-quaternary) hover:text-foreground"
+                      onClick={() => setFolders(prev => prev.filter(f => f !== folder))}
+                      size="icon-xs"
+                      type="button"
+                      variant="ghost"
+                    >
+                      <Codicon name="close" size="0.75rem" />
+                    </Button>
+                  </li>
+                ))}
+              </ul>
+            )}
+            <Button
+              className="self-start"
+              disabled={submitting}
+              onClick={() => void pickFolder()}
+              size="sm"
+              type="button"
+              variant="ghost"
+            >
+              <Codicon name="add" size="0.75rem" />
+              {p.addFolder}
+            </Button>
+          </div>
+        )}
+
+        {mode === 'create' && (
+          <div className="flex flex-col gap-1.5">
+            <span className="text-[0.6875rem] font-medium text-(--ui-text-tertiary)">{p.ideaLabel}</span>
+            <div className="relative">
+              <Textarea
+                className="min-h-20 pr-8 text-[0.8125rem]"
+                disabled={submitting}
+                onChange={event => setIdea(event.target.value)}
+                placeholder={p.ideaPlaceholder}
+                value={idea}
+              />
+              <GenerateButton
+                className="absolute top-1 right-1"
+                disabled={submitting}
+                generating={generatingIdea}
+                generatingLabel={p.ideaGenerating}
+                label={p.ideaGenerate}
+                onGenerate={() => void generateIdea()}
+              />
+            </div>
+            <div className="flex flex-wrap items-center gap-1">
+              {templates.map(template => (
+                <button
+                  className="flex items-center gap-1 rounded-full border border-(--ui-stroke-tertiary) px-2 py-0.5 text-[0.6875rem] text-(--ui-text-secondary) transition-colors hover:border-(--ui-stroke-secondary) hover:bg-(--ui-control-hover-background) hover:text-foreground disabled:opacity-50"
+                  disabled={submitting}
+                  key={template.label}
+                  onClick={() => setIdea(template.idea)}
+                  type="button"
+                >
+                  <span aria-hidden>{template.emoji}</span>
+                  {template.label}
+                </button>
+              ))}
+              <Button
+                aria-label={p.ideaShuffle}
+                className="size-5 text-(--ui-text-quaternary) hover:text-foreground"
+                disabled={submitting}
+                onClick={() => setTemplates(randomIdeaTemplates())}
+                size="icon-xs"
+                type="button"
+                variant="ghost"
+              >
+                <Codicon name="refresh" size="0.75rem" />
+              </Button>
+            </div>
+          </div>
+        )}
+
+        {mode === 'add-folder' && (
+          <Button disabled={submitting} onClick={() => void pickFolder()} type="button">
+            <Codicon name="folder-opened" size="0.875rem" />
+            {p.addFolder}
+          </Button>
+        )}
+
+        {mode !== 'add-folder' && (
+          <DialogFooter>
+            <Button disabled={submitting} onClick={() => onOpenChange(false)} type="button" variant="ghost">
+              {t.common.cancel}
+            </Button>
+            <Button
+              disabled={submitting || !name.trim() || (mode === 'create' && folders.length === 0)}
+              onClick={() => void submit()}
+              type="button"
+            >
+              {mode === 'rename' ? t.common.save : p.create}
+            </Button>
+          </DialogFooter>
+        )}
+      </DialogContent>
+    </Dialog>
+  )
+}

apps/desktop/src/app/chat/sidebar/projects/entered-content.tsx

@@ -0,0 +1,250 @@
+import { useStore } from '@nanostores/react'
+import type * as React from 'react'
+import { useMemo, useState } from 'react'
+
+import { Button } from '@/components/ui/button'
+import { Codicon } from '@/components/ui/codicon'
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog'
+import type { HermesGitWorktree } from '@/global'
+import type { SessionInfo } from '@/hermes'
+import { useI18n } from '@/i18n'
+import { $dismissedWorktreeIds, dismissWorktree } from '@/store/layout'
+import { notifyError } from '@/store/notifications'
+import { removeWorktreePath } from '@/store/projects'
+
+import { SidebarRowStack } from '../chrome'
+
+import { useWorkspaceNodeOpen } from './model'
+import { SidebarWorkspaceGroup } from './workspace-group'
+import {
+  mergeRepoWorktreeGroups,
+  overlayRepoLanes,
+  type SidebarProjectTree,
+  type SidebarSessionGroup,
+  type SidebarWorkspaceTree
+} from './workspace-groups'
+import { WorkspaceAddButton, WorkspaceHeader } from './workspace-header'
+
+// The entered project's body. Main-checkout sessions render directly — no
+// redundant repo/branch header (the breadcrumb already names the project). Only
+// linked worktrees nest, shown by branch. Multi-folder projects keep per-repo
+// headers so the folders stay distinguishable.
+export function EnteredProjectContent({
+  project,
+  renderRows,
+  onNewSession,
+  repoWorktrees,
+  liveSessions,
+  removedSessionIds
+}: {
+  project: SidebarProjectTree
+  renderRows: (sessions: SessionInfo[]) => React.ReactNode
+  onNewSession?: (path: null | string) => void
+  repoWorktrees?: Record<string, HermesGitWorktree[]>
+  liveSessions?: SessionInfo[]
+  removedSessionIds?: ReadonlySet<string>
+}) {
+  if (!project.repos.length) {
+    return null
+  }
+
+  const single = project.repos.length === 1
+
+  return (
+    <>
+      {project.repos.map(repo => (
+        <RepoFlatSection
+          discoveredWorktrees={repo.path ? repoWorktrees?.[repo.path] : undefined}
+          key={repo.id}
+          liveSessions={liveSessions}
+          onNewSession={onNewSession}
+          removedSessionIds={removedSessionIds}
+          renderRows={renderRows}
+          repo={repo}
+          showHeader={!single}
+        />
+      ))}
+    </>
+  )
+}
+
+function RepoFlatSection({
+  repo,
+  showHeader,
+  renderRows,
+  onNewSession,
+  discoveredWorktrees,
+  liveSessions,
+  removedSessionIds
+}: {
+  repo: SidebarWorkspaceTree
+  showHeader: boolean
+  renderRows: (sessions: SessionInfo[]) => React.ReactNode
+  onNewSession?: (path: null | string) => void
+  discoveredWorktrees?: HermesGitWorktree[]
+  liveSessions?: SessionInfo[]
+  removedSessionIds?: ReadonlySet<string>
+}) {
+  const { t } = useI18n()
+  const s = t.sidebar
+  const [open, toggleOpen] = useWorkspaceNodeOpen(repo.id)
+  const dismissedWorktrees = useStore($dismissedWorktreeIds)
+
+  // The repo's session lanes already come fully built from the backend; this
+  // only injects empty VISUAL lanes from a live `git worktree list`.
+  const mergedGroups = useMemo(() => mergeRepoWorktreeGroups(repo, discoveredWorktrees), [repo, discoveredWorktrees])
+
+  // Optimistic placement runs against the MERGED lane set (backend + visual
+  // git-worktree lanes) so out-of-tree/sibling worktrees — which exist as visual
+  // lanes before the snapshot carries their sessions — get the new row. The
+  // overlay drops lanes it empties, so re-merge to restore still-real worktrees.
+  const overlaidGroups = useMemo(() => {
+    if (!(liveSessions?.length || removedSessionIds?.size)) {
+      return mergedGroups
+    }
+
+    const { groups } = overlayRepoLanes({ ...repo, groups: mergedGroups }, liveSessions ?? [], removedSessionIds)
+
+    return mergeRepoWorktreeGroups({ id: repo.id, path: repo.path, groups }, discoveredWorktrees)
+  }, [repo, mergedGroups, discoveredWorktrees, liveSessions, removedSessionIds])
+
+  // Main lanes are always visible; linked worktrees can be user-dismissed.
+  const ordered = overlaidGroups.filter(group => group.isMain || !dismissedWorktrees.includes(group.id))
+  const repoCount = ordered.reduce((sum, group) => sum + group.sessions.length, 0)
+
+  // Removal asks how: actually `git worktree remove` it, or just hide the lane
+  // and leave the worktree on disk. A dirty worktree escalates to a force prompt
+  // instead of erroring (those changes are usually throwaway).
+  const [removeTarget, setRemoveTarget] = useState<null | SidebarSessionGroup>(null)
+  const [forceTarget, setForceTarget] = useState<null | SidebarSessionGroup>(null)
+
+  const removeViaGit = async (group: SidebarSessionGroup, force = false) => {
+    if (!repo.path || !group.path) {
+      return
+    }
+
+    try {
+      await removeWorktreePath(repo.path, group.path, { force })
+      dismissWorktree(group.id)
+    } catch (err) {
+      // git refuses a non-force remove on a dirty/locked worktree — offer force
+      // rather than dead-ending on an error toast.
+      if (!force && /force|modified|untracked|dirty|locked|contains/i.test(String((err as Error)?.message ?? ''))) {
+        setForceTarget(group)
+      } else {
+        notifyError(err, s.projects.removeWorktreeFailed)
+      }
+    }
+  }
+
+  const body = (
+    <>
+      {ordered.map(group => (
+        <SidebarWorkspaceGroup
+          group={group}
+          key={group.id}
+          // The kanban bucket is read-only: it aggregates many task worktrees, so
+          // "new session here" and "remove worktree" have no single target.
+          onNewSession={group.isKanban ? undefined : onNewSession}
+          onRemove={group.isMain || group.isKanban ? undefined : () => setRemoveTarget(group)}
+          renderRows={renderRows}
+        />
+      ))}
+    </>
+  )
+
+  // Both removal prompts share the shape (hide-from-sidebar + cancel + a
+  // destructive action); only the copy and the destructive handler differ.
+  const worktreeDialog = (
+    target: null | SidebarSessionGroup,
+    setTarget: (next: null | SidebarSessionGroup) => void,
+    description: string,
+    destructiveLabel: string,
+    onDestructive: (group: SidebarSessionGroup) => void
+  ) => (
+    <Dialog onOpenChange={isOpen => !isOpen && setTarget(null)} open={Boolean(target)}>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>{`${s.projects.removeWorktree} "${target?.label ?? ''}"?`}</DialogTitle>
+          <DialogDescription>{description}</DialogDescription>
+        </DialogHeader>
+        <DialogFooter>
+          <Button onClick={() => setTarget(null)} variant="ghost">
+            {t.common.cancel}
+          </Button>
+          <Button
+            onClick={() => {
+              if (target) {
+                dismissWorktree(target.id)
+              }
+
+              setTarget(null)
+            }}
+            variant="secondary"
+          >
+            {s.projects.removeFromSidebar}
+          </Button>
+          <Button
+            onClick={() => {
+              setTarget(null)
+
+              if (target) {
+                onDestructive(target)
+              }
+            }}
+            variant="destructive"
+          >
+            {destructiveLabel}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  )
+
+  const removeDialog = (
+    <>
+      {worktreeDialog(
+        removeTarget,
+        setRemoveTarget,
+        s.projects.removeWorktreeConfirm,
+        s.projects.removeWorktree,
+        group => void removeViaGit(group)
+      )}
+      {worktreeDialog(
+        forceTarget,
+        setForceTarget,
+        s.projects.removeWorktreeDirty,
+        s.projects.forceRemove,
+        group => void removeViaGit(group, true)
+      )}
+    </>
+  )
+
+  if (!showHeader) {
+    return (
+      <>
+        {body}
+        {removeDialog}
+      </>
+    )
+  }
+
+  return (
+    <SidebarRowStack>
+      <WorkspaceHeader
+        action={
+          onNewSession && <WorkspaceAddButton label={s.newSessionIn(repo.label)} onClick={() => onNewSession(repo.path)} />
+        }
+        count={repoCount}
+        emphasis
+        icon={<Codicon className="shrink-0 text-(--ui-text-tertiary)" name="repo" size="0.75rem" />}
+        label={repo.label}
+        onToggle={toggleOpen}
+        open={open}
+        title={repo.path ?? undefined}
+      />
+      {open && <SidebarRowStack className="pl-2.5">{body}</SidebarRowStack>}
+      {removeDialog}
+    </SidebarRowStack>
+  )
+}

apps/desktop/src/app/chat/sidebar/projects/index.ts

@@ -0,0 +1,15 @@
+// Public surface of the project/worktree sidebar, consumed by the sidebar root.
+export { EnteredProjectContent } from './entered-content'
+export { PROJECT_PREVIEW_COUNT, projectTreeCwd, sortProjectsForOverview, useRepoWorktreeMap } from './model'
+export { ProjectBackRow, ProjectOverviewRow } from './overview-row'
+export { ProjectMenu } from './project-menu'
+export { SidebarWorkspaceGroup } from './workspace-group'
+export {
+  overlayLiveLanes,
+  overlayLivePreviews,
+  sessionRecency,
+  type SidebarProjectTree,
+  type SidebarSessionGroup,
+  type SidebarWorkspaceTree
+} from './workspace-groups'
+export { StartWorkButton } from './workspace-header'

apps/desktop/src/app/chat/sidebar/projects/model.ts

@@ -0,0 +1,128 @@
+import { useStore } from '@nanostores/react'
+import { useEffect, useMemo, useState } from 'react'
+
+import type { HermesGitWorktree } from '@/global'
+import type { SessionInfo } from '@/hermes'
+import { mapPool } from '@/lib/pool'
+import { $sidebarWorkspaceCollapsedIds, toggleWorkspaceNodeCollapsed } from '@/store/layout'
+import { $worktreeRefreshToken } from '@/store/projects'
+
+import { sessionRecency, type SidebarProjectTree } from './workspace-groups'
+
+// Page size when revealing more already-loaded rows within a workspace group.
+export const SIDEBAR_GROUP_PAGE = 5
+
+// Recent sessions previewed under each project in the overview.
+export const PROJECT_PREVIEW_COUNT = 3
+
+// Max concurrent `git worktree list` probes when a project spans many repos.
+const WORKTREE_PROBE_CONCURRENCY = 4
+
+const pathListKey = (paths: string[]): string =>
+  paths.map(path => path.trim()).filter(Boolean).sort((a, b) => a.localeCompare(b)).join('\n')
+
+// Every session in a project, across its repos/worktrees (order-agnostic).
+const projectSessions = (project: SidebarProjectTree): SessionInfo[] =>
+  project.repos.flatMap(repo => repo.groups.flatMap(group => group.sessions))
+
+export const projectTreeCwd = (project: SidebarProjectTree): null | string =>
+  project.path || project.repos.find(repo => repo.path)?.path || null
+
+// Overview rows carry their activity stamp from the backend (lanes are empty in
+// overview mode), falling back to loaded session times when present.
+const projectActivityTime = (project: SidebarProjectTree): number =>
+  Math.max(
+    project.lastActive ?? 0,
+    projectSessions(project).reduce((latest, s) => Math.max(latest, sessionRecency(s)), 0)
+  )
+
+// The project's most-recent sessions, for the overview preview under each row.
+export const latestProjectSessions = (project: SidebarProjectTree, limit: number): SessionInfo[] =>
+  [...projectSessions(project)].sort((a, b) => sessionRecency(b) - sessionRecency(a)).slice(0, limit)
+
+export function sortProjectsForOverview(
+  projects: SidebarProjectTree[],
+  activeProjectId: null | string
+): SidebarProjectTree[] {
+  return [...projects].sort((a, b) => {
+    const aActive = Boolean(activeProjectId && a.id === activeProjectId && !a.isAuto)
+    const bActive = Boolean(activeProjectId && b.id === activeProjectId && !b.isAuto)
+
+    if (aActive !== bActive) {
+      return aActive ? -1 : 1
+    }
+
+    if (!a.isAuto !== !b.isAuto) {
+      return a.isAuto ? 1 : -1
+    }
+
+    const aHasSessions = a.sessionCount > 0
+    const bHasSessions = b.sessionCount > 0
+
+    if (aHasSessions !== bHasSessions) {
+      return aHasSessions ? -1 : 1
+    }
+
+    return projectActivityTime(b) - projectActivityTime(a) || a.label.localeCompare(b.label, undefined, { sensitivity: 'base' })
+  })
+}
+
+// Project drill-in lanes are git-driven: source them from `git worktree list` so
+// linked worktrees still appear even when their sessions aren't in the recents
+// payload currently loaded in memory.
+export function useRepoWorktreeMap(
+  repoPaths: string[],
+  enabled: boolean
+): [Record<string, HermesGitWorktree[]>, boolean] {
+  const [map, setMap] = useState<Record<string, HermesGitWorktree[]>>({})
+  const [loading, setLoading] = useState(false)
+  const key = useMemo(() => pathListKey(repoPaths), [repoPaths])
+  // Refetch when a worktree is added/removed so a new lane shows immediately.
+  const refreshToken = useStore($worktreeRefreshToken)
+
+  useEffect(() => {
+    const git = window.hermesDesktop?.git
+
+    if (!enabled || !repoPaths.length || !git?.worktreeList) {
+      setMap({})
+      setLoading(false)
+
+      return
+    }
+
+    let cancelled = false
+
+    setLoading(true)
+    // Bounded so a many-repo project doesn't spawn a `git` process per repo at once.
+    void mapPool(repoPaths, WORKTREE_PROBE_CONCURRENCY, async repoPath => {
+      try {
+        return [repoPath, await git.worktreeList(repoPath)] as const
+      } catch {
+        return [repoPath, []] as const
+      }
+    })
+      .then(entries => void (cancelled || setMap(Object.fromEntries(entries))))
+      .finally(() => void (cancelled || setLoading(false)))
+
+    return () => {
+      cancelled = true
+    }
+  }, [enabled, key, repoPaths, refreshToken])
+
+  return [map, loading]
+}
+
+// Persisted open/collapse for a repo/worktree node. Lets a project's folder
+// layout auto-restore when you enter it, and survive reloads.
+//
+// The persisted set is an OVERRIDE of `defaultOpen`, not an absolute "collapsed"
+// list: XOR lets one store serve both polarities. A default-open node (repo,
+// populated lane) lists collapses; a default-collapsed node (an EMPTY lane — no
+// sessions yet) instead records an explicit expand. So empty worktree/branch
+// lanes start collapsed and only open when the user clicks in.
+export function useWorkspaceNodeOpen(id: string, defaultOpen = true): [boolean, () => void] {
+  const collapsed = useStore($sidebarWorkspaceCollapsedIds)
+  const overridden = collapsed.includes(id)
+
+  return [defaultOpen ? !overridden : overridden, () => toggleWorkspaceNodeCollapsed(id)]
+}

apps/desktop/src/app/chat/sidebar/projects/overview-row.tsx

@@ -0,0 +1,155 @@
+import type * as React from 'react'
+import { useRef } from 'react'
+
+import { Codicon } from '@/components/ui/codicon'
+import { DisclosureCaret } from '@/components/ui/disclosure-caret'
+import type { SessionInfo } from '@/hermes'
+import { useI18n } from '@/i18n'
+import { cn } from '@/lib/utils'
+
+import {
+  SIDEBAR_LEAD_ICON_SIZE,
+  SidebarRowBody,
+  SidebarRowCluster,
+  SidebarRowGrab,
+  SidebarRowLabel,
+  SidebarRowLead,
+  SidebarRowLeadGlyph,
+  SidebarRowLink,
+  SidebarRowNest,
+  SidebarRowShell
+} from '../chrome'
+
+import { latestProjectSessions, PROJECT_PREVIEW_COUNT, useWorkspaceNodeOpen } from './model'
+import { ProjectMenu } from './project-menu'
+import type { SidebarProjectTree } from './workspace-groups'
+import { WorkspaceAddButton } from './workspace-header'
+
+// A bare color dot (no icon) or an icon glyph — tinted by `color` when set, else
+// the lead's default tertiary. The glyph wrapper centers + caps size either way.
+export function projectIcon({ color, icon }: SidebarProjectTree) {
+  if (color && !icon) {
+    return (
+      <SidebarRowLeadGlyph>
+        <span aria-hidden="true" className="size-1 rounded-full" style={{ backgroundColor: color }} />
+      </SidebarRowLeadGlyph>
+    )
+  }
+
+  return (
+    <SidebarRowLeadGlyph style={color ? { color } : undefined}>
+      <Codicon name={icon || 'folder-library'} size={SIDEBAR_LEAD_ICON_SIZE} />
+    </SidebarRowLeadGlyph>
+  )
+}
+
+export function ProjectBackRow({ label, onClick }: { label: string; onClick: () => void }) {
+  return (
+    <SidebarRowShell>
+      <SidebarRowBody
+        className="group/back w-full text-(--ui-text-tertiary) opacity-40 hover:text-foreground"
+        onClick={onClick}
+      >
+        <SidebarRowLead>
+          <SidebarRowLeadGlyph>
+            <Codicon name="arrow-left" size={SIDEBAR_LEAD_ICON_SIZE} />
+          </SidebarRowLeadGlyph>
+        </SidebarRowLead>
+        <SidebarRowLabel className="text-xs underline-offset-4 group-hover/back:underline">{label}</SidebarRowLabel>
+      </SidebarRowBody>
+    </SidebarRowShell>
+  )
+}
+
+interface ProjectOverviewRowProps {
+  project: SidebarProjectTree
+  onEnter?: (id: string) => void
+  onNewSession?: (path: null | string) => void
+  renderRows?: (sessions: SessionInfo[]) => React.ReactNode
+  activeProjectId?: null | string
+  previewSessions?: SessionInfo[]
+  reorderable?: boolean
+  dragging?: boolean
+  dragHandleProps?: React.HTMLAttributes<HTMLElement>
+  ref?: React.Ref<HTMLDivElement>
+  style?: React.CSSProperties
+}
+
+export function ProjectOverviewRow({
+  project,
+  onEnter,
+  onNewSession,
+  renderRows,
+  activeProjectId,
+  previewSessions,
+  reorderable = false,
+  dragging = false,
+  dragHandleProps,
+  ref,
+  style
+}: ProjectOverviewRowProps) {
+  const { t } = useI18n()
+  const s = t.sidebar
+  const isActive = project.id === activeProjectId
+  const [open, toggleOpen] = useWorkspaceNodeOpen(project.id)
+  // The appearance popover anchors here (the full row) so it opens flush with
+  // the sidebar's content edge regardless of which side the sidebar is on.
+  const rowRef = useRef<HTMLDivElement>(null)
+  const fetched = (previewSessions ?? []).slice(0, PROJECT_PREVIEW_COUNT)
+  const preview = renderRows ? (fetched.length ? fetched : latestProjectSessions(project, PROJECT_PREVIEW_COUNT)) : []
+
+  const lead = reorderable ? (
+    <SidebarRowGrab
+      ariaLabel={s.projects.reorder(project.label)}
+      dragging={dragging}
+      dragHandleProps={dragHandleProps}
+      leadClassName="overflow-visible"
+    >
+      {projectIcon(project)}
+    </SidebarRowGrab>
+  ) : (
+    <SidebarRowLead>{projectIcon(project)}</SidebarRowLead>
+  )
+
+  return (
+    <div className={cn(dragging && 'relative z-10')} ref={ref} style={style}>
+      <SidebarRowShell
+        actions={
+          <>
+            {onNewSession && <WorkspaceAddButton label={s.newSessionIn(project.label)} onClick={() => onNewSession(project.path)} />}
+            <ProjectMenu anchorRef={rowRef} isActive={isActive} project={project} />
+          </>
+        }
+        className={cn('group/workspace', dragging && 'cursor-grabbing bg-(--ui-sidebar-surface-background)')}
+        ref={rowRef}
+      >
+        <SidebarRowCluster className="min-w-0 flex-1">
+          {lead}
+          <SidebarRowLink
+            aria-label={s.projects.enter(project.label)}
+            labelClassName={cn('hover:text-foreground hover:underline', isActive && 'text-foreground')}
+            onClick={() => onEnter?.(project.id)}
+          >
+            {project.label}
+          </SidebarRowLink>
+          {preview.length > 0 ? (
+            <button
+              aria-label={s.projects.toggle(project.label)}
+              className="flex flex-1 items-center self-stretch bg-transparent p-0"
+              onClick={toggleOpen}
+              type="button"
+            >
+              <DisclosureCaret
+                className="shrink-0 text-(--ui-text-tertiary) opacity-0 transition group-hover/workspace:opacity-100"
+                open={open}
+              />
+            </button>
+          ) : (
+            <span className="flex-1" />
+          )}
+        </SidebarRowCluster>
+      </SidebarRowShell>
+      {open && preview.length > 0 && <SidebarRowNest>{renderRows?.(preview)}</SidebarRowNest>}
+    </div>
+  )
+}

apps/desktop/src/app/chat/sidebar/projects/project-menu.tsx

@@ -0,0 +1,206 @@
+import { useStore } from '@nanostores/react'
+import type * as React from 'react'
+import { useState } from 'react'
+
+import { Codicon } from '@/components/ui/codicon'
+import { ColorSwatches } from '@/components/ui/color-swatches'
+import { ConfirmDialog } from '@/components/ui/confirm-dialog'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger
+} from '@/components/ui/dropdown-menu'
+import { Popover, PopoverAnchor, PopoverContent } from '@/components/ui/popover'
+import { useI18n } from '@/i18n'
+import { PROFILE_SWATCHES } from '@/lib/profile-color'
+import { cn } from '@/lib/utils'
+import { $panesFlipped, dismissAutoProject } from '@/store/layout'
+import {
+  copyPath,
+  deleteProject,
+  openProjectAddFolder,
+  openProjectRename,
+  revealPath,
+  setActiveProject,
+  updateProject
+} from '@/store/projects'
+
+import type { SidebarProjectTree } from './workspace-groups'
+
+// Curated codicons for the project glyph (tinted by the chosen color).
+const ICONS = [
+  'folder-library', 'repo', 'rocket', 'beaker', 'flame', 'star-full', 'heart',
+  'zap', 'target', 'lightbulb', 'tools', 'device-desktop', 'device-mobile', 'terminal',
+  'dashboard', 'globe', 'broadcast', 'cloud', 'database', 'package', 'book',
+  'organization', 'bug', 'shield', 'key', 'gift', 'telescope', 'home'
+]
+
+// Per-project actions, modeled on git GUIs (GitHub Desktop / GitKraken): reveal
+// in the file manager, copy path, and "Remove from sidebar" (never deletes files
+// — auto projects are dismissed, explicit ones drop their entry). Explicit
+// projects additionally get rename / add folder / set active. Hidden until the
+// row is hovered (group/workspace), matching the + affordance.
+export function ProjectMenu({
+  project,
+  isActive,
+  scoped = false,
+  onExitScope,
+  anchorRef
+}: {
+  project: SidebarProjectTree
+  isActive: boolean
+  // True when rendered in the entered-project header, so removal can leave the
+  // now-defunct scope.
+  scoped?: boolean
+  onExitScope?: () => void
+  // Anchor the appearance popover to the whole row instead of the kebab, so it
+  // opens flush against the sidebar's content-facing edge — otherwise a
+  // right-side sidebar drags the picker across the entire panel (the kebab
+  // lives at the row's outer edge). Falls back to the kebab when absent.
+  anchorRef?: React.RefObject<HTMLElement | null>
+}) {
+  const { t } = useI18n()
+  const p = t.sidebar.projects
+  const target = { id: project.id, name: project.label }
+  const [confirmDeleteOpen, setConfirmDeleteOpen] = useState(false)
+  const [appearanceOpen, setAppearanceOpen] = useState(false)
+  // Open toward the content area: right when the sidebar is on the left, left
+  // when the panes are flipped (sidebar on the right).
+  const panesFlipped = useStore($panesFlipped)
+
+  const removeAuto = () => {
+    dismissAutoProject(project.id)
+
+    if (scoped) {
+      onExitScope?.()
+    }
+  }
+
+  const confirmDelete = async () => {
+    await deleteProject(project.id)
+
+    if (scoped) {
+      onExitScope?.()
+    }
+  }
+
+  const trigger = (
+    <DropdownMenuTrigger asChild>
+      <button
+        aria-label={p.menu}
+        className={cn(
+          'grid size-4 shrink-0 place-items-center rounded-sm bg-transparent text-(--ui-text-quaternary) opacity-0 transition-opacity hover:bg-(--ui-control-hover-background) hover:text-foreground data-[state=open]:opacity-100',
+          // In the project header reveal on the whole header hover; in overview
+          // rows reveal on the row hover.
+          scoped ? 'group-hover/section:opacity-100' : 'group-hover/workspace:opacity-100'
+        )}
+        onClick={event => event.stopPropagation()}
+        type="button"
+      >
+        <Codicon name="kebab-vertical" size="0.75rem" />
+      </button>
+    </DropdownMenuTrigger>
+  )
+
+  return (
+    <Popover onOpenChange={setAppearanceOpen} open={appearanceOpen}>
+      {/* Position the appearance popover against the row (when a ref is wired);
+          the kebab is only the dropdown trigger then. */}
+      {anchorRef ? <PopoverAnchor virtualRef={anchorRef as React.RefObject<HTMLElement>} /> : null}
+      <DropdownMenu>
+        {anchorRef ? trigger : <PopoverAnchor asChild>{trigger}</PopoverAnchor>}
+        {/* Closing the menu refocuses the trigger (also the popover anchor),
+            which the appearance popover would read as focus-outside and die on.
+            Suppress that refocus so it survives. */}
+        <DropdownMenuContent align="end" className="w-48" onCloseAutoFocus={event => event.preventDefault()} sideOffset={6}>
+          {!project.isAuto && (
+            <>
+              <DropdownMenuItem onSelect={() => openProjectRename(target)}>
+                <Codicon name="edit" size="0.875rem" />
+                <span>{p.menuRename}</span>
+              </DropdownMenuItem>
+              <DropdownMenuItem onSelect={() => setAppearanceOpen(true)}>
+                <Codicon name="symbol-color" size="0.875rem" />
+                <span>{p.menuAppearance}</span>
+              </DropdownMenuItem>
+              <DropdownMenuItem onSelect={() => openProjectAddFolder(target)}>
+                <Codicon name="new-folder" size="0.875rem" />
+                <span>{p.menuAddFolder}</span>
+              </DropdownMenuItem>
+              <DropdownMenuItem disabled={isActive} onSelect={() => void setActiveProject(project.id)}>
+                <Codicon name="target" size="0.875rem" />
+                <span>{p.menuSetActive}</span>
+              </DropdownMenuItem>
+              <DropdownMenuSeparator />
+            </>
+          )}
+          <DropdownMenuItem disabled={!project.path} onSelect={() => void revealPath(project.path)}>
+            <Codicon name="folder-opened" size="0.875rem" />
+            <span>{p.reveal}</span>
+          </DropdownMenuItem>
+          <DropdownMenuItem disabled={!project.path} onSelect={() => void copyPath(project.path)}>
+            <Codicon name="copy" size="0.875rem" />
+            <span>{p.copyPath}</span>
+          </DropdownMenuItem>
+          <DropdownMenuSeparator />
+          {project.isAuto ? (
+            <DropdownMenuItem onSelect={removeAuto} variant="destructive">
+              <Codicon name="trash" size="0.875rem" />
+              <span>{p.removeFromSidebar}</span>
+            </DropdownMenuItem>
+          ) : (
+            <DropdownMenuItem onSelect={() => setConfirmDeleteOpen(true)} variant="destructive">
+              <Codicon name="trash" size="0.875rem" />
+              <span>{`${p.menuDelete}…`}</span>
+            </DropdownMenuItem>
+          )}
+        </DropdownMenuContent>
+      </DropdownMenu>
+      <PopoverContent
+        align="start"
+        className="w-auto p-2"
+        onClick={event => event.stopPropagation()}
+        side={panesFlipped ? 'left' : 'right'}
+        sideOffset={6}
+      >
+        <ColorSwatches
+          clearIcon="circle-slash"
+          clearLabel={p.noColor}
+          onChange={color => void updateProject(project.id, { color })}
+          swatches={PROFILE_SWATCHES}
+          value={project.color ?? null}
+        />
+        {/* Same 6 columns + gap as the swatch grid so the popover keeps the
+            profile picker's width (icons flex to fill, not fixed-width). */}
+        <div className="mt-2 grid grid-cols-6 gap-1.5">
+          {ICONS.map(name => (
+            <button
+              aria-label={name}
+              className={cn(
+                'grid aspect-square place-items-center rounded-md text-(--ui-text-tertiary) transition hover:bg-(--ui-control-hover-background)',
+                project.icon === name && 'bg-(--ui-control-active-background) text-foreground'
+              )}
+              key={name}
+              onClick={() => void updateProject(project.id, { icon: project.icon === name ? null : name })}
+              style={project.icon === name && project.color ? { color: project.color } : undefined}
+              type="button"
+            >
+              <Codicon name={name} size="0.8125rem" />
+            </button>
+          ))}
+        </div>
+      </PopoverContent>
+      <ConfirmDialog
+        confirmLabel={p.menuDelete}
+        description={p.deleteConfirm}
+        destructive
+        onClose={() => setConfirmDeleteOpen(false)}
+        onConfirm={confirmDelete}
+        open={confirmDeleteOpen}
+        title={`${p.menuDelete} "${project.label}"?`}
+      />
+    </Popover>
+  )
+}

apps/desktop/src/app/chat/sidebar/projects/workspace-group.tsx

@@ -0,0 +1,144 @@
+import type * as React from 'react'
+import { useState } from 'react'
+
+import { Codicon } from '@/components/ui/codicon'
+import type { SessionInfo } from '@/hermes'
+import { useI18n } from '@/i18n'
+import { notifyError } from '@/store/notifications'
+import { newSessionInProfile } from '@/store/profile'
+import { switchBranchInRepo } from '@/store/projects'
+
+import { countLabel, SidebarRowStack } from '../chrome'
+import { SidebarLoadMoreRow } from '../load-more-row'
+
+import { SIDEBAR_GROUP_PAGE, useWorkspaceNodeOpen } from './model'
+import type { SidebarSessionGroup } from './workspace-groups'
+import { WorkspaceAddButton, WorkspaceHeader, WorkspaceMenu, WorkspaceShowMoreButton } from './workspace-header'
+
+interface SidebarWorkspaceGroupProps {
+  group: SidebarSessionGroup
+  renderRows: (sessions: SessionInfo[]) => React.ReactNode
+  onNewSession?: (path: null | string) => void
+  // When set (linked worktree rows), shows a remove affordance that runs a real
+  // `git worktree remove`.
+  onRemove?: () => void
+}
+
+export function SidebarWorkspaceGroup({ group, renderRows, onNewSession, onRemove }: SidebarWorkspaceGroupProps) {
+  const { t } = useI18n()
+  const s = t.sidebar
+  const isProfileGroup = group.mode === 'profile'
+  // Empty worktree/branch lanes start collapsed — they only show a "No sessions
+  // yet" placeholder, so defaulting them open just adds noise. Profile lanes and
+  // lanes that already hold sessions default open.
+  const defaultOpen = isProfileGroup || group.sessions.length > 0
+  const [open, toggleOpen] = useWorkspaceNodeOpen(group.id, defaultOpen)
+  const [visibleCount, setVisibleCount] = useState(SIDEBAR_GROUP_PAGE)
+
+  const loadedCount = group.sessions.length
+  // Profile groups know their on-disk total (children excluded); workspace
+  // groups only ever page within what's already loaded.
+  const totalCount = isProfileGroup ? Math.max(group.totalCount ?? loadedCount, loadedCount) : loadedCount
+  const visibleSessions = group.sessions.slice(0, visibleCount)
+  const hiddenCount = Math.max(0, totalCount - visibleSessions.length)
+  const nextCount = Math.min(SIDEBAR_GROUP_PAGE, hiddenCount)
+
+  // Leading glyph: profile color dot, a home mark for the repo's primary
+  // checkout (labeled by its live branch), or a branch/kanban mark otherwise.
+  const leadingIcon = group.color ? (
+    <span aria-hidden="true" className="size-2 shrink-0 rounded-full" style={{ backgroundColor: group.color }} />
+  ) : (
+    <Codicon
+      className="shrink-0 text-(--ui-text-tertiary)"
+      name={group.isKanban ? 'checklist' : group.isHome ? 'home' : 'git-branch'}
+      size="0.75rem"
+    />
+  )
+
+  // Reveal already-loaded rows first; only hit the backend when the next page
+  // crosses what's been fetched for this profile.
+  const handleProfileLoadMore = () => {
+    const target = visibleCount + SIDEBAR_GROUP_PAGE
+
+    setVisibleCount(target)
+
+    if (target > loadedCount && loadedCount < totalCount) {
+      group.onLoadMore?.()
+    }
+  }
+
+  const handleNewSession = async () => {
+    if (isProfileGroup) {
+      newSessionInProfile(group.id)
+
+      return
+    }
+
+    if (!onNewSession) {
+      return
+    }
+
+    // Main-checkout lanes are branch-labeled views over the same repo root path.
+    // Clicking "+" on `main` should open on `main`, not whatever branch the root
+    // currently sits on (`test0`, etc.), so explicitly switch first.
+    if (group.isMain && group.path && group.label) {
+      try {
+        await switchBranchInRepo(group.path, group.label)
+      } catch (err) {
+        notifyError(err, t.statusStack.coding.switchFailed(group.label))
+
+        return
+      }
+    }
+
+    onNewSession(group.path)
+  }
+
+  return (
+    <SidebarRowStack>
+      <WorkspaceHeader
+        action={
+          (onNewSession || isProfileGroup || onRemove) && (
+            <div className="flex items-center">
+              {(onNewSession || isProfileGroup) && (
+                <WorkspaceAddButton
+                  label={s.newSessionIn(group.label)}
+                  // Profile groups start a fresh session in that profile but keep
+                  // the all-profiles browse view; workspace groups seed the new
+                  // session's cwd. Main checkout lanes are branch-targeted.
+                  onClick={() => void handleNewSession()}
+                />
+              )}
+              {onRemove && <WorkspaceMenu onRemove={onRemove} path={group.path} />}
+            </div>
+          )
+        }
+        count={isProfileGroup ? countLabel(visibleSessions.length, totalCount) : group.sessions.length}
+        icon={leadingIcon}
+        label={group.label}
+        onToggle={toggleOpen}
+        open={open}
+        title={group.path ?? undefined}
+      />
+      {open && (
+        <>
+          {visibleSessions.length === 0 ? (
+            <div className="min-h-7 pl-2 text-[0.75rem] leading-7 text-(--ui-text-quaternary)">{s.noSessions}</div>
+          ) : (
+            renderRows(visibleSessions)
+          )}
+          {hiddenCount > 0 &&
+            (isProfileGroup ? (
+              <SidebarLoadMoreRow loading={Boolean(group.loadingMore)} onClick={handleProfileLoadMore} step={nextCount} />
+            ) : (
+              <WorkspaceShowMoreButton
+                count={nextCount}
+                label={group.label}
+                onClick={() => setVisibleCount(count => count + SIDEBAR_GROUP_PAGE)}
+              />
+            ))}
+        </>
+      )}
+    </SidebarRowStack>
+  )
+}

apps/desktop/src/app/chat/sidebar/projects/workspace-groups.test.ts

@@ -0,0 +1,616 @@
+import { describe, expect, it } from 'vitest'
+
+import type { HermesGitWorktree } from '@/global'
+import type { ProjectInfo, SessionInfo } from '@/types/hermes'
+
+import {
+  baseName,
+  kanbanWorktreeDir,
+  liveSessionProjectId,
+  mergeRepoWorktreeGroups,
+  overlayLiveLanes,
+  overlayLivePreviews,
+  type SidebarProjectTree,
+  type SidebarSessionGroup,
+  sortWorktreeGroups
+} from './workspace-groups'
+
+// The grouping itself now lives on the backend (tui_gateway/project_tree.py,
+// covered by tests/tui_gateway/test_project_tree.py). This file only covers the
+// thin render helpers the desktop still owns + the VISUAL worktree enhancer.
+
+let nextId = 0
+
+function makeSession(cwd: null | string, overrides: Partial<SessionInfo> = {}): SessionInfo {
+  return {
+    archived: false,
+    cwd,
+    ended_at: null,
+    id: `s${nextId++}`,
+    input_tokens: 0,
+    is_active: false,
+    last_active: 1_000,
+    message_count: 1,
+    model: 'claude',
+    output_tokens: 0,
+    preview: null,
+    source: 'cli',
+    started_at: 1_000,
+    title: null,
+    tool_call_count: 0,
+    ...overrides
+  }
+}
+
+const lane = (over: Partial<SidebarSessionGroup> & Pick<SidebarSessionGroup, 'id' | 'label'>): SidebarSessionGroup => ({
+  path: null,
+  sessions: [],
+  ...over
+})
+
+describe('baseName', () => {
+  it('returns the final path segment, ignoring trailing slashes and separators', () => {
+    expect(baseName('/www/hermes-agent/')).toBe('hermes-agent')
+    expect(baseName('C:\\repos\\app')).toBe('app')
+    expect(baseName('')).toBeUndefined()
+  })
+})
+
+describe('kanbanWorktreeDir', () => {
+  it('matches a kanban task worktree (t_<hex>) and returns its .worktrees dir', () => {
+    expect(kanbanWorktreeDir('/repo/.worktrees/t_aaaaaaaa')).toBe('/repo/.worktrees')
+  })
+
+  it('does NOT match a user-named "New worktree" under .worktrees/ (its own lane)', () => {
+    expect(kanbanWorktreeDir('/repo/.worktrees/test-gui-stuff')).toBeNull()
+  })
+
+  it('returns null for non-kanban paths', () => {
+    expect(kanbanWorktreeDir('/repo/src')).toBeNull()
+    expect(kanbanWorktreeDir('/repo')).toBeNull()
+  })
+})
+
+describe('sortWorktreeGroups', () => {
+  it('pins trunk to the top, sinks kanban to the bottom, and orders the rest by recency', () => {
+    const at = (t: number) => [makeSession('/x', { last_active: t })]
+
+    const groups = [
+      lane({ id: 'k', label: 'kanban', isKanban: true, sessions: at(999) }),
+      lane({ id: 'stale', label: 'stale-branch', isMain: true, sessions: at(10) }),
+      lane({ id: 'wt', label: 'busy-worktree', isMain: false, sessions: at(500) }),
+      lane({ id: 'main', label: 'main', isMain: true, sessions: at(1) })
+    ]
+
+    // main (trunk) first despite being least recent; kanban last despite being
+    // most recent; busy-worktree ahead of stale-branch by activity.
+    expect(sortWorktreeGroups(groups).map(g => g.label)).toEqual(['main', 'busy-worktree', 'stale-branch', 'kanban'])
+  })
+
+  it('pins the live home checkout above trunk, even when it has no sessions yet', () => {
+    const groups = [
+      lane({ id: 'main', label: 'main', isMain: true, sessions: [makeSession('/x', { last_active: 999 })] }),
+      lane({ id: 'home', label: 'bb/projects-paradigm', isMain: true, isHome: true })
+    ]
+
+    expect(sortWorktreeGroups(groups).map(g => g.label)).toEqual(['bb/projects-paradigm', 'main'])
+  })
+
+  it('falls back to label order for equally-idle lanes', () => {
+    const groups = [
+      lane({ id: 'b', label: 'beta', isMain: false }),
+      lane({ id: 'a', label: 'alpha', isMain: false })
+    ]
+
+    expect(sortWorktreeGroups(groups).map(g => g.label)).toEqual(['alpha', 'beta'])
+  })
+})
+
+describe('mergeRepoWorktreeGroups (visual enhancer)', () => {
+  it('injects a linked worktree lane discovered by git that has no sessions yet', () => {
+    const repo = { id: '/repo', path: '/repo', groups: [lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo' })] }
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'feature', detached: false, isMain: false, locked: false, path: '/repo-wt-feature' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+
+    expect(merged.map(g => g.label)).toEqual(['main', 'feature'])
+    // The injected lane is empty (visual only — never carries sessions).
+    expect(merged.find(g => g.label === 'feature')?.sessions).toEqual([])
+  })
+
+  it('never spawns a lane per kanban task worktree', () => {
+    const repo = { id: '/repo', path: '/repo', groups: [lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo' })] }
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'wt/t_aaaaaaaa', detached: false, isMain: false, locked: false, path: '/repo/.worktrees/t_aaaaaaaa' },
+      { branch: 'wt/t_bbbbbbbb', detached: false, isMain: false, locked: false, path: '/repo/.worktrees/t_bbbbbbbb' }
+    ]
+
+    expect(mergeRepoWorktreeGroups(repo, discovered).map(g => g.label)).toEqual(['main'])
+  })
+
+  it('does not duplicate a lane already present from the backend (by id/path)', () => {
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo')] })
+      ]
+    }
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'main', detached: false, isMain: true, locked: false, path: '/repo' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+
+    expect(merged).toHaveLength(1)
+    // The backend lane keeps its session rows; the enhancer left it untouched.
+    expect(merged[0].sessions).toHaveLength(1)
+  })
+
+  it('is a no-op when git worktree list is unavailable (remote backend)', () => {
+    const groups = [lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo' })]
+
+    expect(mergeRepoWorktreeGroups({ id: '/repo', path: '/repo', groups }, undefined).map(g => g.label)).toEqual(['main'])
+  })
+
+  it('does not add a second "main" for a linked worktree checked out on main', () => {
+    const groups = [lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo')] })]
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'main', detached: false, isMain: false, locked: false, path: '/repo/.worktrees/main-mirror' }
+    ]
+
+    expect(mergeRepoWorktreeGroups({ id: '/repo', path: '/repo', groups }, discovered).filter(g => g.label === 'main')).toHaveLength(1)
+  })
+
+  it('surfaces a user-named "New worktree" under .worktrees/ as its own lane', () => {
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'hermes/test-gui-stuff', detached: false, isMain: false, locked: false, path: '/repo/.worktrees/test-gui-stuff' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups({ id: '/repo', path: '/repo', groups: [] }, discovered)
+
+    expect(merged.map(g => g.label)).toContain('hermes/test-gui-stuff')
+  })
+
+  it('relabels a dir-named linked worktree lane to its live checked-out branch', () => {
+    // Backend labels the lane by the worktree dir (`hermes-agent-ci`); the live
+    // `git worktree list` says HEAD there is `bb/ci-affected-only` → branch wins.
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo')] }),
+        lane({
+          id: '/repo-ci',
+          label: 'hermes-agent-ci',
+          isMain: false,
+          path: '/repo-ci',
+          sessions: [makeSession('/repo-ci')]
+        })
+      ]
+    }
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'main', detached: false, isMain: true, locked: false, path: '/repo' },
+      { branch: 'bb/ci-affected-only', detached: false, isMain: false, locked: false, path: '/repo-ci' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+    const ci = merged.find(g => g.id === '/repo-ci')
+
+    expect(ci?.label).toBe('bb/ci-affected-only')
+    // The relabel is label-only — the lane keeps its id, path, and sessions.
+    expect(ci?.path).toBe('/repo-ci')
+    expect(ci?.sessions).toHaveLength(1)
+  })
+
+  it('re-anchors a lane whose path drifted from git truth back to its branch path', () => {
+    // The reported bug: a lane is correctly labeled by its branch (`bb/attempts`)
+    // but its stored PATH points at a stale/old worktree dir. git pins a branch
+    // to exactly one worktree, so the lane must follow the branch's real path —
+    // otherwise "reveal in Finder" opens a completely different worktree.
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({
+          id: '/repo/.worktrees/attempts',
+          label: 'bb/attempts',
+          isMain: false,
+          path: '/repo/.worktrees/attempts',
+          sessions: [makeSession('/repo/.worktrees/attempts')]
+        })
+      ]
+    }
+
+    // git now has `bb/attempts` at a sibling dir, not the stale `.worktrees` one.
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'bb/attempts', detached: false, isMain: false, locked: false, path: '/repo-pr-attempts' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+    const attempts = merged.filter(g => g.label === 'bb/attempts')
+
+    // Exactly one lane, re-pointed at git's real path (label preserved, sessions
+    // preserved), and NO leftover lane on the stale path.
+    expect(attempts).toHaveLength(1)
+    expect(attempts[0].path).toBe('/repo-pr-attempts')
+    expect(attempts[0].sessions).toHaveLength(1)
+    expect(merged.some(g => g.path === '/repo/.worktrees/attempts')).toBe(false)
+  })
+
+  it('collapses a re-anchored lane onto the real lane that already holds that path', () => {
+    // A stale lane (branch label, wrong path) AND the real worktree lane both
+    // exist. Re-anchoring the stale one onto git's path must not leave a twin —
+    // keep the richer (more sessions) lane.
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({ id: 'stale', label: 'bb/feature', isMain: false, path: '/repo/.worktrees/old', sessions: [] }),
+        lane({
+          id: '/repo-feature',
+          label: 'bb/feature',
+          isMain: false,
+          path: '/repo-feature',
+          sessions: [makeSession('/repo-feature'), makeSession('/repo-feature')]
+        })
+      ]
+    }
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'bb/feature', detached: false, isMain: false, locked: false, path: '/repo-feature' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+    const feature = merged.filter(g => g.path === '/repo-feature')
+
+    expect(feature).toHaveLength(1)
+    expect(feature[0].sessions).toHaveLength(2)
+    expect(merged.some(g => g.path === '/repo/.worktrees/old')).toBe(false)
+  })
+
+  it('keeps the dir label for a detached-HEAD worktree (no branch to show)', () => {
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({ id: '/repo-ci', label: 'repo-ci', isMain: false, path: '/repo-ci', sessions: [makeSession('/repo-ci')] })
+      ]
+    }
+
+    const discovered: HermesGitWorktree[] = [
+      { branch: null, detached: true, isMain: false, locked: false, path: '/repo-ci' }
+    ]
+
+    expect(mergeRepoWorktreeGroups(repo, discovered).find(g => g.id === '/repo-ci')?.label).toBe('repo-ci')
+  })
+
+  it('collapses the main checkout into one home lane labeled by the live branch (off-trunk)', () => {
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo')] })
+      ]
+    }
+
+    // The repo root is switched to a feature branch. The historical "main"
+    // sessions fold into ONE home lane labeled by the live branch — no stale
+    // "main" lane lingering beside it.
+    const discovered: HermesGitWorktree[] = [
+      { branch: 'some-feature', detached: false, isMain: true, locked: false, path: '/repo' }
+    ]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+    const home = merged.find(g => g.isHome)
+
+    expect(merged.filter(g => g.isMain)).toHaveLength(1)
+    expect(home?.label).toBe('some-feature')
+    expect(home?.path).toBe('/repo')
+    expect(home?.sessions).toHaveLength(1)
+    expect(merged.some(g => g.label === 'main')).toBe(false)
+  })
+
+  it('labels the home lane "main" (still home-flagged) when the root is on trunk', () => {
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo')] })]
+    }
+
+    const discovered: HermesGitWorktree[] = [{ branch: 'main', detached: false, isMain: true, locked: false, path: '/repo' }]
+
+    const home = mergeRepoWorktreeGroups(repo, discovered).find(g => g.isHome)
+
+    expect(home?.label).toBe('main')
+    expect(home?.isHome).toBe(true)
+  })
+
+  it('folds multiple historical main-checkout branch lanes into the single live home lane', () => {
+    const repo = {
+      id: '/repo',
+      path: '/repo',
+      groups: [
+        lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo', { id: 'a' })] }),
+        lane({ id: '/repo::branch::old', label: 'old-feature', isMain: true, path: '/repo', sessions: [makeSession('/repo', { id: 'b' })] })
+      ]
+    }
+
+    const discovered: HermesGitWorktree[] = [{ branch: 'bb/live', detached: false, isMain: true, locked: false, path: '/repo' }]
+
+    const merged = mergeRepoWorktreeGroups(repo, discovered)
+    const home = merged.find(g => g.isHome)
+
+    expect(merged.filter(g => g.isMain)).toHaveLength(1)
+    expect(home?.label).toBe('bb/live')
+    expect(home?.sessions.map(s => s.id).sort()).toEqual(['a', 'b'])
+  })
+
+  it('leaves main lanes untouched on a remote backend (no git probe)', () => {
+    const repo = { id: '/repo', path: '/repo', groups: [lane({ id: '/repo::branch::main', label: 'main', isMain: true, path: '/repo', sessions: [makeSession('/repo')] })] }
+
+    // No discovered worktrees → no live branch truth → backend label stands.
+    const merged = mergeRepoWorktreeGroups(repo, undefined)
+
+    expect(merged.map(g => g.label)).toEqual(['main'])
+    expect(merged[0].isHome).toBeFalsy()
+  })
+})
+
+const makeProject = (id: string, folders: string[]): ProjectInfo => ({
+  archived: false,
+  board_slug: null,
+  color: null,
+  created_at: 0,
+  description: null,
+  folders: folders.map((path, i) => ({ added_at: 0, is_primary: i === 0, label: null, path })),
+  icon: null,
+  id,
+  name: id,
+  primary_path: folders[0] ?? null,
+  slug: id
+})
+
+const projectNode = (over: Partial<SidebarProjectTree> & Pick<SidebarProjectTree, 'id'>): SidebarProjectTree => ({
+  label: over.id,
+  path: over.id,
+  repos: [],
+  sessionCount: 0,
+  ...over
+})
+
+describe('liveSessionProjectId', () => {
+  it('maps a brand-new (unpersisted) session to its auto project (the repo root)', () => {
+    expect(liveSessionProjectId(makeSession('/www/app'), [])).toBe('/www/app')
+  })
+
+  it('routes a session under an explicit project folder to that project', () => {
+    const id = liveSessionProjectId(makeSession('/www/app/src', { git_repo_root: '/www/app', git_branch: 'feat' }), [
+      makeProject('p_app', ['/www/app'])
+    ])
+
+    expect(id).toBe('p_app')
+  })
+
+  it('skips cwd-less, kanban, and linked-worktree sessions (backend folds those)', () => {
+    expect(liveSessionProjectId(makeSession(null), [])).toBeNull()
+    expect(liveSessionProjectId(makeSession('/repo/.worktrees/t_aaaaaaaa'), [])).toBeNull()
+    expect(liveSessionProjectId(makeSession('/elsewhere/wt', { git_repo_root: '/repo' }), [])).toBeNull()
+  })
+})
+
+describe('overlayLiveLanes', () => {
+  it('injects a live session into the matching main lane instantly', () => {
+    const project = projectNode({
+      id: '/www/app',
+      isAuto: true,
+      repos: [{ id: '/www/app', label: 'app', path: '/www/app', sessionCount: 0, groups: [] }]
+    })
+
+    const live = [makeSession('/www/app', { id: 'fresh', git_branch: 'main' })]
+
+    const overlaid = overlayLiveLanes(project, live)
+    const lane = overlaid.repos[0].groups.find(g => g.label === 'main')
+
+    expect(lane?.sessions.map(session => session.id)).toContain('fresh')
+    expect(overlaid.sessionCount).toBe(1)
+  })
+
+  it('injects a session created in a fresh worktree into that worktree lane (no git_repo_root yet)', () => {
+    // The brand-new session row has only a cwd — no git_repo_root. The entered
+    // project knows its repo root, so the worktree session still lands in its
+    // own lane (not kanban, not skipped) optimistically.
+    const project = projectNode({
+      id: '/www/app',
+      isAuto: true,
+      repos: [{ id: '/www/app', label: 'app', path: '/www/app', sessionCount: 0, groups: [] }]
+    })
+
+    const live = [makeSession('/www/app/.worktrees/baby', { id: 'fresh' })]
+
+    const overlaid = overlayLiveLanes(project, live)
+    const lane = overlaid.repos[0].groups.find(g => g.id === '/www/app/.worktrees/baby')
+
+    expect(lane?.label).toBe('baby')
+    expect(lane?.sessions.map(s => s.id)).toEqual(['fresh'])
+  })
+
+  it('folds a kanban-task worktree session into the kanban lane', () => {
+    const project = projectNode({
+      id: '/www/app',
+      isAuto: true,
+      repos: [{ id: '/www/app', label: 'app', path: '/www/app', sessionCount: 0, groups: [] }]
+    })
+
+    const live = [makeSession('/www/app/.worktrees/t_abc12345', { id: 'k' })]
+
+    const overlaid = overlayLiveLanes(project, live)
+    const lane = overlaid.repos[0].groups.find(g => g.isKanban)
+
+    expect(lane?.id).toBe('/www/app::kanban')
+    expect(lane?.sessions.map(s => s.id)).toEqual(['k'])
+  })
+
+  it('does not duplicate a session already present in a backend lane', () => {
+    const existing = makeSession('/www/app', { id: 'dup', git_branch: 'main' })
+
+    const project = projectNode({
+      id: '/www/app',
+      repos: [
+        {
+          id: '/www/app',
+          label: 'app',
+          path: '/www/app',
+          sessionCount: 1,
+          groups: [lane({ id: '/www/app::branch::main', label: 'main', isMain: true, path: '/www/app', sessions: [existing] })]
+        }
+      ]
+    })
+
+    const overlaid = overlayLiveLanes(project, [existing])
+
+    expect(overlaid.repos[0].groups.flatMap(g => g.sessions.map(s => s.id))).toEqual(['dup'])
+  })
+
+  it('adds a new session to an existing worktree lane keyed by a divergent id (matches by path)', () => {
+    // Backend keyed the worktree lane off a branch-style id (no live git probe),
+    // but the lane PATH is the worktree dir. A new session under that worktree
+    // must join the existing lane, not spawn a twin.
+    const existing = makeSession('/www/app/.worktrees/baby', { id: 'old' })
+
+    const project = projectNode({
+      id: '/www/app',
+      repos: [
+        {
+          id: '/www/app',
+          label: 'app',
+          path: '/www/app',
+          sessionCount: 1,
+          groups: [
+            lane({ id: '/www/app::branch::baby', label: 'baby', path: '/www/app/.worktrees/baby', sessions: [existing] })
+          ]
+        }
+      ]
+    })
+
+    const fresh = makeSession('/www/app/.worktrees/baby', { id: 'fresh' })
+
+    const overlaid = overlayLiveLanes(project, [existing, fresh])
+    const lanes = overlaid.repos[0].groups.filter(g => g.path === '/www/app/.worktrees/baby')
+
+    expect(lanes).toHaveLength(1)
+    expect(lanes[0].sessions.map(s => s.id).sort()).toEqual(['fresh', 'old'])
+  })
+
+  it('places a session into an out-of-tree (sibling) worktree lane by its path', () => {
+    // `hermes-agent-ci` is a linked worktree living BESIDE the repo, not under
+    // it — repo-root nesting fails, but the existing lane carries its real path.
+    const existing = makeSession('/www/app-ci', { id: 'old' })
+
+    const project = projectNode({
+      id: '/www/app',
+      repos: [
+        {
+          id: '/www/app',
+          label: 'app',
+          path: '/www/app',
+          sessionCount: 1,
+          groups: [
+            lane({ id: '/www/app::branch::main', label: 'main', isMain: true, path: '/www/app', sessions: [] }),
+            lane({ id: '/www/app-ci', label: 'app-ci', path: '/www/app-ci', sessions: [existing] })
+          ]
+        }
+      ]
+    })
+
+    const fresh = makeSession('/www/app-ci', { id: 'fresh' })
+
+    const overlaid = overlayLiveLanes(project, [existing, fresh])
+    const ci = overlaid.repos[0].groups.find(g => g.path === '/www/app-ci')
+    const main = overlaid.repos[0].groups.find(g => g.label === 'main')
+
+    expect(ci?.sessions.map(s => s.id).sort()).toEqual(['fresh', 'old'])
+    expect(main?.sessions ?? []).toHaveLength(0)
+  })
+
+  it('places into a visual-only discovered worktree lane after merge', () => {
+    const discovered = [{ path: '/www/app-retry', branch: 'bb/ci-install-retry', isMain: false, detached: false, locked: false }]
+    const groups = mergeRepoWorktreeGroups({ id: '/www/app', path: '/www/app', groups: [] }, discovered)
+
+    const project = projectNode({
+      id: '/www/app',
+      repos: [{ id: '/www/app', label: 'app', path: '/www/app', sessionCount: 0, groups }]
+    })
+
+    const fresh = makeSession('/www/app-retry', { id: 'fresh' })
+
+    const overlaid = overlayLiveLanes(project, [fresh])
+    const lane = overlaid.repos[0].groups.find(g => g.path === '/www/app-retry')
+
+    expect(lane?.sessions.map(s => s.id)).toEqual(['fresh'])
+  })
+
+  it('evicts a deleted/archived snapshot row (and drops the lane once empty)', () => {
+    const a = makeSession('/www/app', { id: 'keep', git_branch: 'main' })
+    const b = makeSession('/www/app/.worktrees/baby', { id: 'gone' })
+
+    const project = projectNode({
+      id: '/www/app',
+      repos: [
+        {
+          id: '/www/app',
+          label: 'app',
+          path: '/www/app',
+          sessionCount: 2,
+          groups: [
+            lane({ id: '/www/app::branch::main', label: 'main', isMain: true, path: '/www/app', sessions: [a] }),
+            lane({ id: '/www/app/.worktrees/baby', label: 'baby', path: '/www/app/.worktrees/baby', sessions: [b] })
+          ]
+        }
+      ]
+    })
+
+    // No live rows (both deleted from $sessions); only 'gone' is tombstoned.
+    const overlaid = overlayLiveLanes(project, [a], new Set(['gone']))
+
+    expect(overlaid.repos[0].groups.map(g => g.id)).toEqual(['/www/app::branch::main'])
+    expect(overlaid.repos[0].groups[0].sessions.map(s => s.id)).toEqual(['keep'])
+    expect(overlaid.sessionCount).toBe(1)
+  })
+})
+
+describe('overlayLivePreviews', () => {
+  it('merges live sessions into a project preview, live first, capped to the limit', () => {
+    const project = projectNode({
+      id: '/www/app',
+      previewSessions: [makeSession('/www/app', { id: 'old', started_at: 1, last_active: 1 })]
+    })
+
+    const live = [makeSession('/www/app', { id: 'fresh', started_at: 99, last_active: 99 })]
+
+    const previews = overlayLivePreviews([project], live, [], 3)
+
+    expect(previews['/www/app'].map(s => s.id)).toEqual(['fresh', 'old'])
+  })
+
+  it('evicts a deleted session from a project preview (snapshot + live)', () => {
+    const project = projectNode({
+      id: '/www/app',
+      previewSessions: [
+        makeSession('/www/app', { id: 'gone', started_at: 5, last_active: 5 }),
+        makeSession('/www/app', { id: 'old', started_at: 1, last_active: 1 })
+      ]
+    })
+
+    const previews = overlayLivePreviews([project], [], [], 3, new Set(['gone']))
+
+    expect(previews['/www/app'].map(s => s.id)).toEqual(['old'])
+  })
+})

apps/desktop/src/app/chat/sidebar/projects/workspace-groups.ts

@@ -0,0 +1,577 @@
+import type { HermesGitWorktree } from '@/global'
+import type { ProjectInfo, SessionInfo } from '@/hermes'
+
+// Session grouping is now computed authoritatively on the backend
+// (`tui_gateway/project_tree.py`, exposed via `projects.tree` /
+// `projects.project_sessions`). The desktop is a thin renderer: this module
+// only holds the render contract (the three tree interfaces) plus a couple of
+// pure helpers and the VISUAL-ONLY worktree enhancer that injects empty lanes
+// from `git worktree list`. It never decides session membership.
+
+export interface SidebarSessionGroup {
+  id: string
+  label: string
+  path: null | string
+  sessions: SessionInfo[]
+  // Profile color for the ALL-profiles view; absent for workspace groups.
+  color?: null | string
+  // True when this group is a repo's main checkout (vs a linked worktree).
+  isMain?: boolean
+  // True for the repo's primary ("home") checkout lane — the single lane that
+  // collapses all main-checkout sessions, labeled by the worktree's LIVE branch
+  // (defaulting to `main`). Renders a home glyph and pins to the top.
+  isHome?: boolean
+  // True for the synthetic lane that collapses all of a repo's kanban task
+  // worktrees (`<repo>/.worktrees/t_*`) into one row, so a heavy board doesn't
+  // spray hundreds of throwaway branch lanes across the sidebar.
+  isKanban?: boolean
+  loadingMore?: boolean
+  mode?: 'profile' | 'source' | 'workspace'
+  onLoadMore?: () => void
+  sourceId?: string
+  totalCount?: number
+}
+
+/** A repo node: holds its branch/worktree lanes (`repo -> lane -> sessions`). */
+export interface SidebarWorkspaceTree {
+  id: string
+  label: string
+  path: null | string
+  groups: SidebarSessionGroup[]
+  sessionCount: number
+}
+
+/** A project node: human-named (or repo-derived), holds its repo subtree. */
+export interface SidebarProjectTree {
+  id: string
+  label: string
+  path: null | string
+  color?: null | string
+  icon?: null | string
+  archived?: boolean
+  // A git repo root promoted automatically (not a user-created projects.db row).
+  // Deletable = dismissable.
+  isAuto?: boolean
+  // The synthetic "No project" bucket for cwd-less sessions.
+  isNoProject?: boolean
+  repos: SidebarWorkspaceTree[]
+  sessionCount: number
+  // Max activity timestamp across the project's sessions (overview sort key).
+  lastActive?: number
+  // Up to N most-recent sessions for the overview preview (set by `projects.tree`).
+  previewSessions?: SessionInfo[]
+}
+
+/** Path split into segments, ignoring trailing slashes and mixed separators. */
+const segments = (path: string): string[] =>
+  path
+    .replace(/[/\\]+$/, '')
+    .split(/[/\\]/)
+    .filter(Boolean)
+
+/** A path with trailing separators stripped, for stable equality checks. */
+const normalizePath = (path: null | string | undefined): string => (path ?? '').replace(/[/\\]+$/, '')
+
+/** Last path segment. */
+export const baseName = (path: string): string | undefined => segments(path).pop()
+
+// The `.worktrees` dir for a KANBAN-TASK worktree path, else null. Only matches
+// task worktrees (`<repo>/.worktrees/t_<hex>`, the `t_…` id kanban_db mints) so
+// the many ephemeral task worktrees collapse into one lane — while user-named
+// "New worktree" dirs (`<repo>/.worktrees/<slug>`) stay as their own lanes.
+const KANBAN_DIR_RE = /^(.*[/\\]\.worktrees)[/\\]t_[0-9a-f]+[/\\]?$/
+
+export function kanbanWorktreeDir(path: string): null | string {
+  return path.match(KANBAN_DIR_RE)?.[1] ?? null
+}
+
+/** Label for a main-checkout lane whose session recorded no branch. */
+export const DEFAULT_BRANCH_LABEL = 'main'
+
+/** The one definition of a main-checkout lane id (must match the backend tree). */
+export const branchLaneId = (repoRoot: string, branch?: string): string =>
+  `${repoRoot}::branch::${(branch ?? '').trim()}`
+
+/** A session's recency stamp (last activity, falling back to creation). */
+export const sessionRecency = (session: SessionInfo): number => session.last_active || session.started_at || 0
+
+/** Default-branch names that pin to the top and read as the repo's trunk. */
+const TRUNK_BRANCHES = new Set(['main', 'master', 'trunk', 'develop'])
+
+const isTrunkLane = (group: SidebarSessionGroup): boolean =>
+  Boolean(group.isMain) && TRUNK_BRANCHES.has(group.label.toLowerCase())
+
+/** A lane's recency = its most-recently-active session (empty lanes sink). */
+const laneActivity = (group: SidebarSessionGroup): number =>
+  group.sessions.reduce((max, session) => Math.max(max, sessionRecency(session)), 0)
+
+// Lane tiers (low sorts first): the repo's primary ("home") checkout pins above
+// everything (it's "where you are", labeled by its live branch), then trunk,
+// then ordinary branches/worktrees, then the kanban aggregate.
+const laneRank = (group: SidebarSessionGroup): number =>
+  group.isHome ? 0 : isTrunkLane(group) ? 1 : group.isKanban ? 3 : 2
+
+/**
+ * Sort by tier (home → trunk → branches/worktrees → kanban); within a tier, by
+ * most-recent activity (empty lanes fall last), label as the tiebreak.
+ */
+function compareWorktreeGroups(a: SidebarSessionGroup, b: SidebarSessionGroup): number {
+  const byRank = laneRank(a) - laneRank(b)
+
+  if (byRank !== 0) {
+    return byRank
+  }
+
+  const byActivity = laneActivity(b) - laneActivity(a)
+
+  return byActivity || a.label.localeCompare(b.label, undefined, { sensitivity: 'base' })
+}
+
+export function sortWorktreeGroups(groups: SidebarSessionGroup[]): SidebarSessionGroup[] {
+  return [...groups].sort(compareWorktreeGroups)
+}
+
+/**
+ * VISUAL enhancer only: inject empty lanes from a live `git worktree list` so a
+ * repo shows its branches/worktrees even when they have no Hermes sessions yet.
+ * The repo's real session lanes already come fully built from the backend
+ * (`projects.project_sessions`); this never adds or moves session rows, and it
+ * degrades to a no-op on remote backends (where the Electron probe returns
+ * nothing). Lanes already present (by id/path) are left untouched.
+ */
+export function mergeRepoWorktreeGroups(
+  repo: Pick<SidebarWorkspaceTree, 'groups' | 'id' | 'path'>,
+  discoveredWorktrees?: HermesGitWorktree[]
+): SidebarSessionGroup[] {
+  // Branch-primary labels: a linked worktree's identity in every git UI (VS
+  // Code, JetBrains, lazygit, …) is its CHECKED-OUT BRANCH, not the directory it
+  // happens to live in. The backend labels these lanes by dir/slug; relabel them
+  // to the live branch from `git worktree list` so the sidebar matches the
+  // composer's branch strip. Detached worktrees (no branch) keep their dir label.
+  const liveBranchByPath = new Map<string, string>()
+  // Inverse: branch → its ONE live worktree path. git guarantees a branch is
+  // checked out in at most one worktree, so this mapping is a function and can
+  // re-anchor a lane whose stored path has drifted from git truth.
+  const livePathByBranch = new Map<string, string>()
+
+  for (const worktree of discoveredWorktrees ?? []) {
+    const wtPath = normalizePath(worktree.path)
+    const branch = worktree.branch?.trim()
+
+    if (wtPath && branch && !worktree.detached) {
+      liveBranchByPath.set(wtPath, branch)
+      livePathByBranch.set(branch.toLowerCase(), worktree.path.trim())
+    }
+  }
+
+  // The primary ("home") checkout's LIVE branch. A repo dir is only ever on ONE
+  // branch, so every main-checkout session lane (historical branches over the
+  // same root path) collapses into a single home lane labeled by this live
+  // branch, defaulting to `main`. Known only when the local git probe ran;
+  // remote backends keep the backend's recorded-branch main lane untouched.
+  const mainWorktree = (discoveredWorktrees ?? []).find(w => w.isMain)
+  const homeBranch = mainWorktree && !mainWorktree.detached ? mainWorktree.branch?.trim() || DEFAULT_BRANCH_LABEL : ''
+
+  // Reconcile a LINKED worktree lane against git truth so its label AND path
+  // describe the SAME worktree. Two repair directions:
+  //  1. Path git knows → relabel to that path's live branch (git UIs identify a
+  //     worktree by its checked-out branch, not the dir it lives in).
+  //  2. Path git DOESN'T know but the label IS a live branch → the lane's path
+  //     has gone stale; re-anchor it to that branch's real path, else "reveal"
+  //     opens a different, stale checkout. The home checkout is folded
+  //     separately (below), never here.
+  const reconcile = (group: SidebarSessionGroup): SidebarSessionGroup => {
+    if (group.isMain || group.isKanban) {
+      return group
+    }
+
+    const branchForPath = liveBranchByPath.get(normalizePath(group.path))
+
+    if (branchForPath) {
+      return branchForPath !== group.label ? { ...group, label: branchForPath } : group
+    }
+
+    const livePath = livePathByBranch.get(group.label.trim().toLowerCase())
+
+    if (livePath && normalizePath(livePath) !== normalizePath(group.path)) {
+      return { ...group, id: livePath, path: livePath }
+    }
+
+    return group
+  }
+
+  const dedupeById = (sessions: SessionInfo[]): SessionInfo[] => {
+    const byId = new Map<string, SessionInfo>()
+
+    for (const session of sessions) {
+      byId.set(session.id, byId.get(session.id) ?? session)
+    }
+
+    return [...byId.values()]
+  }
+
+  // Fold every main-checkout lane into one home lane labeled by the live branch
+  // (the root dir is only ever on one branch); reconcile the linked worktrees.
+  // Always shown, even with no sessions on the current branch yet. Remote
+  // backends (no probe → no homeBranch) keep their main lanes untouched.
+  const mainGroups = repo.groups.filter(group => group.isMain)
+  const reconciled = repo.groups.filter(group => !group.isMain).map(reconcile)
+
+  if (homeBranch) {
+    reconciled.push({
+      id: branchLaneId(repo.id, homeBranch),
+      label: homeBranch,
+      path: repo.path,
+      isMain: true,
+      isHome: true,
+      sessions: dedupeById(mainGroups.flatMap(group => group.sessions))
+    })
+  } else {
+    reconciled.push(...mainGroups)
+  }
+
+  // Collapse any duplicate a re-anchor produced (a stale lane re-pointed onto a
+  // path a real lane already holds) — keep the richer (more sessions) lane.
+  const byPath = new Map<string, SidebarSessionGroup>()
+  const merged: SidebarSessionGroup[] = []
+
+  for (const group of reconciled) {
+    const key = !group.isMain && group.path ? normalizePath(group.path) : ''
+    const existing = key ? byPath.get(key) : undefined
+
+    if (existing) {
+      if (group.sessions.length > existing.sessions.length) {
+        merged[merged.indexOf(existing)] = group
+        byPath.set(key, group)
+      }
+
+      continue
+    }
+
+    if (key) {
+      byPath.set(key, group)
+    }
+
+    merged.push(group)
+  }
+
+  const seenIds = new Set(merged.map(group => group.id))
+  const seenPaths = new Set(merged.map(group => group.path).filter((path): path is string => Boolean(path)))
+  // Dedupe by branch label too: a branch shows once even if it's checked out in
+  // a linked worktree AND already has a session lane.
+  const seenLabels = new Set(merged.map(group => group.label.toLowerCase()))
+
+  for (const worktree of discoveredWorktrees ?? []) {
+    const wtPath = worktree.path?.trim()
+
+    if (!wtPath) {
+      continue
+    }
+
+    // The home checkout is already the collapsed home lane (above).
+    if (worktree.isMain && homeBranch) {
+      continue
+    }
+
+    // Kanban task worktrees never get their own lane — they fold into the
+    // session-derived `::kanban` bucket. Listing every `git worktree list` entry
+    // here is exactly what blew the sidebar up to hundreds of empty rows.
+    if (!worktree.isMain && kanbanWorktreeDir(wtPath)) {
+      continue
+    }
+
+    const label = (worktree.isMain ? worktree.branch?.trim() || DEFAULT_BRANCH_LABEL : worktree.branch?.trim()) || baseName(wtPath) || wtPath
+    const id = worktree.isMain ? branchLaneId(repo.id, label) : wtPath
+
+    const alreadySeen =
+      seenIds.has(id) || seenLabels.has(label.toLowerCase()) || (!worktree.isMain && seenPaths.has(wtPath))
+
+    if (alreadySeen) {
+      continue
+    }
+
+    merged.push({ id, isMain: worktree.isMain, label, path: wtPath, sessions: [] })
+    seenIds.add(id)
+    seenPaths.add(wtPath)
+    seenLabels.add(label.toLowerCase())
+  }
+
+  return sortWorktreeGroups(merged)
+}
+
+// ── Live session overlay ─────────────────────────────────────────────────────
+// The backend tree is a snapshot (sessions with >=1 message, refreshed on a
+// turn boundary). For parity with the flat Recents list — instant insertion of
+// a freshly-created session and the live "working" arc — we overlay the live
+// `$sessions` store onto the tree at render time. This is ADDITIVE only: the
+// backend still owns membership, structure, counts, and history. The overlay
+// just places rows already present in `$sessions` into the project/lane the
+// backend would put them in, using the same id scheme. Worktree/kanban folding
+// needs the backend common-root probe, so those rows are left for the next
+// tree refresh; the common case (a new main-checkout session) overlays here.
+
+/** True when `target` equals `folder` or is nested under it (segment-wise). */
+function isPathUnder(folder: string, target: string): boolean {
+  const f = segments(folder)
+  const t = segments(target)
+
+  if (!f.length || f.length > t.length) {
+    return false
+  }
+
+  return f.every((seg, i) => seg === t[i])
+}
+
+/**
+ * The project a plain main-checkout live session belongs to (overview
+ * membership) — explicit project by longest-prefix folder, else the repo root
+ * (the auto-project id). Returns null for sessions we can't place without the
+ * backend (cwd-less, kanban, or a linked worktree); those wait for the refresh.
+ */
+export function liveSessionProjectId(session: SessionInfo, explicitProjects: ProjectInfo[]): null | string {
+  const cwd = (session.cwd || '').trim()
+
+  if (!cwd || kanbanWorktreeDir(cwd)) {
+    return null
+  }
+
+  // No persisted repo root yet (brand-new session) → the cwd is the root.
+  const repoRoot = (session.git_repo_root || '').trim() || cwd
+  const underRepo = cwd === repoRoot || cwd.startsWith(`${repoRoot}/`) || cwd.startsWith(`${repoRoot}\\`)
+
+  if (!underRepo || cwd.startsWith(`${repoRoot}/.worktrees/`) || cwd.startsWith(`${repoRoot}\\.worktrees\\`)) {
+    return null
+  }
+
+  let projectId = ''
+  let bestLen = -1
+
+  for (const project of explicitProjects) {
+    if (project.archived) {
+      continue
+    }
+
+    for (const folder of project.folders) {
+      if (isPathUnder(folder.path, cwd) || isPathUnder(folder.path, repoRoot)) {
+        const len = segments(folder.path).length
+
+        if (len > bestLen) {
+          bestLen = len
+          projectId = project.id
+        }
+      }
+    }
+  }
+
+  return projectId || repoRoot
+}
+
+const upsertSession = (rows: SessionInfo[], session: SessionInfo): SessionInfo[] =>
+  [session, ...rows.filter(row => row.id !== session.id)].sort((a, b) => b.started_at - a.started_at)
+
+/**
+ * The lane a live session belongs to WITHIN a known repo root, by path — the
+ * entered project already knows its repo roots, so we don't need the session's
+ * (often-unset, on a fresh row) git_repo_root. Mirrors the backend's lane ids:
+ * main checkout -> branch lane, `.worktrees/t_<hex>` -> kanban, any other
+ * `.worktrees/<slug>` -> that worktree's own lane.
+ */
+function liveLaneForRepo(repoRoot: string, session: SessionInfo): null | SidebarSessionGroup {
+  const cwd = (session.cwd || '').trim()
+
+  if (!cwd || !isPathUnder(repoRoot, cwd)) {
+    return null
+  }
+
+  const wt = cwd.match(/^(.*[/\\]\.worktrees)[/\\]([^/\\]+)/)
+
+  if (wt) {
+    const [worktreeRoot, worktreesDir, slug] = [wt[0], wt[1], wt[2]]
+
+    return /^t_[0-9a-f]+$/.test(slug)
+      ? { id: `${repoRoot}::kanban`, isKanban: true, isMain: false, label: 'kanban', path: worktreesDir, sessions: [] }
+      : { id: worktreeRoot, isMain: false, label: slug, path: worktreeRoot, sessions: [] }
+  }
+
+  const branch = (session.git_branch || '').trim() || DEFAULT_BRANCH_LABEL
+
+  return { id: branchLaneId(repoRoot, branch), isMain: true, label: branch, path: repoRoot, sessions: [] }
+}
+
+const NO_REMOVED: ReadonlySet<string> = new Set()
+
+/**
+ * Reconcile ONE repo's lanes against the live `$sessions` cache: evict
+ * deleted/archived rows (`removed`) and inject freshly-created ones, so a lane
+ * mutates exactly like the flat Recents list. The backend snapshot stays the
+ * datasource for structure and off-page history; this is the optimistic layer
+ * on top (Apollo-style), reconciled away on the next snapshot refresh. Returns
+ * the same repo ref when nothing changes (memo-stable).
+ */
+export function overlayRepoLanes(
+  repo: SidebarWorkspaceTree,
+  live: SessionInfo[],
+  removed: ReadonlySet<string> = NO_REMOVED
+): SidebarWorkspaceTree {
+  const repoRoot = normalizePath(repo.path)
+  let changed = false
+
+  // Snapshot lanes minus anything the user just deleted/archived.
+  const lanes = repo.groups.map(g => {
+    if (!removed.size) {
+      return { ...g, sessions: [...g.sessions] }
+    }
+
+    const kept = g.sessions.filter(s => !removed.has(s.id))
+
+    changed ||= kept.length !== g.sessions.length
+
+    return { ...g, sessions: kept }
+  })
+
+  for (const session of live) {
+    const cwd = (session.cwd || '').trim()
+
+    if (removed.has(session.id) || !cwd) {
+      continue
+    }
+
+    // (1) Join an EXISTING worktree lane by its own path. A linked worktree can
+    // live anywhere on disk (often a repo sibling, e.g. `repo-ci`), so nesting
+    // under the repo root isn't reliable — but the lane carries its real dir.
+    // Longest match wins; skip the root lane so an in-tree `.worktrees/<slug>`
+    // session isn't swallowed by main.
+    let lane: SidebarSessionGroup | undefined
+    let bestLen = -1
+
+    for (const g of lanes) {
+      const lanePath = normalizePath(g.path)
+
+      if (!lanePath || lanePath === repoRoot || !isPathUnder(lanePath, cwd)) {
+        continue
+      }
+
+      const len = segments(lanePath).length
+
+      if (len > bestLen) {
+        bestLen = len
+        lane = g
+      }
+    }
+
+    // (2) Else place under the repo root via a computed lane (main / branch /
+    // in-tree `.worktrees` / kanban). Match by id, then path (the backend may
+    // key a worktree lane off the git-probed root OR a branch-style id), then
+    // the main-lane label; create it when the snapshot lacked it.
+    if (!lane) {
+      const placed = repo.path ? liveLaneForRepo(repo.path, session) : null
+
+      if (!placed) {
+        continue
+      }
+
+      const placedPath = normalizePath(placed.path)
+
+      lane =
+        lanes.find(g => g.id === placed.id) ??
+        (placed.isMain ? lanes.find(g => g.isMain && g.label.toLowerCase() === placed.label.toLowerCase()) : undefined) ??
+        (!placed.isMain && placedPath ? lanes.find(g => normalizePath(g.path) === placedPath) : undefined)
+
+      if (!lane) {
+        lane = { ...placed, sessions: [] }
+        lanes.push(lane)
+      }
+    }
+
+    lane.sessions = upsertSession(lane.sessions, session)
+    changed = true
+  }
+
+  if (!changed) {
+    return repo
+  }
+
+  // Drop lanes emptied by eviction (the server only emits non-empty lanes; the
+  // git-worktree enhancer re-adds any still-real worktree as an empty lane).
+  const groups = sortWorktreeGroups(lanes.filter(g => g.sessions.length > 0))
+
+  return { ...repo, groups, sessionCount: groups.reduce((n, g) => n + g.sessions.length, 0) }
+}
+
+/** Project-level overlay: {@link overlayRepoLanes} across every repo subtree. */
+export function overlayLiveLanes(
+  project: SidebarProjectTree,
+  live: SessionInfo[],
+  removed: ReadonlySet<string> = NO_REMOVED
+): SidebarProjectTree {
+  let changed = false
+
+  const repos = project.repos.map(repo => {
+    const next = overlayRepoLanes(repo, live, removed)
+
+    changed ||= next !== repo
+
+    return next
+  })
+
+  if (!changed) {
+    return project
+  }
+
+  return { ...project, repos, sessionCount: repos.reduce((n, repo) => n + repo.sessionCount, 0) }
+}
+
+/** Merge live sessions into per-project overview previews, keyed by project path. */
+export function overlayLivePreviews(
+  projects: SidebarProjectTree[],
+  live: SessionInfo[],
+  explicitProjects: ProjectInfo[],
+  limit: number,
+  removed: ReadonlySet<string> = new Set()
+): Record<string, SessionInfo[]> {
+  const byProject = new Map<string, SessionInfo[]>()
+
+  for (const session of live) {
+    if (removed.has(session.id)) {
+      continue
+    }
+
+    const projectId = liveSessionProjectId(session, explicitProjects)
+
+    if (!projectId) {
+      continue
+    }
+
+    const arr = byProject.get(projectId) ?? []
+    arr.push(session)
+    byProject.set(projectId, arr)
+  }
+
+  const out: Record<string, SessionInfo[]> = {}
+
+  for (const node of projects) {
+    if (!node.path) {
+      continue
+    }
+
+    const liveRows = byProject.get(node.id) ?? []
+    const base = (node.previewSessions ?? []).filter(session => !removed.has(session.id))
+
+    if (!liveRows.length && !base.length) {
+      continue
+    }
+
+    // Live rows take precedence (fresher title/activity/working state).
+    const map = new Map<string, SessionInfo>()
+
+    for (const session of [...liveRows, ...base]) {
+      if (!map.has(session.id)) {
+        map.set(session.id, session)
+      }
+    }
+
+    out[node.path] = [...map.values()].sort((a, b) => sessionRecency(b) - sessionRecency(a)).slice(0, limit)
+  }
+
+  return out
+}

apps/desktop/src/app/chat/sidebar/projects/workspace-header.tsx

@@ -0,0 +1,243 @@
+import type * as React from 'react'
+import { useState } from 'react'
+
+import { Button } from '@/components/ui/button'
+import { Codicon } from '@/components/ui/codicon'
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog'
+import { DisclosureCaret } from '@/components/ui/disclosure-caret'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger
+} from '@/components/ui/dropdown-menu'
+import { SanitizedInput } from '@/components/ui/sanitized-input'
+import { useI18n } from '@/i18n'
+import { gitRef } from '@/lib/sanitize'
+import { cn } from '@/lib/utils'
+import { notifyError } from '@/store/notifications'
+import { copyPath, revealPath, startWorkInRepo } from '@/store/projects'
+
+import { SidebarCount, SidebarRowLead } from '../chrome'
+
+// Branch/worktree labels routinely share a long prefix (`bb/coding-context-…`),
+// so plain end-truncation (`truncate`) hides exactly the suffix that tells two
+// lanes apart — both render as "bb/coding-context…". Keep the tail pinned and
+// ellipsize the HEAD instead, so `…context-facts-rpc` and `…context-persona`
+// stay distinguishable. Falls back to whole-string for short labels.
+function LaneLabel({ label, title }: { label: string; title?: string }) {
+  const tailLen = Math.min(14, Math.floor(label.length / 2))
+  const head = label.slice(0, label.length - tailLen)
+  const tail = label.slice(label.length - tailLen)
+
+  return (
+    <span className="flex min-w-0" title={title}>
+      <span className="truncate">{head}</span>
+      <span className="shrink-0 whitespace-pre">{tail}</span>
+    </span>
+  )
+}
+
+// "+" affordance shared by repo and worktree headers — reveals on header hover.
+export function WorkspaceAddButton({ label, onClick }: { label: string; onClick: () => void }) {
+  return (
+    <button
+      aria-label={label}
+      className="grid size-4 shrink-0 place-items-center rounded-sm bg-transparent text-(--ui-text-quaternary) opacity-0 transition-opacity hover:bg-(--ui-control-hover-background) hover:text-foreground group-hover/workspace:opacity-100"
+      onClick={onClick}
+      type="button"
+    >
+      <Codicon name="add" size="0.75rem" />
+    </button>
+  )
+}
+
+// Reveals the next page of already-loaded rows within a workspace/worktree.
+export function WorkspaceShowMoreButton({ count, label, onClick }: { count: number; label: string; onClick: () => void }) {
+  const { t } = useI18n()
+  const text = t.sidebar.showMoreIn(count, label)
+
+  return (
+    <button
+      aria-label={text}
+      className="ml-auto grid size-5 place-items-center rounded-sm bg-transparent text-(--ui-text-tertiary) transition-colors hover:bg-(--ui-control-hover-background) hover:text-foreground"
+      onClick={onClick}
+      type="button"
+    >
+      <Codicon name="ellipsis" size="0.75rem" />
+    </button>
+  )
+}
+
+// Per-worktree actions (linked worktree lanes only), mirroring the session row
+// and ProjectMenu kebab: reveal in the file manager, copy path, and remove the
+// worktree (runs a real `git worktree remove` via the caller's confirm dialog).
+export function WorkspaceMenu({ path, onRemove }: { path: null | string; onRemove: () => void }) {
+  const { t } = useI18n()
+  const p = t.sidebar.projects
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <button
+          aria-label={p.menu}
+          className="grid size-4 shrink-0 place-items-center rounded-sm bg-transparent text-(--ui-text-quaternary) opacity-0 transition-opacity hover:bg-(--ui-control-hover-background) hover:text-foreground group-hover/workspace:opacity-100 data-[state=open]:opacity-100"
+          onClick={event => event.stopPropagation()}
+          type="button"
+        >
+          <Codicon name="kebab-vertical" size="0.75rem" />
+        </button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="w-48" sideOffset={6}>
+        <DropdownMenuItem disabled={!path} onSelect={() => void revealPath(path)}>
+          <Codicon name="folder-opened" size="0.875rem" />
+          <span>{p.reveal}</span>
+        </DropdownMenuItem>
+        <DropdownMenuItem disabled={!path} onSelect={() => void copyPath(path)}>
+          <Codicon name="copy" size="0.875rem" />
+          <span>{p.copyPath}</span>
+        </DropdownMenuItem>
+        <DropdownMenuSeparator />
+        <DropdownMenuItem onSelect={onRemove} variant="destructive">
+          <Codicon name="trash" size="0.875rem" />
+          <span>{`${p.removeWorktree}…`}</span>
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  )
+}
+
+// "New worktree": prompt for a branch name, then git spins up a fresh worktree
+// for that branch under the repo (the lightest way) and we open a new session
+// inside it. Naming is explicit — no auto-generated `hermes/work-<ts>` trees.
+export function StartWorkButton({ repoPath, onStarted }: { repoPath: string; onStarted: (path: string) => void }) {
+  const { t } = useI18n()
+  const s = t.sidebar
+  const [open, setOpen] = useState(false)
+  const [name, setName] = useState('')
+  const [pending, setPending] = useState(false)
+
+  const submit = async () => {
+    const branch = name.trim()
+
+    if (pending || !repoPath || !branch) {
+      return
+    }
+
+    setPending(true)
+
+    try {
+      // Pass the typed value as both the dir slug source and the branch, so the
+      // branch is exactly what the user named (the dir is slugified git-side).
+      const result = await startWorkInRepo(repoPath, { branch, name: branch })
+
+      if (result) {
+        onStarted(result.path)
+        setOpen(false)
+        setName('')
+      }
+    } catch (err) {
+      notifyError(err, s.projects.startWorkFailed)
+    } finally {
+      setPending(false)
+    }
+  }
+
+  return (
+    <>
+      <button
+        aria-label={s.projects.startWork}
+        className="grid size-4 shrink-0 place-items-center rounded-sm bg-transparent text-(--ui-text-quaternary) opacity-0 transition-opacity hover:bg-(--ui-control-hover-background) hover:text-foreground group-hover/section:opacity-100 focus-visible:opacity-100"
+        onClick={() => setOpen(true)}
+        type="button"
+      >
+        <Codicon name="git-branch" size="0.75rem" />
+      </button>
+      <Dialog onOpenChange={setOpen} open={open}>
+        <DialogContent className="max-w-md">
+          <DialogHeader>
+            <DialogTitle>{s.projects.newWorktreeTitle}</DialogTitle>
+            <DialogDescription>{s.projects.newWorktreeDesc}</DialogDescription>
+          </DialogHeader>
+          <SanitizedInput
+            autoFocus
+            disabled={pending}
+            onKeyDown={event => {
+              if (event.key === 'Enter') {
+                event.preventDefault()
+                void submit()
+              } else if (event.key === 'Escape') {
+                setOpen(false)
+              }
+            }}
+            onValueChange={setName}
+            placeholder={s.projects.branchPlaceholder}
+            sanitize={gitRef}
+            value={name}
+          />
+          <DialogFooter>
+            <Button disabled={pending} onClick={() => setOpen(false)} type="button" variant="ghost">
+              {t.common.cancel}
+            </Button>
+            <Button disabled={pending || !name.trim()} onClick={() => void submit()} type="button">
+              {s.projects.startWork}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </>
+  )
+}
+
+// Collapsible header shared by the repo (emphasis) and worktree levels: a toggle
+// button with a leading glyph, plus an optional trailing action (the +).
+export function WorkspaceHeader({
+  action,
+  count,
+  emphasis = false,
+  icon,
+  label,
+  onToggle,
+  open,
+  title
+}: {
+  action?: React.ReactNode
+  count: React.ReactNode
+  emphasis?: boolean
+  icon: React.ReactNode
+  label: string
+  onToggle: () => void
+  open: boolean
+  /** Hover tooltip — the lane's full on-disk path (worktree / repo root). */
+  title?: string
+}) {
+  return (
+    <div
+      className={cn(
+        'group/workspace flex min-h-6 items-center gap-1 px-2 pt-1 text-[0.6875rem]',
+        emphasis ? 'font-semibold text-(--ui-text-secondary)' : 'font-medium text-(--ui-text-tertiary)'
+      )}
+    >
+      <button
+        className={cn(
+          'flex min-w-0 flex-1 items-center gap-1.5 bg-transparent text-left',
+          emphasis ? 'hover:text-foreground' : 'hover:text-(--ui-text-secondary)'
+        )}
+        onClick={onToggle}
+        type="button"
+      >
+        <SidebarRowLead>{icon}</SidebarRowLead>
+        <LaneLabel label={label} title={title ? `${label}\n${title}` : label} />
+        <span className="shrink-0">
+          <SidebarCount>{count}</SidebarCount>
+        </span>
+        <DisclosureCaret
+          className="shrink-0 text-(--ui-text-tertiary) opacity-0 transition group-hover/workspace:opacity-100"
+          open={open}
+        />
+      </button>
+      {action}
+    </div>
+  )
+}

apps/desktop/src/app/chat/sidebar/session-actions-menu.tsx

@@ -77,6 +77,7 @@ interface SessionActions {
   pinned?: boolean
   profile?: string
   onPin?: () => void
+  onBranch?: () => void
   onArchive?: () => void
   onDelete?: () => void
 }
@@ -92,7 +93,7 @@ interface ItemSpec {
   variant?: 'destructive'
 }
 
-function useSessionActions({ sessionId, title, pinned = false, profile, onPin, onArchive, onDelete }: SessionActions) {
+function useSessionActions({ sessionId, title, pinned = false, profile, onPin, onBranch, onArchive, onDelete }: SessionActions) {
   const { t } = useI18n()
   const r = t.sidebar.row
   const [renameOpen, setRenameOpen] = useState(false)
@@ -130,6 +131,15 @@ function useSessionActions({ sessionId, title, pinned = false, profile, onPin, o
         void exportSession(sessionId, { profile, title })
       }
     },
+    {
+      disabled: !onBranch,
+      icon: 'git-branch',
+      label: r.branchFrom,
+      onSelect: () => {
+        triggerHaptic('selection')
+        onBranch?.()
+      }
+    },
     {
       disabled: !sessionId,
       icon: 'edit',
@@ -175,6 +185,7 @@ function useSessionActions({ sessionId, title, pinned = false, profile, onPin, o
         appearance={Item === DropdownMenuItem ? 'menu-item' : 'context-menu-item'}
         disabled={!sessionId}
         errorMessage={r.copyIdFailed}
+        iconClassName="size-3.5 text-current"
         key={r.copyId}
         label={r.copyId}
         onCopyError={err => notifyError(err, r.copyIdFailed)}

apps/desktop/src/app/chat/sidebar/session-row.tsx

@@ -15,14 +15,18 @@ import { cn } from '@/lib/utils'
 import { $attentionSessionIds } from '@/store/session'
 import { canOpenSessionWindow, openSessionInNewWindow } from '@/store/windows'
 
+import { SidebarRowBody, SidebarRowGrab, SidebarRowLabel, SidebarRowLead, SidebarRowShell } from './chrome'
 import { SessionActionsMenu, SessionContextMenu } from './session-actions-menu'
 
 interface SidebarSessionRowProps extends React.ComponentProps<'div'> {
   session: SessionInfo
+  /** TUI-style tree stem for branched sessions (`└─ ` / `├─ `). */
+  branchStem?: string
   isPinned: boolean
   isSelected: boolean
   isWorking: boolean
   onArchive: () => void
+  onBranch?: () => void
   onDelete: () => void
   onPin: () => void
   onResume: () => void
@@ -51,10 +55,12 @@ function formatAge(seconds: number, r: Translations['sidebar']['row']): string {
 
 export function SidebarSessionRow({
   session,
+  branchStem,
   isPinned,
   isSelected,
   isWorking,
   onArchive,
+  onBranch,
   onDelete,
   onPin,
   onResume,
@@ -84,6 +90,7 @@ export function SidebarSessionRow({
   return (
     <SessionContextMenu
       onArchive={onArchive}
+      onBranch={onBranch}
       onDelete={onDelete}
       onPin={onPin}
       pinned={isPinned}
@@ -91,9 +98,38 @@ export function SidebarSessionRow({
       sessionId={session.id}
       title={title}
     >
-      <div
+      <SidebarRowShell
+        actions={
+          <div className="relative z-2 grid w-[1.375rem] place-items-center">
+            {!isWorking && (
+              <span className="pointer-events-none absolute right-6 top-1/2 min-w-6 -translate-y-1/2 text-right text-[0.625rem] leading-none text-(--ui-text-tertiary) opacity-0 transition-opacity group-hover:opacity-100">
+                {age}
+              </span>
+            )}
+            <SessionActionsMenu
+              onArchive={onArchive}
+              onBranch={onBranch}
+              onDelete={onDelete}
+              onPin={onPin}
+              pinned={isPinned}
+              profile={session.profile}
+              sessionId={session.id}
+              title={title}
+            >
+              <Button
+                aria-label={r.actionsFor(title)}
+                className="size-5 rounded-[4px] bg-transparent text-transparent transition-colors duration-100 hover:bg-(--ui-control-active-background) hover:text-foreground focus-visible:bg-(--ui-control-active-background) focus-visible:text-foreground focus-visible:ring-0 data-[state=open]:bg-(--ui-control-active-background) data-[state=open]:text-foreground group-hover:text-(--ui-text-tertiary) [&_svg]:size-3.5!"
+                size="icon"
+                title={r.sessionActions}
+                variant="ghost"
+              >
+                <Codicon name="kebab-vertical" size="0.875rem" />
+              </Button>
+            </SessionActionsMenu>
+          </div>
+        }
         className={cn(
-          'group relative grid min-h-[1.625rem] cursor-pointer grid-cols-[minmax(0,1fr)_1.375rem] items-center rounded-md transition-colors duration-100 ease-out hover:bg-(--ui-row-hover-background) hover:transition-none',
+          'group relative cursor-pointer transition-colors duration-100 ease-out hover:bg-(--ui-row-hover-background) hover:transition-none',
           isSelected && 'bg-(--ui-row-active-background)',
           isWorking && 'text-foreground',
           // Opaque surface while lifted so the dragged row erases what's under
@@ -123,9 +159,7 @@ export function SidebarSessionRow({
         {...rest}
       >
         {isWorking && !needsInput && <span aria-hidden="true" className="arc-border" />}
-        <button
-          className="z-0 flex min-w-0 items-center gap-1.5 bg-transparent py-0.5 pl-2 pr-1 text-left group-hover:pr-12"
-          onClick={event => {
+        <SidebarRowBody className={cn('z-0 group-hover:pr-12', branchStem && 'pl-3.5')} onClick={event => {
             if (event.shiftKey) {
               event.preventDefault()
               event.stopPropagation()
@@ -150,49 +184,25 @@ export function SidebarSessionRow({
 
             onResume()
           }}
-          type="button"
         >
           {reorderable ? (
-            <span
-              {...dragHandleProps}
-              aria-label={handleLabel}
-              className={cn(
-                // Scope the dot↔grabber swap to a local group so the grabber
-                // only reveals when hovering/focusing the handle itself, not
-                // anywhere on the row. Width MUST match the non-reorderable dot
-                // column (w-3.5) so rows don't shift horizontally when reorder is
-                // toggled (e.g. scoped → ALL-profiles view).
-                'group/handle relative -my-0.5 grid w-3.5 shrink-0 cursor-grab touch-none place-items-center self-stretch overflow-hidden active:cursor-grabbing',
-                // The quest-glow box-shadow extends past the dot; let it bleed
-                // out instead of being clipped by this handle's overflow-hidden.
-                needsInput && 'overflow-visible'
-              )}
-              data-reorder-handle
-              onClick={event => event.stopPropagation()}
+            <SidebarRowGrab
+              ariaLabel={handleLabel}
+              dragging={dragging}
+              dragHandleProps={dragHandleProps}
+              leadClassName={needsInput ? 'overflow-visible' : undefined}
             >
-              <SidebarRowDot
+              <SessionRowLeadDot
+                branchStem={branchStem}
                 className="transition-opacity group-hover/handle:opacity-0 group-focus-within/handle:opacity-0"
                 isWorking={isWorking}
                 needsInput={needsInput}
               />
-              <Codicon
-                className={cn(
-                  'absolute text-(--ui-text-quaternary) opacity-0 transition-opacity group-hover/handle:opacity-80 group-focus-within/handle:opacity-80 hover:text-(--ui-text-secondary)',
-                  dragging && 'text-(--ui-text-secondary) opacity-100'
-                )}
-                name="grabber"
-                size="0.75rem"
-              />
-            </span>
+            </SidebarRowGrab>
           ) : (
-            <span
-              className={cn(
-                'grid w-3.5 shrink-0 place-items-center',
-                needsInput ? 'overflow-visible' : 'overflow-hidden'
-              )}
-            >
-              <SidebarRowDot isWorking={isWorking} needsInput={needsInput} />
-            </span>
+            <SidebarRowLead className={needsInput ? 'overflow-visible' : 'overflow-hidden'}>
+              <SessionRowLeadDot branchStem={branchStem} isWorking={isWorking} needsInput={needsInput} />
+            </SidebarRowLead>
           )}
           {handoffSource && handoffLabel ? (
             <Tip label={r.handoffOrigin(handoffLabel)}>
@@ -203,41 +213,38 @@ export function SidebarSessionRow({
               />
             </Tip>
           ) : null}
-          <span className="min-w-0 flex-1 truncate text-[0.8125rem] font-normal text-(--ui-text-secondary) group-hover:text-foreground group-data-[working=true]:text-foreground/90">
+          <SidebarRowLabel className="flex-1 font-normal group-hover:text-foreground group-data-[working=true]:text-foreground/90">
             {title}
-          </span>
-        </button>
-        <div className="relative z-2 grid w-[1.375rem] place-items-center">
-          {!isWorking && (
-            <span className="pointer-events-none absolute right-6 top-1/2 min-w-6 -translate-y-1/2 text-right text-[0.625rem] leading-none text-(--ui-text-tertiary) opacity-0 transition-opacity group-hover:opacity-100">
-              {age}
-            </span>
-          )}
-          <SessionActionsMenu
-            onArchive={onArchive}
-            onDelete={onDelete}
-            onPin={onPin}
-            pinned={isPinned}
-            profile={session.profile}
-            sessionId={session.id}
-            title={title}
-          >
-            <Button
-              aria-label={r.actionsFor(title)}
-              className="size-5 rounded-[4px] bg-transparent text-transparent transition-colors duration-100 hover:bg-(--ui-control-active-background) hover:text-foreground focus-visible:bg-(--ui-control-active-background) focus-visible:text-foreground focus-visible:ring-0 data-[state=open]:bg-(--ui-control-active-background) data-[state=open]:text-foreground group-hover:text-(--ui-text-tertiary) [&_svg]:size-3.5!"
-              size="icon"
-              title={r.sessionActions}
-              variant="ghost"
-            >
-              <Codicon name="ellipsis" size="0.875rem" />
-            </Button>
-          </SessionActionsMenu>
-        </div>
-      </div>
+          </SidebarRowLabel>
+        </SidebarRowBody>
+      </SidebarRowShell>
     </SessionContextMenu>
   )
 }
 
+function SessionRowLeadDot({
+  branchStem,
+  isWorking,
+  needsInput = false,
+  className
+}: {
+  branchStem?: string
+  isWorking: boolean
+  needsInput?: boolean
+  className?: string
+}) {
+  return (
+    <span className={cn('flex items-center gap-0.5', className)}>
+      {branchStem ? (
+        <span aria-hidden className="shrink-0 font-mono text-[0.625rem] leading-none text-(--ui-text-quaternary)">
+          {branchStem}
+        </span>
+      ) : null}
+      <SidebarRowDot isWorking={isWorking} needsInput={needsInput} />
+    </span>
+  )
+}
+
 function SidebarRowDot({
   isWorking,
   needsInput = false,

apps/desktop/src/app/chat/sidebar/virtual-session-list.tsx

@@ -4,30 +4,35 @@ import { useVirtualizer } from '@tanstack/react-virtual'
 import { type FC, useCallback, useRef } from 'react'
 
 import type { SessionInfo } from '@/hermes'
+import { type SidebarSessionEntry } from '@/lib/session-branch-tree'
 import { cn } from '@/lib/utils'
 import { sessionPinId } from '@/store/session'
 
 import { SidebarSessionRow } from './session-row'
 
 interface SessionRowCommonProps {
+  branchStem?: string
   isPinned: boolean
   isSelected: boolean
   isWorking: boolean
   onArchive: () => void
+  onBranch?: () => void
   onDelete: () => void
   onPin: () => void
   onResume: () => void
+  reorderable?: boolean
 }
 
 interface VirtualSessionListProps {
   activeSessionId: null | string
   className?: string
+  entries: SidebarSessionEntry[]
   onArchiveSession: (sessionId: string) => void
+  onBranchSession?: (sessionId: string, profile?: string) => void
   onDeleteSession: (sessionId: string) => void
   onResumeSession: (sessionId: string) => void
   onTogglePin: (sessionId: string) => void
   pinned: boolean
-  sessions: SessionInfo[]
   sortable: boolean
   workingSessionIdSet: Set<string>
 }
@@ -38,21 +43,22 @@ const OVERSCAN_ROWS = 12
 export const VirtualSessionList: FC<VirtualSessionListProps> = ({
   activeSessionId,
   className,
+  entries,
   onArchiveSession,
+  onBranchSession,
   onDeleteSession,
   onResumeSession,
   onTogglePin,
   pinned,
-  sessions,
   sortable,
   workingSessionIdSet
 }) => {
   const scrollerRef = useRef<HTMLDivElement | null>(null)
 
   const virtualizer = useVirtualizer({
-    count: sessions.length,
+    count: entries.length,
     estimateSize: () => ROW_ESTIMATE_PX,
-    getItemKey: index => sessions[index]?.id ?? index,
+    getItemKey: index => entries[index]?.session.id ?? index,
     getScrollElement: () => scrollerRef.current,
     // jsdom-friendly default; the real rect takes over on first observe.
     initialRect: { height: 600, width: 240 },
@@ -65,23 +71,29 @@ export const VirtualSessionList: FC<VirtualSessionListProps> = ({
   const paddingBottom = Math.max(0, totalSize - (virtualItems[virtualItems.length - 1]?.end ?? 0))
 
   const rows = virtualItems.map(virtualItem => {
-    const session = sessions[virtualItem.index]
+    const entry = entries[virtualItem.index]
 
-    if (!session) {
+    if (!entry) {
       return null
     }
 
+    const { branchStem, session } = entry
+    const reorderable = sortable && !branchStem
+
     const commonProps: SessionRowCommonProps = {
+      branchStem,
       isPinned: pinned,
       isSelected: session.id === activeSessionId,
       isWorking: workingSessionIdSet.has(session.id),
       onArchive: () => onArchiveSession(session.id),
+      onBranch: onBranchSession ? () => onBranchSession(session.id, session.profile) : undefined,
       onDelete: () => onDeleteSession(session.id),
       onPin: () => onTogglePin(sessionPinId(session)),
-      onResume: () => onResumeSession(session.id)
+      onResume: () => onResumeSession(session.id),
+      reorderable
     }
 
-    return sortable ? (
+    return reorderable ? (
       <VirtualSortableRow
         index={virtualItem.index}
         key={session.id}

apps/desktop/src/app/chat/sidebar/workspace-groups.test.ts

@@ -1,149 +0,0 @@
-import { describe, expect, it } from 'vitest'
-
-import type { HermesWorktreeInfo } from '@/global'
-import type { SessionInfo } from '@/types/hermes'
-
-import { uniqueCwds, workspaceGroupsFor, workspaceTreeFor, type WorktreeResolver } from './workspace-groups'
-
-let nextId = 0
-
-function makeSession(cwd: null | string, overrides: Partial<SessionInfo> = {}): SessionInfo {
-  return {
-    archived: false,
-    cwd,
-    ended_at: null,
-    id: `s${nextId++}`,
-    input_tokens: 0,
-    is_active: false,
-    last_active: 1_000,
-    message_count: 1,
-    model: 'claude',
-    output_tokens: 0,
-    preview: null,
-    source: 'cli',
-    started_at: 1_000,
-    title: null,
-    tool_call_count: 0,
-    ...overrides
-  }
-}
-
-const labels = (sessions: SessionInfo[]) => workspaceGroupsFor(sessions, 'No workspace').map(g => g.label)
-
-describe('workspaceGroupsFor', () => {
-  it('groups by full cwd, not by basename — same-named folders are separate groups', () => {
-    const groups = workspaceGroupsFor(
-      [makeSession('/a/hermes-agent/apps/desktop'), makeSession('/a/hermes-agent-wt-rtl/apps/desktop')],
-      'No workspace'
-    )
-
-    expect(groups).toHaveLength(2)
-  })
-
-  it('disambiguates colliding basenames by walking up the path', () => {
-    expect(
-      labels([makeSession('/a/hermes-agent/apps/desktop'), makeSession('/a/hermes-agent-wt-rtl/apps/desktop')])
-    ).toEqual(['hermes-agent/apps/desktop', 'hermes-agent-wt-rtl/apps/desktop'])
-  })
-
-  it('leaves a unique basename as its short label', () => {
-    expect(labels([makeSession('/a/hermes-agent/apps/desktop'), makeSession('/b/heval-py')])).toEqual([
-      'desktop',
-      'heval-py'
-    ])
-  })
-
-  it('grows the prefix past one segment when the parent also collides', () => {
-    expect(labels([makeSession('/x/proj/apps/desktop'), makeSession('/y/proj/apps/desktop')])).toEqual([
-      'x/proj/apps/desktop',
-      'y/proj/apps/desktop'
-    ])
-  })
-
-  it('keeps the synthetic no-workspace group untouched even if a real group shares its label', () => {
-    const groups = workspaceGroupsFor([makeSession(null), makeSession('/a/No workspace')], 'No workspace')
-    const noWorkspace = groups.find(g => g.path === null)
-
-    expect(noWorkspace?.label).toBe('No workspace')
-  })
-})
-
-const info = (over: Partial<HermesWorktreeInfo> & Pick<HermesWorktreeInfo, 'repoRoot' | 'worktreeRoot'>): HermesWorktreeInfo => ({
-  branch: null,
-  isMainWorktree: false,
-  ...over
-})
-
-describe('workspaceTreeFor', () => {
-  it('heuristic nests `<repo>-wt-<branch>` under its sibling repo', () => {
-    const tree = workspaceTreeFor(
-      [makeSession('/www/hermes-agent'), makeSession('/www/hermes-agent-wt-rtl')],
-      'No workspace'
-    )
-
-    expect(tree).toHaveLength(1)
-    expect(tree[0].label).toBe('hermes-agent')
-    expect(tree[0].groups.map(g => g.label).sort()).toEqual(['hermes-agent', 'rtl'])
-  })
-
-  it('git metadata is authoritative — worktrees group by repoRoot regardless of directory naming', () => {
-    const resolver: WorktreeResolver = cwd => {
-      if (cwd === '/www/hermes-agent') {
-        return info({ repoRoot: '/www/hermes-agent', worktreeRoot: '/www/hermes-agent', isMainWorktree: true, branch: 'main' })
-      }
-
-      if (cwd === '/elsewhere/ha-rtl') {
-        return info({ repoRoot: '/www/hermes-agent', worktreeRoot: '/elsewhere/ha-rtl', branch: 'rtl' })
-      }
-
-      return null
-    }
-
-    const tree = workspaceTreeFor(
-      [makeSession('/www/hermes-agent'), makeSession('/elsewhere/ha-rtl')],
-      'No workspace',
-      resolver
-    )
-
-    expect(tree).toHaveLength(1)
-    expect(tree[0].label).toBe('hermes-agent')
-    // The main checkout labels by directory (its branch is transient — using it
-    // would misattribute old sessions to the currently checked-out branch);
-    // linked worktrees label by branch.
-    expect(tree[0].groups.map(g => g.label)).toEqual(['hermes-agent', 'rtl'])
-  })
-
-  it('a standalone directory is its own parent (always parent → worktree → sessions)', () => {
-    const tree = workspaceTreeFor([makeSession('/www/heval-node')], 'No workspace')
-
-    expect(tree).toHaveLength(1)
-    expect(tree[0].label).toBe('heval-node')
-    expect(tree[0].groups).toHaveLength(1)
-    expect(tree[0].groups[0].label).toBe('heval-node')
-  })
-
-  it('aggregates session counts across a repo’s worktrees', () => {
-    const tree = workspaceTreeFor(
-      [makeSession('/www/ha'), makeSession('/www/ha-wt-x'), makeSession('/www/ha-wt-x')],
-      'No workspace'
-    )
-
-    const parent = tree.find(p => p.label === 'ha')
-
-    expect(parent?.sessionCount).toBe(3)
-  })
-
-  it('no-workspace sessions form their own parent', () => {
-    const tree = workspaceTreeFor([makeSession(null)], 'No workspace')
-
-    expect(tree).toHaveLength(1)
-    expect(tree[0].label).toBe('No workspace')
-    expect(tree[0].path).toBeNull()
-  })
-})
-
-describe('uniqueCwds', () => {
-  it('dedupes and drops empty/whitespace cwds', () => {
-    expect(uniqueCwds([makeSession('/a'), makeSession('/a'), makeSession(null), makeSession('   ')])).toEqual(['/a'])
-  })
-})

apps/desktop/src/app/chat/sidebar/workspace-groups.ts

@@ -1,326 +0,0 @@
-import type { HermesWorktreeInfo } from '@/global'
-import type { SessionInfo } from '@/hermes'
-
-export interface SidebarSessionGroup {
-  id: string
-  label: string
-  path: null | string
-  sessions: SessionInfo[]
-  // Profile color for the ALL-profiles view; absent for workspace groups.
-  color?: null | string
-  loadingMore?: boolean
-  mode?: 'profile' | 'source' | 'workspace'
-  onLoadMore?: () => void
-  sourceId?: string
-  totalCount?: number
-}
-
-const NO_WORKSPACE_ID = '__no_workspace__'
-
-/** Path split into segments, ignoring trailing slashes and mixed separators. */
-const segments = (path: string): string[] => path.replace(/[/\\]+$/, '').split(/[/\\]/).filter(Boolean)
-
-/** Last path segment. */
-export const baseName = (path: string): string | undefined => segments(path).pop()
-
-/** The segments above the basename. */
-const parentSegments = (path: string): string[] => segments(path).slice(0, -1)
-
-interface Labelable {
-  id: string
-  label: string
-  path: null | string
-}
-
-/**
- * Disambiguate groups whose basename collides (worktrees all end in the same
- * `apps/desktop`, sibling repos share a folder name, etc.) by walking up the
- * path and prepending parent segments until each colliding label is unique —
- * e.g. `hermes-agent/desktop` vs `hermes-agent-wt-rtl/desktop`. Groups with a
- * unique basename keep their short label untouched.
- */
-function disambiguateLabels(groups: Labelable[]): void {
-  const byLabel = new Map<string, Labelable[]>()
-
-  for (const group of groups) {
-    const bucket = byLabel.get(group.label)
-
-    if (bucket) {
-      bucket.push(group)
-    } else {
-      byLabel.set(group.label, [group])
-    }
-  }
-
-  for (const bucket of byLabel.values()) {
-    if (bucket.length < 2) {
-      continue
-    }
-
-    // Only groups backed by a real path can grow a prefix; the synthetic
-    // "No workspace" group has no path and stays as-is.
-    const pathed = bucket.filter(group => group.path)
-
-    if (pathed.length < 2) {
-      continue
-    }
-
-    const parents = new Map(pathed.map(group => [group.id, parentSegments(group.path!)]))
-    let depth = 1
-
-    // Grow the prefix one parent segment at a time until every label in the
-    // bucket is distinct, or we run out of parent segments to add.
-    while (depth <= Math.max(...pathed.map(g => parents.get(g.id)!.length))) {
-      const labels = new Map<string, number>()
-
-      for (const group of pathed) {
-        const segs = parents.get(group.id)!
-        const prefix = segs.slice(-depth).join('/')
-        const base = baseName(group.path!) ?? group.path!
-        group.label = prefix ? `${prefix}/${base}` : base
-        labels.set(group.label, (labels.get(group.label) ?? 0) + 1)
-      }
-
-      if ([...labels.values()].every(count => count === 1)) {
-        break
-      }
-
-      depth += 1
-    }
-  }
-}
-
-export function workspaceGroupsFor(
-  sessions: SessionInfo[],
-  noWorkspaceLabel: string,
-  options: { preserveSessionOrder?: boolean } = {}
-): SidebarSessionGroup[] {
-  const groups = new Map<string, SidebarSessionGroup>()
-
-  for (const session of sessions) {
-    const path = session.cwd?.trim() || ''
-    const id = path || NO_WORKSPACE_ID
-    const label = baseName(path) || path || noWorkspaceLabel
-
-    const group = groups.get(id) ?? { id, label, path: path || null, sessions: [] }
-    group.sessions.push(session)
-    groups.set(id, group)
-  }
-
-  if (!options.preserveSessionOrder) {
-    // Groups keep recency order (Map insertion = first-seen in the recency-sorted
-    // input, so an active project floats up), but rows *within* a group sort by
-    // creation time so they don't reshuffle every time a message lands — keeps
-    // muscle memory intact.
-    for (const group of groups.values()) {
-      group.sessions.sort((a, b) => b.started_at - a.started_at)
-    }
-  }
-
-  const result = [...groups.values()]
-  disambiguateLabels(result)
-
-  return result
-}
-
-/**
- * A worktree's main repo and all its linked worktrees collapse into ONE parent
- * (keyed by the repo root); each worktree is a child group; sessions hang off
- * the worktree they ran in. `parent → worktree → sessions`.
- */
-export interface SidebarWorkspaceTree {
-  id: string
-  label: string
-  path: null | string
-  groups: SidebarSessionGroup[]
-  sessionCount: number
-}
-
-/** Resolves a session cwd to git-worktree identity (from the local fs probe). */
-export type WorktreeResolver = (cwd: string) => HermesWorktreeInfo | null | undefined
-
-interface WorkspacePlacement {
-  parentKey: string
-  parentLabel: string
-  parentPath: string
-  worktreeKey: string
-  worktreeLabel: string
-  worktreePath: string
-}
-
-/** Replace a path's final segment, preserving its prefix + separators. */
-const withBaseName = (path: string, name: string): string =>
-  path.replace(/[/\\]+$/, '').replace(/[^/\\]+$/, name)
-
-/**
- * Path-only fallback for when git metadata is unavailable (remote backends,
- * unreadable paths). Mirrors the git layout: a `<repo>-wt-<branch>` directory
- * nests under its sibling `<repo>`; any other directory is its own repo root.
- */
-function placeByHeuristic(path: string): WorkspacePlacement | null {
-  const base = baseName(path)
-
-  if (!base) {
-    return null
-  }
-
-  const worktreeMatch = base.match(/^(.+)-wt-(.+)$/)
-
-  if (worktreeMatch) {
-    const repo = worktreeMatch[1]
-    const repoPath = withBaseName(path, repo)
-
-    return {
-      parentKey: repoPath,
-      parentLabel: repo,
-      parentPath: repoPath,
-      worktreeKey: path,
-      worktreeLabel: worktreeMatch[2],
-      worktreePath: path
-    }
-  }
-
-  return {
-    parentKey: path,
-    parentLabel: base,
-    parentPath: path,
-    worktreeKey: path,
-    worktreeLabel: base,
-    worktreePath: path
-  }
-}
-
-function placeWorkspace(path: string, resolver?: WorktreeResolver): WorkspacePlacement | null {
-  const info = resolver?.(path)
-
-  if (info?.repoRoot && info.worktreeRoot) {
-    const dirLabel = baseName(info.worktreeRoot) || info.worktreeRoot
-
-    return {
-      parentKey: info.repoRoot,
-      parentLabel: baseName(info.repoRoot) ?? info.repoRoot,
-      parentPath: info.repoRoot,
-      worktreeKey: info.worktreeRoot,
-      // The main checkout's branch is transient — it changes as you work, so a
-      // branch label would misattribute every past session to whatever branch
-      // is checked out *now*. Label it by directory. Linked worktrees are
-      // per-branch by construction, so branch is the clearest label there.
-      worktreeLabel: info.isMainWorktree ? dirLabel : info.branch || dirLabel,
-      worktreePath: info.worktreeRoot
-    }
-  }
-
-  return placeByHeuristic(path)
-}
-
-/** Unique, non-empty session cwds — the batch to probe for worktree info. */
-export function uniqueCwds(sessions: SessionInfo[]): string[] {
-  const seen = new Set<string>()
-
-  for (const session of sessions) {
-    const path = session.cwd?.trim()
-
-    if (path) {
-      seen.add(path)
-    }
-  }
-
-  return [...seen]
-}
-
-/**
- * Build the `parent → worktree → sessions` tree. Parents keep recency order
- * (first-seen in the recency-sorted input); worktree groups within a parent do
- * too, while rows inside a worktree sort by creation time (stable muscle memory,
- * matching `workspaceGroupsFor`).
- */
-export function workspaceTreeFor(
-  sessions: SessionInfo[],
-  noWorkspaceLabel: string,
-  resolver?: WorktreeResolver,
-  options: { preserveSessionOrder?: boolean } = {}
-): SidebarWorkspaceTree[] {
-  interface WorktreeEntry {
-    group: SidebarSessionGroup
-    parentKey: string
-    parentLabel: string
-    parentPath: string
-  }
-
-  const worktrees = new Map<string, WorktreeEntry>()
-  const noWorkspace: SessionInfo[] = []
-
-  for (const session of sessions) {
-    const path = session.cwd?.trim() || ''
-
-    if (!path) {
-      noWorkspace.push(session)
-
-      continue
-    }
-
-    const placement = placeWorkspace(path, resolver)
-
-    if (!placement) {
-      noWorkspace.push(session)
-
-      continue
-    }
-
-    let entry = worktrees.get(placement.worktreeKey)
-
-    if (!entry) {
-      entry = {
-        group: { id: placement.worktreeKey, label: placement.worktreeLabel, path: placement.worktreePath, sessions: [] },
-        parentKey: placement.parentKey,
-        parentLabel: placement.parentLabel,
-        parentPath: placement.parentPath
-      }
-      worktrees.set(placement.worktreeKey, entry)
-    }
-
-    entry.group.sessions.push(session)
-  }
-
-  if (!options.preserveSessionOrder) {
-    for (const entry of worktrees.values()) {
-      entry.group.sessions.sort((a, b) => b.started_at - a.started_at)
-    }
-  }
-
-  const parents = new Map<string, SidebarWorkspaceTree>()
-
-  for (const entry of worktrees.values()) {
-    let parent = parents.get(entry.parentKey)
-
-    if (!parent) {
-      parent = { id: entry.parentKey, label: entry.parentLabel, path: entry.parentPath, groups: [], sessionCount: 0 }
-      parents.set(entry.parentKey, parent)
-    }
-
-    parent.groups.push(entry.group)
-    parent.sessionCount += entry.group.sessions.length
-  }
-
-  const result = [...parents.values()]
-
-  if (noWorkspace.length) {
-    result.push({
-      id: NO_WORKSPACE_ID,
-      label: noWorkspaceLabel,
-      path: null,
-      groups: [{ id: NO_WORKSPACE_ID, label: noWorkspaceLabel, path: null, sessions: noWorkspace }],
-      sessionCount: noWorkspace.length
-    })
-  }
-
-  // Parents that collide on basename grow a path prefix; worktree labels that
-  // collide inside a parent do the same.
-  disambiguateLabels(result)
-
-  for (const parent of result) {
-    disambiguateLabels(parent.groups)
-  }
-
-  return result
-}

apps/desktop/src/app/command-center/index.tsx

@@ -1,5 +1,4 @@
 import { useStore } from '@nanostores/react'
-import { IconBookmark, IconBookmarkFilled, IconDownload, IconTrash } from '@tabler/icons-react'
 import { type MouseEvent, type ReactNode, useCallback, useEffect, useMemo, useRef, useState } from 'react'
 
 import { PageLoader } from '@/components/page-loader'
@@ -17,7 +16,7 @@ import {
 import type { ActionStatusResponse, AnalyticsResponse, StatusResponse } from '@/hermes'
 import { useI18n } from '@/i18n'
 import { sessionTitle } from '@/lib/chat-runtime'
-import { Activity, AlertCircle, BarChart3, Pin } from '@/lib/icons'
+import { Activity, AlertCircle, BarChart3, Bookmark, BookmarkFilled, Download, Pin, Trash2 } from '@/lib/icons'
 import { exportSession } from '@/lib/session-export'
 import { cn } from '@/lib/utils'
 import { upsertDesktopActionTask } from '@/store/activity'
@@ -338,23 +337,23 @@ export function CommandCenterView({ initialSection, onClose, onDeleteSession, on
                             title={pinned ? cc.unpinSession : cc.pinSession}
                           >
                             {pinned ? (
-                              <IconBookmarkFilled className="size-3.5" />
+                              <BookmarkFilled className="size-3.5" />
                             ) : (
-                              <IconBookmark className="size-3.5" />
+                              <Bookmark className="size-3.5" />
                             )}
                           </RowIconButton>
                           <RowIconButton
                             onClick={() => void exportSession(session.id, { session, title: sessionTitle(session) })}
                             title={cc.exportSession}
                           >
-                            <IconDownload className="size-3.5" />
+                            <Download className="size-3.5" />
                           </RowIconButton>
                           <RowIconButton
                             className="hover:text-destructive"
                             onClick={() => void onDeleteSession(session.id)}
                             title={cc.deleteSession}
                           >
-                            <IconTrash className="size-3.5" />
+                            <Trash2 className="size-3.5" />
                           </RowIconButton>
                         </div>
                       </li>

apps/desktop/src/app/command-palette/index.tsx

@@ -20,6 +20,8 @@ import {
   Clock,
   Cpu,
   Download,
+  Egg,
+  GitBranch,
   Globe,
   type IconComponent,
   Info,
@@ -29,6 +31,7 @@ import {
   Moon,
   Package,
   Palette,
+  PawPrint,
   Plus,
   RefreshCw,
   Settings,
@@ -40,8 +43,11 @@ import {
   Zap
 } from '@/lib/icons'
 import { cn } from '@/lib/utils'
-import { $commandPaletteOpen, closeCommandPalette, setCommandPaletteOpen } from '@/store/command-palette'
+import { $repoWorktrees } from '@/store/coding-status'
+import { $commandPaletteOpen, $commandPalettePage, closeCommandPalette, setCommandPaletteOpen } from '@/store/command-palette'
 import { $bindings } from '@/store/keybinds'
+import { openPetGenerate } from '@/store/pet-generate'
+import { requestStartWorkSession } from '@/store/projects'
 import { runGatewayRestart } from '@/store/system-actions'
 import { luminance } from '@/themes/color'
 import { type ThemeMode, useTheme } from '@/themes/context'
@@ -64,6 +70,7 @@ import { fieldCopyForSchemaKey } from '../settings/field-copy'
 import { prettyName } from '../settings/helpers'
 
 import { MarketplaceThemePage } from './marketplace-theme-page'
+import { PetInlineToggle, PetPalettePage } from './pet-palette-page'
 
 interface PaletteItem {
   /** Keybind action id — its live combo renders as a hotkey hint. */
@@ -207,7 +214,9 @@ function themeSupportsMode(name: string, target: 'light' | 'dark'): boolean {
 export function CommandPalette() {
   const { t } = useI18n()
   const open = useStore($commandPaletteOpen)
+  const pendingPage = useStore($commandPalettePage)
   const bindings = useStore($bindings)
+  const worktrees = useStore($repoWorktrees)
   const navigate = useNavigate()
   const { availableThemes, resolvedMode, setMode, setTheme, themeName } = useTheme()
   const [search, setSearch] = useState('')
@@ -252,6 +261,14 @@ export function CommandPalette() {
     }
   }, [open])
 
+  // Deep-link into a nested page (e.g. `/pet list` → pets picker).
+  useEffect(() => {
+    if (open && pendingPage) {
+      setPage(pendingPage)
+      $commandPalettePage.set(null)
+    }
+  }, [open, pendingPage])
+
   const go = useCallback((path: string) => () => navigate(path), [navigate])
 
   // Step up one nested page (or back to the root list), clearing the filter so
@@ -278,6 +295,30 @@ export function CommandPalette() {
     const settingsTab = (tab: string) => `${SETTINGS_ROUTE}?tab=${tab}`
     const cc = t.commandCenter
 
+    // The active repo's worktrees → "new conversation in <branch>". This is the
+    // ⌘K-typed "I want to work on <branch>" reflex: each entry seeds a fresh
+    // session anchored to that worktree's checkout (requestStartWorkSession),
+    // so git is the source of truth and edits land in the right tree.
+    const branchGroup: PaletteGroup[] =
+      worktrees.length > 0
+        ? [
+            {
+              heading: cc.branches,
+              items: worktrees.map(wt => {
+                const name = wt.branch?.trim() || wt.path.split('/').pop() || wt.path
+
+                return {
+                  icon: GitBranch,
+                  id: `worktree-${wt.path}`,
+                  keywords: ['branch', 'worktree', 'switch', name, wt.path],
+                  label: cc.startInBranch(name),
+                  run: () => requestStartWorkSession(wt.path)
+                }
+              })
+            }
+          ]
+        : []
+
     return [
       {
         heading: cc.goTo,
@@ -339,6 +380,7 @@ export function CommandPalette() {
           { action: 'nav.agents', icon: Cpu, id: 'nav-agents', label: t.agents.title, run: go(AGENTS_ROUTE) }
         ]
       },
+      ...branchGroup,
       {
         heading: cc.commandCenter,
         items: [
@@ -391,6 +433,20 @@ export function CommandPalette() {
             keywords: ['appearance', 'color mode', 'brightness', 'dark', 'light', 'system'],
             label: cc.changeColorMode,
             to: 'color-mode'
+          },
+          {
+            icon: PawPrint,
+            id: 'appearance-pets',
+            keywords: ['pet', 'petdex', 'mascot', 'pets', '/pet', 'paw'],
+            label: cc.pets.title,
+            to: 'pets'
+          },
+          {
+            icon: Egg,
+            id: 'appearance-generate-pet',
+            keywords: ['pet', 'generate', 'create', 'make', 'new pet', 'mascot', 'hatch', 'ai'],
+            label: cc.generatePet.title,
+            run: () => openPetGenerate()
           }
         ]
       },
@@ -414,7 +470,7 @@ export function CommandPalette() {
         ]
       }
     ]
-  }, [go, settingsSectionLabel, t])
+  }, [go, settingsSectionLabel, t, worktrees])
 
   // The long, granular lists (settings fields, API keys, MCP servers, archived
   // chats) only surface once the user types — otherwise they'd bury the
@@ -559,6 +615,12 @@ export function CommandPalette() {
           }
         ]
       },
+      // Server-driven page: browse petdex gallery, adopt/switch, toggle off.
+      pets: {
+        title: t.commandCenter.pets.title,
+        placeholder: t.commandCenter.pets.placeholder,
+        groups: []
+      },
       // Server-driven page: items come from the Marketplace, rendered by
       // <MarketplaceThemePage> (loader + live search + per-row install).
       'install-theme': {
@@ -629,49 +691,57 @@ export function CommandPalette() {
                   event.preventDefault()
                   event.stopPropagation()
                   goBack()
+
+                  return
                 }
               }}
               onValueChange={setSearch}
               placeholder={placeholder}
+              right={page === 'pets' ? <PetInlineToggle /> : undefined}
               value={search}
             />
             <CommandList className="dt-portal-scrollbar max-h-[min(20rem,56vh)]">
-              {page === 'install-theme' ? (
+              {/* Server-driven pages render their own list; the rest show groups. */}
+              {page === 'pets' ? (
+                <PetPalettePage onGenerate={() => { closeCommandPalette(); openPetGenerate() }} search={search} />
+              ) : page === 'install-theme' ? (
                 <MarketplaceThemePage onPickTheme={setTheme} search={search} />
               ) : (
-                <CommandEmpty>{t.commandCenter.noResults}</CommandEmpty>
-              )}
-              {visibleGroups.map((group, index) => (
-                <CommandGroup
-                  className={HUD_HEADING}
-                  heading={group.heading}
-                  key={group.heading ?? `palette-group-${index}`}
-                >
-                  {group.items.map(item => {
-                    const Icon = item.icon
-                    const combo = item.action ? bindings[item.action]?.[0] : undefined
+                <>
+                  <CommandEmpty>{t.commandCenter.noResults}</CommandEmpty>
+                  {visibleGroups.map((group, index) => (
+                    <CommandGroup
+                      className={HUD_HEADING}
+                      heading={group.heading}
+                      key={group.heading ?? `palette-group-${index}`}
+                    >
+                      {group.items.map(item => {
+                        const Icon = item.icon
+                        const combo = item.action ? bindings[item.action]?.[0] : undefined
 
-                    return (
-                      <CommandItem
-                        className={cn(HUD_ITEM, HUD_TEXT)}
-                        key={item.id}
-                        keywords={item.keywords}
-                        onSelect={() => handleSelect(item)}
-                        value={`${item.label} ${item.keywords?.join(' ') ?? ''} ${item.id}`}
-                      >
-                        <Icon className="size-3.5 shrink-0 text-muted-foreground" />
-                        <span className="truncate">{item.label}</span>
-                        {combo && <KbdCombo className="ml-auto opacity-55" combo={combo} size="sm" />}
-                        {item.to && (
-                          <ChevronRight
-                            className={cn('size-3.5 shrink-0 text-muted-foreground/70', !combo && 'ml-auto')}
-                          />
-                        )}
-                      </CommandItem>
-                    )
-                  })}
-                </CommandGroup>
-              ))}
+                        return (
+                          <CommandItem
+                            className={cn(HUD_ITEM, HUD_TEXT)}
+                            key={item.id}
+                            keywords={item.keywords}
+                            onSelect={() => handleSelect(item)}
+                            value={`${item.label} ${item.keywords?.join(' ') ?? ''} ${item.id}`}
+                          >
+                            <Icon className="size-3.5 shrink-0 text-muted-foreground" />
+                            <span className="truncate">{item.label}</span>
+                            {combo && <KbdCombo className="ml-auto opacity-55" combo={combo} size="sm" />}
+                            {item.to && (
+                              <ChevronRight
+                                className={cn('size-3.5 shrink-0 text-muted-foreground/70', !combo && 'ml-auto')}
+                              />
+                            )}
+                          </CommandItem>
+                        )
+                      })}
+                    </CommandGroup>
+                  ))}
+                </>
+              )}
             </CommandList>
           </Command>
         </DialogPrimitive.Content>

apps/desktop/src/app/command-palette/pet-palette-page.tsx

@@ -0,0 +1,212 @@
+/**
+ * Cmd-K "Pets…" page — browse the petdex gallery, adopt/switch, toggle off.
+ *
+ * A thin view over the `pet-gallery` store: it subscribes to the shared atoms
+ * and calls the store's actions. The store owns fetching, caching, the thumb
+ * cache, and optimistic mutations, so reopening this page is instant and a
+ * toggle never re-pulls the network gallery.
+ */
+
+import { useStore } from '@nanostores/react'
+import { useEffect, useMemo } from 'react'
+
+import { HUD_ITEM, HUD_TEXT } from '@/app/floating-hud'
+import { useGatewayRequest } from '@/app/gateway/hooks/use-gateway-request'
+import { PetThumb } from '@/components/pet/pet-thumb'
+import { useI18n } from '@/i18n'
+import { triggerHaptic } from '@/lib/haptics'
+import { Check, Egg, Loader2, PawPrint } from '@/lib/icons'
+import { cn } from '@/lib/utils'
+import {
+  $petBusy,
+  $petGallery,
+  $petGalleryError,
+  $petGalleryStatus,
+  adoptPet,
+  loadPetGallery,
+  loadPetThumb,
+  rankedGalleryPets,
+  setPetEnabled
+} from '@/store/pet-gallery'
+
+interface PetPalettePageProps {
+  search: string
+  /** Navigate to the "generate a pet" page (rendered as a header action). */
+  onGenerate?: () => void
+}
+
+export function PetPalettePage({ search, onGenerate }: PetPalettePageProps) {
+  const { t } = useI18n()
+  const copy = t.commandCenter.pets
+  const { requestGateway } = useGatewayRequest()
+
+  const gallery = useStore($petGallery)
+  const status = useStore($petGalleryStatus)
+  const error = useStore($petGalleryError)
+  const busy = useStore($petBusy)
+
+  useEffect(() => {
+    void loadPetGallery(requestGateway)
+  }, [requestGateway])
+
+  const enabled = gallery?.enabled ?? false
+  const active = gallery?.active ?? ''
+
+  const shown = useMemo(() => rankedGalleryPets(gallery, search).slice(0, 50), [gallery, search])
+
+  const adopt = (slug: string) => {
+    void adoptPet(requestGateway, slug, copy.adoptFailed).then(ok => ok && triggerHaptic('crisp'))
+  }
+
+  if (status === 'loading' && !gallery) {
+    return <Status icon={<Loader2 className="size-3.5 animate-spin" />} text={copy.loading} />
+  }
+
+  if (status === 'stale') {
+    return <Status text={copy.staleBackend} tone="error" />
+  }
+
+  if (!gallery?.pets.length && error) {
+    return <Status text={error} tone="error" />
+  }
+
+  const mutating = Boolean(busy)
+
+  return (
+    <div role="listbox">
+      {onGenerate && (
+        <button
+          className={cn(
+            'flex w-full items-center gap-2 rounded-md text-left text-foreground transition-colors hover:bg-(--chrome-action-hover)',
+            HUD_ITEM,
+            HUD_TEXT
+          )}
+          onClick={onGenerate}
+          onMouseDown={event => event.preventDefault()}
+          type="button"
+        >
+          <span className="flex size-8 shrink-0 items-center justify-center rounded-md bg-(--chrome-action-hover)">
+            <Egg className="size-4" />
+          </span>
+          <span className="font-medium">{t.commandCenter.generatePet.title}</span>
+        </button>
+      )}
+
+      {error && <p className="px-2 pb-1 pt-1.5 text-[0.6875rem] text-(--ui-red)">{error}</p>}
+
+      {shown.length === 0 ? (
+        <Status text={copy.empty} />
+      ) : (
+        shown.map(pet => {
+          const isActive = enabled && pet.slug === active
+          const isBusy = busy === pet.slug
+
+          return (
+            <button
+              className={cn(
+                'flex w-full items-center gap-2 rounded-md text-left transition-colors hover:bg-(--chrome-action-hover) disabled:opacity-60',
+                HUD_ITEM,
+                HUD_TEXT,
+                isActive && 'bg-(--chrome-action-hover)/70'
+              )}
+              disabled={mutating && !isBusy}
+              key={pet.slug}
+              onClick={() => adopt(pet.slug)}
+              onMouseDown={event => event.preventDefault()}
+              role="option"
+              type="button"
+            >
+              <PetThumb
+                alt={pet.displayName}
+                load={(slug, url) => loadPetThumb(requestGateway, slug, url)}
+                size={32}
+                slug={pet.slug}
+                url={pet.spritesheetUrl}
+              />
+              <span className="flex min-w-0 flex-col">
+                <span className="flex items-center gap-1.5">
+                  <span className="truncate font-medium">{pet.displayName}</span>
+                  {pet.generated && (
+                    <span className="shrink-0 rounded-full bg-primary/15 px-1.5 py-px text-[0.625rem] font-medium text-primary">
+                      {copy.generatedTag}
+                    </span>
+                  )}
+                </span>
+                <span className="truncate text-[0.6875rem] text-muted-foreground/80">
+                  {pet.slug}
+                  {pet.installed ? ` · ${copy.installed}` : ''}
+                </span>
+              </span>
+              <span className="ml-auto flex shrink-0 items-center text-[0.6875rem] text-muted-foreground">
+                {isBusy ? (
+                  <Loader2 className="size-3 animate-spin" />
+                ) : isActive ? (
+                  <Check className="size-3.5 text-foreground" />
+                ) : null}
+              </span>
+            </button>
+          )
+        })
+      )}
+    </div>
+  )
+}
+
+/**
+ * Single on/off toggle, rendered inline on the palette's search row (see
+ * `CommandInput`'s `right` slot). The paw lights up when pets are on. Reads the
+ * same shared gallery atoms, so it stays in sync with the list below.
+ */
+export function PetInlineToggle() {
+  const { t } = useI18n()
+  const copy = t.commandCenter.pets
+  const { requestGateway } = useGatewayRequest()
+  const gallery = useStore($petGallery)
+  const busy = useStore($petBusy)
+
+  if (!gallery) {
+    return null
+  }
+
+  const enabled = gallery.enabled
+
+  const toggle = () => {
+    void setPetEnabled(requestGateway, !enabled, {
+      noneAvailable: copy.noneAvailable,
+      fallback: copy.toggleFailed
+    }).then(ok => ok && triggerHaptic('crisp'))
+  }
+
+  return (
+    <button
+      aria-label={enabled ? copy.turnOff : copy.turnOn}
+      aria-pressed={enabled}
+      className={cn(
+        'flex shrink-0 items-center justify-center rounded-md p-1.5 transition-colors disabled:opacity-50',
+        enabled ? 'bg-(--chrome-action-hover) text-foreground' : 'text-muted-foreground hover:bg-(--chrome-action-hover)/60'
+      )}
+      disabled={Boolean(busy)}
+      onClick={toggle}
+      // Don't steal focus from the search input on click.
+      onMouseDown={event => event.preventDefault()}
+      title={enabled ? copy.turnOff : copy.turnOn}
+      type="button"
+    >
+      {busy ? <Loader2 className="size-4 animate-spin" /> : <PawPrint className="size-4" />}
+    </button>
+  )
+}
+
+function Status({ icon, text, tone }: { icon?: React.ReactNode; text: string; tone?: 'error' }) {
+  return (
+    <div
+      className={cn(
+        'flex items-center justify-center gap-2 px-2 py-6 text-xs',
+        tone === 'error' ? 'text-(--ui-red)' : 'text-muted-foreground'
+      )}
+    >
+      {icon}
+      {text}
+    </div>
+  )
+}

apps/desktop/src/app/desktop-controller.tsx

@@ -33,6 +33,7 @@ import {
   FILE_BROWSER_MAX_WIDTH,
   FILE_BROWSER_MIN_WIDTH,
   pinSession,
+  PREVIEW_PANE_ID,
   setSidebarOverlayMounted,
   SIDEBAR_DEFAULT_WIDTH,
   SIDEBAR_MAX_WIDTH,
@@ -40,6 +41,8 @@ import {
   unpinSession
 } from '../store/layout'
 import { respondToApprovalAction } from '../store/native-notifications'
+import { setPetActivity } from '../store/pet'
+import { setPetOverlayOpenAppHandler, setPetOverlaySubmitHandler } from '../store/pet-overlay'
 import { $filePreviewTarget, $previewTarget, closeActiveRightRailTab } from '../store/preview'
 import {
   $activeGatewayProfile,
@@ -49,20 +52,24 @@ import {
   normalizeProfileKey,
   refreshActiveProfile
 } from '../store/profile'
+import { $startWorkSessionRequest, resolveNewSessionCwd } from '../store/projects'
+import { $reviewOpen, REVIEW_PANE_ID } from '../store/review'
 import {
   $activeSessionId,
+  $attentionSessionIds,
   $currentCwd,
   $freshDraftReady,
   $gatewayState,
   $messages,
   $messagingSessions,
-  $resumeFailedSessionId,
   $resumeExhaustedSessionId,
+  $resumeFailedSessionId,
   $selectedStoredSessionId,
   $sessions,
   $workingSessionIds,
   CRON_SECTION_LIMIT,
   getRecentlySettledSessionIds,
+  getRememberedSessionId,
   mergeSessionPage,
   MESSAGING_SECTION_LIMIT,
   sessionPinId,
@@ -77,6 +84,7 @@ import {
   setMessagingPlatformTotals,
   setMessagingSessions,
   setMessagingTruncated,
+  setRememberedSessionId,
   setSessionProfileTotals,
   setSessions,
   setSessionsLoading,
@@ -104,7 +112,10 @@ import { useKeybinds } from './hooks/use-keybinds'
 import { SIDEBAR_COLLAPSE_MEDIA_QUERY } from './layout-constants'
 import { ModelPickerOverlay } from './model-picker-overlay'
 import { ModelVisibilityOverlay } from './model-visibility-overlay'
+import { PetGenerateOverlay } from './pet-generate/pet-generate-overlay'
 import { RightSidebarPane } from './right-sidebar'
+import { FileActionDialogs } from './right-sidebar/file-actions'
+import { ReviewPane } from './right-sidebar/review'
 import { $terminalTakeover } from './right-sidebar/store'
 import { PersistentTerminal, TerminalSlot } from './right-sidebar/terminal/persistent'
 import { CRON_ROUTE, NEW_CHAT_ROUTE, routeSessionId, sessionRoute, SETTINGS_ROUTE } from './routes'
@@ -210,6 +221,7 @@ export function DesktopController() {
   const previewTarget = useStore($previewTarget)
   const selectedStoredSessionId = useStore($selectedStoredSessionId)
   const terminalTakeover = useStore($terminalTakeover)
+  const reviewOpen = useStore($reviewOpen)
   const panesFlipped = useStore($panesFlipped)
   const profileScope = useStore($profileScope)
   // Below SIDEBAR_COLLAPSE_BREAKPOINT_PX there's no room for a docked rail —
@@ -278,6 +290,36 @@ export function DesktopController() {
     }
   }, [])
 
+  // Remember the open chat so a relaunch reopens it instead of an empty new-chat.
+  useEffect(() => {
+    if (routedSessionId) {
+      setRememberedSessionId(routedSessionId)
+    }
+  }, [routedSessionId])
+
+  // Restore that chat once, on cold start only (we're at the new-chat route and
+  // haven't navigated yet). A dead/deleted id self-clears via the exhausted latch
+  // below, so we never boot-loop into an error screen.
+  const restoredLastSessionRef = useRef(false)
+  useEffect(() => {
+    if (restoredLastSessionRef.current) {
+      return
+    }
+
+    restoredLastSessionRef.current = true
+    const last = getRememberedSessionId()
+
+    if (last && location.pathname === NEW_CHAT_ROUTE) {
+      navigate(sessionRoute(last), { replace: true })
+    }
+  }, [location.pathname, navigate])
+
+  useEffect(() => {
+    if (resumeExhaustedSessionId && getRememberedSessionId() === resumeExhaustedSessionId) {
+      setRememberedSessionId(null)
+    }
+  }, [resumeExhaustedSessionId])
+
   // Notification click: the main process already focused the window; jump to its
   // session. Notifications are tagged with the gateway *runtime* session id, but
   // the chat route is keyed by the *stored* id — navigating with the runtime id
@@ -471,9 +513,9 @@ export function DesktopController() {
     void refreshMessagingSessions()
   }, [profileScope, refreshCronSessions, refreshCronJobs, refreshMessagingSessions])
 
-  const loadMoreSessions = useCallback(() => {
+  const loadMoreSessions = useCallback(async () => {
     bumpSessionsLimit()
-    void refreshSessions()
+    await refreshSessions()
   }, [refreshSessions])
 
   // Another window mutated the shared session list (e.g. a chat started in the
@@ -546,7 +588,7 @@ export function DesktopController() {
     [activeSessionIdRef, updateSessionState]
   )
 
-  const { changeSessionCwd, refreshProjectBranch } = useCwdActions({
+  const { refreshProjectBranch } = useCwdActions({
     activeSessionId,
     activeSessionIdRef,
     onSessionRuntimeInfo: updateActiveSessionRuntimeInfo,
@@ -662,6 +704,7 @@ export function DesktopController() {
   const {
     archiveSession,
     branchCurrentSession,
+    branchStoredSession,
     createBackendSessionForSend,
     openSettings,
     removeSession,
@@ -794,7 +837,10 @@ export function DesktopController() {
     (path: null | string) => {
       startFreshSessionDraft()
 
-      const target = path?.trim()
+      // A worktree lane carries its own path; the trunk "+" can be path-less (the
+      // main checkout is implicit), so fall back to the active project's root
+      // instead of no-op'ing on null — that was "+ on main does nothing".
+      const target = path?.trim() || resolveNewSessionCwd()
 
       if (!target) {
         return
@@ -813,6 +859,28 @@ export function DesktopController() {
     [requestGateway, startFreshSessionDraft]
   )
 
+  // Composer "branch off into a new worktree": the composer already created the
+  // worktree and cleared its draft; open a fresh session anchored to that tree,
+  // then prefill the task that kicked it off. startSessionInWorkspace owns the
+  // reset+cwd seed (it runs startFreshSessionDraft, which would otherwise stomp
+  // the cwd back to the default), so the prefill is dispatched right after — its
+  // deferred event lands once the fresh composer has remounted and rebound.
+  const startWorkSessionRequest = useStore($startWorkSessionRequest)
+  const lastStartWorkTokenRef = useRef(startWorkSessionRequest?.token ?? 0)
+
+  useEffect(() => {
+    if (!startWorkSessionRequest || startWorkSessionRequest.token === lastStartWorkTokenRef.current) {
+      return
+    }
+
+    lastStartWorkTokenRef.current = startWorkSessionRequest.token
+    startSessionInWorkspace(startWorkSessionRequest.path)
+
+    if (startWorkSessionRequest.draft) {
+      requestComposerInsert(startWorkSessionRequest.draft, { target: 'main' })
+    }
+  }, [startSessionInWorkspace, startWorkSessionRequest])
+
   const handleSkinCommand = useSkinCommand()
 
   const {
@@ -840,6 +908,53 @@ export function DesktopController() {
     updateSessionState
   })
 
+  // The popped-out pet drives two actions back into the app: send a prompt, and
+  // open the most recent thread. Both are registered ONCE through refs that track
+  // the latest callbacks — re-registering on every `submitText`/`resumeSession`
+  // identity change left a brief window where the handler was nulled (cleanup
+  // before re-register), which could drop a submit fired from the overlay (e.g.
+  // creating a session from the new-session screen). The ref form keeps a stable,
+  // always-current handler. Primary window only — it owns the overlay.
+  const submitTextRef = useRef(submitText)
+  submitTextRef.current = submitText
+  const resumeSessionRef = useRef(resumeSession)
+  resumeSessionRef.current = resumeSession
+
+  useEffect(() => {
+    if (isSecondaryWindow()) {
+      return
+    }
+
+    setPetOverlaySubmitHandler(text => void submitTextRef.current(text))
+    // Mail icon: $sessions is ordered most-recent-first; the pet is global (not
+    // per session) so "most recent" is the right target. main.cjs already raised
+    // the window before forwarding this.
+    setPetOverlayOpenAppHandler(() => {
+      const recent = $sessions.get()[0]
+
+      if (recent?.id) {
+        void resumeSessionRef.current(recent.id)
+      }
+    })
+
+    return () => {
+      setPetOverlaySubmitHandler(null)
+      setPetOverlayOpenAppHandler(null)
+    }
+  }, [])
+
+  // Mirror "a session is blocked on the user" (clarify/approval) into the pet's
+  // awaitingInput flag so it shows the `waiting` pose. Lives on $petActivity so
+  // it rides the same atom the pop-out overlay mirrors — no session list needed
+  // there. Every window keeps its own in-window pet in sync.
+  useEffect(() => {
+    const sync = () => setPetActivity({ awaitingInput: $attentionSessionIds.get().length > 0 })
+
+    sync()
+
+    return $attentionSessionIds.listen(sync)
+  }, [])
+
   useGatewayBoot({
     handleGatewayEvent: handleDesktopGatewayEvent,
     onConnectionReady: c => {
@@ -929,6 +1044,7 @@ export function DesktopController() {
     <ChatSidebar
       currentView={currentView}
       onArchiveSession={sessionId => void archiveSession(sessionId)}
+      onBranchSession={sessionId => void branchStoredSession(sessionId)}
       onDeleteSession={sessionId => void removeSession(sessionId)}
       onLoadMoreMessaging={loadMoreMessagingForPlatform}
       onLoadMoreProfileSessions={loadMoreSessionsForProfile}
@@ -977,7 +1093,9 @@ export function DesktopController() {
       <GatewayConnectingOverlay />
       <BootFailureOverlay />
       <CommandPalette />
+      <PetGenerateOverlay />
       <SessionSwitcher />
+      <FileActionDialogs />
 
       {settingsOpen && (
         <Suspense fallback={null}>
@@ -1077,7 +1195,7 @@ export function DesktopController() {
   const previewPane = (
     <Pane
       disabled={!chatOpen || (!previewTarget && !filePreviewTarget)}
-      id="preview"
+      id={PREVIEW_PANE_ID}
       key="preview"
       maxWidth={PREVIEW_RAIL_MAX_WIDTH}
       minWidth={PREVIEW_RAIL_MIN_WIDTH}
@@ -1105,14 +1223,43 @@ export function DesktopController() {
       side={railSide}
       width={FILE_BROWSER_DEFAULT_WIDTH}
     >
+      {/* Key on the project (cwd) so switching projects unmounts the old tree and
+          mounts a fresh one straight into its skeleton — no stale-then-blip. */}
       <RightSidebarPane
+        key={currentCwd || 'no-cwd'}
         onActivateFile={path => composer.insertContextPathInlineRef(path)}
         onActivateFolder={path => composer.insertContextPathInlineRef(path, true)}
-        onChangeCwd={changeSessionCwd}
       />
     </Pane>
   )
 
+  const reviewPane = (
+    <Pane
+      defaultOpen
+      // The diff pane only makes sense in a workspace, so force it shut when the
+      // session is detached — "No diffs" then only ever shows inside a project,
+      // never as a second empty panel next to the file browser.
+      // Docked (wide): `reviewOpen` gates it. Narrow: drop `reviewOpen` from the
+      // gate so the pane stays mounted as a collapsed overlay — `toggleReview`
+      // then slides it in/out via the forced-reveal pin, exactly like ⌘B for the
+      // sidebar. Still requires a repo (no diffs to show otherwise).
+      disabled={!chatOpen || !currentCwd.trim() || (!narrowViewport && !reviewOpen)}
+      forceCollapsed={narrowViewport}
+      hoverReveal
+      id={REVIEW_PANE_ID}
+      key="review"
+      maxWidth={FILE_BROWSER_MAX_WIDTH}
+      minWidth={FILE_BROWSER_MIN_WIDTH}
+      // Mobile overlay sits at its min width — compact, doesn't bury the chat.
+      overlayWidth={FILE_BROWSER_MIN_WIDTH}
+      resizable
+      side={railSide}
+      width={FILE_BROWSER_DEFAULT_WIDTH}
+    >
+      <ReviewPane key={currentCwd || 'no-cwd'} />
+    </Pane>
+  )
+
   const terminalPane = (
     <Pane
       defaultOpen
@@ -1205,6 +1352,7 @@ export function DesktopController() {
       */}
       {panesFlipped ? fileBrowserPane : terminalPane}
       {previewPane}
+      {reviewPane}
       {panesFlipped ? terminalPane : fileBrowserPane}
     </AppShell>
   )

apps/desktop/src/app/gateway/hooks/use-gateway-boot.ts

@@ -40,6 +40,13 @@ import {
 } from '@/store/session'
 import type { RpcEvent } from '@/types/hermes'
 
+// After this many consecutive failed reconnects (≈45s with the 1→15s backoff)
+// raise a recoverable boot error. Otherwise a dropped remote gateway loops the
+// backoff forever behind the fullscreen CONNECTING overlay with no way to reach
+// Settings / sign in / switch to local — the "lost connection breaks the app"
+// dead end. The next successful reconnect clears it.
+const RECONNECT_ESCALATE_AFTER = 6
+
 interface GatewayBootOptions {
   handleGatewayEvent: (event: RpcEvent) => void
   onConnectionReady: (
@@ -105,6 +112,10 @@ export function useGatewayBoot({
     // tick — a stale OAuth ticket fails every attempt and would otherwise stack
     // identical error toasts (and their haptics). Reset on the next clean open.
     let reauthNotified = false
+    // Raised once the reconnect loop crosses RECONNECT_ESCALATE_AFTER so the
+    // recovery overlay replaces the dead-end CONNECTING screen. Reset on a clean
+    // open or a manual/wake-driven reconnect.
+    let escalated = false
 
     // Wrap the live getter in a call so TS control-flow analysis doesn't narrow
     // `connectionState` to a constant across the early-return guards (the state
@@ -171,6 +182,11 @@ export function useGatewayBoot({
         reconnecting = false
 
         if (!cancelled && !gatewayOpen()) {
+          if (reconnectAttempt >= RECONNECT_ESCALATE_AFTER && !escalated) {
+            escalated = true
+            failDesktopBoot(translateNow('boot.errors.gatewayConnectionLost'))
+          }
+
           scheduleReconnect()
         }
       }
@@ -197,6 +213,7 @@ export function useGatewayBoot({
 
       clearReconnectTimer()
       reconnectAttempt = 0
+      escalated = false
       reconnectSecondaryGateways()
 
       if (!gatewayOpen()) {
@@ -230,6 +247,7 @@ export function useGatewayBoot({
       if (st === 'open') {
         reconnectAttempt = 0
         reauthNotified = false
+        escalated = false
         clearReconnectTimer()
 
         // A revalidate-driven reconnect can rebuild the backend in place when the

apps/desktop/src/app/gateway/hooks/use-gateway-request.ts

@@ -94,7 +94,7 @@ export function useGatewayRequest() {
   }, [])
 
   const requestGateway = useCallback(
-    async <T>(method: string, params: Record<string, unknown> = {}) => {
+    async <T>(method: string, params: Record<string, unknown> = {}, timeoutMs?: number, signal?: AbortSignal) => {
       const gateway = gatewayRef.current
 
       if (!gateway) {
@@ -102,7 +102,7 @@ export function useGatewayRequest() {
       }
 
       try {
-        return await gateway.request<T>(method, params)
+        return await gateway.request<T>(method, params, timeoutMs, signal)
       } catch (error) {
         const message = error instanceof Error ? error.message : String(error)
 
@@ -128,7 +128,7 @@ export function useGatewayRequest() {
           throw error
         }
 
-        return recovered.request<T>(method, params)
+        return recovered.request<T>(method, params, timeoutMs, signal)
       }
     },
     [ensureGatewayOpen]