* feat(orchestrator): persist N-entry FIFO message queue
Replaces the single-slot, latest-wins, in-memory queue with a SQLite-backed
FIFO queue (default cap 10 per session, configurable via
KANDEV_QUEUE_MAX_PER_SESSION). Drain stays one-per-turn so each entry gets its
own user message and `on_turn_*` workflow cycle. Inter-task `message_task_kandev`
returns a structured `queue_full` error with sender attribution when the
target session is saturated, so the calling LLM can decide whether to retry.
Surfaces a new WS action `message.queue.remove` for single-entry deletion;
`message.queue.cancel` now means clear-all. Edit/remove are keyed on the
entry's UUID, returning `entry_not_found` when atomic-take won the drain race.
* feat(web): N-entry queue state, API, and optimistic hook
Replaces the single-slot QueueStatus with an ordered `entries[]` per session
plus capacity meta (`count`, `max`). API exposes typed `QueueFullError` and
`QueueEntryNotFoundError`; the hook surfaces optimistic edit/remove with
drain-race rollback (refetch on `entry_not_found`).
* feat(web): inline ghost-message queue UI with sender chips
Replaces the floating QueuedMessageIndicator overlay with a stack of ghost
messages rendered above the chat input. Each ghost shows a sender chip
(user / agent) and per-entry edit/remove. A small "n/max queued · clear all"
pill summarizes capacity. Inter-task entries are visually distinct and edit
is gated to the original sender.
* fix(queue): address review — auth guard, TOCTOU, error UX
- Add `messagequeue.QueuedByUser` / `QueuedByAgent` constants and centralize
the `queue_full` error code so the WS and MCP handlers stay in sync.
- WS `message.queue.{add,append,update}` default empty user_id to QueuedByUser
so the UpdateContent ownership guard always runs against a non-empty owner;
inter-task entries (`queued_by="agent"`) can no longer be overwritten by
user-initiated edits even when `user_id` is omitted from the payload.
- memoryRepository: hold the mutex through the whole append-or-insert path
(prior split released the lock between tail-check and Insert, allowing two
same-sender callers to race past coalescing). TransferSession now shifts
source positions past the destination's max so transferred entries always
drain after pre-existing destination entries, matching SQLite semantics.
- Frontend: surface edit/clear/remove failures via `sonner` toasts (drain race
→ "message already sent"); exit edit mode on failure instead of leaving the
textarea silently stuck. Hide the remove button on read-only (agent) ghosts.
- `useQueue.clearAll` no longer derives `max` from pre-clear entry count;
resets to `metaMax ?? 0` so the next status_changed event lands authoritative
capacity.
- `senderKindOf` drops the unreachable metadata fallback; route on `queued_by`
alone since `dispatchTaskMessage` always sets it.
- Test loggers now write to stderr per CLAUDE.md "stderr for logs" guideline.
* test(web): align queue e2e selectors with new ghost-message UI
The ghost-message rewrite renamed button titles ("Cancel queued message"
→ "Remove queued message", "Edit message" → "Edit queued message") and
introduced a `data-testid="queued-ghost-list"` container. The
`message-queue.spec.ts` Playwright tests still pointed at the old titles.
* fix(queue): address second review pass — auth, drain race, tests
- WS handlers (`add` / `append` / `update`) now reject `user_id="agent"`
outright, closing the gap a hostile WS client could exploit by
impersonating the inter-task sender identity to overwrite agent
entries (greptile P1).
- WS `update` / `remove` now require `session_id` so the post-mutation
`MessageQueueStatusChanged` broadcast can never be silently skipped.
- `sqliteRepository.TakeHead` checks `RowsAffected()` after DELETE;
when two concurrent take callers race past the busy-timeout the
loser sees 0 affected rows and now returns `nil, nil` instead of
the already-drained message (would otherwise dispatch the same
prompt twice).
- `Service.GetStatus` returns `Entries: []` instead of `nil` on the
error path so the wire shape stays consistent (frontend already
guards but strict consumers wouldn't tolerate the type mismatch).
- New tests: `queue-api.test.ts` covers `rethrowQueueError` mappings
(queue_full / entry_not_found / generic / Error pass-through);
`session-slice.upsert.test.ts` covers `setQueueEntries`,
`removeQueueEntry`, and `clearQueueStatus`. Backend gains an
agent-impersonation handler test.
- `rethrowQueueError` now surfaces `WSError.message` for non-queue
errors instead of stringifying the whole object.
- Cleanup: replace unused `a, c := ...` discards in service_test
with `_, _ = ...`.
* fix(queue): scope update/remove by session_id (cross-session deletion guard)
The MCP `queue_full` error payload deliberately discloses sibling-task
entry IDs (so the calling agent's LLM can reason about the wedge state).
Without a session_id filter on `DeleteByID` / `UpdateContent`, a hostile
agent that received that payload could call `wsRemoveEntry` /
`wsUpdateMessage` against another task's entries and delete or rewrite
them — only the per-entry UUID was being checked.
- `Repository.UpdateContent` and `Repository.DeleteByID` now require
`sessionID` and add `AND session_id = ?` to the SQL guard. The memory
repo mirrors the scope (lookup keyed on session before the entry scan).
- `Service.UpdateMessage` / `Service.RemoveEntry` take `sessionID`; the
WS handlers thread `req.SessionID` through (already validated as
non-empty in the previous fixup).
- TypeScript: `session_id` is now required on `updateQueuedMessage` /
`removeQueuedEntry` params so callers fail at compile time, matching
the backend contract.
- Tests cover the cross-session attack: `RemoveEntry`/`UpdateMessage`
with an attacker-supplied session_id but a real entry id from another
session must return `ErrEntryNotFound` and leave the victim entry
untouched. SQLite repo gets parallel coverage.
* fix(queue): propagate transfer error + tighten WSError narrowing
- `Service.TransferSession` now returns an error so callers can fail
closed instead of silently leaving entries orphaned on the previous
session. The two existing call sites pick the right policy:
`switchSessionForStep` (reusing an existing session) propagates the
error so the workflow switch aborts; the new-session path logs and
continues, since the new session is already committed and rolling
back here would leave a half-switched workflow.
- `asWSError` now also narrows on `message` / `details`, so WS payloads
without a `code` field are still mapped to a meaningful `Error.message`
via `rethrowQueueError` (instead of "[object Object]"). Native
`Error` instances explicitly skip the WS-error branch so they pass
through untouched, preserving the existing pass-through guarantee.
- `queue-api.test.ts`: `expect.assertions(N)` on the catch-only tests
so a missing throw fails the test instead of silently passing.
* fix(queue): check TransferSession error in service tests
The TransferSession signature change in 83abe6d7 broke errcheck on two
test sites that hadn't been updated. Wrap them in require.NoError.
Carlos Florêncio