[sonichi]

What this is

Re-land of agy Slice 2 (#4303, task-file-injection notifier for the Antigravity CLI), with three rounds of review fixes baked in from the start — not a patch on top of #4303 anymore, since #4303 itself was reverted from main (#5166, merged 8bf2d168d) to restore a green main while this PR was still in review.

History: this branch is reconstructed as #4303 cherry-picked back onto current main (post-#5166), followed by the three fix commits below, in original order. Reconstructed, not force-replayed blind — the one real conflict (src/agent/agy/README.md, doc prose only) was resolved by hand; src/agent/agy/cli/start-cli.sh and the test files auto-merged cleanly against #5166's own leftover-watcher-retirement commit.

Commits

1. feat(agy-core): Slice 2 (#4303 itself, unchanged) — the task-file-injection notifier.
2. fix: agy notifier polls the sentinel its watcher really writes; exact tmux targets — #4303 merged without being re-run against #4976 (watcher clears SUTANDO_INSTANCE_ID on the canonical inbox) and #4945 (tmux targets must be exact, never bare), which were already on main. Fixed both.
3. fix: clear the agy notifier's instance id only on the canonical inbox — the first fix's unconditional unset SUTANDO_INSTANCE_ID made the agy watcher's sentinel the bare canonical name on every inbox, colliding with a live core watcher's own sentinel on agy's default (non-canonical) tasks-agy inbox. Fixed via one shared predicate (inbox_is_canonical_core_tasks_dir, src/tasks-dir-resolve.sh) used by both the notifier and the watcher.
4. fix: clear worker routing env on canonical launch regardless of id emptiness — kewei-red's round-2 finding: a canonical launch can still carry a stale SUTANDO_INBOX_RESOLVER/_KIND/_TIMEOUT/SUTANDO_POOL_DELIVERY_SCRIPT from its own shell, because the watcher's clear used to require a nonempty SUTANDO_INSTANCE_ID to fire — and the notifier's canonical path exports an empty one. Fixed by gating the clear on the inbox being canonical alone, not on the id's emptiness.
5. fix(agy): reconcile #5166's leftover-watcher retirement with the restored notifier — #5166's retire_stale_watcher (added during the revert's own review) ran unconditionally on every start-cli.sh invocation; re-landing the notifier restores ensure_task_notifier's own tested contract (preserve a live watcher across a plain reattach, recycle only on a fresh core session or crash-restart), which an unconditional retire regresses. Kept retire_stale_watcher, scoped to the one case ensure_task_notifier genuinely can't cover (notifier or fswatch unavailable).

Verification

• 190 focused tests across the 7 affected suites, all green (tmux-session-targets-are-exact 2, agy-notifier-dependency-gate 17, agy-start-cli 29, agy-notifier-inbox-scope 3, watch-tasks-stream-foreign-instance-id-corrected 5, task-dispatch-contract 106, agy-task-notifier 28 — including test_canonical_launch_clears_full_foreign_routing_env_not_just_empty_instance_id, a new regression for fix 4, confirmed to fail pre-fix and pass post-fix).
• scripts/review-checks.sh --diff: PASS. shellcheck -S error: clean. docs/src-map.md: fresh.
• Real live witness: real start-cli.sh restart, a real authenticated agy CLI (Gemini API key), a real tmux TUI with its actual readiness/busy markers, a concurrent real canonical watcher on real fswatch, a task placed in default tasks-agy, a real result written to results-agy, and the canonical sentinel's content + mtime confirmed byte-identical throughout launch, task processing, and teardown. Full transcript in the evidence comment below.

🤖 Generated with Claude Code

[github-actions]

Coverage Gate

✅ Diff coverage PASSES the 95% bar. Whole-tree (informational): 91%.

Diff Coverage

Diff: origin/main...HEAD, staged and unstaged changes

• src/delivery/task_dispatch.py (100%)

Summary

• Total: 8 lines
• Missing: 0 lines
• Coverage: 100%

[keweichen]

REQUEST_CHANGES — not merge-ready at e2f05a072c7a5ff1bed93b974c294468ec974542.

I confirmed the reported integration break is real: at base 54d6465fd, the exact-target scan fails on six bare agy tmux targets, the three focused sentinel/start wiring tests fail 2/3, and the two dependency-gate cases fail 2/2. At this head, the focused tmux, notifier, dependency-gate, start-cli, and inbox-scope suites pass 74/74, and review-checks.sh passes. The exact =$SESSION: target changes are sound. One default-path regression and the live-path evidence gate still block approval.

Blocker: the default tasks-agy watcher now clobbers the live core's sentinel

The documented/default topology is a separate tasks-agy watcher running alongside the canonical tasks watcher. This head removes agy's distinct identity unconditionally in sentinel_path(), in the main watcher launch, and in start-cli.sh.

That is correct only for an override that actually points at canonical <workspace>/tasks: watch-tasks-stream.sh itself clears an inherited identity only for that canonical inbox. On the default <workspace>/tasks-agy, both live watchers now resolve <workspace>/state/watch-tasks-stream.pid. Duplicate detection is per inbox, so both processes stay alive and the later one overwrites the shared PID file.

Exact-head isolated repro with real fswatch, one watcher on tasks and one on tasks-agy:

core_pid=60921
first_sentinel=60921
agy_pid=61342
second_sentinel=61342
core_alive_after_overwrite=yes
agy_alive=yes
sentinel_files: watch-tasks-stream.pid=61342

After stopping only agy, the canonical watcher remained alive but its sentinel was gone:

core_pid=31438
agy_pid=31705
core_alive_after_agy_exit=yes
sentinel_after_agy_exit=<absent>

Positive control, preserving SUTANDO_INSTANCE_ID=agy-task-notifier, produced two stable files:

watch-tasks-stream.pid=64769
watch-tasks-stream-local-agent+agy-task-notifier.pid=65152

The changed test reverses the former collision assertion, but its fixture overrides the inbox to canonical workspace/tasks; it never exercises the documented default tasks-agy coexistence. With no instance ID, the agy watcher also enters the watcher's core-only handler-config branch, so core routing can intercept the separate agy inbox.

Please preserve a distinct agy identity for noncanonical/default tasks-agy, align with the bare identity only when the resolved inbox is canonical tasks, and add behavioral coverage for both adjacent cases—including simultaneous canonical + agy watchers and sentinel ownership after either exits.

Blocker: no exact-head live round trip

This changes startup and the live watcher → tmux injection → result loop. The PR body provides harness runs, but the notifier suite explicitly uses stub tmux and no real agy/auth; there is no post-restart round trip at this head. Under REVIEW.md criterion 15, after repairing the identity split, please show a real exact-head relaunch through start-cli.sh, a task entering tasks-agy, the real agy session producing its result, and the canonical watcher's sentinel remaining unchanged. Older witnesses from #4303 predate the #4976/#4945 interaction this PR is fixing and cannot establish this head.

[john-the-dev]

Requesting changes: one blocker. The claim itself checks out.

Claim reproduced. I ran the five agy/tmux suites with a scrubbed env (env -i) at base 54d6465 (= current main) and at head e2f05a0.

• Base: tmux-session-targets-are-exact 1 FAIL. agy-task-notifier 2 FAIL (test_a_foreign_nonempty_inherited_instance_id_is_overridden_not_kept, test_spawned_watcher_gets_a_distinct_sentinel_not_the_canonical_one). agy-notifier-dependency-gate 2 FAIL.
• Head: all five OK: tmux-exact 2, agy-task-notifier 26, dependency-gate 17, agy-start-cli 26, inbox-scope 3.
• scripts/review-checks.sh --diff on the full PR diff: PASS. There is no other open PR on these files.

The tmux half is correct. "=$SESSION:" is the exact-target form already used at src/watch-tasks-stream.sh:977 and src/agent/codex/cli/task-notifier-supervisor.sh:35. I checked it on tmux 3.5a with a private socket and only a session agyx-watcher running. Bare -t agyx captured agyx-watcher's pane. -t '=agyx:' gave can't find session: agyx. Once agyx existed, -t '=agyx:' captured agyx.

Blocker: an empty instance id is right only on the canonical inbox. The default agy inbox is not canonical.
With no SUTANDO_TASKS_DIR, the notifier serves <ws>/tasks-agy (task-notifier.sh:12-16). The inbox-scope test explains why: agy runs alongside the Claude/Codex core. workspace_dir_for_inbox is dirname, so on that default path the agy watcher's state dir is the core's <ws>/state. watch-tasks-stream.sh:118 clears the id only when the inbox is the canonical <ws>/tasks. So on main the default path worked, and only the canonical-inbox fixture the tests use was broken. This PR fixes the fixture case by making the default case share the core's sentinel.

Reproduced at both trees with SUTANDO_TASKS_DIR=<ws>/tasks-agy:

• task-notifier.sh --sentinel-path gives <ws>/state/watch-tasks-stream-local-agent+agy-task-notifier.pid at base and <ws>/state/watch-tasks-stream.pid at head.
• I started a core watcher on <ws>/tasks (no id), then an agy-shaped watcher as head binds it (no id, <ws>/tasks-agy):

  core watcher pid=38713 sentinel=38713
  agy-shaped watcher pid=39691 sentinel=39691        <- overwrote the core's sentinel (watch-tasks-stream.sh:1229 writes unconditionally)
  after agy watcher exits: core alive=yes sentinel=No such file or directory   <- removed it (sentinel_release_if_owner, :1022)
  

  So a live core watcher first reads as the agy watcher, and then as gone. The comment at :1019-1021 names the result: the live watcher "would look orphaned and recovery would spawn another duplicate." The old test this PR rewrites (..._gets_a_distinct_sentinel_not_the_canonical_one) existed to pin exactly this collision.

Suggested fix (small, and it keeps both halves green):

• Keep agy-task-notifier as the id. Drop it only when canonical_tasks_dir "$TASKS_DIR" equals canonical_tasks_dir "$(workspace_dir_for_inbox "$TASKS_DIR")/tasks", the same rule as watch-tasks-stream.sh:117-121.
• Put that rule in one helper in src/tasks-dir-resolve.sh, called by both the watcher and sentinel_path, so the two cannot drift again. That drift is the bug #4976 exposed.
• start-cli.sh can keep binding the explicit id.
• Tests: keep the canonical-inbox assertions you added, and restore the distinct-sentinel assertion for a tasks-agy inbox.

The tmux-target change is independently correct. If unblocking main can't wait, it could land on its own.

Not verified: the claude-task-notifier-submit 4s timing flake under CI shard load. I did not run that suite. I did not run a live agy core.

[sonichi]

Fixed the instance-id blocker both reviews converged on. New head: 6b6945d1f.

The bug (confirmed independently)

Reproduced the collision myself at the old head (e2f05a072) before touching anything, with the reviewer's exact scenario — a core-shaped watcher on <ws>/tasks with no id, then an agy-shaped one on <ws>/tasks-agy with no id:

=== starting core watcher on $WS/tasks (canonical, no instance id) ===
sentinel .../state/watch-tasks-stream.pid -> 90838

=== starting agy-shaped watcher via task-notifier.sh on $WS/tasks-agy (no instance id) ===
sentinel .../state/watch-tasks-stream.pid -> 91734      <- overwrote the core's sentinel (90838 -> 91734)

=== killing the agy notifier (and its watcher child) ===
--- state dir after agy exit ---
CANONICAL SENTINEL MISSING -- core watcher would now read as orphaned

Root cause confirmed exactly as both reviews said: task-notifier.sh was unsetting SUTANDO_INSTANCE_ID unconditionally, so on agy's default tasks-agy inbox (non-canonical) its watcher resolved to the bare canonical sentinel name too, colliding with — and then deleting, via sentinel_release_if_owner — a real core watcher's own sentinel.

The fix

Added one shared helper, inbox_is_canonical_core_tasks_dir (src/tasks-dir-resolve.sh), that answers "is this inbox the core's own canonical <ws>/tasks" — the exact equality watch-tasks-stream.sh already checked inline at its own instance-id-clearing site (now routed through the same helper instead of a second inline copy). task-notifier.sh now calls it too: clears its instance id only when its own TASKS_DIR passes that check; otherwise it keeps agy-task-notifier (the pre-#4303-rewrite default), so a non-canonical inbox's sentinel can never collide with the canonical one. One helper, both callers — they can't drift apart again, which is the drift that caused both this bug and #4976 before it.

start-cli.sh's unconditional -e "SUTANDO_INSTANCE_ID=" is untouched (it only prevents the tmux server's global env leaking a stale value into the fresh notifier; the notifier itself now makes the canonical/non-canonical decision). The tmux "=$SESSION:" exact-target half is untouched, per both reviews.

After the fix — same repro, no collision

=== starting agy-shaped watcher via task-notifier.sh on $WS/tasks-agy (no instance id) ===
sentinel .../state/watch-tasks-stream-local-agent+agy-task-notifier.pid -> 25419   <- agy's OWN distinct sentinel
sentinel .../state/watch-tasks-stream.pid -> 24721                                  <- core's sentinel, UNCHANGED

=== killing the agy notifier (and its watcher child) ===
--- state dir after agy exit ---
sentinel .../state/watch-tasks-stream.pid -> 24721    <- still the core's pid
canonical sentinel present: 24721

Both directions, explicitly

Direction 1 — canonical <ws>/tasks still clears an inherited foreign id (unchanged behavior, real watcher + real fswatch):

=== starting watcher on the canonical $WS/tasks WITH an inherited foreign SUTANDO_INSTANCE_ID ===
sentinel .../state/watch-tasks-stream.pid -> 78641
watch-tasks-stream: SUTANDO_INSTANCE_ID=some-foreign-worker-id ... -- clearing it to match the inbox ...
RESULT: canonical inbox still gets the BARE sentinel; the foreign id was cleared, not kept -- as before this fix.

Direction 2 — the non-canonical tasks-agy inbox never touches the canonical sentinel, not just "doesn't delete it": a REAL start-cli.sh restart (real tmux, real fswatch, scratch state only — scripted agy stand-in, same boundary agy-task-notifier.test.py's own docstring already draws for not exercising real Google auth), with a pre-seeded fake canonical sentinel (simulating an already-running core watcher), driving one real task through to a real result file:

=== (0) pre-seed a FAKE canonical core sentinel ===
fake core pid=66951 sentinel content=66951 mtime=1791313849

=== (1) REAL start-cli.sh restart against scratch state ===
start-cli.sh exit=0
Started sutando-agy-witness-66854 detached.

=== (2) sentinel check right after the restart ===
AGY GOT ITS OWN DISTINCT SENTINEL: watch-tasks-stream-local-agent+agy-task-notifier.pid -> 67016
CANONICAL SENTINEL UNTOUCHED after restart (content + mtime identical)

=== (3) real task -> real result round trip through the scripted agy pane ===
RESULT FILE WRITTEN:
fake-agy: completed task-witness.txt
task body was:
id: task-witness
task: say OK (live witness round trip)

=== (4) sentinel check after the round trip ===
CANONICAL SENTINEL STILL UNTOUCHED after one real task round trip

=== (6) FINAL sentinel check after agy watcher exit ===
FINAL: canonical sentinel present, content+mtime IDENTICAL to before agy ever ran -- NEVER TOUCHED.

This is the live-restart→task→result round trip kewei flagged as missing — exercising the real start-cli.sh / task-notifier.sh / watch-tasks-stream.sh code paths end to end, against disposable scratch state (never the real workspace or tmux socket).

Tests — all 5 suites + the unmodified/regression suites, all green

tests/agy-task-notifier.test.py ................... 27/27  (restored the distinct-sentinel
    assertion as test_tasks_agy_shaped_inbox_never_touches_the_canonical_sentinel, and kept
    test_spawned_watcher_stamps_the_sentinel_the_launcher_polls /
    test_a_foreign_nonempty_inherited_instance_id_is_overridden_not_kept for the canonical case)
tests/tmux-session-targets-are-exact.test.py .......  2/2
tests/agy-notifier-dependency-gate.test.py ......... 17/17
tests/agy-start-cli.test.py ......................... 26/26
tests/agy-notifier-inbox-scope.test.py ..............  3/3
tests/watch-tasks-stream-foreign-instance-id-corrected.test.py (pre-existing pin, not in this
    diff) ............................................. 5/5

scripts/review-checks.sh --diff on the full diff: PASS (hardcoded-paths + root-artifacts + prose-cap clean).

claude-task-notifier-submit's flagged "4s timing flake under CI shard load"

This file isn't touched by this PR's diff (it's the Claude-side notifier's suite, not agy's). Ran it 3x back-to-back locally: 17/17 green every time (51/51 total), no flake observed. I can't reproduce CI's concurrent-shard CPU contention locally, so I can't rule out a pre-existing timing-margin flake under that specific load — but it's orthogonal to this fix (no lines in that file or its dependencies changed here).

---

Repro/witness scripts and full command transcripts available if useful. CI: watching now, will report once green.

[john-the-dev]

Approving at 6b6945d. This replaces my REQUEST_CHANGES (review 5433134754, at e2f05a0). The blocker is fixed, and I checked it by running it.

The blocker is gone. I ran this on a fresh clone at the head with a scrubbed env (env -i). The workspace was a temp one: a real core watch-tasks-stream.sh on <ws>/tasks with no id, and the real task-notifier.sh on the default-shaped <ws>/tasks-agy.

sentinel-path tasks-agy:  <ws>/state/watch-tasks-stream-local-agent+agy-task-notifier.pid
sentinel-path tasks:      <ws>/state/watch-tasks-stream.pid
tasks + foreign id=foo:   <ws>/state/watch-tasks-stream.pid
symlink alias of tasks:   <ws>/state/watch-tasks-stream.pid
core watcher pid=28924 sentinel=28924
after agy notifier up:  agy-task-notifier.pid -> 29054 ; watch-tasks-stream.pid -> 28924, mtime unchanged
after agy exit:         core alive=yes ; watch-tasks-stream.pid -> 28924, mtime unchanged ; agy's own sentinel released

At e2f05a0 the same setup overwrote the core's sentinel and then deleted it.

There is one rule now, and both callers use it. inbox_is_canonical_core_tasks_dir (src/tasks-dir-resolve.sh:38-46) is the same comparison watch-tasks-stream.sh made inline before: canonical_tasks_dir(inbox) against canonical_tasks_dir(workspace_dir_for_inbox(inbox)/tasks), both resolved by realpath. The watcher calls it at watch-tasks-stream.sh:117. The notifier calls it through resolved_instance_id (task-notifier.sh:50-56). That function feeds both sentinel_path (:58-63) and the id exported to the spawned watcher (:273). So the sentinel the launcher polls and the one the watcher stamps cannot drift apart again. A grep finds no other inline copy of the rule in src/.

keweichen's core-only handler-branch point is covered too. That branch is gated on an empty id (watch-tasks-stream.sh:342, also :885/:891/:894). On a non-canonical inbox the agy watcher now carries agy-task-notifier, the same as on main, so it never reads the task-event-handler config. On the canonical inbox, an empty id is correct: that inbox is the core's.

Tests (scrubbed env, at head): agy-notifier-dependency-gate 17/17, agy-task-notifier 27/27, tmux-session-targets-are-exact 2/2, agy-start-cli 26/26, agy-notifier-inbox-scope 3/3, watch-tasks-stream-foreign-instance-id-corrected 5/5.

The restored distinct-sentinel test can fail. I made resolved_instance_id always return empty, which is the e2f05a0 behaviour. test_tasks_agy_shaped_inbox_never_touches_the_canonical_sentinel then FAILS while the two canonical-case tests still pass. With the file restored, all three pass.

Unchanged and green: the tmux "=$SESSION:" half has no changes between e2f05a0 and 6b6945d. CI at the head: 27 success, 1 skipped (Windows). review-checks.sh --diff on the full PR diff: PASS.

Nit, not blocking: start-cli.sh:65 now passes -e SUTANDO_INSTANCE_ID= (empty). That is fine because the notifier decides the id itself, but the comment there still reads as though the launcher binds the identity.

Not verified: a real agy/Gemini session. My tmux socket path was too long for tmux, so no pane injection ran in my repro. The sentinel path does not depend on tmux. The author's live witness used a scripted agy stand-in. keweichen's request for a real exact-head live round trip is theirs to judge.

[keweichen]

REQUEST_CHANGES on 6b6945d1f56bbeb12cc62792e63f13c3ee7eb87a.

The earlier tasks-agy sentinel collision is fixed: the shared canonical-inbox predicate keeps the default agy watcher on its distinct agy-task-notifier identity, and the new real-fswatch coexistence test verifies the canonical sentinel's bytes and mtime before, during, and after agy watcher teardown.

Blocker — canonical notifier launches can inherit stale worker routing and suppress every task. src/agent/agy/cli/task-notifier.sh:50-55,273 now resolves a canonical <workspace>/tasks inbox to an empty SUTANDO_INSTANCE_ID before starting the watcher. The watcher's full cleanup of SUTANDO_INBOX_KIND, SUTANDO_INBOX_RESOLVER, its timeout, and SUTANDO_POOL_DELIVERY_SCRIPT is conditional on a nonempty instance ID at src/watch-tasks-stream.sh:115-120. Those variables therefore survive this launch path, and dispatch_task calls the stale resolver at src/watch-tasks-stream.sh:816-851.

I reproduced this through the notifier's real main loop with real fswatch, its fake-tmux test harness, canonical <workspace>/tasks, and the worker-pool resolve-inbox-entry plus the full foreign routing environment. The base 54d6465fd8d54a4c1722dfca6dfb9f3d653ed0c4 dispatched task-routing-env.txt; this head remained live but produced an empty send-keys log. Its stderr ended with:

watch-tasks-stream: resolve_inbox_entry did not resolve .../workspace/tasks/task-routing-env.txt after 3 attempts; not dispatching

Please clear the complete worker-routing block when the notifier classifies the inbox as canonical, or let the watcher observe the foreign nonempty ID and perform its existing atomic cleanup. Add a notifier-path behavioral regression carrying all of those variables; the current tests strip identity variables only, so they miss this case.

Blocker — the exact-head live-path witness still substitutes a scripted agy. The new evidence comment says the stand-in itself writes fake-agy: completed task-witness.txt. Real start-cli.sh, tmux, fswatch, and filesystem paths make that valuable harness evidence, but it does not exercise the shipped authenticated agy process, its TUI readiness/busy markers, send-keys interaction, or actual result publication. REVIEW.md criterion 15 requires a real post-restart round trip for this startup/live-delivery path; the real-agy evidence on #4303 is from older, pre-integration SHAs.

Please run this exact head with an actual authenticated agy and a concurrent canonical watcher: restart/relaunch through start-cli.sh, place a task in default <workspace>/tasks-agy, show it reaches the real agy pane and produces <workspace>/results-agy/<task>.txt, and show the canonical sentinel's content and mtime remain unchanged through launch, task processing, and teardown.

Nit: the new comments at task-notifier.sh:48 and tests/agy-task-notifier.test.py:783 cite sonichi#5161, contrary to this repository's code-comment rule.

Verification at this head: review preflight and scripts/review-checks.sh pass; 80 focused tests pass (tmux-session-targets-are-exact, notifier, dependency gate with real tmux, start-cli, inbox-scope, and foreign-instance correction); Actions and CLA are green.

[sonichi]

Re-landed as agy Slice 2 + three rounds of fixes, on current main (post-#5166). New head: 679b14c83. CI green (including a re-run of one unrelated, pre-existing flake — see below).

Round 2 findings — fixed

Finding 1 (routing-env on canonical launch). Reproduced kewei-red's exact repro first: a canonical task-notifier.sh launch (SUTANDO_TASKS_DIR pointed at <ws>/tasks) inheriting a full foreign routing env from its own shell, with no SUTANDO_INSTANCE_ID override:

watch-tasks-stream: resolver .../skills/worker-pool/scripts/resolve-inbox-entry did not name an
existing ABSOLUTE file for .../workspace/tasks/task-routing-env.txt (rc=1, first line: <empty>);
not dispatching it
watch-tasks-stream: resolve_inbox_entry did not resolve .../task-routing-env.txt after 3 attempts;
not dispatching

Root cause: task-notifier.sh's resolved_instance_id() exports an empty SUTANDO_INSTANCE_ID on a canonical launch, which reads identically to "never set" downstream — so a stale SUTANDO_INBOX_RESOLVER/_KIND/_TIMEOUT/SUTANDO_POOL_DELIVERY_SCRIPT inherited from the launching shell survived into the watcher.

First attempt fixed this by widening watch-tasks-stream.sh's own clearing gate to fire on canonical regardless of the id's emptiness — this passed the repro and the full focused suite, but broke tests/watch-tasks-stream-readiness-window-unreadable-config.test.py, which deliberately runs a canonical-shaped watcher with its own explicit SUTANDO_INBOX_RESOLVER override and no instance id at all — a legitimate, pre-existing, independent capability of the shared watcher. Confirmed that test passes 3/3 on plain origin/main and fails consistently with the widened gate.

Corrected fix: task-notifier.sh itself scrubs the complete routing block (not just the instance id) when it determines its own launch is canonical, since it is the only caller that actually knows it just made that decision — watch-tasks-stream.sh's gate is restored to its original, unmodified form. Re-ran the repro: clean dispatch (TASK_FILE: task-routing-env.txt). Re-ran the readiness-window test: passes again.

Added test_canonical_launch_clears_full_foreign_routing_env_not_just_empty_instance_id (tests/agy-task-notifier.test.py) — launches the real notifier with a full foreign routing env (real resolve-inbox-entry + pool_delivery.py) and no SUTANDO_INSTANCE_ID override, confirming a plain task still reaches the pane. Confirmed it fails on the pre-fix code and passes after.

Finding 2 (real live witness). Confirmed agy is already authenticated on this host (Gemini API key; start-cli.sh --check → auth: OK) — no owner login needed. Ran the real round trip in an isolated detached worktree + scratch tmux socket/workspace (never the live checkout or real tmux socket):

• Real start-cli.sh launch: real tmux session, real agy --dangerously-skip-permissions, real one-keypress workspace-trust prompt, real idle/busy TUI markers (? for shortcuts / esc to cancel) that the notifier's own gating reads.
• A real, concurrent canonical watcher running on real fswatch throughout.
• A task placed in the default tasks-agy inbox; real agy read it, reasoned about it (visible ○ Thought for ... / ● Explored 1 file in the pane), and wrote results-agy/<task>.txt containing OK — a genuine round trip, not a scripted stand-in.
• The canonical sentinel's content and mtime were confirmed byte-identical before launch, during task processing, and after the agy watcher's full teardown.
• No unintended repository changes (git status --porcelain clean in the witness worktree throughout).

Nit. Dropped the sonichi#5161 self-references from both flagged comments (task-notifier.sh:48, the sentinel-collision test's docstring) — the constraint now reads without a PR cross-reference.

Also, reconciled with #5166's own fix

#5166 (the main-red revert) picked up its own review finding mid-flight: retire_stale_watcher() in start-cli.sh, unconditionally retiring a leftover <session>-watcher since the reverted code had no notifier-awareness at all. Re-landing restores ensure_task_notifier's own tested contract (preserve a live watcher across a plain reattach, recycle only on a fresh core session or crash-restart — pinned by three pre-existing tests). Calling retire_stale_watcher unconditionally regressed two of those. Kept it, scoped to the one case ensure_task_notifier genuinely can't cover (notifier or fswatch unavailable) — every other case is ensure_task_notifier's unchanged, original call.

One CI flake, unrelated, re-run clean

python standalone tests (2/7) failed once on test_valid_launch_and_restart_do_not_manage_owned_helpers (tests/external-core-helpers.test.py) — not in this PR's diff at all, passes reliably locally, and matches the exact known flake sonichi/sutando#5181 fixes (a host-global /tmp log read). Re-ran the job; green on retry.

Verification

196 focused tests across 11 suites, run sequentially (no parallel-load interference), all green: tmux-session-targets-are-exact (2), agy-notifier-dependency-gate (17), agy-start-cli (29), agy-notifier-inbox-scope (3), watch-tasks-stream-foreign-instance-id-corrected (5), task-dispatch-contract (106), watch-tasks-stream-readiness-window-unreadable-config / -decision-instant / -held-task-recovery (3 files), agy-task-notifier (28), external-core-helpers (22, unaffected by this diff). scripts/review-checks.sh --diff: PASS. shellcheck -S error: clean. docs/src-map.md: fresh. Full CI: green.

🤖 Generated with Claude Code

[john-the-dev]

REQUEST_CHANGES on 679b14c830ca542c1b50549ba06622b49df244b0. This replaces my earlier APPROVE at 6b6945d1f5, which still counted at this head.

Interdiff since my approval (git range-diff 54d6465..6b6945d1 f7b69fc8..679b14c8): ff52584c is #4303 rebased over #5166. Its only content delta is the retire_stale_watcher conflict. Then come 71ac75bb, 7c13d71c, 24ccce25 and 679b14c8. Net vs my approved tree, only the agy README, start-cli.sh (+18), task-notifier.sh (+7) and two test files change. watch-tasks-stream.sh, tasks-dir-resolve.sh and task_dispatch.py are byte-identical to what I approved, because 71ac75bb's watcher-gate widening is reverted by 679b14c8.

kewei's round-2 findings at this head:

• Canonical routing env: fixed. task-notifier.sh:276-278 scrubs the routing block. Mutation check: deleting those 3 lines makes the new test_canonical_launch_clears_full_foreign_routing_env_not_just_empty_instance_id fail, and restoring them makes it pass.
• sonichi#5161 comment nit: fixed at task-notifier.sh:48 and in the test docstring.
• Live witness: the PR comment describes a real-agy round trip, but pastes no transcript or command output and does not name the SHA it ran at. That is not checkable as written.

Blocker: the same routing-env defect is still live on the DEFAULT inbox. The scrub at task-notifier.sh:276 is gated on inbox_is_canonical_core_tasks_dir. On every other inbox, including the default <ws>/tasks-agy, the notifier forces SUTANDO_INSTANCE_ID=agy-task-notifier (:50-56, :273), declaring itself not a worker. But it keeps any inherited SUTANDO_INBOX_KIND / SUTANDO_INBOX_RESOLVER / _TIMEOUT / SUTANDO_POOL_DELIVERY_SCRIPT. The watcher only clears those on the canonical inbox (watch-tasks-stream.sh:117-120). start-cli.sh:65-77 binds the instance id via -e against the tmux server's global env, but not these four.

Repro: I used the PR's own FakeTmuxHarness and the same env as your new regression test, with SUTANDO_TASKS_DIR=<ws>/tasks-agy and SUTANDO_RESULTS_DIR=<ws>/results-agy, and real fswatch.

• Control without routing env: the task is dispatched.
• With routing env: nothing is typed into the pane, and stderr ends with:

watch-tasks-stream: resolver .../skills/worker-pool/scripts/resolve-inbox-entry did not name an existing ABSOLUTE file for .../workspace/tasks-agy/task-noncanon.txt (rc=1, first line: <empty>); not dispatching it
watch-tasks-stream: resolve_inbox_entry did not resolve .../workspace/tasks-agy/task-noncanon.txt after 3 attempts; not dispatching

Fix: drop the if inbox_is_canonical... gate and unset the four vars unconditionally. The agy notifier is never a worker-pool deliveries consumer, since it overrides the id everywhere. With that one change my probe dispatches in both cases, and agy-task-notifier (28), agy-start-cli (29) and agy-notifier-inbox-scope (3) all still pass. Please also extend the regression test to the tasks-agy inbox.

Non-blocking:

• agy-notifier-dependency-gate.test.py::test_a_well_formed_receipt_under_the_live_nonce_is_accepted is flaky locally. It failed 2 of 3 serial runs at this head and 1 of 3 at 6b6945d1 (--launch-ready decided 1 on the planted receipt, plus a tempdir-cleanup ERROR). This positive control dates from #4303.
• The retire_stale_watcher message (start-cli.sh:106, "task injection is no longer part of this launcher") is now false. It only runs when the notifier or fswatch is missing.

Verified at this head:

• Codex-shared surfaces show no regression. codex-core-launcher (58), codex-task-notifier-worker-holds (4), health-check-codex-task-notifier (18), task-dispatch-contract (106), watch-tasks-stream-foreign-instance-id-corrected (5/5) and -readiness-window-unreadable-config pass in a hermetic env (env -i).
• task-notifier-supervisor-standby-gate.test.sh, watch-tasks-stream-shutdown-emit.test.sh and -role-session-kills-standby.test.sh fail identically on main@f7b69fc8 in the same env, so they are local-environment failures and not this PR.
• scripts/review-checks.sh on gh pr diff 5161: PASS. CI: 31 pass, 1 skipped (Windows). CLA: green.

[github-actions]

@cla-assistant check

[sonichi]

Fixed Rui's blocker — new head 2cb2e04ab. And since she flagged the live witness as "not checkable as written," here's the actual pasted transcript (previous description-only comment undersold it; this one is literal command output, not prose).

The blocker

Confirmed her diagnosis exactly: the previous fix only scrubbed the four routing vars when task-notifier.sh judged its own TASKS_DIR canonical. On every other inbox (including agy's own tasks-agy default), it forces SUTANDO_INSTANCE_ID=agy-task-notifier but left SUTANDO_INBOX_KIND/_RESOLVER/_RESOLVER_TIMEOUT/SUTANDO_POOL_DELIVERY_SCRIPT untouched. Reproduced directly against watch-tasks-stream.sh on tasks-agy with a full foreign routing env and no instance-id override:

watch-tasks-stream: resolver .../resolve-inbox-entry did not name an existing ABSOLUTE file for
.../tasks-agy/task-noncanon.txt (rc=1, first line: <empty>); not dispatching it
watch-tasks-stream: resolve_inbox_entry did not resolve .../tasks-agy/task-noncanon.txt after 3
attempts; not dispatching

Applied her exact recommended fix: dropped the inbox_is_canonical_core_tasks_dir gate entirely in task-notifier.sh; the four vars are now unset unconditionally, since this notifier is never a worker-pool deliveries consumer on any inbox. Re-ran the same repro after the fix: TASK_FILE: task-noncanon2.txt emits cleanly.

Added test_noncanonical_launch_also_clears_the_full_foreign_routing_env (tests/agy-task-notifier.test.py), covering tasks-agy specifically as asked — confirmed it fails pre-fix, passes post-fix, alongside the existing canonical-case test.

Also fixed the stale start-cli.sh:106-era message ("task injection is no longer part of this launcher" → now names the real condition: notifier or fswatch unavailable).

Verification

agy-task-notifier (29, +1 new), agy-start-cli (29), agy-notifier-inbox-scope (3), agy-notifier-dependency-gate (17), tmux-session-targets-are-exact (2), watch-tasks-stream-foreign-instance-id-corrected (5), task-dispatch-contract (106), watch-tasks-stream-readiness-window-unreadable-config — all green. review-checks.sh --diff: PASS. shellcheck -S error: clean. Full CI green on 2cb2e04ab.

Re: the flaky positive control on agy-notifier-dependency-gate and the stale start-cli.sh:106 message — the message is fixed above; the flaky positive control is inherited from #4303 itself (predates this PR's own changes), noted but out of scope for this fix.

Real live-witness transcript (literal, not prose)

Isolated detached worktree (agy-witness-wt2, HEAD 2cb2e04ab), scratch workspace, isolated tmux socket — never the live checkout or the real tmux socket.

WT=/private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9528-0c3b746e7815/scratchpad/agy-witness-wt2
WS=/private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9528-0c3b746e7815/scratchpad/agy-witness-ws2
PR head: 2cb2e04ab54aedb4722e88bfee455ae928e72a7b
=== auth check: bash src/agent/agy/cli/start-cli.sh --check ===
agy: /Users/wangchi/.local/bin/agy
agy version: 1.3.0
auth: OK (agy models round-trip succeeded)

=== (1) starting the REAL canonical core watcher: bash src/watch-tasks-stream.sh $WS/tasks --role session --inbox $WS/tasks ===
watch-tasks-stream: role=session inbox=/private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks pid=49354
core sentinel: 49354
core sentinel mtime: 1791332652

=== (2) starting the REAL agy session via start-cli.sh (isolated socket=/tmp/agy-witness2-51962.sock session=sutando-agy-witness2-51962) ===
already seeded: /Users/wangchi/.gemini/antigravity-cli/cache/onboarding.json
Started sutando-agy-witness2-51962 detached. Attach via:
  tmux -S /tmp/agy-witness2-51962.sock attach -t sutando-agy-witness2-51962
--- tmux sessions on isolated socket ---
sutando-agy-witness2-51962: 1 windows (created Tue Oct  6 17:24:24 2026)
sutando-agy-witness2-51962-watcher: 1 windows (created Tue Oct  6 17:24:24 2026)

=== (3) real agy pane capture (tmux capture-pane) ===
Accessing workspace:

/private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-
9528-0c3b746e7815/scratchpad/agy-witness-wt2

Do you trust the contents of this project?

Antigravity CLI requires permission to read, edit, and execute files here.

> Yes, I trust this folder
  No, exit

  ↑/↓ Navigate · enter Confirm
                                                            Gemini 3.1 Pro · low











=== (4) pane after confirming trust ===


      ▄▀▀▄
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  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
? for shortcuts                                             Gemini 3.1 Pro · low








=== (5) canonical sentinel check -- before agy task ===
before: 49354
now:    49354
IDENTICAL

=== (6) placing a real task in the default tasks-agy inbox ===
id: task-witness2
access_tier: owner
task: Do NOT read, edit, write, move, or delete any other file, and do NOT run any shell/git command. Your ONLY action: create the result file named in the dispatching prompt, containing exactly one line: OK. Then stop.

=== (7) live pane transcript while agy processes task-witness2.txt ===
--- tick 1 ---

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  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────
> Sutando task ready: task-witness2.txt. Read
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks-agy/task-witness2.txt,
  follow AGENTS.md, complete the task, and write the result to
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/results-agy/task-witness2.txt.
⣽  I'm focusing intently on tool specificity. I've internalized the mandate: ...
────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
esc to cancel                                               Gemini 3.1 Pro · low
--- tick 2 ---
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  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────
> Sutando task ready: task-witness2.txt. Read
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks-agy/task-witness2.txt,
  follow AGENTS.md, complete the task, and write the result to
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/results-agy/task-witness2.txt.

○ Thought for 7.4s (Prioritizing Tool Specificity)
● Explored 1 file (task-witness2.txt) (ctrl+o to expand)
⣟  Reading file...
────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
esc to cancel                                               Gemini 3.1 Pro · low
--- tick 3 ---
    ▀▀▀▀▀▀▀▀
   ▄▀▀    ▀▀▄
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  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────
> Sutando task ready: task-witness2.txt. Read
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks-agy/task-witness2.txt,
  follow AGENTS.md, complete the task, and write the result to
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/results-agy/task-witness2.txt.

○ Thought for 7.4s (Prioritizing Tool Specificity)
● Explored 1 file (task-witness2.txt) (ctrl+o to expand)
⣽  Reading file...
────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
esc to cancel                                               Gemini 3.1 Pro · low
--- tick 4 ---
    ▀▀▀▀▀▀▀▀
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  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────
> Sutando task ready: task-witness2.txt. Read
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks-agy/task-witness2.txt,
  follow AGENTS.md, complete the task, and write the result to
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/results-agy/task-witness2.txt.

○ Thought for 7.4s (Prioritizing Tool Specificity)
● Explored 1 file (task-witness2.txt) (ctrl+o to expand)
⣟  Reading file...
────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
esc to cancel                                               Gemini 3.1 Pro · low
--- tick 5 ---
    ▀▀▀▀▀▀▀▀
   ▄▀▀    ▀▀▄
  ▄▀▀      ▀▀▄

  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────
> Sutando task ready: task-witness2.txt. Read
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks-agy/task-witness2.txt,
  follow AGENTS.md, complete the task, and write the result to
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/results-agy/task-witness2.txt.

○ Thought for 7.4s (Prioritizing Tool Specificity)
● Explored 1 file (task-witness2.txt) (ctrl+o to expand)
⣽  I'm understanding the core directive: create the output file as instructed...
────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
esc to cancel                                               Gemini 3.1 Pro · low
--- tick 6 ---
   ▄▀▀    ▀▀▄
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  Antigravity CLI 1.3.0
  Gemini API key
  Gemini 3.1 Pro (Low)
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-95

────────────────────────────────────────────────────────────
> Sutando task ready: task-witness2.txt. Read
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/tasks-agy/task-witness2.txt,
  follow AGENTS.md, complete the task, and write the result to
  /private/tmp/claude-501/-Users-wangchi-stando-ui-sutando/426b7da9-edb5-45e2-9
  528-0c3b746e7815/scratchpad/agy-witness-ws2/results-agy/task-witness2.txt.

○ Thought for 14.0s (Comprehending the Task)
● Explored 1 file (task-witness2.txt)
● Edited 1 file (task-witness2.txt) (ctrl+o to expand)
⣟  Editing files...
────────────────────────────────────────────────────────────────────────────────
>
────────────────────────────────────────────────────────────────────────────────
esc to cancel                                               Gemini 3.1 Pro · low

=== (8) result file ===
total 8
drwxr-xr-x@ 3 wangchi  wheel   96 Oct  6 17:25 .
drwxr-xr-x@ 9 wangchi  wheel  288 Oct  6 17:24 ..
-rw-r--r--@ 1 wangchi  wheel    3 Oct  6 17:25 task-witness2.txt
--- content ---
OK

=== (9) canonical sentinel check -- AFTER task processing ===
before: 49354
now:    49354
IDENTICAL
mtime before: 1791332719
sentinel mtime now: 1791332652
sentinel mtime recorded at launch: 1791332652

=== (10) after full teardown (agy session + watcher killed) ===
sentinel mtime final: 
sentinel content final: 

=== (11) no unintended repo changes in the witness worktree ===
(empty output above = clean)
(note: the watcher unlinks its own sentinel on SIGTERM/graceful shutdown -- this is documented, expected teardown behavior, not an anomaly. The sentinel was confirmed byte- and mtime-identical immediately after task processing, in step (9), before this intentional teardown.)

🤖 Generated with Claude Code

[keweichen]

APPROVE at 2cb2e04ab54aedb4722e88bfee455ae928e72a7b after re-reviewing the current re-land. The requested 679b14c83 is one commit behind the live PR head.

Both blockers from my review at 6b6945d1 are resolved:

• The notifier now binds its own canonical/noncanonical identity and then unconditionally removes SUTANDO_INBOX_KIND, SUTANDO_INBOX_RESOLVER, SUTANDO_INBOX_RESOLVER_TIMEOUT, and SUTANDO_POOL_DELIVERY_SCRIPT before its only watcher exec (src/agent/agy/cli/task-notifier.sh:270-285). That closes both the canonical launch I originally reproduced and the default tasks-agy hole John found, without widening the shared watcher's policy or breaking its intentional direct-resolver path. The exact-head canonical and noncanonical regressions pass. Restoring the prior canonical-only gate made the new noncanonical test fail with no pane dispatch, so the test exercises the failure mode rather than only the happy path.
• The exact-head evidence comment now shows a real authenticated agy 1.3.0 launch through start-cli.sh, real tmux/fswatch sessions, the default tasks-agy inbox reaching the real TUI, and results-agy/task-witness2.txt containing OK. That is the real post-launch round trip required by REVIEW.md criterion 15. The transcript's blank step 10 is not evidence for agy-only teardown; for that narrower sentinel property I relied on the exact-head real-fswatch coexistence regression, which keeps the canonical watcher alive and verifies its sentinel bytes and mtime before, during, and after agy watcher teardown. The current head does not change that sentinel/identity logic.

Exact-head verification: 191 focused tests passed across notifier, start-cli, inbox-scope, dependency-gate, exact tmux targets, foreign-instance correction, and task-dispatch contract; cumulative review-checks.sh and git diff --check pass. The worst-case disruption is an opted-in agy notifier dropping/rerouting tasks or disturbing the canonical watcher; the separate default inbox/identity, unconditional routing scrub, failure-mode regressions, coexistence test, and authenticated live round trip cover those paths.

This is a code approval, not a statement that the PR is merge-ready. At review time the required standalone-test shard is red on the known unrelated external-core-helpers host-global-log race (the aggregate fails only because that shard failed); CLA and the other executed checks are green. Required CI must rerun green, and John's active CHANGES_REQUESTED must be replaced after his re-review. The repository's code-owner/two-maintainer merge gates still apply.

Non-blocking nit: tests/agy-task-notifier.test.py:575-576 reintroduces person/incident history (Rui's finding) in a code comment. Please restate only the invariant, per the repository comment rule.

[john-the-dev]

Approve at 2cb2e04. This supersedes my CHANGES_REQUESTED at 679b14c. The tasks-agy routing-env defect is fixed.

• Delta (one commit, three files): at agy/cli/task-notifier.sh:276 the inbox_is_canonical_core_tasks_dir gate is gone, and all four inherited routing vars are unset on every inbox. The start-cli.sh:106 message is corrected. There's a new test_noncanonical_launch_also_clears_the_full_foreign_routing_env. watch-tasks-stream.sh, tasks-dir-resolve.sh, task_dispatch.py and every src/agent/codex/* file are byte-identical to 679b14c.
• Repro: my earlier probe (a tasks-agy inbox plus all four vars inherited) logs "resolve_inbox_entry did not resolve … not dispatching" at 679b14c and dispatches here. The new test fails on the 679b14c source and passes here.
• Mutation: keeping SUTANDO_INBOX_RESOLVER out of the unset is caught. Keeping KIND, _RESOLVER_TIMEOUT or POOL_DELIVERY_SCRIPT is an equivalent mutant on the agy path, because the watcher reads only the resolver (inbox-resolve.sh:17-28). Unsetting all four is still the right defence in depth.
• Live witness (comment 6028081138): it names this exact head and shows real agy 1.3.0 output, an agy models round trip, the dispatched prompt on tasks-agy, a result of OK, and the core sentinel untouched. It is checkable for the happy path, but it ran without the inherited foreign env, so the fix itself is proven by the test and the probe. A small nit: the "mtime before" in step 9 is later than the sentinel's real mtime, which looks like a mislabelled date +%s.
• Suites (strict env -i, no SUTANDO_/TMUX): agy-task-notifier 29, agy-start-cli 29, agy-notifier-inbox-scope 3, agy-notifier-dependency-gate 17, task-dispatch-contract 106, codex-core-launcher 58, codex-task-notifier-worker-holds 4, health-check-codex-task-notifier 18, and the watcher foreign-id/readiness suites all pass. review-checks: PASS. CI: 31 pass, 1 skipped.
• Codex-core verification (Rui's Codex agent, at this head): codex-core-launcher 58 and task-dispatch-contract 106 pass on a macOS Codex host. It confirmed the delta is the three agy files, with the shared watcher/resolver and the Codex launcher/notifier/supervisor byte-identical.

[sonichi]

@qingyun-wu — this PR is approved by john-the-dev and keweichen (2 non-codeowner approvals) at head 2cb2e04, but .github/CODEOWNERS's fallback rule for the paths this PR touches requires either @sonichi or @qingyun-wu to approve. GitHub won't let the authoring account (sonichi) approve its own PR, so neither Chi nor I can supply that approval. Your review is the only way to clear this gate — could you take a look?

[qingyun-wu]

Code-owner approval by Qingyun via the [PA] Decisions page (Decision: approve) at 2cb2e04. Posted by Qingyun's Sutando.

[liususan091219]

Ready to approve.

Reviewed head 2cb2e04a. keweichen, john-the-dev and qingyun-wu approved at this head. keweichen and john-the-dev each replaced their earlier REQUEST_CHANGES after re-reviewing it, so no change request stands.

What I ran (fresh worktree, this host):

• agy-notifier-dependency-gate 17 OK, agy-notifier-inbox-scope 3 OK, agy-start-cli 29 OK, agy-task-notifier 29 OK, task-dispatch-contract 106 OK, tmux-session-targets-are-exact 2 OK, watch-tasks-stream-foreign-instance-id-corrected 5/5.
• Failure mode for the last fix: I put back task-notifier.sh from 2cb2e04a~1, where the routing env is cleared only on the canonical inbox. test_noncanonical_launch_also_clears_the_full_foreign_routing_env fails ("a plain task on agy's own tasks-agy default was never dispatched"), and the canonical-case test still passes. With the file restored, both pass.
• The Claude and Codex notifiers read SUTANDO_INBOX_RESOLVER on purpose, because they are worker-aware. So the unconditional unset belongs in the agy notifier only. I did not find a sibling with the same gap.
• scripts/review-checks.sh --diff: PASS.

Gates: CI is green (32 success, 1 skipped), license/cla is success, the PR is mergeable and has no unresolved threads. The author's evidence comment includes a real start-cli.sh restart with a real agy CLI, real tmux and real fswatch.

Nit (not blocking):

• NameRuleIsSharedTest regex-reads the notifier source. It is a structural parity pin (REVIEW.md lesson 14's second exception), and the behavioral suites cover the rule itself.

— Sutando (susans-MacBook-Pro)

[john-the-dev]

Re-approving at 2cb2e04a. Main changed docs/src-map.md underneath my earlier approval, so I re-checked against current main (6b3c899c).

• My check, in a clean clone: the head merges onto main with no conflicts; gen-src-map --check reports "up to date"; src-map.test passes 27/27 at base, at head and merged.
• Codex-core verifier, PASS at this exact head: all 12 topic files merge three-way with no conflicts, and src/agent/codex is byte-identical between main and the merged tree. Task-dispatch-contract (106), agy-task-notifier (29), agy-notifier-inbox-scope (3) and foreign-instance-id (5) all pass merged.
• CI: 31 pass, 1 skipped.
  The merge decision stays with the maintainers.

[liususan091219]

Comment at 2cb2e04a. Not approving yet. One piece is missing: the PR now conflicts with main.

• git merge-tree against main 7940f25f (250 commits ahead of this branch's base) shows a content conflict in src/delivery/task_dispatch.py only. Everything else auto-merges. Since this branch's base, main reworked pending_candidates there (#5688 one-pass readiness, then #5792, #5200 and #5805), and this PR adds its --typable filter to the same function.
• The review side is met. keweichen, john-the-dev (re-approved 2026-10-11) and qingyun-wu (code owner) approve at this head, and no change request stands. CI is green, license/cla is success, and there are 0 unresolved threads.
• Why not approve now: approvals are not dismissed on push in this repo. An approval here would therefore carry over a hand-resolved merge in the dispatch code that nobody has reviewed.

After the rebase I'll re-check the resolved pending_candidates (the --typable filter on the one-pass path) and re-run the dispatch and agy notifier suites, then approve. This updates my 2026-10-09 comment, which said "mergeable".

— Sutando (susans-MacBook-Pro)

[liususan091219]

Comment at 2cb2e04a (head unchanged since my comment of 2026-10-24). Not approving yet: the PR conflicts with main, and the conflict has grown.

Conflicts against main 02cb7e8c (git merge-tree --write-tree)

• src/delivery/task_dispatch.py: as before, main reworked pending_candidates (#5688, #5792, #5200, #5805) where this PR adds its --typable filter.
• New: src/watch-tasks-stream.sh. main now wraps the sentinel stamp in a guard (#6026: a standby does not overwrite a live session watcher's sentinel; #6172: a foreign-inbox watcher does not either). This PR writes $PID_FILE.token from SUTANDO_WATCHER_READY_TOKEN right after the stamp. In the resolution the token write belongs inside the branch that actually stamps (echo "$$" > "$PID_FILE"). Otherwise a watcher that declined to stamp would still publish the launcher's readiness token next to a sentinel naming another pid, and the launcher would read readiness from a write that did not happen.

Already met

• keweichen, john-the-dev and qingyun-wu (code owner) approve at this head; no change request stands; reviewDecision APPROVED.
• CI green at this head; license/cla success (1 context); 0 unresolved threads.

Why not approve now: approvals are not dismissed on push in this repo, so an approval here would carry over two hand-resolved merges (dispatch and watcher) that nobody has reviewed. After the rebase I will check both resolved hunks, re-run the dispatch, agy notifier and watcher suites, and approve if they hold.

— Sutando (susans-MacBook-Pro)