feat(nix): container-aware CLI — auto-route hermes chat into managed container

When container.enable = true in the NixOS module, running 'hermes chat'
on the host now automatically execs into the managed container via
docker/podman exec. This means the interactive CLI runs in the same
environment as the gateway service, with access to all container-installed
packages and tools.

Implementation:
- NixOS activation script writes .container-mode metadata file to
  HERMES_HOME with backend, container_name, and hermes_bin path
- File is removed when container mode is disabled (nixos-rebuild switch)
- hermes_cli/config.py: _is_inside_container() detects Docker/Podman
  indicators (/.dockerenv, /run/.containerenv, cgroup)
- hermes_cli/config.py: get_container_exec_info() reads .container-mode
  metadata, returns None when already inside a container
- hermes_cli/main.py: _exec_in_container() validates the container is
  running, then os.execvp() replaces the process with the container exec
- cmd_chat intercepts before normal flow, checks container info, execs

Safety:
- --host flag bypasses container routing (run on host regardless)
- Falls back to host CLI if: container runtime not found, container not
  running, inspect fails, or any detection error
- Strips --host from forwarded args (not meaningful inside container)
- Already-inside-container detection prevents infinite exec loops

Closes #7380

gateway/channel_directory.py

@@ -76,10 +76,15 @@ def build_channel_directory(adapters: Dict[Any, Any]) -> Dict[str, Any]:
         except Exception as e:
             logger.warning("Channel directory: failed to build %s: %s", platform.value, e)
 
-    # Telegram, WhatsApp & Signal can't enumerate chats -- pull from session history
-    for plat_name in ("telegram", "whatsapp", "signal", "weixin", "email", "sms", "bluebubbles"):
-        if plat_name not in platforms:
-            platforms[plat_name] = _build_from_sessions(plat_name)
+    # Platforms that don't support direct channel enumeration get session-based
+    # discovery automatically.  Skip infrastructure entries that aren't messaging
+    # platforms — everything else falls through to _build_from_sessions().
+    _SKIP_SESSION_DISCOVERY = frozenset({"local", "api_server", "webhook"})
+    for plat in Platform:
+        plat_name = plat.value
+        if plat_name in _SKIP_SESSION_DISCOVERY or plat_name in platforms:
+            continue
+        platforms[plat_name] = _build_from_sessions(plat_name)
 
     directory = {
         "updated_at": datetime.now().isoformat(),

hermes_cli/config.py

@@ -141,6 +141,68 @@ def managed_error(action: str = "modify configuration"):
     print(format_managed_message(action), file=sys.stderr)
 
 
+# =============================================================================
+# Container-aware CLI (NixOS container mode)
+# =============================================================================
+
+def _is_inside_container() -> bool:
+    """Detect if we're already running inside a Docker/Podman container."""
+    # Standard Docker/Podman indicators
+    if os.path.exists("/.dockerenv"):
+        return True
+    # Podman uses /run/.containerenv
+    if os.path.exists("/run/.containerenv"):
+        return True
+    # Check cgroup for container runtime evidence (works for both Docker & Podman)
+    try:
+        with open("/proc/1/cgroup", "r") as f:
+            cgroup = f.read()
+            if "docker" in cgroup or "podman" in cgroup or "/lxc/" in cgroup:
+                return True
+    except (OSError, IOError):
+        pass
+    return False
+
+
+def get_container_exec_info() -> Optional[dict]:
+    """Read container mode metadata from HERMES_HOME/.container-mode.
+
+    Returns a dict with keys: backend, container_name, hermes_bin
+    or None if container mode is not active or we're already inside the container.
+
+    The .container-mode file is written by the NixOS activation script when
+    container.enable = true. It tells the host CLI to exec into the container
+    instead of running locally.
+    """
+    if _is_inside_container():
+        return None
+
+    container_mode_file = get_hermes_home() / ".container-mode"
+    if not container_mode_file.exists():
+        return None
+
+    try:
+        info = {}
+        with open(container_mode_file, "r") as f:
+            for line in f:
+                line = line.strip()
+                if "=" in line and not line.startswith("#"):
+                    key, _, value = line.partition("=")
+                    info[key.strip()] = value.strip()
+
+        backend = info.get("backend", "docker")
+        container_name = info.get("container_name", "hermes-agent")
+        hermes_bin = info.get("hermes_bin", "/data/current-package/bin/hermes")
+
+        return {
+            "backend": backend,
+            "container_name": container_name,
+            "hermes_bin": hermes_bin,
+        }
+    except (OSError, IOError):
+        return None
+
+
 # =============================================================================
 # Config paths
 # =============================================================================

hermes_cli/main.py

@@ -528,6 +528,56 @@ def _resolve_last_cli_session() -> Optional[str]:
     return None
 
 
+def _exec_in_container(container_info: dict, cli_args: list):
+    """Replace the current process with a command inside the managed container.
+
+    Uses os.execvp to hand off to docker/podman exec, preserving the TTY
+    so the interactive CLI works seamlessly inside the container.
+
+    Args:
+        container_info: dict with backend, container_name, hermes_bin
+        cli_args: the original CLI arguments (everything after 'hermes')
+    """
+    import shutil
+    import subprocess
+
+    backend = container_info["backend"]
+    container_name = container_info["container_name"]
+    hermes_bin = container_info["hermes_bin"]
+
+    # Find the container runtime on PATH
+    runtime = shutil.which(backend)
+    if not runtime:
+        print(f"Warning: {backend} not found on PATH, falling back to host CLI.",
+              file=sys.stderr)
+        return  # Fall through to normal CLI
+
+    # Check if the container is actually running
+    try:
+        result = subprocess.run(
+            [runtime, "inspect", "--format", "{{.State.Running}}", container_name],
+            capture_output=True, text=True, timeout=5
+        )
+        if result.returncode != 0 or result.stdout.strip().lower() != "true":
+            print(f"Warning: container '{container_name}' is not running, falling back to host CLI.",
+                  file=sys.stderr)
+            return
+    except (subprocess.TimeoutExpired, OSError):
+        return  # Fall through on any error
+
+    # Filter out --host flag from forwarded args (it's not meaningful inside)
+    forwarded_args = [a for a in cli_args if a != "--host"]
+
+    # Build the exec command
+    exec_cmd = [runtime, "exec", "-it", container_name, hermes_bin] + forwarded_args
+
+    print(f"Routing to container '{container_name}' via {backend}...",
+          file=sys.stderr)
+
+    # Replace the current process — this never returns on success
+    os.execvp(runtime, exec_cmd)
+
+
 def _resolve_session_by_name_or_id(name_or_id: str) -> Optional[str]:
     """Resolve a session name (title) or ID to a session ID.
 
@@ -556,6 +606,21 @@ def _resolve_session_by_name_or_id(name_or_id: str) -> Optional[str]:
 
 def cmd_chat(args):
     """Run interactive chat CLI."""
+    # ── Container-aware routing ──────────────────────────────────────────
+    # When NixOS container mode is active and we're on the host, exec into
+    # the managed container instead of running locally. --host bypasses this.
+    if not getattr(args, "host", False):
+        try:
+            from hermes_cli.config import get_container_exec_info
+            container_info = get_container_exec_info()
+            if container_info:
+                _exec_in_container(container_info, sys.argv[1:])
+                # _exec_in_container calls os.execvp which replaces the process.
+                # If we get here, the exec failed.
+                sys.exit(1)
+        except Exception:
+            pass  # Fall through to normal CLI on any detection error
+
     # Resolve --continue into --resume with the latest CLI session or by name
     continue_val = getattr(args, "continue_last", None)
     if continue_val and not getattr(args, "resume", None):
@@ -4386,6 +4451,12 @@ For more help on a command:
         default=None,
         help="Session source tag for filtering (default: cli). Use 'tool' for third-party integrations that should not appear in user session lists."
     )
+    chat_parser.add_argument(
+        "--host",
+        action="store_true",
+        default=False,
+        help="Run on the host even when NixOS container mode is active (bypass container exec)"
+    )
     chat_parser.set_defaults(func=cmd_chat)
 
     # =========================================================================

nix/nixosModules.nix

@@ -611,6 +611,22 @@
           chown ${cfg.user}:${cfg.group} ${cfg.stateDir}/.hermes/.managed
           chmod 0644 ${cfg.stateDir}/.hermes/.managed
 
+          # Container mode metadata — tells the host CLI to exec into the
+          # container instead of running locally. Removed when container mode
+          # is disabled so the host CLI falls back to native execution.
+          ${if cfg.container.enable then ''
+            cat > ${cfg.stateDir}/.hermes/.container-mode <<'HERMES_CONTAINER_MODE_EOF'
+# Written by NixOS activation script. Do not edit manually.
+backend=${cfg.container.backend}
+container_name=${containerName}
+hermes_bin=${containerDataDir}/current-package/bin/hermes
+HERMES_CONTAINER_MODE_EOF
+            chown ${cfg.user}:${cfg.group} ${cfg.stateDir}/.hermes/.container-mode
+            chmod 0644 ${cfg.stateDir}/.hermes/.container-mode
+          '' else ''
+            rm -f ${cfg.stateDir}/.hermes/.container-mode
+          ''}
+
           # Seed auth file if provided
           ${lib.optionalString (cfg.authFile != null) ''
             ${if cfg.authFileForceOverwrite then ''

pyproject.toml

@@ -88,10 +88,10 @@ all = [
   "hermes-agent[modal]",
   "hermes-agent[daytona]",
   "hermes-agent[messaging]",
-  # matrix excluded: python-olm (required by matrix-nio[e2e]) is upstream-broken
-  # on modern macOS (archived libolm, C++ errors with Clang 21+). Including it
-  # here causes the entire [all] install to fail, dropping all other extras.
-  # Users who need Matrix can install manually: pip install 'hermes-agent[matrix]'
+  # matrix: python-olm (required by matrix-nio[e2e]) is upstream-broken on
+  # modern macOS (archived libolm, C++ errors with Clang 21+).  On Linux the
+  # [matrix] extra's own marker pulls in the [e2e] variant automatically.
+  "hermes-agent[matrix]; sys_platform == 'linux'",
   "hermes-agent[cron]",
   "hermes-agent[cli]",
   "hermes-agent[dev]",

tests/hermes_cli/test_container_aware_cli.py

@@ -0,0 +1,275 @@
+"""Tests for container-aware CLI routing (NixOS container mode).
+
+When container.enable = true in the NixOS module, the activation script
+writes a .container-mode metadata file. The host CLI detects this and
+execs into the container instead of running locally.
+"""
+import os
+from pathlib import Path
+from types import SimpleNamespace
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from hermes_cli.config import (
+    _is_inside_container,
+    get_container_exec_info,
+)
+
+
+# =============================================================================
+# _is_inside_container
+# =============================================================================
+
+
+def test_is_inside_container_dockerenv(tmp_path):
+    """Detects /.dockerenv marker file."""
+    with patch("os.path.exists") as mock_exists:
+        mock_exists.side_effect = lambda p: p == "/.dockerenv"
+        assert _is_inside_container() is True
+
+
+def test_is_inside_container_containerenv(tmp_path):
+    """Detects Podman's /run/.containerenv marker."""
+    with patch("os.path.exists") as mock_exists:
+        mock_exists.side_effect = lambda p: p == "/run/.containerenv"
+        assert _is_inside_container() is True
+
+
+def test_is_inside_container_cgroup_docker():
+    """Detects 'docker' in /proc/1/cgroup."""
+    with patch("os.path.exists", return_value=False), \
+         patch("builtins.open", create=True) as mock_open:
+        mock_open.return_value.__enter__ = lambda s: s
+        mock_open.return_value.__exit__ = MagicMock(return_value=False)
+        mock_open.return_value.read = MagicMock(
+            return_value="12:memory:/docker/abc123\n"
+        )
+        assert _is_inside_container() is True
+
+
+def test_is_inside_container_false_on_host():
+    """Returns False when none of the container indicators are present."""
+    with patch("os.path.exists", return_value=False), \
+         patch("builtins.open", side_effect=OSError("no such file")):
+        assert _is_inside_container() is False
+
+
+# =============================================================================
+# get_container_exec_info
+# =============================================================================
+
+
+@pytest.fixture
+def container_env(tmp_path, monkeypatch):
+    """Set up a fake HERMES_HOME with .container-mode file."""
+    hermes_home = tmp_path / ".hermes"
+    hermes_home.mkdir()
+    monkeypatch.setenv("HERMES_HOME", str(hermes_home))
+
+    container_mode = hermes_home / ".container-mode"
+    container_mode.write_text(
+        "# Written by NixOS activation script. Do not edit manually.\n"
+        "backend=podman\n"
+        "container_name=hermes-agent\n"
+        "hermes_bin=/data/current-package/bin/hermes\n"
+    )
+    return hermes_home
+
+
+def test_get_container_exec_info_returns_metadata(container_env):
+    """Reads .container-mode and returns backend/name/bin."""
+    with patch("hermes_cli.config._is_inside_container", return_value=False):
+        info = get_container_exec_info()
+
+    assert info is not None
+    assert info["backend"] == "podman"
+    assert info["container_name"] == "hermes-agent"
+    assert info["hermes_bin"] == "/data/current-package/bin/hermes"
+
+
+def test_get_container_exec_info_none_inside_container(container_env):
+    """Returns None when we're already inside a container."""
+    with patch("hermes_cli.config._is_inside_container", return_value=True):
+        info = get_container_exec_info()
+
+    assert info is None
+
+
+def test_get_container_exec_info_none_without_file(tmp_path, monkeypatch):
+    """Returns None when .container-mode doesn't exist (native mode)."""
+    hermes_home = tmp_path / ".hermes"
+    hermes_home.mkdir()
+    monkeypatch.setenv("HERMES_HOME", str(hermes_home))
+
+    with patch("hermes_cli.config._is_inside_container", return_value=False):
+        info = get_container_exec_info()
+
+    assert info is None
+
+
+def test_get_container_exec_info_defaults():
+    """Falls back to defaults for missing keys."""
+    import tempfile
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        hermes_home = Path(tmpdir) / ".hermes"
+        hermes_home.mkdir()
+        (hermes_home / ".container-mode").write_text(
+            "# minimal file with no keys\n"
+        )
+
+        with patch("hermes_cli.config._is_inside_container", return_value=False), \
+             patch("hermes_cli.config.get_hermes_home", return_value=hermes_home):
+            info = get_container_exec_info()
+
+        assert info is not None
+        assert info["backend"] == "docker"
+        assert info["container_name"] == "hermes-agent"
+        assert info["hermes_bin"] == "/data/current-package/bin/hermes"
+
+
+def test_get_container_exec_info_docker_backend(container_env):
+    """Correctly reads docker backend."""
+    (container_env / ".container-mode").write_text(
+        "backend=docker\n"
+        "container_name=hermes-custom\n"
+        "hermes_bin=/opt/hermes/bin/hermes\n"
+    )
+
+    with patch("hermes_cli.config._is_inside_container", return_value=False):
+        info = get_container_exec_info()
+
+    assert info["backend"] == "docker"
+    assert info["container_name"] == "hermes-custom"
+    assert info["hermes_bin"] == "/opt/hermes/bin/hermes"
+
+
+# =============================================================================
+# _exec_in_container
+# =============================================================================
+
+
+def test_exec_in_container_calls_execvp():
+    """Verifies os.execvp is called with the correct command."""
+    from hermes_cli.main import _exec_in_container
+
+    container_info = {
+        "backend": "podman",
+        "container_name": "hermes-agent",
+        "hermes_bin": "/data/current-package/bin/hermes",
+    }
+
+    with patch("shutil.which", return_value="/usr/bin/podman"), \
+         patch("subprocess.run") as mock_run, \
+         patch("os.execvp") as mock_exec:
+        # Simulate running container
+        mock_result = MagicMock()
+        mock_result.returncode = 0
+        mock_result.stdout = "true\n"
+        mock_run.return_value = mock_result
+
+        _exec_in_container(container_info, ["chat", "-m", "claude-sonnet-4"])
+
+        mock_exec.assert_called_once_with(
+            "/usr/bin/podman",
+            ["/usr/bin/podman", "exec", "-it", "hermes-agent",
+             "/data/current-package/bin/hermes", "chat", "-m", "claude-sonnet-4"]
+        )
+
+
+def test_exec_in_container_strips_host_flag():
+    """The --host flag is not forwarded into the container."""
+    from hermes_cli.main import _exec_in_container
+
+    container_info = {
+        "backend": "podman",
+        "container_name": "hermes-agent",
+        "hermes_bin": "/data/current-package/bin/hermes",
+    }
+
+    with patch("shutil.which", return_value="/usr/bin/podman"), \
+         patch("subprocess.run") as mock_run, \
+         patch("os.execvp") as mock_exec:
+        mock_result = MagicMock()
+        mock_result.returncode = 0
+        mock_result.stdout = "true\n"
+        mock_run.return_value = mock_result
+
+        _exec_in_container(container_info, ["chat", "--host", "-q", "hello"])
+
+        # --host should be stripped
+        exec_args = mock_exec.call_args[0][1]
+        assert "--host" not in exec_args
+        assert "-q" in exec_args
+        assert "hello" in exec_args
+
+
+def test_exec_in_container_fallback_no_runtime(capsys):
+    """Falls back gracefully when container runtime is not found."""
+    from hermes_cli.main import _exec_in_container
+
+    container_info = {
+        "backend": "podman",
+        "container_name": "hermes-agent",
+        "hermes_bin": "/data/current-package/bin/hermes",
+    }
+
+    with patch("shutil.which", return_value=None), \
+         patch("os.execvp") as mock_exec:
+        _exec_in_container(container_info, ["chat"])
+
+        # Should NOT call execvp — graceful fallback
+        mock_exec.assert_not_called()
+
+    captured = capsys.readouterr()
+    assert "not found on PATH" in captured.err
+
+
+def test_exec_in_container_fallback_container_not_running(capsys):
+    """Falls back when container exists but is not running."""
+    from hermes_cli.main import _exec_in_container
+
+    container_info = {
+        "backend": "docker",
+        "container_name": "hermes-agent",
+        "hermes_bin": "/data/current-package/bin/hermes",
+    }
+
+    with patch("shutil.which", return_value="/usr/bin/docker"), \
+         patch("subprocess.run") as mock_run, \
+         patch("os.execvp") as mock_exec:
+        mock_result = MagicMock()
+        mock_result.returncode = 0
+        mock_result.stdout = "false\n"
+        mock_run.return_value = mock_result
+
+        _exec_in_container(container_info, ["chat"])
+
+        mock_exec.assert_not_called()
+
+    captured = capsys.readouterr()
+    assert "not running" in captured.err
+
+
+def test_exec_in_container_fallback_inspect_fails():
+    """Falls back when docker inspect fails entirely."""
+    from hermes_cli.main import _exec_in_container
+
+    container_info = {
+        "backend": "docker",
+        "container_name": "hermes-agent",
+        "hermes_bin": "/data/current-package/bin/hermes",
+    }
+
+    with patch("shutil.which", return_value="/usr/bin/docker"), \
+         patch("subprocess.run") as mock_run, \
+         patch("os.execvp") as mock_exec:
+        mock_result = MagicMock()
+        mock_result.returncode = 1
+        mock_result.stdout = ""
+        mock_run.return_value = mock_result
+
+        _exec_in_container(container_info, ["chat"])
+
+        mock_exec.assert_not_called()

tests/test_project_metadata.py

@@ -11,12 +11,19 @@ def _load_optional_dependencies():
     return project["optional-dependencies"]
 
 
-def test_matrix_extra_exists_but_excluded_from_all():
+def test_matrix_extra_linux_only_in_all():
     """matrix-nio[e2e] depends on python-olm which is upstream-broken on modern
     macOS (archived libolm, C++ errors with Clang 21+).  The [matrix] extra is
-    kept for opt-in install but deliberately excluded from [all] so one broken
-    upstream dep doesn't nuke every other extra during ``hermes update``."""
+    included in [all] but gated to Linux via a platform marker so that
+    ``hermes update`` doesn't fail on macOS."""
     optional_dependencies = _load_optional_dependencies()
 
     assert "matrix" in optional_dependencies
+    # Must NOT be unconditional — python-olm has no macOS wheels.
     assert "hermes-agent[matrix]" not in optional_dependencies["all"]
+    # Must be present with a Linux platform marker.
+    linux_gated = [
+        dep for dep in optional_dependencies["all"]
+        if "matrix" in dep and "linux" in dep
+    ]
+    assert linux_gated, "expected hermes-agent[matrix] with sys_platform=='linux' marker in [all]"

uv.lock

@@ -1661,7 +1661,7 @@ dependencies = [
     { name = "fal-client" },
     { name = "fire" },
     { name = "firecrawl-py" },
-    { name = "httpx" },
+    { name = "httpx", extra = ["socks"] },
     { name = "jinja2" },
     { name = "openai" },
     { name = "parallel-web" },
@@ -1691,6 +1691,8 @@ all = [
     { name = "faster-whisper" },
     { name = "honcho-ai" },
     { name = "lark-oapi" },
+    { name = "markdown", marker = "sys_platform == 'linux'" },
+    { name = "matrix-nio", extra = ["e2e"], marker = "sys_platform == 'linux'" },
     { name = "mcp" },
     { name = "mistralai" },
     { name = "modal" },
@@ -1827,6 +1829,7 @@ requires-dist = [
     { name = "hermes-agent", extras = ["homeassistant"], marker = "extra == 'all'" },
     { name = "hermes-agent", extras = ["honcho"], marker = "extra == 'all'" },
     { name = "hermes-agent", extras = ["honcho"], marker = "extra == 'termux'" },
+    { name = "hermes-agent", extras = ["matrix"], marker = "sys_platform == 'linux' and extra == 'all'" },
     { name = "hermes-agent", extras = ["mcp"], marker = "extra == 'all'" },
     { name = "hermes-agent", extras = ["mcp"], marker = "extra == 'termux'" },
     { name = "hermes-agent", extras = ["messaging"], marker = "extra == 'all'" },
@@ -1839,7 +1842,7 @@ requires-dist = [
     { name = "hermes-agent", extras = ["tts-premium"], marker = "extra == 'all'" },
     { name = "hermes-agent", extras = ["voice"], marker = "extra == 'all'" },
     { name = "honcho-ai", marker = "extra == 'honcho'", specifier = ">=2.0.1,<3" },
-    { name = "httpx", specifier = ">=0.28.1,<1" },
+    { name = "httpx", extras = ["socks"], specifier = ">=0.28.1,<1" },
     { name = "jinja2", specifier = ">=3.1.5,<4" },
     { name = "lark-oapi", marker = "extra == 'feishu'", specifier = ">=1.5.3,<2" },
     { name = "markdown", marker = "extra == 'matrix'", specifier = ">=3.6,<4" },
@@ -2033,6 +2036,9 @@ wheels = [
 http2 = [
     { name = "h2" },
 ]
+socks = [
+    { name = "socksio" },
+]
 
 [[package]]
 name = "httpx-sse"
@@ -4500,6 +4506,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e9/44/75a9c9421471a6c4805dbf2356f7c181a29c1879239abab1ea2cc8f38b40/sniffio-1.3.1-py3-none-any.whl", hash = "sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2", size = 10235, upload-time = "2024-02-25T23:20:01.196Z" },
 ]
 
+[[package]]
+name = "socksio"
+version = "1.0.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f8/5c/48a7d9495be3d1c651198fd99dbb6ce190e2274d0f28b9051307bdec6b85/socksio-1.0.0.tar.gz", hash = "sha256:f88beb3da5b5c38b9890469de67d0cb0f9d494b78b106ca1845f96c10b91c4ac", size = 19055, upload-time = "2020-04-17T15:50:34.664Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/37/c3/6eeb6034408dac0fa653d126c9204ade96b819c936e136c5e8a6897eee9c/socksio-1.0.0-py3-none-any.whl", hash = "sha256:95dc1f15f9b34e8d7b16f06d74b8ccf48f609af32ab33c608d08761c5dcbb1f3", size = 12763, upload-time = "2020-04-17T15:50:31.878Z" },
+]
+
 [[package]]
 name = "sounddevice"
 version = "0.5.5"

website/docs/getting-started/nix-setup.md

@@ -122,6 +122,17 @@ services.hermes-agent.environmentFiles = [ "/var/lib/hermes/env" ];
 Setting `addToSystemPackages = true` does two things: puts the `hermes` CLI on your system PATH **and** sets `HERMES_HOME` system-wide so the interactive CLI shares state (sessions, skills, cron) with the gateway service. Without it, running `hermes` in your shell creates a separate `~/.hermes/` directory.
 :::
 
+:::info Container-aware CLI
+When `container.enable = true` and `addToSystemPackages = true`, running `hermes chat` on the host **automatically routes into the managed container**. This means your interactive CLI session runs inside the same environment as the gateway service — with access to all container-installed packages and tools.
+
+- The routing is transparent: `hermes chat` detects container mode and does `podman exec` / `docker exec` under the hood
+- All CLI flags are forwarded: `-m`, `--resume`, `--query`, etc. work as normal
+- Use `hermes chat --host` to bypass container routing and run directly on the host
+- If the container isn't running, the CLI falls back to host execution automatically
+
+Other `hermes` subcommands (`version`, `config`, `sessions`, `setup`) always run on the host since they only need access to shared state files.
+:::
+
 ### Verify It Works
 
 After `nixos-rebuild switch`, check that the service is running: