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S5 follow-up: stacked-hold flows test and conversation test cleanup #1533

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opened 2026-10-10 03:09:47 +00:00 by jarvis · 6 comments
jarvis commented 2026-10-10 03:09:47 +00:00
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Brief: docs/plans/2026-10-10_s5-follow-up-and-hygiene.md, heading "S5 follow-up: stacked-hold flows test and conversation test cleanup". Row 40 (#1522) landed as 08b428ec; mutant Mr survives (Darkwing round 3 note 1) and a conversation shim.mjs outlived a gate run. Owner Dewey; reviewers Darkwing and Filbert.

Brief: `docs/plans/2026-10-10_s5-follow-up-and-hygiene.md`, heading "S5 follow-up: stacked-hold flows test and conversation test cleanup". Row 40 (#1522) landed as 08b428ec; mutant Mr survives (Darkwing round 3 note 1) and a conversation shim.mjs outlived a gate run. Owner Dewey; reviewers Darkwing and Filbert.
dewey commented 2026-10-10 03:47:40 +00:00
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Review request for queue row 47, round 1: S5 follow-up: stacked-hold flows test and conversation test cleanup

  • Owner: dewey
  • Reviewers: darkwing, filbert
  • Gate: darkwing and filbert approve on #1533; conversation, webui and every test-*.sh green on Sage's gate rerun; mutant Mr killed (sage)
  • Brief: docs/plans/2026-10-10_s5-follow-up-and-hygiene.md § S5 follow-up: stacked-hold flows test and conversation test cleanup @24ceb88c4070
  • Candidate: manifest 0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f

The manifest:

dfd9be08c4a31ee536bbcd9bfd8e73cd8baa4114086b55845627ea0c97023e2a  agents/dewey/work/queue-47/evidence.md
061ca09644d03690c92b2d09f3b13d407f194fe0b590125692c359d10bace395  packages/conversation/tests/claim.test.mjs
9bb32c730e6fd1d6648ff623cd6ded71cda300ede2d618e28ee6b682626d4d01  packages/conversation/tests/cohort.test.mjs
896f09586916ffdb399b2b5bd04770473a6dd62938d1e9cc0a7e0239f32a36ef  packages/conversation/tests/flows.test.mjs
ca003075749dec9368c91f282c8218d602eeb8c6290282a884876be5af2d87e6  packages/conversation/tests/harness.mjs
2ae5d7b8119f29654e1672d1948992be79e973049a50da99250de7ade26b2071  packages/conversation/tests/races.test.mjs

Check a tree against it with scripts/mosaic queue review verify-commit 47 REF.

Post your verdict as a comment here, then record it:

scripts/mosaic queue review record 47 --verdict approve|changes --comment COMMENT_ID --candidate 0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f --op OP --by SEAT
<!-- mosaic-queue-op: dewey-r47-review-1 --> <!-- mosaic-queue-round: row=47 round=1 candidate=0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f --> Review request for queue row 47, round 1: S5 follow-up: stacked-hold flows test and conversation test cleanup - Owner: dewey - Reviewers: darkwing, filbert - Gate: darkwing and filbert approve on #1533; conversation, webui and every test-*.sh green on Sage's gate rerun; mutant Mr killed (sage) - Brief: `docs/plans/2026-10-10_s5-follow-up-and-hygiene.md` § S5 follow-up: stacked-hold flows test and conversation test cleanup @24ceb88c4070 - Candidate: manifest `0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f` The manifest: ```text dfd9be08c4a31ee536bbcd9bfd8e73cd8baa4114086b55845627ea0c97023e2a agents/dewey/work/queue-47/evidence.md 061ca09644d03690c92b2d09f3b13d407f194fe0b590125692c359d10bace395 packages/conversation/tests/claim.test.mjs 9bb32c730e6fd1d6648ff623cd6ded71cda300ede2d618e28ee6b682626d4d01 packages/conversation/tests/cohort.test.mjs 896f09586916ffdb399b2b5bd04770473a6dd62938d1e9cc0a7e0239f32a36ef packages/conversation/tests/flows.test.mjs ca003075749dec9368c91f282c8218d602eeb8c6290282a884876be5af2d87e6 packages/conversation/tests/harness.mjs 2ae5d7b8119f29654e1672d1948992be79e973049a50da99250de7ade26b2071 packages/conversation/tests/races.test.mjs ``` Check a tree against it with `scripts/mosaic queue review verify-commit 47 REF`. Post your verdict as a comment here, then record it: ``` scripts/mosaic queue review record 47 --verdict approve|changes --comment COMMENT_ID --candidate 0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f --op OP --by SEAT ```
dewey commented 2026-10-10 03:48:21 +00:00
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Round 1 notes for the candidate in comment 27036 (manifest agents/dewey/work/queue-47/candidate-manifest.sha256, digest 0587e393…6055f). The candidate is uncommitted; only queue revs 277-278 are committed (10351f6a). No push.

The packet, agents/dewey/work/queue-47/evidence.md, follows in full.

Mr

flows.test.mjs gains "terminal: a hold inside held input holds again, and
once it is drained later input and Ctrl-C still reach the terminal (Darkwing
note 1 on #1522)". It is the draft in ~/dewey-scratch/s5/mr-test.patch
unchanged. Under Mr (holds = this.held !== null; after the re-parse in
#run becomes holds = false;) it is the only failing test, 164/165.

Why the shim outlived the suite

  • src/shim.mjs ignores SIGTERM and SIGHUP (line 188) and exits only on the
    release op once engine reports populated 0 (line 160).
  • No src/ code sends release. forceStopCohort (src/cohort.mjs:150)
    runs term, freeze, members and kill, then returns its proof. Controller
    close doesn't release either. So after a force stop the scope stays up
    with its shim, reparented to the systemd user manager, until something
    SIGKILLs the unit.
  • Two claim tests force-stop a scope and leave it: W5's probe fixture
    (the traced release run) and W13. Both relied on the file's after
    hook, whose reap sends systemctl --user kill and stop with a 5 s
    timeout and checks neither result.
  • On 7ab2f92d with logging added (scratch only,
    ~/dewey-scratch/s5/probe-instrumentation.diff), the W5 probe unit was
    active from probe close (03:29:14.783Z) to the start of after
    (03:29:43.671Z), and inactive after reap (03:29:44.211Z).
  • In Filbert's row 41 round 2 gate the shim left running was
    chat03-nWFPcN/f55, unit mosaic-chat-cd9f5111af2b95a6b6110b9a1. That is
    the W5 probe: f55 is the probe fixture in claim.test, and the afterleak
    mutant below leaks the same fixture. The user journal shows it started at
    20:43:51.093 local and never killed.

Limit of the evidence: that journal has no mosaic-chat lines after
20:43:56 local, though W5 ran 33.7 s and passed
(~/filbert-scratch/s6-logs/gate-r2/node-conversation.txt). The system
journal isn't readable to me. So I can show the probe was left for after
and that after's kill didn't land in that run, but not why the
systemctl call missed.

The change

  • harness.mjs: liveShims(root) lists running shims whose socket is
    under root, from /proc cmdline and cgroup. killShims(root) SIGKILLs
    each one's scope and then the shim by PID. shimsGone(root, ms) waits up
    to 5 s and returns what is left. reap(fx) ends with
    killShims(fx.base), so a shim the records don't name, or one the
    unchecked systemctl calls missed, is still killed.
  • claim.test.mjs: W5 reaps its probe and W13 reaps its fixture as soon
    as they close, not in after.
  • cohort.test.mjs K19: if its own kill or release fails, the finally
    SIGKILLs the scope before asserting, so a failure doesn't leave the
    shim for after.
  • claim, cohort and races (the files that launch scopes): after reaps,
    sweeps with killShims(), waits with shimsGone(), and then asserts
    that no shim is left ("no shim outlives this file (#1533)"). A failing
    after hook fails the file in node:test, with exit 1. Each file also
    ends with a test "no shim from this file's tests is left running for the
    after hook", which names the test's leak before after cleans it up.
    tmp is per process, so each file checks only its own shims.

The shim keeps ignoring SIGTERM. That is deliberate (README, force stop:
"so that a stray TERM never drops the scope's anchor"), so the fix is in the
tests that spawn it.

Finding for Sage (out of scope, not fixed)

A force-stopped scope never ends on its own: nothing in src/ sends
release, so its shim and the empty scope stay up until something kills the
unit. In tests that is now handled. In a running controller each force stop
leaves one mosaic-chat-*.scope with an idle node shim. This is in
cohort.mjs/controller.mjs, which the brief puts out of scope, so I
haven't touched it. I recommend a follow-up row: after a proven force stop
(and on close of a stopped binding), send release, with a test that the
unit is gone afterwards.

Mutation check

Scratch copies of the working tree, the full conversation suite per mutant
(~/dewey-scratch/s5/mut-tools/run.sh). After each run the runner lists
any shim left under the mutant's TMPDIR, then SIGKILLs its scope and PID.

Mutant Change Result Shims left after the suite Killed by
base none 165/165 none (baseline)
Mr holds = false; after re-parsing held text killed, 164/165 none terminal: a hold inside held input holds again …
noprobe W5 doesn't reap its probe killed, 164/165 none claim: no shim from this file's tests is left running for the after hook
now13 W13 doesn't reap its fixture killed, 164/165 none the same test
afterleak noprobe, and after doesn't reap or sweep killed, 164 pass, 2 fail 1 (mosaic-chat-c719df56e9490f21f5919fe8e, killed by the runner) the same test, and the claim file's after hook

The afterleak hook failure:

✖ .../packages/conversation/tests/claim.test.mjs (5101.703413ms)
  AssertionError [ERR_ASSERTION]: no shim outlives this file (#1533)
  + [
  +   {
  +     pid: 3106581,
  +     socket: '/home/jwoltje/dewey-scratch/s5/tmp/chat03-S6WdOu/f55/sock/shim-c719df56e949.sock',
  +     unit: 'mosaic-chat-c719df56e9490f21f5919fe8e'
  +   }
  + ]
  - []

That run is the round 2 leak reproduced on purpose: the probe's shim
outlives the suite. With the candidate's after hook it can't.

Gate

Sequential, on a detached worktree of 21e0f1a3 with the candidate's test
changes applied (patch sha256 f57759e0…41df9d), 03:42:59Z to 03:47:11Z,
output in ~/dewey-scratch/s5/r47-gate/out/:

  • conversation 165/0, webui 22/0
  • test-auth 15/0, test-conductor 17/0, test-config 24/0, test-discord 66/0,
    test-extension-package 18/0, test-foundation 44/0, test-release 14/0,
    test-task 98/0
  • test-queue 27/0 (node 148/0). Its canonical-root check skips in a
    worktree, as it does in every worktree gate.

No shim was running after the gate.

Round 1 notes for the candidate in comment 27036 (manifest `agents/dewey/work/queue-47/candidate-manifest.sha256`, digest 0587e393…6055f). The candidate is uncommitted; only queue revs 277-278 are committed (10351f6a). No push. The packet, `agents/dewey/work/queue-47/evidence.md`, follows in full. ## Mr `flows.test.mjs` gains "terminal: a hold inside held input holds again, and once it is drained later input and Ctrl-C still reach the terminal (Darkwing note 1 on #1522)". It is the draft in `~/dewey-scratch/s5/mr-test.patch` unchanged. Under Mr (`holds = this.held !== null;` after the re-parse in `#run` becomes `holds = false;`) it is the only failing test, 164/165. ## Why the shim outlived the suite - `src/shim.mjs` ignores SIGTERM and SIGHUP (line 188) and exits only on the `release` op once `engine` reports `populated 0` (line 160). - No `src/` code sends `release`. `forceStopCohort` (`src/cohort.mjs:150`) runs term, freeze, members and kill, then returns its proof. Controller close doesn't release either. So after a force stop the scope stays up with its shim, reparented to the systemd user manager, until something SIGKILLs the unit. - Two claim tests force-stop a scope and leave it: W5's probe fixture (the traced release run) and W13. Both relied on the file's `after` hook, whose `reap` sends `systemctl --user kill` and `stop` with a 5 s timeout and checks neither result. - On 7ab2f92d with logging added (scratch only, `~/dewey-scratch/s5/probe-instrumentation.diff`), the W5 probe unit was `active` from probe close (03:29:14.783Z) to the start of `after` (03:29:43.671Z), and `inactive` after `reap` (03:29:44.211Z). - In Filbert's row 41 round 2 gate the shim left running was `chat03-nWFPcN/f55`, unit `mosaic-chat-cd9f5111af2b95a6b6110b9a1`. That is the W5 probe: f55 is the probe fixture in claim.test, and the `afterleak` mutant below leaks the same fixture. The user journal shows it started at 20:43:51.093 local and never killed. Limit of the evidence: that journal has no `mosaic-chat` lines after 20:43:56 local, though W5 ran 33.7 s and passed (`~/filbert-scratch/s6-logs/gate-r2/node-conversation.txt`). The system journal isn't readable to me. So I can show the probe was left for `after` and that `after`'s kill didn't land in that run, but not why the `systemctl` call missed. ## The change - `harness.mjs`: `liveShims(root)` lists running shims whose socket is under `root`, from `/proc` cmdline and cgroup. `killShims(root)` SIGKILLs each one's scope and then the shim by PID. `shimsGone(root, ms)` waits up to 5 s and returns what is left. `reap(fx)` ends with `killShims(fx.base)`, so a shim the records don't name, or one the unchecked `systemctl` calls missed, is still killed. - `claim.test.mjs`: W5 reaps its probe and W13 reaps its fixture as soon as they close, not in `after`. - `cohort.test.mjs` K19: if its own kill or release fails, the `finally` SIGKILLs the scope before asserting, so a failure doesn't leave the shim for `after`. - claim, cohort and races (the files that launch scopes): `after` reaps, sweeps with `killShims()`, waits with `shimsGone()`, and then asserts that no shim is left ("no shim outlives this file (#1533)"). A failing `after` hook fails the file in node:test, with exit 1. Each file also ends with a test "no shim from this file's tests is left running for the after hook", which names the test's leak before `after` cleans it up. `tmp` is per process, so each file checks only its own shims. The shim keeps ignoring SIGTERM. That is deliberate (README, force stop: "so that a stray TERM never drops the scope's anchor"), so the fix is in the tests that spawn it. ## Finding for Sage (out of scope, not fixed) A force-stopped scope never ends on its own: nothing in `src/` sends `release`, so its shim and the empty scope stay up until something kills the unit. In tests that is now handled. In a running controller each force stop leaves one `mosaic-chat-*.scope` with an idle node shim. This is in `cohort.mjs`/`controller.mjs`, which the brief puts out of scope, so I haven't touched it. I recommend a follow-up row: after a proven force stop (and on close of a stopped binding), send `release`, with a test that the unit is gone afterwards. ## Mutation check Scratch copies of the working tree, the full conversation suite per mutant (`~/dewey-scratch/s5/mut-tools/run.sh`). After each run the runner lists any shim left under the mutant's TMPDIR, then SIGKILLs its scope and PID. | Mutant | Change | Result | Shims left after the suite | Killed by | |---|---|---|---|---| | base | none | 165/165 | none | (baseline) | | Mr | `holds = false;` after re-parsing held text | killed, 164/165 | none | terminal: a hold inside held input holds again … | | noprobe | W5 doesn't reap its probe | killed, 164/165 | none | claim: no shim from this file's tests is left running for the after hook | | now13 | W13 doesn't reap its fixture | killed, 164/165 | none | the same test | | afterleak | noprobe, and `after` doesn't reap or sweep | killed, 164 pass, 2 fail | 1 (`mosaic-chat-c719df56e9490f21f5919fe8e`, killed by the runner) | the same test, and the claim file's `after` hook | The `afterleak` hook failure: ``` ✖ .../packages/conversation/tests/claim.test.mjs (5101.703413ms) AssertionError [ERR_ASSERTION]: no shim outlives this file (#1533) + [ + { + pid: 3106581, + socket: '/home/jwoltje/dewey-scratch/s5/tmp/chat03-S6WdOu/f55/sock/shim-c719df56e949.sock', + unit: 'mosaic-chat-c719df56e9490f21f5919fe8e' + } + ] - [] ``` That run is the round 2 leak reproduced on purpose: the probe's shim outlives the suite. With the candidate's `after` hook it can't. ## Gate Sequential, on a detached worktree of 21e0f1a3 with the candidate's test changes applied (patch sha256 `f57759e0…41df9d`), 03:42:59Z to 03:47:11Z, output in `~/dewey-scratch/s5/r47-gate/out/`: - conversation 165/0, webui 22/0 - test-auth 15/0, test-conductor 17/0, test-config 24/0, test-discord 66/0, test-extension-package 18/0, test-foundation 44/0, test-release 14/0, test-task 98/0 - test-queue 27/0 (node 148/0). Its canonical-root check skips in a worktree, as it does in every worktree gate. No shim was running after the gate.
filbert commented 2026-10-10 03:59:14 +00:00
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Filbert, row 47 (#1533) round 1: approve.

The candidate manifest 0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f (6 files) matches the request (comment 27036). I snapshotted it and applied it over 10351f6a, and all 6 files check OK. The diff touches five test files, +110/−8: harness.mjs, claim.test.mjs, cohort.test.mjs, races.test.mjs and flows.test.mjs. No source file changes, which fits the brief: terminal.mjs and controller.mjs are untouched.

The leaked shim

Dewey's account holds against the source:

  • src/shim.mjs:188-189 ignores SIGTERM and SIGHUP, and the shim exits only on release once the engine's cgroup reports populated 0 (shim.mjs:160).
  • A force stop never sends release, so the scope and its shim stay up until something kills them.
  • Before this change, W5's probe and W13's fixture relied on the after hook's reap, whose systemctl kill and stop results aren't checked.

I can't add to why the kill missed in my round 2 run either. I have no journal evidence beyond Dewey's. The production side, a force-stopped scope that never ends, is now row 50 (#1536), so it stays out of this row.

What changed, checked

  • W5 now calls reap(probe) after the probe's controller closes, and W13 calls reap(fx) at its end. Both fixtures are also tracked, so the after hook still covers a test that throws first.
  • harness.mjs gains liveShims(root). It reads /proc, matches argv[1] ending in /shim.mjs, argv[2] === "--socket" and argv[3] under root + "/", and takes the unit from the cgroup path. The root defaults to this process's mkdtemp directory, so one test file never sees, or kills, another file's shims. reap ends with killShims(fx.base); sockets live in fx.base/sock, so the root matches.
  • claim, cohort and races each end with a test asserting no shim is left before the after hook runs, and the hook asserts none is left after its own kill. The last test is what catches a leaking test; the hook's assertion only catches a kill that failed. Dewey's afterleak mutant shows both firing.
  • K19's finally now checks that kill and release succeed and falls back to a scope SIGKILL if release failed.
  • flows.test.mjs: the stacked-hold test feeds Ctrl-T, Ctrl-O and hi\r both as three chunks and as one. It asserts that held drains to null, that the later yo is sent, and that Ctrl-C still quits.

Notes (non-blocking)

N1. Nothing checks that liveShims can see a shim. Every new assertion expects an empty list, so a liveShims that matches nothing passes them all. My mutant blind+noprobe (argv[2] !== "--sockets", and W5 without reap(probe)) passes claim 27/27. No shim was left afterwards, because the after hook's reap(probe) still killed the unit, but the leak the row is about would no longer be detected. One line fixes this: in W5, before reap(probe), assert that liveShims(probe.base) holds exactly one shim with a mosaic-chat- unit. That also pins the claim in the comment, that a force stop leaves the shim running.

N2. killShims SIGKILLs the first .scope in the cgroup path without checking its name. Today the only launcher is ScopeLauncher (cohort.mjs:105), so a matching shim is always in a mosaic-chat-* scope. The shim also needs a delegated scope to start (it writes cgroup.procs under its own cgroup), so a long-lived shim outside one is unlikely. But reap's comment names "a direct launch". If one ever matched, the parsed unit would be whatever scope encloses the launcher, for example a terminal's app-*.scope, and the whole terminal would be SIGKILLed. Suggest killing only units that start with mosaic-chat- and leaving the per-pid kill for the rest. Under T3 the test process is in t3code.service, so such a parse would give null here, and no kill.

N3. K19 awaits proc.exited with no bound. If kill, release and the scope SIGKILL all fail, the test hangs until the runner's timeout instead of failing on its assertions. Minor; a Promise.race with a timer would make it fail fast.

None of these blocks the row's gate. N1 is the one I'd take in this row if there is another round.

Mutants

Each mutant was restored from a copy and checked with cmp. After each run I listed shims left under that run's TMPDIR.

Mutant Change Result Shims left
base none claim 27/27 0
Mr terminal.mjs:158 holds = this.held !== null; becomes holds = false; flows 27/1: "terminal: a hold inside held input holds again …" fails n/a
blind+noprobe liveShims matches --sockets, and W5 drops reap(probe) claim 27/27, survives (N1) 0

Dewey's noprobe, now13 and afterleak results are in comment 27037. I didn't rerun them.

Gate

The gate ran in a detached worktree at 10351f6a with the candidate applied. Suites ran one at a time, with output teed. TMPDIR was on the scratch disk, and DOCKER_HOST=unix:///nonexistent.sock.

Suite Pass Fail
business (node) 60 0
bus (node) 67 0
cli (node) 66 0
control-board (node) 124 0
conversation (node) 165 0
discord (node) 178 0
ledger (node) 78 0
mosaic (node) 69 0
queue (node) 148 0
seat (node) 19 0
tasks (node) 51 0
webui (node) 22 0
test-auth 15 0
test-conductor 17 0
test-config 24 0
test-discord 66 0
test-extension-package 18 0
test-foundation 44 0
test-queue 27 0
test-release 4 0
test-task 26 2

test-task's two failures are the base's: with Docker unreachable it skips the Docker cases and fails "user recall run succeeds" and "recalled user name", as at 0a4c8f13 in my row 41 gate. Dewey's 98/0 was a run with Docker. bus, cli and seat count fewer tests than my row 41 gate because that one had row 41's uncommitted candidate applied. After the gate, no shim was left running under my scratch directory.

No push.

**Filbert, row 47 (#1533) round 1: approve.** The candidate manifest `0587e393746e5cc6bb31e06b94461661fc7679f6f5fa6a72835c60b286a6055f` (6 files) matches the request (comment 27036). I snapshotted it and applied it over `10351f6a`, and all 6 files check OK. The diff touches five test files, +110/−8: `harness.mjs`, `claim.test.mjs`, `cohort.test.mjs`, `races.test.mjs` and `flows.test.mjs`. No source file changes, which fits the brief: `terminal.mjs` and `controller.mjs` are untouched. ## The leaked shim Dewey's account holds against the source: - `src/shim.mjs:188-189` ignores SIGTERM and SIGHUP, and the shim exits only on `release` once the engine's cgroup reports `populated 0` (`shim.mjs:160`). - A force stop never sends `release`, so the scope and its shim stay up until something kills them. - Before this change, W5's probe and W13's fixture relied on the `after` hook's `reap`, whose `systemctl` kill and stop results aren't checked. I can't add to why the kill missed in my round 2 run either. I have no journal evidence beyond Dewey's. The production side, a force-stopped scope that never ends, is now row 50 (#1536), so it stays out of this row. ## What changed, checked - W5 now calls `reap(probe)` after the probe's controller closes, and W13 calls `reap(fx)` at its end. Both fixtures are also `track`ed, so the `after` hook still covers a test that throws first. - `harness.mjs` gains `liveShims(root)`. It reads `/proc`, matches `argv[1]` ending in `/shim.mjs`, `argv[2] === "--socket"` and `argv[3]` under `root + "/"`, and takes the unit from the cgroup path. The root defaults to this process's `mkdtemp` directory, so one test file never sees, or kills, another file's shims. `reap` ends with `killShims(fx.base)`; sockets live in `fx.base/sock`, so the root matches. - claim, cohort and races each end with a test asserting no shim is left before the `after` hook runs, and the hook asserts none is left after its own kill. The last test is what catches a leaking test; the hook's assertion only catches a kill that failed. Dewey's `afterleak` mutant shows both firing. - K19's `finally` now checks that `kill` and `release` succeed and falls back to a scope SIGKILL if `release` failed. - `flows.test.mjs`: the stacked-hold test feeds Ctrl-T, Ctrl-O and `hi\r` both as three chunks and as one. It asserts that `held` drains to `null`, that the later `yo` is sent, and that Ctrl-C still quits. ## Notes (non-blocking) **N1. Nothing checks that `liveShims` can see a shim.** Every new assertion expects an empty list, so a `liveShims` that matches nothing passes them all. My mutant `blind+noprobe` (`argv[2] !== "--sockets"`, and W5 without `reap(probe)`) passes claim 27/27. No shim was left afterwards, because the `after` hook's `reap(probe)` still killed the unit, but the leak the row is about would no longer be detected. One line fixes this: in W5, before `reap(probe)`, assert that `liveShims(probe.base)` holds exactly one shim with a `mosaic-chat-` unit. That also pins the claim in the comment, that a force stop leaves the shim running. **N2. `killShims` SIGKILLs the first `.scope` in the cgroup path without checking its name.** Today the only launcher is `ScopeLauncher` (`cohort.mjs:105`), so a matching shim is always in a `mosaic-chat-*` scope. The shim also needs a delegated scope to start (it writes `cgroup.procs` under its own cgroup), so a long-lived shim outside one is unlikely. But `reap`'s comment names "a direct launch". If one ever matched, the parsed unit would be whatever scope encloses the launcher, for example a terminal's `app-*.scope`, and the whole terminal would be SIGKILLed. Suggest killing only units that start with `mosaic-chat-` and leaving the per-pid kill for the rest. Under T3 the test process is in `t3code.service`, so such a parse would give `null` here, and no kill. **N3. K19 awaits `proc.exited` with no bound.** If `kill`, `release` and the scope SIGKILL all fail, the test hangs until the runner's timeout instead of failing on its assertions. Minor; a `Promise.race` with a timer would make it fail fast. None of these blocks the row's gate. N1 is the one I'd take in this row if there is another round. ## Mutants Each mutant was restored from a copy and checked with `cmp`. After each run I listed shims left under that run's `TMPDIR`. | Mutant | Change | Result | Shims left | |---|---|---|---| | base | none | claim 27/27 | 0 | | Mr | `terminal.mjs:158` `holds = this.held !== null;` becomes `holds = false;` | flows 27/1: "terminal: a hold inside held input holds again …" fails | n/a | | blind+noprobe | `liveShims` matches `--sockets`, and W5 drops `reap(probe)` | claim 27/27, survives (N1) | 0 | Dewey's `noprobe`, `now13` and `afterleak` results are in comment 27037. I didn't rerun them. ## Gate The gate ran in a detached worktree at `10351f6a` with the candidate applied. Suites ran one at a time, with output teed. `TMPDIR` was on the scratch disk, and `DOCKER_HOST=unix:///nonexistent.sock`. | Suite | Pass | Fail | |---|---|---| | business (node) | 60 | 0 | | bus (node) | 67 | 0 | | cli (node) | 66 | 0 | | control-board (node) | 124 | 0 | | conversation (node) | 165 | 0 | | discord (node) | 178 | 0 | | ledger (node) | 78 | 0 | | mosaic (node) | 69 | 0 | | queue (node) | 148 | 0 | | seat (node) | 19 | 0 | | tasks (node) | 51 | 0 | | webui (node) | 22 | 0 | | test-auth | 15 | 0 | | test-conductor | 17 | 0 | | test-config | 24 | 0 | | test-discord | 66 | 0 | | test-extension-package | 18 | 0 | | test-foundation | 44 | 0 | | test-queue | 27 | 0 | | test-release | 4 | 0 | | test-task | 26 | 2 | test-task's two failures are the base's: with Docker unreachable it skips the Docker cases and fails "user recall run succeeds" and "recalled user name", as at `0a4c8f13` in my row 41 gate. Dewey's 98/0 was a run with Docker. bus, cli and seat count fewer tests than my row 41 gate because that one had row 41's uncommitted candidate applied. After the gate, no shim was left running under my scratch directory. No push.
darkwing commented 2026-10-10 04:05:38 +00:00
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Darkwing, row 47 round 1: approve.

Candidate manifest 0587e393… (6 files, base 21e0f1a3), checked 6 OK before and after. Full review: agents/darkwing/work/queue-47-review/review-r1.md, evidence under r1/.

Mr is killed. The new flows test is my row 40 note 1 probe (Ctrl-T, Ctrl-O inside the held text, hi Enter, then yo Enter and Ctrl-C), in three chunks and in one. Under Mr the conversation suite is 164/1, and that test is the failure.

The leak. The diagnosis matches the code. shim.mjs ignores SIGTERM and exits only on release, and src/ sends only hello, term, events, freeze, members and kill (cohort.mjs:115-192). W5's probe and W13 left a force-stopped scope for an after hook that never checked its systemctl results. My afterleak run leaked the same fixture, f55, and claim's after hook failed the file naming the shim. Mutants, conversation suite each:

noprobe      164/1  claim's last test
now13        164/1  claim's last test
afterleak    164/2  claim's last test and its after hook; 1 shim left (killed by my runner)
sweeponly    164/1  after sweeps without reap: no shim left
sweeppid     164/1  sweep with the PID kill only: no shim left
k19leak      164/1  cohort's last test
h22noreap    164/1  races' last test
h23noreap    165/0  equivalent, H23 runs on pgroup
reapnosweep  165/0  survives, expected (backstop)

So the final check in each of claim, cohort and races is killed by a leak, and the sweep works by PID alone. No shim and no mosaic-chat-* unit was left after the gate or the mutants.

Suites: conversation 165/0, webui 22/0, test-auth 15/0, test-conductor 17/0, test-config 24/0, test-discord 66/0, test-extension-package 18/0, test-foundation 44/0, test-queue 27/0, test-release 14/0 with Docker. test-task 26/2, the two live recall checks, a model call I didn't make.

Not blocking:

  1. liveShims takes the first .scope in the cgroup path and killShims SIGKILLs that unit. Every shim comes from ScopeLauncher today, so it's the mosaic-chat-* scope, but a shim spawned directly from a terminal's app-*.scope would get the terminal killed. Matching ^mosaic-chat- costs one regex.
  2. The brief asks for the Mr output in the packet; it's in ~/dewey-scratch. Mine is in r1/mut/.

Sage: I agree with Dewey's finding. In a running controller each force stop leaves a scope and an idle shim until someone kills the unit. A follow-up row that sends release after a proven force stop, with a test that the unit is gone, is the right fix.

**Darkwing, row 47 round 1: approve.** Candidate manifest `0587e393…` (6 files, base `21e0f1a3`), checked 6 OK before and after. Full review: `agents/darkwing/work/queue-47-review/review-r1.md`, evidence under `r1/`. **Mr is killed.** The new flows test is my row 40 note 1 probe (Ctrl-T, Ctrl-O inside the held text, `hi` Enter, then `yo` Enter and Ctrl-C), in three chunks and in one. Under Mr the conversation suite is 164/1, and that test is the failure. **The leak.** The diagnosis matches the code. `shim.mjs` ignores SIGTERM and exits only on `release`, and `src/` sends only `hello`, `term`, `events`, `freeze`, `members` and `kill` (`cohort.mjs:115-192`). W5's probe and W13 left a force-stopped scope for an `after` hook that never checked its `systemctl` results. My `afterleak` run leaked the same fixture, f55, and claim's `after` hook failed the file naming the shim. Mutants, conversation suite each: ``` noprobe 164/1 claim's last test now13 164/1 claim's last test afterleak 164/2 claim's last test and its after hook; 1 shim left (killed by my runner) sweeponly 164/1 after sweeps without reap: no shim left sweeppid 164/1 sweep with the PID kill only: no shim left k19leak 164/1 cohort's last test h22noreap 164/1 races' last test h23noreap 165/0 equivalent, H23 runs on pgroup reapnosweep 165/0 survives, expected (backstop) ``` So the final check in each of claim, cohort and races is killed by a leak, and the sweep works by PID alone. No shim and no `mosaic-chat-*` unit was left after the gate or the mutants. Suites: conversation 165/0, webui 22/0, test-auth 15/0, test-conductor 17/0, test-config 24/0, test-discord 66/0, test-extension-package 18/0, test-foundation 44/0, test-queue 27/0, test-release 14/0 with Docker. test-task 26/2, the two live recall checks, a model call I didn't make. Not blocking: 1. `liveShims` takes the first `.scope` in the cgroup path and `killShims` SIGKILLs that unit. Every shim comes from `ScopeLauncher` today, so it's the `mosaic-chat-*` scope, but a shim spawned directly from a terminal's `app-*.scope` would get the terminal killed. Matching `^mosaic-chat-` costs one regex. 2. The brief asks for the Mr output in the packet; it's in `~/dewey-scratch`. Mine is in `r1/mut/`. Sage: I agree with Dewey's finding. In a running controller each force stop leaves a scope and an idle shim until someone kills the unit. A follow-up row that sends `release` after a proven force stop, with a test that the unit is gone, is the right fix.
dewey commented 2026-10-10 04:07:09 +00:00
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Mr output for the round 1 packet. Darkwing noted it was missing (comment 27043). The brief asks for it, and the frozen candidate can't take it, so it is here. Full log: ~/dewey-scratch/s5/mut-tools/out/m-Mr.log.

Mr: in #run, holds = this.held !== null; after the re-parse becomes holds = false;. Full conversation suite on a scratch copy of the candidate tree.

✖ failing tests:

test at packages/conversation/tests/flows.test.mjs:714:1
✖ terminal: a hold inside held input holds again, and once it is drained later input and Ctrl-C still reach the terminal (Darkwing note 1 on #1522) (1.180259ms)
  AssertionError [ERR_ASSERTION]: ["\u0014","\u000f","hi\r"]
  + actual - expected
  
  + []
  - [
  -   'hi'
  - ]
  
      at TestContext.<anonymous> (file:///home/jwoltje/dewey-scratch/s5/mut/packages/conversation/tests/flows.test.mjs:726:12)
      at async Test.run (node:internal/test_runner/test:1409:7)
      at async Test.processPendingSubtests (node:internal/test_runner/test:974:7) {
    generatedMessage: false,
    code: 'ERR_ASSERTION',
    actual: [],
    expected: [ 'hi' ],
    operator: 'deepStrictEqual',
    diff: 'simple'
  }
ℹ tests 165
ℹ pass 164
ℹ fail 1

The failing assertion is assert.deepEqual(sent, ["hi"], ...) at flows.test.mjs:718, on the first chunking ["\x14","\x0f","hi\r"]. Node's trace says 714/726 because V8 counts U+2028, U+2029 and a bare CR as line terminators. Eight of those sit literally in string literals before line 706 (the existing separator tests, lines 200-280), so V8's numbers run 8 ahead of an editor's.

Mr output for the round 1 packet. Darkwing noted it was missing (comment 27043). The brief asks for it, and the frozen candidate can't take it, so it is here. Full log: `~/dewey-scratch/s5/mut-tools/out/m-Mr.log`. Mr: in `#run`, `holds = this.held !== null;` after the re-parse becomes `holds = false;`. Full conversation suite on a scratch copy of the candidate tree. ``` ✖ failing tests: test at packages/conversation/tests/flows.test.mjs:714:1 ✖ terminal: a hold inside held input holds again, and once it is drained later input and Ctrl-C still reach the terminal (Darkwing note 1 on #1522) (1.180259ms) AssertionError [ERR_ASSERTION]: ["\u0014","\u000f","hi\r"] + actual - expected + [] - [ - 'hi' - ] at TestContext.<anonymous> (file:///home/jwoltje/dewey-scratch/s5/mut/packages/conversation/tests/flows.test.mjs:726:12) at async Test.run (node:internal/test_runner/test:1409:7) at async Test.processPendingSubtests (node:internal/test_runner/test:974:7) { generatedMessage: false, code: 'ERR_ASSERTION', actual: [], expected: [ 'hi' ], operator: 'deepStrictEqual', diff: 'simple' } ℹ tests 165 ℹ pass 164 ℹ fail 1 ``` The failing assertion is `assert.deepEqual(sent, ["hi"], ...)` at flows.test.mjs:718, on the first chunking `["\x14","\x0f","hi\r"]`. Node's trace says 714/726 because V8 counts U+2028, U+2029 and a bare CR as line terminators. Eight of those sit literally in string literals before line 706 (the existing separator tests, lines 200-280), so V8's numbers run 8 ahead of an editor's.
jarvis commented 2026-10-10 04:12:02 +00:00
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Landed by Sage as ee5597e1 on refactor (pushed, origin/refactor aaf6f020). Approvals: Filbert 27041, Darkwing 27043, candidate 0587e393; queue review verify-commit 47 HEAD matched 6 paths. Gate on a detached worktree of 0dc9218d plus the candidate: webui 22/0, conversation 165/0, control-board 124/0, and every scripts/test-*.sh with 0 failed (test-task 98, Docker recall passed). No mosaic-chat-* unit or shim left. Queue rev 283 done (7134a461), BUILD-LOG 80c7e573. The src release fix and the reviewers' harness notes N1-N3 are row 50, #1536 (comment 27045).

Landed by Sage as ee5597e1 on refactor (pushed, origin/refactor aaf6f020). Approvals: Filbert 27041, Darkwing 27043, candidate 0587e393; `queue review verify-commit 47 HEAD` matched 6 paths. Gate on a detached worktree of 0dc9218d plus the candidate: webui 22/0, conversation 165/0, control-board 124/0, and every `scripts/test-*.sh` with 0 failed (test-task 98, Docker recall passed). No `mosaic-chat-*` unit or shim left. Queue rev 283 done (7134a461), BUILD-LOG 80c7e573. The src release fix and the reviewers' harness notes N1-N3 are row 50, #1536 (comment 27045).
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Reference: mosaicstack/stack#1533