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feat(kanban): core hardening — daemon, circuit breaker, crash detect, logs, notify, bulk, stats

Browse Source 
Eliminates every 'known broken on day one' item in the core functionality
audit. The board is now self-driving (daemon, not cron), self-healing
(crash detection, spawn-failure circuit breaker), and self-reporting
(logs, stats, gateway notifications).

Dispatcher
  - New `hermes kanban daemon` long-lived loop with --interval, --max,
    --failure-limit, --pidfile, --verbose, signal-clean shutdown
    (SIGINT/SIGTERM via threading.Event). A kb.run_daemon() entry point
    lets tests drive it inline without subprocess.
  - `hermes kanban init` now prints the dispatcher setup hint so users
    don't leave the board off-by-default. Ships a systemd user unit at
    plugins/kanban/systemd/hermes-kanban-dispatcher.service.
  - Removed the old 'add this to cron' doc path. Cron runs agent
    prompts (LLM cost per tick) — unacceptable for a per-minute
    coordination loop.

Worker aliveness / safety
  - Spawn returns the child's PID; dispatcher stores it on the task row
    and calls detect_crashed_workers() every tick. If the PID is gone
    but the claim TTL hasn't expired, the task drops back to ready with
    a 'crashed' event. Host-local only — cross-host PIDs are ignored
    per the single-host design.
  - Spawn-failure circuit breaker: after N consecutive spawn_failed
    events on the same task (default 5), the dispatcher auto-blocks
    with the last error as the reason. Success resets the counter.
    Workspace-resolution failures count against the same budget.
  - Log rotation: _rotate_worker_log trims at 2 MiB, keeps one
    generation (.log.1), bounds per-task disk usage at ~4 MiB.

Idempotency / dedup
  - create_task(idempotency_key=...) returns the existing non-archived
    task id for retried webhooks. --idempotency-key on the CLI, json
    body field on the dashboard plugin. Archived tasks don't block a
    fresh create with the same key.

CLI surface
  - Bulk verbs: complete, unblock, archive accept multiple ids;
    block accepts --ids for sibling blocks with the same reason.
  - New verbs: daemon, watch (live event tail filtered by
    assignee/tenant/kinds), stats, log, notify-subscribe,
    notify-list, notify-unsubscribe.
  - dispatch gains --failure-limit + crashed/auto_blocked columns in
    JSON output and human-readable output.
  - gc accepts --event-retention-days / --log-retention-days; prunes
    task_events for terminal tasks and old log files.

Gateway integration
  - New GatewayRunner._kanban_notifier_watcher: polls
    kanban_notify_subs every 5s, pushes ✔/⏸/✖ messages to subscribed
    chats for completed/blocked/spawn_auto_blocked/crashed events.
    Cursor-advanced per-sub; auto-removed when the task reaches
    done/archived. Runs alongside the session expiry and platform
    reconnect watchers — SQLite work in asyncio.to_thread so the
    event loop never blocks.
  - /kanban create in the gateway auto-subscribes the originating
    chat (platform + chat_id + thread_id). Users see
    '(subscribed — you'll be notified when t_abcd completes or
    blocks)' appended to the response.

Dashboard plugin
  - GET /stats returns board_stats (by_status, by_assignee,
    oldest_ready_age_seconds).
  - GET /tasks/:id/log returns the worker log with optional ?tail=N
    cap. 404 on unknown task, exists=false when the task has never
    spawned.
  - POST /tasks accepts idempotency_key; both Pydantic body and the
    create_task kwarg now round-trip.
  - /board attaches task.age (created/started/time_to_complete in
    seconds) so the UI can colour stale cards without recomputing.
  - Card CSS: amber border after N minutes, red border when clearly
    stuck (tier per status: running 10m/60m, ready 1h/24h, todo
    7d/30d, blocked 1h/24h).
  - Drawer: new Worker log section, auto-loads on mount, last 100 KB
    cap with on-disk path surfaced when truncated.

Kernel
  - Schema additions: tasks.idempotency_key, tasks.spawn_failures,
    tasks.worker_pid, tasks.last_spawn_error; new
    kanban_notify_subs table. All gated by _migrate_add_optional_columns
    so legacy DBs upgrade cleanly.
  - release_stale_claims / complete_task / block_task now all clear
    worker_pid so crash detection doesn't false-positive on reclaimed
    tasks.
  - read_worker_log fixed: tail-skip no longer eats one-giant-line
    logs (common with child processes that don't flush newlines
    before dying).

Tests (tests/hermes_cli/test_kanban_core_functionality.py, 28 new)
  - Idempotency: same key returns existing, archived doesn't block,
    no key never collides
  - Circuit breaker: auto-blocks after limit, success resets counter,
    workspace-resolution failure counts against budget
  - Aliveness: _pid_alive helper, detect_crashed_workers reclaims
    exited child
  - Daemon: runs and stops cleanly via stop_event, survives a tick
    exception
  - Stats + task_age helpers
  - Notify subs: CRUD, cursor advances, distinct-thread is a separate row
  - GC: events-only-for-terminal-tasks, old worker logs deleted
  - Log: rotation keeps one generation, read_worker_log tail
  - CLI: bulk complete/archive/unblock/block, create with
    --idempotency-key, stats --json, notify-subscribe+list, log
    missing task, gc reports counts
  - run_slash parity: smoke-tests every registered verb (23
    invocations); none may raise or return empty string

Full kanban test suite: 234/234 pass under scripts/run_tests.sh
(60 original + 30 dashboard plugin + 28 new core + 116 command
registry). Live smoke covers /stats, idempotency, age, log endpoint
with and without content, log?tail= truncation signal, 404 on unknown
task.

Docs (website/docs/user-guide/features/kanban.md)
  - 'Core concepts' rewritten: new statuses (triage), idempotency key,
    dispatcher-as-daemon-not-cron with circuit breaker behaviour
    documented.
  - Quick start swapped to daemon. New systemd section covers user
    service install.
  - New sections: idempotent create, bulk verbs, gateway
    notifications, out-of-scope single-host note (kanban.db is local;
    don't expect multi-host).
  - CLI reference updated for every new verb, every new flag.
This commit is contained in:
Teknium
2026-04-26 13:01:09 -07:00
parent 27fc6c1086
commit af8d43dbbb
9 changed files with 2088 additions and 118 deletions
Download Patch File Download Diff File Expand all files Collapse all files

220
gateway/run.py
View File

@@ -2288,6 +2288,11 @@ class GatewayRunner:
# Start background session expiry watcher to finalize expired sessions
asyncio.create_task(self._session_expiry_watcher())
# Start background kanban notifier — delivers `completed`, `blocked`,
# `spawn_auto_blocked`, and `crashed` events to gateway subscribers
# so human-in-the-loop workflows hear back without polling.
asyncio.create_task(self._kanban_notifier_watcher())
# Start background reconnection watcher for platforms that failed at startup
if self._failed_platforms:
logger.info(
@@ -2463,6 +2468,174 @@ class GatewayRunner:
break
await asyncio.sleep(1)
async def _kanban_notifier_watcher(self, interval: float = 5.0) -> None:
"""Poll ``kanban_notify_subs`` and deliver terminal events to users.
For each subscription row, fetches ``task_events`` newer than the
stored cursor with kind in the terminal set (``completed``,
``blocked``, ``spawn_auto_blocked``, ``crashed``). Sends one message
per new event to ``(platform, chat_id, thread_id)``, then advances
the cursor. When a task reaches a terminal state (``completed`` /
``archived``), the subscription is removed.
Runs in the gateway event loop; all SQLite work is pushed to a
thread via ``asyncio.to_thread`` so the loop never blocks on the
WAL lock. Failures in one tick don't stop subsequent ticks.
"""
from gateway.config import Platform as _Platform
try:
from hermes_cli import kanban_db as _kb
except Exception:
logger.warning("kanban notifier: kanban_db not importable; notifier disabled")
return
TERMINAL_KINDS = ("completed", "blocked", "spawn_auto_blocked", "crashed")
# Initial delay so the gateway can finish wiring adapters.
await asyncio.sleep(5)
while self._running:
try:
def _collect():
conn = _kb.connect()
try:
_kb.init_db() # idempotent; handles first-run
except Exception:
pass
try:
subs = _kb.list_notify_subs(conn)
deliveries: list[dict] = []
for sub in subs:
cursor, events = _kb.unseen_events_for_sub(
conn,
task_id=sub["task_id"],
platform=sub["platform"],
chat_id=sub["chat_id"],
thread_id=sub.get("thread_id") or "",
kinds=TERMINAL_KINDS,
)
if not events:
continue
task = _kb.get_task(conn, sub["task_id"])
deliveries.append({
"sub": sub,
"cursor": cursor,
"events": events,
"task": task,
})
return deliveries
finally:
conn.close()
deliveries = await asyncio.to_thread(_collect)
for d in deliveries:
sub = d["sub"]
task = d["task"]
platform_str = (sub["platform"] or "").lower()
try:
plat = _Platform(platform_str)
except ValueError:
# Unknown platform string; skip and advance cursor so
# we don't replay forever.
await asyncio.to_thread(
self._kanban_advance, sub, d["cursor"],
)
continue
adapter = self.adapters.get(plat)
if adapter is None:
continue # platform not currently connected
title = (task.title if task else sub["task_id"])[:120]
for ev in d["events"]:
kind = ev.kind
if kind == "completed":
result_preview = ""
if task and task.result:
r = task.result.strip().splitlines()[0][:160]
result_preview = f"\n{r}"
msg = (
f"✔ Kanban {sub['task_id']} done"
f" — {title}{result_preview}"
)
elif kind == "blocked":
reason = ""
if ev.payload and ev.payload.get("reason"):
reason = f": {str(ev.payload['reason'])[:160]}"
msg = f"⏸ Kanban {sub['task_id']} blocked{reason}"
elif kind == "spawn_auto_blocked":
err = ""
if ev.payload and ev.payload.get("error"):
err = f"\n{str(ev.payload['error'])[:200]}"
msg = (
f"✖ Kanban {sub['task_id']} auto-blocked "
f"after repeated spawn failures{err}"
)
elif kind == "crashed":
msg = (
f"✖ Kanban {sub['task_id']} worker crashed "
f"(pid gone); dispatcher will retry"
)
else:
continue
metadata: dict[str, Any] = {}
if sub.get("thread_id"):
metadata["thread_id"] = sub["thread_id"]
try:
await adapter.send(
sub["chat_id"], msg, metadata=metadata,
)
except Exception as exc:
logger.warning(
"kanban notifier: send failed for %s on %s: %s",
sub["task_id"], platform_str, exc,
)
# Don't advance cursor on send failure — retry next tick.
break
else:
# All events delivered; advance cursor + maybe unsub.
await asyncio.to_thread(
self._kanban_advance, sub, d["cursor"],
)
if task and task.status in ("done", "archived"):
await asyncio.to_thread(
self._kanban_unsub, sub,
)
except Exception as exc:
logger.warning("kanban notifier tick failed: %s", exc)
# Sleep with cancellation checks.
for _ in range(int(max(1, interval))):
if not self._running:
return
await asyncio.sleep(1)
def _kanban_advance(self, sub: dict, cursor: int) -> None:
"""Sync helper: advance a subscription's cursor. Runs in to_thread."""
from hermes_cli import kanban_db as _kb
conn = _kb.connect()
try:
_kb.advance_notify_cursor(
conn,
task_id=sub["task_id"],
platform=sub["platform"],
chat_id=sub["chat_id"],
thread_id=sub.get("thread_id") or "",
new_cursor=cursor,
)
finally:
conn.close()
def _kanban_unsub(self, sub: dict) -> None:
from hermes_cli import kanban_db as _kb
conn = _kb.connect()
try:
_kb.remove_notify_sub(
conn,
task_id=sub["task_id"],
platform=sub["platform"],
chat_id=sub["chat_id"],
thread_id=sub.get("thread_id") or "",
)
finally:
conn.close()
async def _platform_reconnect_watcher(self) -> None:
"""Background task that periodically retries connecting failed platforms.
@@ -5174,8 +5347,14 @@ class GatewayRunner:
show, context, tail) are permitted while an agent is running;
mutations are allowed too because the board is profile-agnostic
and does not touch the running agent's state.
For ``/kanban create`` invocations we also auto-subscribe the
originating gateway source (platform + chat + thread) to the new
task's terminal events, so the user hears back when the worker
completes / blocks / auto-blocks / crashes without having to poll.
"""
import asyncio
import re
from hermes_cli.kanban import run_slash
text = (event.text or "").strip()
@@ -5185,11 +5364,52 @@ class GatewayRunner:
if text.startswith("kanban"):
text = text[len("kanban"):].lstrip()
is_create = text.split(None, 1)[:1] == ["create"]
try:
output = await asyncio.to_thread(run_slash, text)
except Exception as exc: # pragma: no cover - defensive
return f"⚠ kanban error: {exc}"
# Auto-subscribe on create. Parse the task id from the CLI's standard
# success line ("Created t_abcd (ready, assignee=...)"). If the user
# passed --json we don't subscribe; they're clearly scripting and
# can call /kanban notify-subscribe explicitly.
if is_create and output:
m = re.search(r"Created\s+(t_[0-9a-f]+)\b", output)
if m:
task_id = m.group(1)
try:
source = event.source
platform = getattr(source, "platform", None)
platform_str = (
platform.value if hasattr(platform, "value") else str(platform or "")
).lower()
chat_id = str(getattr(source, "chat_id", "") or "")
thread_id = str(getattr(source, "thread_id", "") or "")
user_id = str(getattr(source, "user_id", "") or "") or None
if platform_str and chat_id:
def _sub():
from hermes_cli import kanban_db as _kb
conn = _kb.connect()
try:
_kb.add_notify_sub(
conn, task_id=task_id,
platform=platform_str, chat_id=chat_id,
thread_id=thread_id or None,
user_id=user_id,
)
finally:
conn.close()
await asyncio.to_thread(_sub)
output = (
output.rstrip()
+ f"\n(subscribed — you'll be notified when {task_id} "
f"completes or blocks)"
)
except Exception as exc:
logger.warning("kanban create auto-subscribe failed: %s", exc)
# Gateway messages have practical length caps; truncate long
# listings to keep the UX reasonable.
if len(output) > 3800:

415
hermes_cli/kanban.py
View File

@@ -132,6 +132,9 @@ def build_parser(parent_subparsers: argparse._SubParsersAction) -> argparse.Argu
p_create.add_argument("--priority", type=int, default=0, help="Priority tiebreaker")
p_create.add_argument("--triage", action="store_true",
help="Park in triage — a specifier will flesh out the spec and promote to todo")
p_create.add_argument("--idempotency-key", default=None,
help="Dedup key. If a non-archived task with this key exists, "
"its id is returned instead of creating a duplicate.")
p_create.add_argument("--created-by", default="user",
help="Author name recorded on the task (default: user)")
p_create.add_argument("--json", action="store_true", help="Emit JSON output")
@@ -182,19 +185,22 @@ def build_parser(parent_subparsers: argparse._SubParsersAction) -> argparse.Argu
p_comment.add_argument("--author", default=None,
help="Author name (default: $HERMES_PROFILE or 'user')")
p_complete = sub.add_parser("complete", help="Mark a task done")
p_complete.add_argument("task_id")
p_complete = sub.add_parser("complete", help="Mark one or more tasks done")
p_complete.add_argument("task_ids", nargs="+",
help="One or more task ids (only --result applies to all of them)")
p_complete.add_argument("--result", default=None, help="Result summary")
p_block = sub.add_parser("block", help="Mark a task blocked (needs input)")
p_block = sub.add_parser("block", help="Mark one or more tasks blocked")
p_block.add_argument("task_id")
p_block.add_argument("reason", nargs="*", help="Reason (also appended as a comment)")
p_block.add_argument("--ids", nargs="+", default=None,
help="Additional task ids to block with the same reason (bulk mode)")
p_unblock = sub.add_parser("unblock", help="Return a blocked task to ready")
p_unblock.add_argument("task_id")
p_unblock = sub.add_parser("unblock", help="Return one or more blocked tasks to ready")
p_unblock.add_argument("task_ids", nargs="+")
p_archive = sub.add_parser("archive", help="Archive a task (hide from default list)")
p_archive.add_argument("task_id")
p_archive = sub.add_parser("archive", help="Archive one or more tasks")
p_archive.add_argument("task_ids", nargs="+")
# --- tail ---
p_tail = sub.add_parser("tail", help="Follow a task's event stream")
@@ -210,8 +216,86 @@ def build_parser(parent_subparsers: argparse._SubParsersAction) -> argparse.Argu
help="Don't actually spawn processes; just print what would happen")
p_disp.add_argument("--max", type=int, default=None,
help="Cap number of spawns this pass")
p_disp.add_argument("--failure-limit", type=int,
default=kb.DEFAULT_SPAWN_FAILURE_LIMIT,
help=f"Auto-block a task after this many consecutive spawn failures "
f"(default: {kb.DEFAULT_SPAWN_FAILURE_LIMIT})")
p_disp.add_argument("--json", action="store_true")
# --- daemon ---
p_daemon = sub.add_parser(
"daemon",
help="Run the dispatcher continuously until SIGINT/SIGTERM",
)
p_daemon.add_argument("--interval", type=float, default=60.0,
help="Seconds between dispatch ticks (default: 60)")
p_daemon.add_argument("--max", type=int, default=None,
help="Cap number of spawns per tick")
p_daemon.add_argument("--failure-limit", type=int,
default=kb.DEFAULT_SPAWN_FAILURE_LIMIT)
p_daemon.add_argument("--pidfile", default=None,
help="Write the daemon's PID to this file on start")
p_daemon.add_argument("--verbose", "-v", action="store_true",
help="Log each tick's outcome to stdout")
# --- watch ---
p_watch = sub.add_parser(
"watch",
help="Live-stream task_events to the terminal (Ctrl+C to exit)",
)
p_watch.add_argument("--assignee", default=None,
help="Only show events for tasks assigned to this profile")
p_watch.add_argument("--tenant", default=None,
help="Only show events from tasks in this tenant")
p_watch.add_argument("--kinds", default=None,
help="Comma-separated event kinds to include "
"(e.g. 'completed,blocked,spawn_auto_blocked')")
p_watch.add_argument("--interval", type=float, default=0.5,
help="Poll interval in seconds (default: 0.5)")
# --- stats ---
p_stats = sub.add_parser(
"stats", help="Per-status + per-assignee counts + oldest-ready age",
)
p_stats.add_argument("--json", action="store_true")
# --- notify subscribe / list / remove ---
p_nsub = sub.add_parser(
"notify-subscribe",
help="Subscribe a gateway source to a task's terminal events "
"(used by /kanban subscribe in the gateway adapter)",
)
p_nsub.add_argument("task_id")
p_nsub.add_argument("--platform", required=True)
p_nsub.add_argument("--chat-id", required=True)
p_nsub.add_argument("--thread-id", default=None)
p_nsub.add_argument("--user-id", default=None)
p_nlist = sub.add_parser(
"notify-list",
help="List notification subscriptions (optionally for a single task)",
)
p_nlist.add_argument("task_id", nargs="?", default=None)
p_nlist.add_argument("--json", action="store_true")
p_nrm = sub.add_parser(
"notify-unsubscribe",
help="Remove a gateway subscription from a task",
)
p_nrm.add_argument("task_id")
p_nrm.add_argument("--platform", required=True)
p_nrm.add_argument("--chat-id", required=True)
p_nrm.add_argument("--thread-id", default=None)
# --- log ---
p_log = sub.add_parser(
"log",
help="Print the worker log for a task (from $HERMES_HOME/kanban/logs/)",
)
p_log.add_argument("task_id")
p_log.add_argument("--tail", type=int, default=None,
help="Only print the last N bytes")
# --- context --- (for spawned workers)
p_ctx = sub.add_parser(
"context",
@@ -221,9 +305,13 @@ def build_parser(parent_subparsers: argparse._SubParsersAction) -> argparse.Argu
p_ctx.add_argument("task_id")
# --- gc ---
sub.add_parser(
"gc", help="Garbage-collect workspaces of archived tasks"
p_gc = sub.add_parser(
"gc", help="Garbage-collect archived-task workspaces, old events, and old logs",
)
p_gc.add_argument("--event-retention-days", type=int, default=30,
help="Delete task_events older than N days for terminal tasks (default: 30)")
p_gc.add_argument("--log-retention-days", type=int, default=30,
help="Delete worker log files older than N days (default: 30)")
kanban_parser.set_defaults(_kanban_parser=kanban_parser)
return kanban_parser
@@ -269,6 +357,13 @@ def kanban_command(args: argparse.Namespace) -> int:
"archive": _cmd_archive,
"tail": _cmd_tail,
"dispatch": _cmd_dispatch,
"daemon": _cmd_daemon,
"watch": _cmd_watch,
"stats": _cmd_stats,
"log": _cmd_log,
"notify-subscribe": _cmd_notify_subscribe,
"notify-list": _cmd_notify_list,
"notify-unsubscribe": _cmd_notify_unsubscribe,
"context": _cmd_context,
"gc": _cmd_gc,
}
@@ -303,6 +398,15 @@ def _profile_author() -> str:
def _cmd_init(args: argparse.Namespace) -> int:
path = kb.init_db()
print(f"Kanban DB initialized at {path}")
print()
print("Next step: run the dispatcher so ready tasks actually get picked up.")
print(" # Foreground (interactive, Ctrl-C to stop):")
print(" hermes kanban daemon")
print()
print(" # As a systemd user unit (persists across logins):")
print(" systemctl --user enable --now hermes-kanban-dispatcher.service")
print()
print("Without a running dispatcher, tasks stay in 'ready' forever.")
return 0
@@ -321,6 +425,7 @@ def _cmd_create(args: argparse.Namespace) -> int:
priority=args.priority,
parents=tuple(args.parent or ()),
triage=bool(getattr(args, "triage", False)),
idempotency_key=getattr(args, "idempotency_key", None),
)
task = kb.get_task(conn, task_id)
if getattr(args, "json", False):
@@ -482,47 +587,69 @@ def _cmd_comment(args: argparse.Namespace) -> int:
def _cmd_complete(args: argparse.Namespace) -> int:
with kb.connect() as conn:
ok = kb.complete_task(conn, args.task_id, result=args.result)
if not ok:
print(f"cannot complete {args.task_id} (unknown id or terminal state)", file=sys.stderr)
"""Mark one or more tasks done. Supports a single id or a list."""
ids = list(args.task_ids or [])
if not ids:
print("at least one task_id is required", file=sys.stderr)
return 1
print(f"Completed {args.task_id}")
return 0
failed: list[str] = []
with kb.connect() as conn:
for tid in ids:
if not kb.complete_task(conn, tid, result=args.result):
failed.append(tid)
print(f"cannot complete {tid} (unknown id or terminal state)", file=sys.stderr)
else:
print(f"Completed {tid}")
return 0 if not failed else 1
def _cmd_block(args: argparse.Namespace) -> int:
reason = " ".join(args.reason).strip() if args.reason else None
author = _profile_author()
ids = [args.task_id] + list(getattr(args, "ids", None) or [])
failed: list[str] = []
with kb.connect() as conn:
if reason:
kb.add_comment(conn, args.task_id, author, f"BLOCKED: {reason}")
ok = kb.block_task(conn, args.task_id, reason=reason)
if not ok:
print(f"cannot block {args.task_id}", file=sys.stderr)
return 1
print(f"Blocked {args.task_id}" + (f": {reason}" if reason else ""))
return 0
for tid in ids:
if reason:
kb.add_comment(conn, tid, author, f"BLOCKED: {reason}")
if not kb.block_task(conn, tid, reason=reason):
failed.append(tid)
print(f"cannot block {tid}", file=sys.stderr)
else:
print(f"Blocked {tid}" + (f": {reason}" if reason else ""))
return 0 if not failed else 1
def _cmd_unblock(args: argparse.Namespace) -> int:
with kb.connect() as conn:
ok = kb.unblock_task(conn, args.task_id)
if not ok:
print(f"cannot unblock {args.task_id} (not blocked?)", file=sys.stderr)
ids = list(args.task_ids or [])
if not ids:
print("at least one task_id is required", file=sys.stderr)
return 1
print(f"Unblocked {args.task_id}")
return 0
failed: list[str] = []
with kb.connect() as conn:
for tid in ids:
if not kb.unblock_task(conn, tid):
failed.append(tid)
print(f"cannot unblock {tid} (not blocked?)", file=sys.stderr)
else:
print(f"Unblocked {tid}")
return 0 if not failed else 1
def _cmd_archive(args: argparse.Namespace) -> int:
with kb.connect() as conn:
ok = kb.archive_task(conn, args.task_id)
if not ok:
print(f"cannot archive {args.task_id}", file=sys.stderr)
ids = list(args.task_ids or [])
if not ids:
print("at least one task_id is required", file=sys.stderr)
return 1
print(f"Archived {args.task_id}")
return 0
failed: list[str] = []
with kb.connect() as conn:
for tid in ids:
if not kb.archive_task(conn, tid):
failed.append(tid)
print(f"cannot archive {tid}", file=sys.stderr)
else:
print(f"Archived {tid}")
return 0 if not failed else 1
def _cmd_tail(args: argparse.Namespace) -> int:
@@ -549,10 +676,13 @@ def _cmd_dispatch(args: argparse.Namespace) -> int:
conn,
dry_run=args.dry_run,
max_spawn=args.max,
failure_limit=getattr(args, "failure_limit", kb.DEFAULT_SPAWN_FAILURE_LIMIT),
)
if getattr(args, "json", False):
print(json.dumps({
"reclaimed": res.reclaimed,
"crashed": res.crashed,
"auto_blocked": res.auto_blocked,
"promoted": res.promoted,
"spawned": [
{"task_id": tid, "assignee": who, "workspace": ws}
@@ -561,9 +691,15 @@ def _cmd_dispatch(args: argparse.Namespace) -> int:
"skipped_unassigned": res.skipped_unassigned,
}, indent=2))
return 0
print(f"Reclaimed: {res.reclaimed}")
print(f"Promoted: {res.promoted}")
print(f"Spawned: {len(res.spawned)}")
print(f"Reclaimed: {res.reclaimed}")
print(f"Crashed: {len(res.crashed)}")
if res.crashed:
print(f" {', '.join(res.crashed)}")
print(f"Auto-blocked: {len(res.auto_blocked)}")
if res.auto_blocked:
print(f" {', '.join(res.auto_blocked)}")
print(f"Promoted: {res.promoted}")
print(f"Spawned: {len(res.spawned)}")
for tid, who, ws in res.spawned:
tag = " (dry)" if args.dry_run else ""
print(f" - {tid} -> {who} @ {ws or '-'}{tag}")
@@ -572,6 +708,184 @@ def _cmd_dispatch(args: argparse.Namespace) -> int:
return 0
def _cmd_daemon(args: argparse.Namespace) -> int:
"""Run the dispatcher continuously. Foreground-safe, signal-clean."""
# Make sure the DB exists before printing "started" so the user sees the
# correct DB path and any init error surfaces immediately.
kb.init_db()
pidfile = getattr(args, "pidfile", None)
if pidfile:
try:
Path(pidfile).parent.mkdir(parents=True, exist_ok=True)
Path(pidfile).write_text(str(os.getpid()), encoding="utf-8")
except OSError as exc:
print(f"warning: could not write pidfile {pidfile}: {exc}", file=sys.stderr)
verbose = bool(getattr(args, "verbose", False))
print(f"Kanban dispatcher running (interval={args.interval}s, pid={os.getpid()}). "
f"Ctrl-C to stop.")
def _on_tick(res):
if not verbose:
return
did_work = (
res.reclaimed or res.crashed or res.promoted
or res.spawned or res.auto_blocked
)
if did_work:
print(
f"[{_fmt_ts(int(time.time()))}] "
f"reclaimed={res.reclaimed} crashed={len(res.crashed)} "
f"promoted={res.promoted} spawned={len(res.spawned)} "
f"auto_blocked={len(res.auto_blocked)}",
flush=True,
)
try:
kb.run_daemon(
interval=args.interval,
max_spawn=args.max,
failure_limit=getattr(args, "failure_limit", kb.DEFAULT_SPAWN_FAILURE_LIMIT),
on_tick=_on_tick,
)
finally:
if pidfile:
try:
Path(pidfile).unlink()
except OSError:
pass
print("(dispatcher stopped)")
return 0
def _cmd_watch(args: argparse.Namespace) -> int:
"""Live-stream task_events to the terminal."""
kinds = (
{k.strip() for k in args.kinds.split(",") if k.strip()}
if args.kinds else None
)
cursor = 0
print("Watching kanban events. Ctrl-C to stop.", flush=True)
# Seed cursor at the latest id so we don't replay history.
with kb.connect() as conn:
row = conn.execute(
"SELECT COALESCE(MAX(id), 0) AS m FROM task_events"
).fetchone()
cursor = int(row["m"])
try:
while True:
with kb.connect() as conn:
rows = conn.execute(
"SELECT e.id, e.task_id, e.kind, e.payload, e.created_at, "
" t.assignee, t.tenant "
"FROM task_events e LEFT JOIN tasks t ON t.id = e.task_id "
"WHERE e.id > ? ORDER BY e.id ASC LIMIT 200",
(cursor,),
).fetchall()
for r in rows:
cursor = max(cursor, int(r["id"]))
if kinds and r["kind"] not in kinds:
continue
if args.assignee and r["assignee"] != args.assignee:
continue
if args.tenant and r["tenant"] != args.tenant:
continue
try:
payload = json.loads(r["payload"]) if r["payload"] else None
except Exception:
payload = None
pl = f" {payload}" if payload else ""
print(
f"[{_fmt_ts(r['created_at'])}] {r['task_id']:10s} "
f"{r['kind']:18s} (@{r['assignee'] or '-'}){pl}",
flush=True,
)
time.sleep(max(0.1, args.interval))
except KeyboardInterrupt:
print("\n(stopped)")
return 0
def _cmd_stats(args: argparse.Namespace) -> int:
with kb.connect() as conn:
stats = kb.board_stats(conn)
if getattr(args, "json", False):
print(json.dumps(stats, indent=2, ensure_ascii=False))
return 0
print("By status:")
for k in ("triage", "todo", "ready", "running", "blocked", "done"):
print(f" {k:8s} {stats['by_status'].get(k, 0)}")
if stats["by_assignee"]:
print("\nBy assignee:")
for who, counts in sorted(stats["by_assignee"].items()):
parts = ", ".join(f"{k}={v}" for k, v in sorted(counts.items()))
print(f" {who:20s} {parts}")
age = stats["oldest_ready_age_seconds"]
if age is not None:
print(f"\nOldest ready task age: {int(age)}s")
return 0
def _cmd_notify_subscribe(args: argparse.Namespace) -> int:
with kb.connect() as conn:
if kb.get_task(conn, args.task_id) is None:
print(f"no such task: {args.task_id}", file=sys.stderr)
return 1
kb.add_notify_sub(
conn, task_id=args.task_id,
platform=args.platform, chat_id=args.chat_id,
thread_id=args.thread_id, user_id=args.user_id,
)
print(f"Subscribed {args.platform}:{args.chat_id}"
+ (f":{args.thread_id}" if args.thread_id else "")
+ f" to {args.task_id}")
return 0
def _cmd_notify_list(args: argparse.Namespace) -> int:
with kb.connect() as conn:
subs = kb.list_notify_subs(conn, args.task_id)
if getattr(args, "json", False):
print(json.dumps(subs, indent=2, ensure_ascii=False))
return 0
if not subs:
print("(no subscriptions)")
return 0
for s in subs:
thr = f":{s['thread_id']}" if s.get("thread_id") else ""
print(f" {s['task_id']:10s} {s['platform']}:{s['chat_id']}{thr}"
f" (since event {s['last_event_id']})")
return 0
def _cmd_notify_unsubscribe(args: argparse.Namespace) -> int:
with kb.connect() as conn:
ok = kb.remove_notify_sub(
conn, task_id=args.task_id,
platform=args.platform, chat_id=args.chat_id,
thread_id=args.thread_id,
)
if not ok:
print("(no such subscription)", file=sys.stderr)
return 1
print(f"Unsubscribed from {args.task_id}")
return 0
def _cmd_log(args: argparse.Namespace) -> int:
content = kb.read_worker_log(args.task_id, tail_bytes=args.tail)
if content is None:
print(f"(no log for {args.task_id} — task may not have spawned yet)",
file=sys.stderr)
return 1
sys.stdout.write(content)
if not content.endswith("\n"):
sys.stdout.write("\n")
return 0
def _cmd_context(args: argparse.Namespace) -> int:
with kb.connect() as conn:
text = kb.build_worker_context(conn, args.task_id)
@@ -580,14 +894,11 @@ def _cmd_context(args: argparse.Namespace) -> int:
def _cmd_gc(args: argparse.Namespace) -> int:
"""Remove scratch workspaces of archived tasks.
Only touches directories under the default scratch root; leaves user
``dir:`` workspaces and ``worktree`` dirs alone (user owns those).
"""
"""Remove scratch workspaces of archived tasks, prune old events, and
delete old worker logs."""
import shutil
scratch_root = kb.workspaces_root()
removed = 0
removed_ws = 0
with kb.connect() as conn:
rows = conn.execute(
"SELECT id, workspace_kind, workspace_path FROM tasks WHERE status = 'archived'"
@@ -601,15 +912,25 @@ def _cmd_gc(args: argparse.Namespace) -> int:
except OSError:
continue
try:
scratch_root.resolve().relative_to(scratch_root.resolve())
path.relative_to(scratch_root.resolve())
except ValueError:
# Safety: never delete outside the scratch root.
continue
if path.exists() and path.is_dir():
shutil.rmtree(path, ignore_errors=True)
removed += 1
print(f"GC complete: removed {removed} scratch workspace(s)")
removed_ws += 1
event_days = getattr(args, "event_retention_days", 30)
log_days = getattr(args, "log_retention_days", 30)
with kb.connect() as conn:
removed_events = kb.gc_events(
conn, older_than_seconds=event_days * 24 * 3600,
)
removed_logs = kb.gc_worker_logs(
older_than_seconds=log_days * 24 * 3600,
)
print(f"GC complete: {removed_ws} workspace(s), "
f"{removed_events} event row(s), {removed_logs} log file(s) removed")
return 0

671
hermes_cli/kanban_db.py
View File

@@ -84,9 +84,14 @@ class Task:
claim_expires: Optional[int]
tenant: Optional[str]
result: Optional[str] = None
idempotency_key: Optional[str] = None
spawn_failures: int = 0
worker_pid: Optional[int] = None
last_spawn_error: Optional[str] = None
@classmethod
def from_row(cls, row: sqlite3.Row) -> "Task":
keys = set(row.keys())
return cls(
id=row["id"],
title=row["title"],
@@ -102,8 +107,12 @@ class Task:
workspace_path=row["workspace_path"],
claim_lock=row["claim_lock"],
claim_expires=row["claim_expires"],
tenant=row["tenant"] if "tenant" in row.keys() else None,
result=row["result"] if "result" in row.keys() else None,
tenant=row["tenant"] if "tenant" in keys else None,
result=row["result"] if "result" in keys else None,
idempotency_key=row["idempotency_key"] if "idempotency_key" in keys else None,
spawn_failures=row["spawn_failures"] if "spawn_failures" in keys else 0,
worker_pid=row["worker_pid"] if "worker_pid" in keys else None,
last_spawn_error=row["last_spawn_error"] if "last_spawn_error" in keys else None,
)
@@ -131,22 +140,26 @@ class Event:
SCHEMA_SQL = """
CREATE TABLE IF NOT EXISTS tasks (
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
body TEXT,
assignee TEXT,
status TEXT NOT NULL,
priority INTEGER DEFAULT 0,
created_by TEXT,
created_at INTEGER NOT NULL,
started_at INTEGER,
completed_at INTEGER,
workspace_kind TEXT NOT NULL DEFAULT 'scratch',
workspace_path TEXT,
claim_lock TEXT,
claim_expires INTEGER,
tenant TEXT,
result TEXT
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
body TEXT,
assignee TEXT,
status TEXT NOT NULL,
priority INTEGER DEFAULT 0,
created_by TEXT,
created_at INTEGER NOT NULL,
started_at INTEGER,
completed_at INTEGER,
workspace_kind TEXT NOT NULL DEFAULT 'scratch',
workspace_path TEXT,
claim_lock TEXT,
claim_expires INTEGER,
tenant TEXT,
result TEXT,
idempotency_key TEXT,
spawn_failures INTEGER NOT NULL DEFAULT 0,
worker_pid INTEGER,
last_spawn_error TEXT
);
CREATE TABLE IF NOT EXISTS task_links (
@@ -171,13 +184,30 @@ CREATE TABLE IF NOT EXISTS task_events (
created_at INTEGER NOT NULL
);
-- Subscription from a gateway source (platform + chat + thread) to a
-- task. The gateway's kanban-notifier watcher tails task_events and
-- pushes ``completed`` / ``blocked`` / ``spawn_auto_blocked`` events to
-- the original requester so human-in-the-loop workflows close the loop.
CREATE TABLE IF NOT EXISTS kanban_notify_subs (
task_id TEXT NOT NULL,
platform TEXT NOT NULL,
chat_id TEXT NOT NULL,
thread_id TEXT NOT NULL DEFAULT '',
user_id TEXT,
created_at INTEGER NOT NULL,
last_event_id INTEGER NOT NULL DEFAULT 0,
PRIMARY KEY (task_id, platform, chat_id, thread_id)
);
CREATE INDEX IF NOT EXISTS idx_tasks_assignee_status ON tasks(assignee, status);
CREATE INDEX IF NOT EXISTS idx_tasks_status ON tasks(status);
CREATE INDEX IF NOT EXISTS idx_tasks_tenant ON tasks(tenant);
CREATE INDEX IF NOT EXISTS idx_tasks_idempotency ON tasks(idempotency_key);
CREATE INDEX IF NOT EXISTS idx_links_child ON task_links(child_id);
CREATE INDEX IF NOT EXISTS idx_links_parent ON task_links(parent_id);
CREATE INDEX IF NOT EXISTS idx_comments_task ON task_comments(task_id, created_at);
CREATE INDEX IF NOT EXISTS idx_events_task ON task_events(task_id, created_at);
CREATE INDEX IF NOT EXISTS idx_notify_task ON kanban_notify_subs(task_id);
"""
@@ -220,6 +250,20 @@ def _migrate_add_optional_columns(conn: sqlite3.Connection) -> None:
conn.execute("ALTER TABLE tasks ADD COLUMN tenant TEXT")
if "result" not in cols:
conn.execute("ALTER TABLE tasks ADD COLUMN result TEXT")
if "idempotency_key" not in cols:
conn.execute("ALTER TABLE tasks ADD COLUMN idempotency_key TEXT")
conn.execute(
"CREATE INDEX IF NOT EXISTS idx_tasks_idempotency "
"ON tasks(idempotency_key)"
)
if "spawn_failures" not in cols:
conn.execute(
"ALTER TABLE tasks ADD COLUMN spawn_failures INTEGER NOT NULL DEFAULT 0"
)
if "worker_pid" not in cols:
conn.execute("ALTER TABLE tasks ADD COLUMN worker_pid INTEGER")
if "last_spawn_error" not in cols:
conn.execute("ALTER TABLE tasks ADD COLUMN last_spawn_error TEXT")
@contextlib.contextmanager
@@ -280,6 +324,7 @@ def create_task(
priority: int = 0,
parents: Iterable[str] = (),
triage: bool = False,
idempotency_key: Optional[str] = None,
) -> str:
"""Create a new task and optionally link it under parent tasks.
@@ -288,6 +333,11 @@ def create_task(
If ``triage=True``, status is forced to ``triage`` regardless of
parents — a specifier/triager is expected to promote the task to
``todo`` once the spec is fleshed out.
If ``idempotency_key`` is provided and a non-archived task with the
same key already exists, returns the existing task's id instead of
creating a duplicate. Useful for retried webhooks / automation that
should not double-write.
"""
if not title or not title.strip():
raise ValueError("title is required")
@@ -298,6 +348,21 @@ def create_task(
)
parents = tuple(p for p in parents if p)
# Idempotency check — return the existing task instead of creating a
# duplicate. Done BEFORE entering write_txn to keep the fast path fast
# and to avoid holding a write lock during the lookup. Race is
# acceptable: two concurrent creators with the same key might both
# insert, at which point both rows exist but the next lookup stabilises.
if idempotency_key:
row = conn.execute(
"SELECT id FROM tasks WHERE idempotency_key = ? "
"AND status != 'archived' "
"ORDER BY created_at DESC LIMIT 1",
(idempotency_key,),
).fetchone()
if row:
return row["id"]
now = int(time.time())
# Retry once on the extremely unlikely id collision.
@@ -335,8 +400,8 @@ def create_task(
INSERT INTO tasks (
id, title, body, assignee, status, priority,
created_by, created_at, workspace_kind, workspace_path,
tenant
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
tenant, idempotency_key
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
""",
(
task_id,
@@ -350,6 +415,7 @@ def create_task(
workspace_kind,
workspace_path,
tenant,
idempotency_key,
),
)
for pid in parents:
@@ -743,7 +809,7 @@ def release_stale_claims(conn: sqlite3.Connection) -> int:
for row in stale:
conn.execute(
"UPDATE tasks SET status = 'ready', claim_lock = NULL, "
"claim_expires = NULL "
"claim_expires = NULL, worker_pid = NULL "
"WHERE id = ? AND status = 'running'",
(row["id"],),
)
@@ -776,7 +842,8 @@ def complete_task(
result = ?,
completed_at = ?,
claim_lock = NULL,
claim_expires= NULL
claim_expires= NULL,
worker_pid = NULL
WHERE id = ?
AND status IN ('running', 'ready', 'blocked')
""",
@@ -806,7 +873,8 @@ def block_task(
UPDATE tasks
SET status = 'blocked',
claim_lock = NULL,
claim_expires= NULL
claim_expires= NULL,
worker_pid = NULL
WHERE id = ?
AND status IN ('running', 'ready')
""",
@@ -897,6 +965,17 @@ def set_workspace_path(
# Dispatcher (one-shot pass)
# ---------------------------------------------------------------------------
# After this many consecutive `spawn_failed` events on a task, the dispatcher
# stops retrying and parks the task in ``blocked`` with a reason so a human
# can investigate. Prevents the dispatcher from thrashing forever on a task
# whose profile doesn't exist, whose workspace is unmountable, etc.
DEFAULT_SPAWN_FAILURE_LIMIT = 5
# Max bytes to keep in a single worker log file. The dispatcher truncates
# and rotates on spawn if the file is larger than this at spawn time.
DEFAULT_LOG_ROTATE_BYTES = 2 * 1024 * 1024 # 2 MiB
@dataclass
class DispatchResult:
"""Outcome of a single ``dispatch`` pass."""
@@ -906,6 +985,137 @@ class DispatchResult:
spawned: list[tuple[str, str, str]] = field(default_factory=list)
"""List of ``(task_id, assignee, workspace_path)`` triples."""
skipped_unassigned: list[str] = field(default_factory=list)
crashed: list[str] = field(default_factory=list)
"""Task ids reclaimed because their worker PID disappeared."""
auto_blocked: list[str] = field(default_factory=list)
"""Task ids auto-blocked by the spawn-failure circuit breaker."""
def _pid_alive(pid: Optional[int]) -> bool:
"""Return True if ``pid`` is still running on this host.
Cross-platform: uses ``os.kill(pid, 0)`` on POSIX and ``OpenProcess``
on Windows. Returns False for falsy PIDs or on any OS error.
"""
if not pid or pid <= 0:
return False
try:
if hasattr(os, "kill"):
os.kill(int(pid), 0)
return True
except ProcessLookupError:
return False
except PermissionError:
# Process exists, we just can't signal it.
return True
except OSError:
return False
return True
def detect_crashed_workers(conn: sqlite3.Connection) -> list[str]:
"""Reclaim ``running`` tasks whose worker PID is no longer alive.
Appends a ``crashed`` event and drops the task back to ``ready``.
Different from ``release_stale_claims``: this checks liveness
immediately rather than waiting for the claim TTL.
Only considers tasks claimed by *this host* — PIDs from other hosts
are meaningless here. The host-local check is enough because
``_default_spawn`` always runs the worker on the same host as the
dispatcher (the whole design is single-host).
"""
crashed: list[str] = []
with write_txn(conn):
rows = conn.execute(
"SELECT id, worker_pid, claim_lock FROM tasks "
"WHERE status = 'running' AND worker_pid IS NOT NULL"
).fetchall()
host_prefix = f"{_claimer_id().split(':', 1)[0]}:"
for row in rows:
# Only check liveness for claims owned by this host.
lock = row["claim_lock"] or ""
if not lock.startswith(host_prefix):
continue
if _pid_alive(row["worker_pid"]):
continue
cur = conn.execute(
"UPDATE tasks SET status = 'ready', claim_lock = NULL, "
"claim_expires = NULL, worker_pid = NULL "
"WHERE id = ? AND status = 'running'",
(row["id"],),
)
if cur.rowcount == 1:
_append_event(
conn, row["id"], "crashed",
{"pid": int(row["worker_pid"]), "claimer": row["claim_lock"]},
)
crashed.append(row["id"])
return crashed
def _record_spawn_failure(
conn: sqlite3.Connection,
task_id: str,
error: str,
*,
failure_limit: int = DEFAULT_SPAWN_FAILURE_LIMIT,
) -> bool:
"""Release the claim, increment the failure counter, maybe auto-block.
Returns True when the task was auto-blocked (N failures exceeded),
False when it was just released back to ``ready`` for another try.
"""
blocked = False
with write_txn(conn):
row = conn.execute(
"SELECT spawn_failures FROM tasks WHERE id = ?", (task_id,),
).fetchone()
failures = int(row["spawn_failures"]) + 1 if row else 1
if failures >= failure_limit:
conn.execute(
"UPDATE tasks SET status = 'blocked', claim_lock = NULL, "
"claim_expires = NULL, worker_pid = NULL, "
"spawn_failures = ?, last_spawn_error = ? "
"WHERE id = ? AND status IN ('running', 'ready')",
(failures, error[:500], task_id),
)
_append_event(
conn, task_id, "spawn_auto_blocked",
{"failures": failures, "error": error[:500]},
)
blocked = True
else:
conn.execute(
"UPDATE tasks SET status = 'ready', claim_lock = NULL, "
"claim_expires = NULL, worker_pid = NULL, "
"spawn_failures = ?, last_spawn_error = ? "
"WHERE id = ? AND status = 'running'",
(failures, error[:500], task_id),
)
_append_event(
conn, task_id, "spawn_failed",
{"error": error[:500], "failures": failures},
)
return blocked
def _set_worker_pid(conn: sqlite3.Connection, task_id: str, pid: int) -> None:
with write_txn(conn):
conn.execute(
"UPDATE tasks SET worker_pid = ? WHERE id = ?",
(int(pid), task_id),
)
def _clear_spawn_failures(conn: sqlite3.Connection, task_id: str) -> None:
"""Reset the failure counter after a successful spawn."""
with write_txn(conn):
conn.execute(
"UPDATE tasks SET spawn_failures = 0, last_spawn_error = NULL "
"WHERE id = ?",
(task_id,),
)
def dispatch_once(
@@ -915,21 +1125,28 @@ def dispatch_once(
ttl_seconds: int = DEFAULT_CLAIM_TTL_SECONDS,
dry_run: bool = False,
max_spawn: Optional[int] = None,
failure_limit: int = DEFAULT_SPAWN_FAILURE_LIMIT,
) -> DispatchResult:
"""Run one dispatcher tick.
Steps:
1. Reclaim stale running tasks.
2. Promote todo -> ready where all parents are done.
3. For each ready task with an assignee, atomically claim and call
``spawn_fn(task, workspace_path)``.
1. Reclaim stale running tasks (TTL expired).
2. Reclaim crashed running tasks (host-local PID no longer alive).
3. Promote todo -> ready where all parents are done.
4. For each ready task with an assignee, atomically claim and call
``spawn_fn(task, workspace_path) -> Optional[int]``. The return
value (if any) is recorded as ``worker_pid`` so subsequent ticks
can detect crashes before the TTL expires.
``spawn_fn`` defaults to ``_default_spawn`` which invokes
``hermes -p <profile> chat -q "..."`` in the background. Tests pass
a stub.
Spawn failures are counted per-task. After ``failure_limit`` consecutive
failures the task is auto-blocked with the last error as its reason —
prevents the dispatcher from thrashing forever on an unfixable task.
``spawn_fn`` defaults to ``_default_spawn``. Tests pass a stub.
"""
result = DispatchResult()
result.reclaimed = release_stale_claims(conn)
result.crashed = detect_crashed_workers(conn)
result.promoted = recompute_ready(conn)
ready_rows = conn.execute(
@@ -950,35 +1167,66 @@ def dispatch_once(
claimed = claim_task(conn, row["id"], ttl_seconds=ttl_seconds)
if claimed is None:
continue
workspace = resolve_workspace(claimed)
try:
workspace = resolve_workspace(claimed)
except Exception as exc:
auto = _record_spawn_failure(
conn, claimed.id, f"workspace: {exc}",
failure_limit=failure_limit,
)
if auto:
result.auto_blocked.append(claimed.id)
continue
# Persist the resolved workspace path so the worker can cd there.
set_workspace_path(conn, claimed.id, str(workspace))
if spawn_fn is None:
spawn_fn = _default_spawn
_spawn = spawn_fn if spawn_fn is not None else _default_spawn
try:
spawn_fn(claimed, str(workspace))
pid = _spawn(claimed, str(workspace))
if pid:
_set_worker_pid(conn, claimed.id, int(pid))
_clear_spawn_failures(conn, claimed.id)
result.spawned.append((claimed.id, claimed.assignee or "", str(workspace)))
spawned += 1
except Exception as exc:
# Spawn failed: release the claim so the next tick can retry.
with write_txn(conn):
conn.execute(
"UPDATE tasks SET status = 'ready', claim_lock = NULL, "
"claim_expires = NULL WHERE id = ? AND status = 'running'",
(claimed.id,),
)
_append_event(
conn, claimed.id, "spawn_failed",
{"error": str(exc)[:500]},
)
auto = _record_spawn_failure(
conn, claimed.id, str(exc),
failure_limit=failure_limit,
)
if auto:
result.auto_blocked.append(claimed.id)
return result
def _default_spawn(task: Task, workspace: str) -> None:
def _rotate_worker_log(log_path: Path, max_bytes: int) -> None:
"""Rotate ``<log>`` to ``<log>.1`` if it exceeds ``max_bytes``.
Single-generation rotation — one old file kept, newer one replaces it.
Keeps disk usage bounded while still giving the user a chance to grab
the prior run's output.
"""
try:
if not log_path.exists():
return
if log_path.stat().st_size <= max_bytes:
return
rotated = log_path.with_suffix(log_path.suffix + ".1")
try:
if rotated.exists():
rotated.unlink()
except OSError:
pass
log_path.rename(rotated)
except OSError:
pass
def _default_spawn(task: Task, workspace: str) -> Optional[int]:
"""Fire-and-forget ``hermes -p <profile> chat -q ...`` subprocess.
We don't wait for the child; its completion is observed by polling
the board ``complete``/``block`` transitions that the worker writes.
Returns the spawned child's PID so the dispatcher can detect crashes
before the claim TTL expires. The child's completion is still observed
via the ``complete`` / ``block`` transitions the worker writes itself;
the PID check is a safety net for crashes, OOM kills, and Ctrl+C.
"""
import subprocess
if not task.assignee:
@@ -997,17 +1245,17 @@ def _default_spawn(task: Task, workspace: str) -> None:
"chat",
"-q", prompt,
]
# Use Popen with DEVNULL stdin so the child doesn't inherit our tty.
# Redirect output to a per-task log under HERMES_HOME/kanban/logs/.
from hermes_constants import get_hermes_home
log_dir = get_hermes_home() / "kanban" / "logs"
log_dir.mkdir(parents=True, exist_ok=True)
log_path = log_dir / f"{task.id}.log"
_rotate_worker_log(log_path, DEFAULT_LOG_ROTATE_BYTES)
# Use 'a' so a re-run on unblock appends rather than overwrites.
log_f = open(log_path, "ab")
try:
subprocess.Popen( # noqa: S603 -- argv is a fixed list built above
proc = subprocess.Popen( # noqa: S603 -- argv is a fixed list built above
cmd,
cwd=workspace if os.path.isdir(workspace) else None,
stdin=subprocess.DEVNULL,
@@ -1027,6 +1275,66 @@ def _default_spawn(task: Task, workspace: str) -> None:
# handle is kept alive by the child's inheritance. The parent's
# reference goes out of scope and is GC'd, but the OS-level FD stays
# open in the child until the child exits.
return proc.pid
# ---------------------------------------------------------------------------
# Long-lived dispatcher daemon
# ---------------------------------------------------------------------------
def run_daemon(
*,
interval: float = 60.0,
max_spawn: Optional[int] = None,
failure_limit: int = DEFAULT_SPAWN_FAILURE_LIMIT,
stop_event=None,
on_tick=None,
) -> None:
"""Run the dispatcher in a loop until interrupted.
Calls :func:`dispatch_once` every ``interval`` seconds. Exits cleanly
on SIGINT / SIGTERM so ``hermes kanban daemon`` is systemd-friendly.
``stop_event`` (a :class:`threading.Event`) and ``on_tick`` (a
callable receiving the :class:`DispatchResult`) are test hooks.
"""
import signal
import threading
if stop_event is None:
stop_event = threading.Event()
def _handle(_signum, _frame):
stop_event.set()
# Install handlers only when running on the main thread — tests call
# this inline from worker threads and signal() would raise there.
if threading.current_thread() is threading.main_thread():
for sig_name in ("SIGINT", "SIGTERM"):
sig = getattr(signal, sig_name, None)
if sig is not None:
try:
signal.signal(sig, _handle)
except (ValueError, OSError):
pass
while not stop_event.is_set():
try:
with contextlib.closing(connect()) as conn:
res = dispatch_once(
conn,
max_spawn=max_spawn,
failure_limit=failure_limit,
)
if on_tick is not None:
try:
on_tick(res)
except Exception:
pass
except Exception:
# Don't let any single tick kill the daemon.
import traceback
traceback.print_exc()
stop_event.wait(timeout=interval)
# ---------------------------------------------------------------------------
@@ -1079,3 +1387,266 @@ def build_worker_context(conn: sqlite3.Connection, task_id: str) -> str:
lines.append("")
return "\n".join(lines).rstrip() + "\n"
# ---------------------------------------------------------------------------
# Stats + SLA helpers
# ---------------------------------------------------------------------------
def board_stats(conn: sqlite3.Connection) -> dict:
"""Per-status + per-assignee counts, plus the oldest ``ready`` age in
seconds (the clearest staleness signal for a router or HUD).
"""
by_status: dict[str, int] = {}
for row in conn.execute(
"SELECT status, COUNT(*) AS n FROM tasks "
"WHERE status != 'archived' GROUP BY status"
):
by_status[row["status"]] = int(row["n"])
by_assignee: dict[str, dict[str, int]] = {}
for row in conn.execute(
"SELECT assignee, status, COUNT(*) AS n FROM tasks "
"WHERE status != 'archived' AND assignee IS NOT NULL "
"GROUP BY assignee, status"
):
by_assignee.setdefault(row["assignee"], {})[row["status"]] = int(row["n"])
oldest_row = conn.execute(
"SELECT MIN(created_at) AS ts FROM tasks WHERE status = 'ready'"
).fetchone()
now = int(time.time())
oldest_ready_age = (
(now - int(oldest_row["ts"]))
if oldest_row and oldest_row["ts"] is not None else None
)
return {
"by_status": by_status,
"by_assignee": by_assignee,
"oldest_ready_age_seconds": oldest_ready_age,
"now": now,
}
def task_age(task: Task) -> dict:
"""Return age metrics for a single task. All values are seconds or None."""
now = int(time.time())
age_since_created = now - int(task.created_at) if task.created_at else None
age_since_started = (
now - int(task.started_at) if task.started_at else None
)
time_to_complete = (
int(task.completed_at) - int(task.started_at or task.created_at)
if task.completed_at else None
)
return {
"created_age_seconds": age_since_created,
"started_age_seconds": age_since_started,
"time_to_complete_seconds": time_to_complete,
}
# ---------------------------------------------------------------------------
# Notification subscriptions (used by the gateway kanban-notifier)
# ---------------------------------------------------------------------------
def add_notify_sub(
conn: sqlite3.Connection,
*,
task_id: str,
platform: str,
chat_id: str,
thread_id: Optional[str] = None,
user_id: Optional[str] = None,
) -> None:
"""Register a gateway source that wants terminal-state notifications
for ``task_id``. Idempotent on (task, platform, chat, thread)."""
now = int(time.time())
with write_txn(conn):
conn.execute(
"""
INSERT OR IGNORE INTO kanban_notify_subs
(task_id, platform, chat_id, thread_id, user_id, created_at)
VALUES (?, ?, ?, ?, ?, ?)
""",
(task_id, platform, chat_id, thread_id or "", user_id, now),
)
def list_notify_subs(
conn: sqlite3.Connection, task_id: Optional[str] = None,
) -> list[dict]:
if task_id is not None:
rows = conn.execute(
"SELECT * FROM kanban_notify_subs WHERE task_id = ?", (task_id,),
).fetchall()
else:
rows = conn.execute("SELECT * FROM kanban_notify_subs").fetchall()
return [dict(r) for r in rows]
def remove_notify_sub(
conn: sqlite3.Connection,
*,
task_id: str,
platform: str,
chat_id: str,
thread_id: Optional[str] = None,
) -> bool:
with write_txn(conn):
cur = conn.execute(
"DELETE FROM kanban_notify_subs WHERE task_id = ? "
"AND platform = ? AND chat_id = ? AND thread_id = ?",
(task_id, platform, chat_id, thread_id or ""),
)
return cur.rowcount > 0
def unseen_events_for_sub(
conn: sqlite3.Connection,
*,
task_id: str,
platform: str,
chat_id: str,
thread_id: Optional[str] = None,
kinds: Optional[Iterable[str]] = None,
) -> tuple[int, list[Event]]:
"""Return ``(new_cursor, events)`` for a given subscription.
Only events with ``id > last_event_id`` are returned. The subscription's
cursor is NOT advanced here; call :func:`advance_notify_cursor` after
the gateway has successfully delivered the notifications.
"""
row = conn.execute(
"SELECT last_event_id FROM kanban_notify_subs "
"WHERE task_id = ? AND platform = ? AND chat_id = ? AND thread_id = ?",
(task_id, platform, chat_id, thread_id or ""),
).fetchone()
if row is None:
return 0, []
cursor = int(row["last_event_id"])
kind_list = list(kinds) if kinds else None
q = (
"SELECT * FROM task_events WHERE task_id = ? AND id > ? "
+ ("AND kind IN (" + ",".join("?" * len(kind_list)) + ") " if kind_list else "")
+ "ORDER BY id ASC"
)
params: list[Any] = [task_id, cursor]
if kind_list:
params.extend(kind_list)
rows = conn.execute(q, params).fetchall()
out: list[Event] = []
max_id = cursor
for r in rows:
try:
payload = json.loads(r["payload"]) if r["payload"] else None
except Exception:
payload = None
out.append(Event(
id=r["id"], task_id=r["task_id"], kind=r["kind"],
payload=payload, created_at=r["created_at"],
))
max_id = max(max_id, int(r["id"]))
return max_id, out
def advance_notify_cursor(
conn: sqlite3.Connection,
*,
task_id: str,
platform: str,
chat_id: str,
thread_id: Optional[str] = None,
new_cursor: int,
) -> None:
with write_txn(conn):
conn.execute(
"UPDATE kanban_notify_subs SET last_event_id = ? "
"WHERE task_id = ? AND platform = ? AND chat_id = ? AND thread_id = ?",
(int(new_cursor), task_id, platform, chat_id, thread_id or ""),
)
# ---------------------------------------------------------------------------
# Retention + garbage collection
# ---------------------------------------------------------------------------
def gc_events(
conn: sqlite3.Connection, *, older_than_seconds: int = 30 * 24 * 3600,
) -> int:
"""Delete task_events rows older than ``older_than_seconds`` for tasks
in a terminal state (``done`` or ``archived``). Returns the number of
rows deleted. Running / ready / blocked tasks keep their full event
history."""
cutoff = int(time.time()) - int(older_than_seconds)
with write_txn(conn):
cur = conn.execute(
"DELETE FROM task_events WHERE created_at < ? AND task_id IN "
"(SELECT id FROM tasks WHERE status IN ('done', 'archived'))",
(cutoff,),
)
return int(cur.rowcount or 0)
def gc_worker_logs(
*, older_than_seconds: int = 30 * 24 * 3600,
) -> int:
"""Delete worker log files older than ``older_than_seconds``. Returns
the number of files removed. Kept separate from ``gc_events`` because
log files live on disk, not in SQLite."""
from hermes_constants import get_hermes_home
log_dir = get_hermes_home() / "kanban" / "logs"
if not log_dir.exists():
return 0
cutoff = time.time() - older_than_seconds
removed = 0
for p in log_dir.iterdir():
try:
if p.is_file() and p.stat().st_mtime < cutoff:
p.unlink()
removed += 1
except OSError:
continue
return removed
# ---------------------------------------------------------------------------
# Worker log accessor
# ---------------------------------------------------------------------------
def worker_log_path(task_id: str) -> Path:
"""Return the path to a worker's log file. The file may not exist
(task never spawned, or log already GC'd)."""
from hermes_constants import get_hermes_home
return get_hermes_home() / "kanban" / "logs" / f"{task_id}.log"
def read_worker_log(
task_id: str, *, tail_bytes: Optional[int] = None,
) -> Optional[str]:
"""Read the worker log for ``task_id``. Returns None if the file
doesn't exist. If ``tail_bytes`` is set, only the last N bytes are
returned (useful for the dashboard drawer which shouldn't page megabytes)."""
path = worker_log_path(task_id)
if not path.exists():
return None
try:
if tail_bytes is None:
return path.read_text(encoding="utf-8", errors="replace")
size = path.stat().st_size
with open(path, "rb") as f:
if size > tail_bytes:
f.seek(size - tail_bytes)
# Skip a partial line if we tailed mid-line. But if the
# window has no newline at all (one giant log line),
# readline() would eat everything — in that case don't
# skip and return the raw tail.
probe = f.tell()
partial = f.readline()
if not partial.endswith(b"\n") and f.tell() >= size:
f.seek(probe)
data = f.read()
return data.decode("utf-8", errors="replace")
except OSError:
return None

70
plugins/kanban/dashboard/dist/index.js vendored
View File

@@ -777,6 +777,27 @@
// Card
// -------------------------------------------------------------------------
// Staleness tiers — amber after a grace window, red when clearly stuck.
// Values below are seconds.
const STALENESS = {
ready: { amber: 1 * 60 * 60, red: 24 * 60 * 60 },
running: { amber: 10 * 60, red: 60 * 60 },
blocked: { amber: 1 * 60 * 60, red: 24 * 60 * 60 },
todo: { amber: 7 * 24 * 60 * 60, red: 30 * 24 * 60 * 60 },
};
function stalenessClass(task) {
if (!task || !task.age) return "";
const age = task.status === "running"
? task.age.started_age_seconds
: task.age.created_age_seconds;
const tier = STALENESS[task.status];
if (!tier || age == null) return "";
if (age >= tier.red) return "hermes-kanban-card--stale-red";
if (age >= tier.amber) return "hermes-kanban-card--stale-amber";
return "";
}
function TaskCard(props) {
const t = props.task;
const cardRef = useRef(null);
@@ -811,6 +832,7 @@
className: cn(
"hermes-kanban-card",
props.selected ? "hermes-kanban-card--selected" : "",
stalenessClass(t),
),
draggable: true,
onDragStart: handleDragStart,
@@ -1148,6 +1170,54 @@
);
}),
),
h(WorkerLogSection, { taskId: t.id }),
);
}
// Worker log: loads lazily (one GET on mount), refresh button, tail cap.
function WorkerLogSection(props) {
const [state, setState] = useState({ loading: false, data: null, err: null });
const load = useCallback(function () {
setState({ loading: true, data: null, err: null });
SDK.fetchJSON(`${API}/tasks/${encodeURIComponent(props.taskId)}/log?tail=100000`)
.then(function (d) { setState({ loading: false, data: d, err: null }); })
.catch(function (e) { setState({ loading: false, data: null, err: String(e.message || e) }); });
}, [props.taskId]);
// Auto-load when the section mounts; the user opened the drawer so the
// cost is one small HTTP round-trip.
useEffect(function () { load(); }, [load]);
const data = state.data;
let body;
if (state.loading) {
body = h("div", { className: "text-xs text-muted-foreground" }, "Loading log…");
} else if (state.err) {
body = h("div", { className: "text-xs text-destructive" }, state.err);
} else if (!data || !data.exists) {
body = h("div", { className: "text-xs text-muted-foreground italic" },
"— no worker log yet (task hasn't spawned or log was rotated away) —");
} else {
body = h("pre", { className: "hermes-kanban-pre hermes-kanban-log" },
data.content || "(empty)");
}
return h("div", { className: "hermes-kanban-section" },
h("div", { className: "hermes-kanban-section-head-row" },
h("span", { className: "hermes-kanban-section-head" },
"Worker log" + (data && data.size_bytes ? ` (${data.size_bytes} B)` : "")),
h("button", {
type: "button",
onClick: load,
className: "hermes-kanban-edit-link",
title: "Refresh log",
}, "refresh"),
),
body,
data && data.truncated
? h("div", { className: "text-xs text-muted-foreground" },
"(showing last 100 KB — full log at ", data.path, ")")
: null,
);
}

28
plugins/kanban/dashboard/dist/style.css vendored
View File

@@ -654,3 +654,31 @@
transform: scale(1.02);
transition: none;
}
/* ---- Staleness tiers ------------------------------------------------ */
.hermes-kanban-card--stale-amber :where(.hermes-kanban-card-content) {
box-shadow: 0 0 0 1px #d4b34888 inset;
}
.hermes-kanban-card--stale-amber:hover :where(.hermes-kanban-card-content) {
box-shadow: 0 0 0 2px #d4b348 inset;
}
.hermes-kanban-card--stale-red :where(.hermes-kanban-card-content) {
box-shadow: 0 0 0 1px var(--color-destructive, #d14a4a) inset,
0 0 8px color-mix(in srgb, var(--color-destructive, #d14a4a) 30%, transparent);
}
.hermes-kanban-card--stale-red:hover :where(.hermes-kanban-card-content) {
box-shadow: 0 0 0 2px var(--color-destructive, #d14a4a) inset,
0 0 10px color-mix(in srgb, var(--color-destructive, #d14a4a) 45%, transparent);
}
/* ---- Worker log pane ------------------------------------------------ */
.hermes-kanban-log {
max-height: 340px;
overflow: auto;
white-space: pre;
font-size: 0.7rem;
line-height: 1.45;
}

59
plugins/kanban/dashboard/plugin_api.py
View File

@@ -100,6 +100,9 @@ BOARD_COLUMNS: list[str] = [
def _task_dict(task: kanban_db.Task) -> dict[str, Any]:
d = asdict(task)
# Add derived age metrics so the UI can colour stale cards without
# computing deltas client-side.
d["age"] = kanban_db.task_age(task)
# Keep body short on list endpoints; full body comes from /tasks/:id.
return d
@@ -278,6 +281,7 @@ class CreateTaskBody(BaseModel):
workspace_path: Optional[str] = None
parents: list[str] = Field(default_factory=list)
triage: bool = False
idempotency_key: Optional[str] = None
@router.post("/tasks")
@@ -296,6 +300,7 @@ def create_task(payload: CreateTaskBody):
priority=payload.priority,
parents=payload.parents,
triage=payload.triage,
idempotency_key=payload.idempotency_key,
)
task = kanban_db.get_task(conn, task_id)
return {"task": _task_dict(task) if task else None}
@@ -603,6 +608,60 @@ def get_config():
}
# ---------------------------------------------------------------------------
# Stats (per-profile / per-status counts + oldest-ready age)
# ---------------------------------------------------------------------------
@router.get("/stats")
def get_stats():
"""Per-status + per-assignee counts + oldest-ready age.
Designed for the dashboard HUD and for router profiles that need to
answer "is this specialist overloaded?" without scanning the whole
board themselves.
"""
conn = _conn()
try:
return kanban_db.board_stats(conn)
finally:
conn.close()
# ---------------------------------------------------------------------------
# Worker log (read-only; file written by _default_spawn)
# ---------------------------------------------------------------------------
@router.get("/tasks/{task_id}/log")
def get_task_log(task_id: str, tail: Optional[int] = Query(None, ge=1, le=2_000_000)):
"""Return the worker's stdout/stderr log.
``tail`` caps the response size (bytes) so the dashboard drawer
doesn't paginate megabytes into the browser. Returns 404 if the task
has never spawned. The on-disk log is rotated at 2 MiB per
``_rotate_worker_log`` — a single ``.log.1`` is kept, no further
generations, so disk usage per task is bounded at ~4 MiB.
"""
conn = _conn()
try:
task = kanban_db.get_task(conn, task_id)
finally:
conn.close()
if task is None:
raise HTTPException(status_code=404, detail=f"task {task_id} not found")
content = kanban_db.read_worker_log(task_id, tail_bytes=tail)
log_path = kanban_db.worker_log_path(task_id)
size = log_path.stat().st_size if log_path.exists() else 0
return {
"task_id": task_id,
"path": str(log_path),
"exists": content is not None,
"size_bytes": size,
"content": content or "",
# Truncated when the on-disk file was larger than the tail cap.
"truncated": bool(tail and size > tail),
}
# ---------------------------------------------------------------------------
# Dispatch nudge (optional quick-path so the UI doesn't wait 60 s)
# ---------------------------------------------------------------------------

17
plugins/kanban/systemd/hermes-kanban-dispatcher.service Normal file
View File

@@ -0,0 +1,17 @@
[Unit]
Description=Hermes Kanban dispatcher (hermes kanban daemon)
Documentation=https://hermes-agent.nousresearch.com/docs/user-guide/features/kanban
After=network.target
[Service]
Type=simple
ExecStart=/usr/bin/env hermes kanban daemon --interval 60 --pidfile %t/hermes-kanban-dispatcher.pid
Restart=on-failure
RestartSec=5
# Log to the journal via stdout/stderr; the dispatcher also writes per-task
# worker output to $HERMES_HOME/kanban/logs/<task>.log.
StandardOutput=journal
StandardError=journal
[Install]
WantedBy=default.target

612
tests/hermes_cli/test_kanban_core_functionality.py Normal file
View File

@@ -0,0 +1,612 @@
"""Core-functionality tests for the kanban kernel + CLI additions.
Complements tests/hermes_cli/test_kanban_db.py (schema + CAS atomicity)
and tests/hermes_cli/test_kanban_cli.py (end-to-end run_slash). The
tests here exercise the pieces added as part of the kanban hardening
pass: circuit breaker, crash detection, daemon loop, idempotency,
retention/gc, stats, notify subscriptions, worker log accessor, run_slash
parity across every registered verb.
"""
from __future__ import annotations
import json
import os
import threading
import time
from pathlib import Path
from typing import Optional
import pytest
from hermes_cli import kanban_db as kb
from hermes_cli.kanban import run_slash
# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------
@pytest.fixture
def kanban_home(tmp_path, monkeypatch):
home = tmp_path / ".hermes"
home.mkdir()
monkeypatch.setenv("HERMES_HOME", str(home))
monkeypatch.setattr(Path, "home", lambda: tmp_path)
kb.init_db()
return home
# ---------------------------------------------------------------------------
# Idempotency key
# ---------------------------------------------------------------------------
def test_idempotency_key_returns_existing_task(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="first", idempotency_key="abc")
b = kb.create_task(conn, title="second attempt", idempotency_key="abc")
assert a == b, "same idempotency_key should return the same task id"
# And body wasn't overwritten — first create wins.
task = kb.get_task(conn, a)
assert task.title == "first"
finally:
conn.close()
def test_idempotency_key_ignored_for_archived(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="first", idempotency_key="abc")
kb.archive_task(conn, a)
b = kb.create_task(conn, title="second", idempotency_key="abc")
assert a != b, "archived task shouldn't block a fresh create with same key"
finally:
conn.close()
def test_no_idempotency_key_never_collides(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="a")
b = kb.create_task(conn, title="b")
assert a != b
finally:
conn.close()
# ---------------------------------------------------------------------------
# Spawn-failure circuit breaker
# ---------------------------------------------------------------------------
def test_spawn_failure_auto_blocks_after_limit(kanban_home):
"""N consecutive spawn failures on the same task → auto_blocked."""
def _bad_spawn(task, ws):
raise RuntimeError("no PATH")
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x", assignee="worker")
# Three ticks below the default limit (5) → still ready, counter grows.
for i in range(3):
res = kb.dispatch_once(conn, spawn_fn=_bad_spawn, failure_limit=5)
assert tid not in res.auto_blocked
task = kb.get_task(conn, tid)
assert task.status == "ready"
assert task.spawn_failures == 3
# Two more ticks → fifth failure exceeds the limit.
res1 = kb.dispatch_once(conn, spawn_fn=_bad_spawn, failure_limit=5)
assert tid not in res1.auto_blocked
res2 = kb.dispatch_once(conn, spawn_fn=_bad_spawn, failure_limit=5)
assert tid in res2.auto_blocked
task = kb.get_task(conn, tid)
assert task.status == "blocked"
assert task.spawn_failures >= 5
assert task.last_spawn_error and "no PATH" in task.last_spawn_error
finally:
conn.close()
def test_successful_spawn_resets_failure_counter(kanban_home):
"""A successful spawn clears the counter so past failures don't count
against future retries of the same task."""
calls = [0]
def _flaky_spawn(task, ws):
calls[0] += 1
if calls[0] <= 2:
raise RuntimeError("transient")
return 99999 # pid value — harmless; crash detection will clear it
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x", assignee="worker")
# Two failures + one success.
kb.dispatch_once(conn, spawn_fn=_flaky_spawn, failure_limit=5)
kb.dispatch_once(conn, spawn_fn=_flaky_spawn, failure_limit=5)
task = kb.get_task(conn, tid)
assert task.spawn_failures == 2
kb.dispatch_once(conn, spawn_fn=_flaky_spawn, failure_limit=5)
task = kb.get_task(conn, tid)
assert task.spawn_failures == 0
assert task.last_spawn_error is None
# Task is now running with a pid.
assert task.status == "running"
assert task.worker_pid == 99999
finally:
conn.close()
def test_workspace_resolution_failure_also_counts(kanban_home):
"""`dir:` workspace with no path should fail workspace resolution AND
count against the failure budget — not just crash the tick."""
conn = kb.connect()
try:
# Manually insert a broken task: dir workspace but workspace_path is NULL
# after initial create. We achieve this by creating via kanban_db then
# UPDATE-ing workspace_path to NULL.
tid = kb.create_task(
conn, title="x", assignee="worker",
workspace_kind="dir", workspace_path="/tmp/kanban_e2e_dir",
)
with kb.write_txn(conn):
conn.execute(
"UPDATE tasks SET workspace_path = NULL WHERE id = ?", (tid,),
)
res = kb.dispatch_once(conn, failure_limit=3)
task = kb.get_task(conn, tid)
assert task.spawn_failures == 1
assert task.status == "ready"
assert task.last_spawn_error and "workspace" in task.last_spawn_error
# Run twice more → auto-blocked.
kb.dispatch_once(conn, failure_limit=3)
res = kb.dispatch_once(conn, failure_limit=3)
assert tid in res.auto_blocked
task = kb.get_task(conn, tid)
assert task.status == "blocked"
finally:
conn.close()
# ---------------------------------------------------------------------------
# Worker aliveness / crash detection
# ---------------------------------------------------------------------------
def test_pid_alive_helper():
# Our own pid is alive.
assert kb._pid_alive(os.getpid())
# PID 0 / None / negative.
assert not kb._pid_alive(0)
assert not kb._pid_alive(None)
# A clearly-dead pid (very large, extremely unlikely to exist).
assert not kb._pid_alive(2 ** 30)
def test_detect_crashed_workers_reclaims(kanban_home):
"""A running task whose pid vanished gets dropped to ready with a
``crashed`` event, independent of the claim TTL."""
def _spawn_pid_that_exits(task, ws):
# Spawn a real child that exits instantly.
import subprocess
p = subprocess.Popen(
["python3", "-c", "pass"], stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL, stdin=subprocess.DEVNULL,
)
p.wait()
return p.pid
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x", assignee="worker")
res = kb.dispatch_once(conn, spawn_fn=_spawn_pid_that_exits)
# Brief sleep to make sure the child's pid has been reaped; on
# busy CI the pid may be reused by another process, which would
# fool _pid_alive. If that happens we accept the test still
# passing as long as the dispatcher ran without error.
time.sleep(0.2)
res2 = kb.dispatch_once(conn)
task = kb.get_task(conn, tid)
# Either crashed was detected (preferred) or the TTL reclaim path
# will eventually fire; we accept either outcome but the worker_pid
# should no longer be set.
if res2.crashed:
assert tid in res2.crashed
events = kb.list_events(conn, tid)
assert any(e.kind == "crashed" for e in events)
finally:
conn.close()
# ---------------------------------------------------------------------------
# Daemon loop
# ---------------------------------------------------------------------------
def test_daemon_runs_and_stops(kanban_home):
"""run_daemon should execute at least one tick and exit cleanly on
stop_event."""
ticks = []
stop = threading.Event()
def _runner():
kb.run_daemon(
interval=0.05,
stop_event=stop,
on_tick=lambda res: ticks.append(res),
)
t = threading.Thread(target=_runner, daemon=True)
t.start()
# Give it a few ticks.
time.sleep(0.3)
stop.set()
t.join(timeout=2.0)
assert not t.is_alive(), "daemon should exit on stop_event"
assert len(ticks) >= 1, "expected at least one tick"
def test_daemon_keeps_going_after_tick_exception(kanban_home, monkeypatch):
"""A tick that raises shouldn't kill the loop."""
calls = [0]
orig_dispatch = kb.dispatch_once
def _boom(conn, **kw):
calls[0] += 1
if calls[0] == 1:
raise RuntimeError("simulated tick failure")
return orig_dispatch(conn, **kw)
monkeypatch.setattr(kb, "dispatch_once", _boom)
stop = threading.Event()
def _runner():
kb.run_daemon(interval=0.05, stop_event=stop)
t = threading.Thread(target=_runner, daemon=True)
t.start()
time.sleep(0.3)
stop.set()
t.join(timeout=2.0)
# At minimum, second-tick+ should have run.
assert calls[0] >= 2
# ---------------------------------------------------------------------------
# Stats + age
# ---------------------------------------------------------------------------
def test_board_stats(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="a", assignee="x")
b = kb.create_task(conn, title="b", assignee="y")
kb.complete_task(conn, a, result="done")
stats = kb.board_stats(conn)
assert stats["by_status"]["ready"] == 1
assert stats["by_status"]["done"] == 1
assert stats["by_assignee"]["x"]["done"] == 1
assert stats["by_assignee"]["y"]["ready"] == 1
assert stats["oldest_ready_age_seconds"] is not None
finally:
conn.close()
def test_task_age_helper(kanban_home):
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x")
task = kb.get_task(conn, tid)
age = kb.task_age(task)
assert age["created_age_seconds"] is not None
assert age["started_age_seconds"] is None
assert age["time_to_complete_seconds"] is None
finally:
conn.close()
# ---------------------------------------------------------------------------
# Notify subscriptions
# ---------------------------------------------------------------------------
def test_notify_sub_crud(kanban_home):
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x")
kb.add_notify_sub(
conn, task_id=tid, platform="telegram", chat_id="123", user_id="u1",
)
subs = kb.list_notify_subs(conn, tid)
assert len(subs) == 1
assert subs[0]["platform"] == "telegram"
# Duplicate add is a no-op.
kb.add_notify_sub(
conn, task_id=tid, platform="telegram", chat_id="123",
)
assert len(kb.list_notify_subs(conn, tid)) == 1
# Distinct thread is a new row.
kb.add_notify_sub(
conn, task_id=tid, platform="telegram", chat_id="123",
thread_id="5",
)
assert len(kb.list_notify_subs(conn, tid)) == 2
# Remove one.
ok = kb.remove_notify_sub(
conn, task_id=tid, platform="telegram", chat_id="123",
)
assert ok is True
assert len(kb.list_notify_subs(conn, tid)) == 1
finally:
conn.close()
def test_notify_cursor_advances(kanban_home):
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x", assignee="w")
kb.add_notify_sub(conn, task_id=tid, platform="telegram", chat_id="123")
# Initial: one "created" event but we only want terminal kinds.
cursor, events = kb.unseen_events_for_sub(
conn, task_id=tid, platform="telegram", chat_id="123",
kinds=["completed", "blocked"],
)
assert events == []
# Complete the task → new `completed` event.
kb.complete_task(conn, tid, result="ok")
cursor, events = kb.unseen_events_for_sub(
conn, task_id=tid, platform="telegram", chat_id="123",
kinds=["completed", "blocked"],
)
assert len(events) == 1
assert events[0].kind == "completed"
# Advance cursor — next call returns empty.
kb.advance_notify_cursor(
conn, task_id=tid, platform="telegram", chat_id="123",
new_cursor=cursor,
)
_, events2 = kb.unseen_events_for_sub(
conn, task_id=tid, platform="telegram", chat_id="123",
kinds=["completed", "blocked"],
)
assert events2 == []
finally:
conn.close()
# ---------------------------------------------------------------------------
# GC + retention
# ---------------------------------------------------------------------------
def test_gc_events_keeps_active_task_history(kanban_home):
"""gc_events should only prune rows for terminal (done/archived) tasks."""
conn = kb.connect()
try:
alive = kb.create_task(conn, title="a", assignee="w")
done_id = kb.create_task(conn, title="b", assignee="w")
kb.complete_task(conn, done_id)
# Force all existing events to "old" by bumping created_at backwards.
with kb.write_txn(conn):
conn.execute(
"UPDATE task_events SET created_at = ?",
(int(time.time()) - 60 * 24 * 3600,),
)
removed = kb.gc_events(conn, older_than_seconds=30 * 24 * 3600)
# At least the done task's "created" + "completed" events gone.
assert removed >= 2
# Alive task's events survive.
alive_events = kb.list_events(conn, alive)
assert len(alive_events) >= 1
finally:
conn.close()
def test_gc_worker_logs_deletes_old_files(kanban_home):
log_dir = kanban_home / "kanban" / "logs"
log_dir.mkdir(parents=True, exist_ok=True)
old = log_dir / "old.log"
young = log_dir / "young.log"
old.write_text("stale")
young.write_text("fresh")
# Age the old file by 100 days.
past = time.time() - 100 * 24 * 3600
os.utime(old, (past, past))
removed = kb.gc_worker_logs(older_than_seconds=30 * 24 * 3600)
assert removed == 1
assert not old.exists()
assert young.exists()
# ---------------------------------------------------------------------------
# Log rotation + accessor
# ---------------------------------------------------------------------------
def test_worker_log_rotation_keeps_one_generation(kanban_home, tmp_path):
log_dir = kanban_home / "kanban" / "logs"
log_dir.mkdir(parents=True, exist_ok=True)
target = log_dir / "t_aaaa.log"
target.write_bytes(b"x" * (3 * 1024 * 1024)) # 3 MiB, over 2 MiB threshold
kb._rotate_worker_log(target, kb.DEFAULT_LOG_ROTATE_BYTES)
assert not target.exists()
assert (log_dir / "t_aaaa.log.1").exists()
def test_read_worker_log_tail(kanban_home):
log_dir = kanban_home / "kanban" / "logs"
log_dir.mkdir(parents=True, exist_ok=True)
p = log_dir / "t_beef.log"
# 10 lines
p.write_text("\n".join(f"line {i}" for i in range(10)))
full = kb.read_worker_log("t_beef")
assert full is not None and "line 0" in full
tail = kb.read_worker_log("t_beef", tail_bytes=30)
assert tail is not None
# Tail should not include line 0.
assert "line 0" not in tail
# Missing log returns None.
assert kb.read_worker_log("t_missing") is None
# ---------------------------------------------------------------------------
# CLI bulk verbs
# ---------------------------------------------------------------------------
def test_cli_complete_bulk(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="a")
b = kb.create_task(conn, title="b")
c = kb.create_task(conn, title="c")
finally:
conn.close()
out = run_slash(f"complete {a} {b} {c} --result all-done")
assert out.count("Completed") == 3
conn = kb.connect()
try:
for tid in (a, b, c):
assert kb.get_task(conn, tid).status == "done"
finally:
conn.close()
def test_cli_archive_bulk(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="a")
b = kb.create_task(conn, title="b")
finally:
conn.close()
out = run_slash(f"archive {a} {b}")
assert "Archived" in out
conn = kb.connect()
try:
assert kb.get_task(conn, a).status == "archived"
assert kb.get_task(conn, b).status == "archived"
finally:
conn.close()
def test_cli_unblock_bulk(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="a")
b = kb.create_task(conn, title="b")
kb.block_task(conn, a)
kb.block_task(conn, b)
finally:
conn.close()
out = run_slash(f"unblock {a} {b}")
assert out.count("Unblocked") == 2
def test_cli_block_bulk_via_ids_flag(kanban_home):
conn = kb.connect()
try:
a = kb.create_task(conn, title="a")
b = kb.create_task(conn, title="b")
finally:
conn.close()
out = run_slash(f"block {a} need input --ids {b}")
assert out.count("Blocked") == 2
def test_cli_create_with_idempotency_key(kanban_home):
out1 = run_slash("create 'x' --idempotency-key abc --json")
tid1 = json.loads(out1)["id"]
out2 = run_slash("create 'y' --idempotency-key abc --json")
tid2 = json.loads(out2)["id"]
assert tid1 == tid2
# ---------------------------------------------------------------------------
# CLI stats / watch / log / notify / daemon parity
# ---------------------------------------------------------------------------
def test_cli_stats_json(kanban_home):
conn = kb.connect()
try:
kb.create_task(conn, title="a", assignee="r")
finally:
conn.close()
out = run_slash("stats --json")
data = json.loads(out)
assert "by_status" in data
assert "by_assignee" in data
assert "oldest_ready_age_seconds" in data
def test_cli_notify_subscribe_and_list(kanban_home):
tid = run_slash("create 'x' --json")
tid = json.loads(tid)["id"]
out = run_slash(
f"notify-subscribe {tid} --platform telegram --chat-id 999",
)
assert "Subscribed" in out
lst = run_slash("notify-list --json")
subs = json.loads(lst)
assert any(s["task_id"] == tid and s["platform"] == "telegram" for s in subs)
rm = run_slash(
f"notify-unsubscribe {tid} --platform telegram --chat-id 999",
)
assert "Unsubscribed" in rm
def test_cli_log_missing_task(kanban_home):
# No such task → exit-style (no log for...) message on stderr, returned
# in combined output.
out = run_slash("log t_nope")
assert "no log" in out.lower()
def test_cli_gc_reports_counts(kanban_home):
conn = kb.connect()
try:
tid = kb.create_task(conn, title="x")
kb.archive_task(conn, tid)
finally:
conn.close()
out = run_slash("gc")
assert "GC complete" in out
# ---------------------------------------------------------------------------
# run_slash parity — every verb returns a sensible, non-crashy string
# ---------------------------------------------------------------------------
def test_run_slash_every_verb_returns_sensible_output(kanban_home):
"""Smoke-test every verb with minimal args. None may raise, none may
return the empty string (must either succeed or report a usage error)."""
# Set up a pair of tasks to reference.
conn = kb.connect()
try:
tid_a = kb.create_task(conn, title="a")
tid_b = kb.create_task(conn, title="b", parents=[tid_a])
finally:
conn.close()
invocations = [
"", # no subcommand → help text
"--help",
"init",
"create 'smoke'",
"list",
"ls",
f"show {tid_a}",
f"assign {tid_a} researcher",
f"link {tid_a} {tid_b}",
f"unlink {tid_a} {tid_b}",
f"claim {tid_a}",
f"comment {tid_a} hello",
f"complete {tid_a}",
f"block {tid_b} need input",
f"unblock {tid_b}",
f"archive {tid_a}",
"dispatch --dry-run --json",
"stats --json",
"notify-list",
f"log {tid_a}",
f"context {tid_b}",
"gc",
]
for cmd in invocations:
out = run_slash(cmd)
assert out is not None
assert out.strip() != "", f"empty output for `/kanban {cmd}`"

114
website/docs/user-guide/features/kanban.md
View File

@@ -43,14 +43,14 @@ They coexist: a kanban worker may call `delegate_task` internally during its run
## Core concepts
- **Task** — a row with title, optional body, one assignee (a profile name), status (`todo | ready | running | blocked | done | archived`), optional tenant namespace.
- **Task** — a row with title, optional body, one assignee (a profile name), status (`triage | todo | ready | running | blocked | done | archived`), optional tenant namespace, optional idempotency key (dedup for retried automation).
- **Link** — `task_links` row recording a parent → child dependency. The dispatcher promotes `todo → ready` when all parents are `done`.
- **Comment** — the inter-agent protocol. Agents and humans append comments; when a worker is (re-)spawned it reads the full comment thread as part of its context.
- **Workspace** — the directory a worker operates in. Three kinds:
- `scratch` (default) — fresh tmp dir under `~/.hermes/kanban/workspaces/<id>/`.
- `dir:<path>` — an existing shared directory (Obsidian vault, mail ops dir, per-account folder).
- `worktree` — a git worktree under `.worktrees/<id>/` for coding tasks.
- **Dispatcher** — `hermes kanban dispatch` runs a one-shot pass: reclaim stale claims, promote ready tasks, atomically claim, spawn assigned profiles. Runs via cron every 60 seconds.
- **Dispatcher** — a long-lived loop that, every N seconds (default 60): reclaims stale claims, reclaims crashed workers (PID gone but TTL not yet expired), promotes ready tasks, atomically claims, spawns assigned profiles. Runs as `hermes kanban daemon` (foreground) or as a systemd user service. After ~5 consecutive spawn failures on the same task the dispatcher auto-blocks it with the last error as the reason — prevents thrashing on tasks whose profile doesn't exist, workspace can't mount, etc.
- **Tenant** — optional string namespace. One specialist fleet can serve multiple businesses (`--tenant business-a`) with data isolation by workspace path and memory key prefix.
## Quick start
@@ -59,23 +59,58 @@ They coexist: a kanban worker may call `delegate_task` internally during its run
# 1. Create the board
hermes kanban init
# 2. Create a task
# 2. Start the dispatcher (foreground; Ctrl-C to stop)
hermes kanban daemon &
# 3. Create a task
hermes kanban create "research AI funding landscape" --assignee researcher
# 3. List what's on the board
hermes kanban list
# 4. Watch activity live
hermes kanban watch
# 4. Run a dispatcher pass (dry-run to preview, real to spawn workers)
hermes kanban dispatch --dry-run
hermes kanban dispatch
# 5. See the board
hermes kanban list
hermes kanban stats
```
To have the board run continuously, schedule the dispatcher:
### Running the dispatcher as a service
For production, install the systemd user unit shipped at
`plugins/kanban/systemd/hermes-kanban-dispatcher.service`:
```bash
hermes cron add --schedule "*/1 * * * *" \
--name kanban-dispatch \
hermes kanban dispatch
mkdir -p ~/.config/systemd/user
cp plugins/kanban/systemd/hermes-kanban-dispatcher.service \
~/.config/systemd/user/
systemctl --user daemon-reload
systemctl --user enable --now hermes-kanban-dispatcher.service
systemctl --user status hermes-kanban-dispatcher
journalctl --user -u hermes-kanban-dispatcher -f # follow logs
```
Without a running dispatcher `ready` tasks stay where they are — `hermes kanban init` will remind you of this on first run.
### Idempotent create (for automation / webhooks)
```bash
# First call creates the task. Any subsequent call with the same key
# returns the existing task id instead of duplicating.
hermes kanban create "nightly ops review" \
--assignee ops \
--idempotency-key "nightly-ops-$(date -u +%Y-%m-%d)" \
--json
```
### Bulk CLI verbs
All the lifecycle verbs accept multiple ids so you can clean up a batch
in one command:
```bash
hermes kanban complete t_abc t_def t_hij --result "batch wrap"
hermes kanban archive t_abc t_def t_hij
hermes kanban unblock t_abc t_def
hermes kanban block t_abc "need input" --ids t_def t_hij
```
## The worker skill
@@ -223,11 +258,12 @@ The GUI is deliberately thin. Everything the plugin does is reachable from the C
## CLI command reference
```
hermes kanban init # create kanban.db
hermes kanban init # create kanban.db + print daemon hint
hermes kanban create "<title>" [--body ...] [--assignee <profile>]
[--parent <id>]... [--tenant <name>]
[--workspace scratch|worktree|dir:<path>]
[--priority N] [--triage] [--json]
[--priority N] [--triage] [--idempotency-key KEY]
[--json]
hermes kanban list [--mine] [--assignee P] [--status S] [--tenant T] [--archived] [--json]
hermes kanban show <id> [--json]
hermes kanban assign <id> <profile> # or 'none' to unassign
@@ -235,14 +271,30 @@ hermes kanban link <parent_id> <child_id>
hermes kanban unlink <parent_id> <child_id>
hermes kanban claim <id> [--ttl SECONDS]
hermes kanban comment <id> "<text>" [--author NAME]
hermes kanban complete <id> [--result "..."]
hermes kanban block <id> "<reason>"
hermes kanban unblock <id>
hermes kanban archive <id>
hermes kanban tail <id> # follow event stream
hermes kanban dispatch [--dry-run] [--max N] [--json]
# Bulk verbs — accept multiple ids:
hermes kanban complete <id>... [--result "..."]
hermes kanban block <id> "<reason>" [--ids <id>...]
hermes kanban unblock <id>...
hermes kanban archive <id>...
hermes kanban tail <id> # follow a single task's event stream
hermes kanban watch [--assignee P] [--tenant T] # live stream ALL events to the terminal
[--kinds completed,blocked,…] [--interval SECS]
hermes kanban dispatch [--dry-run] [--max N] # one-shot pass
[--failure-limit N] [--json]
hermes kanban daemon [--interval SECS] [--max N] # long-lived loop
[--failure-limit N] [--pidfile PATH] [-v]
hermes kanban stats [--json] # per-status + per-assignee counts
hermes kanban log <id> [--tail BYTES] # worker log from ~/.hermes/kanban/logs/
hermes kanban notify-subscribe <id> # gateway bridge hook (used by /kanban in the gateway)
--platform <name> --chat-id <id> [--thread-id <id>] [--user-id <id>]
hermes kanban notify-list [<id>] [--json]
hermes kanban notify-unsubscribe <id>
--platform <name> --chat-id <id> [--thread-id <id>]
hermes kanban context <id> # what a worker sees
hermes kanban gc # remove scratch dirs of archived tasks
hermes kanban gc [--event-retention-days N] # workspaces + old events + old logs
[--log-retention-days N]
```
All commands are also available as a slash command in the gateway (`/kanban list`, `/kanban comment t_abc "need docs"`, etc.). The slash command bypasses the running-agent guard, so you can `/kanban unblock` a stuck worker while the main agent is still chatting.
@@ -278,6 +330,26 @@ hermes kanban create "monthly report" \
Workers receive `$HERMES_TENANT` and namespace their memory writes by prefix. The board, the dispatcher, and the profile definitions are all shared; only the data is scoped.
## Gateway notifications
When you run `/kanban create …` from the gateway (Telegram, Discord, Slack, etc.), the originating chat is automatically subscribed to the new task. The gateway's background notifier polls `task_events` every few seconds and delivers one message per terminal event (`completed`, `blocked`, `spawn_auto_blocked`, `crashed`) to that chat. Completed tasks also send the first line of the worker's `--result` so you see the outcome without having to `/kanban show`.
You can manage subscriptions explicitly from the CLI — useful when a script / cron job wants to notify a chat it didn't originate from:
```bash
hermes kanban notify-subscribe t_abcd \
--platform telegram --chat-id 12345678 --thread-id 7
hermes kanban notify-list
hermes kanban notify-unsubscribe t_abcd \
--platform telegram --chat-id 12345678 --thread-id 7
```
A subscription removes itself automatically once the task reaches `done` or `archived`; no cleanup needed.
## Out of scope
Kanban is deliberately single-host. `~/.hermes/kanban.db` is a local SQLite file and the dispatcher spawns workers on the same machine. Running a shared board across two hosts is not supported — there's no coordination primitive for "worker X on host A, worker Y on host B," and the crash-detection path assumes PIDs are host-local. If you need multi-host, run an independent board per host and use `delegate_task` / a message queue to bridge them.
## Design spec
The complete design — architecture, concurrency correctness, comparison with other systems, implementation plan, risks, open questions — lives in `docs/hermes-kanban-v1-spec.pdf`. Read that before filing any behavior-change PR.