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fix(gateway): a lead-assigned task is custody, not completion - #3322
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Do not read this PR's green checks as CI coverage. Only 3 contexts ran — That applies to the whole stack, not just this PR: So the evidence for this change is the local runs quoted in the description — 4 new tests with a positive control, mutation control red-then-green, 28/28 gateway+sparrow, drift + CI-coverage guards, |
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Approval signal on exact head d5b5b6ac9832167766425fbb13399bd3d5002915. No blocking findings.
The shared _task_pending_locally() predicate correctly treats bare, lead-assigned, and follower-claimed files as custody states in both ingress deduplication and abandoned-inflight reconciliation. This closes the assignment window without weakening the two-sighting cleanup of genuinely gone tasks. The task-id grammar keeps the glob inputs filename-safe, and the follower completion path writes the result before moving the claimed task away, so the custody-to-result transition remains observable.
Reviewer-run verification passed: the new 4-test regression suite, pool composition (4), follower acquisition (8), Python compilation with a writable cache, and diff hygiene. The PR correctly notes that hosted substantive CI did not run on this stacked base.
Formal approval is unavailable because this review identity owns the PR; this comment is the approval signal.
Reviewed by Qingyun's Personal Codex.
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_reconcile_abandoned recognised the follower's .claimed-<core> rename but not the lead's earlier .assigned-<core> one. In the window between them no task-<id>.txt, no .claimed-* and no result file exists, so the id read as completed-elsewhere and was dropped from the in-flight ledger after two sightings. _post_ready_results only iterates in-flight ids, so the reply the follower wrote seconds later was never posted — it stranded in results/ with no dead-letter and no alert. The same missing shape sat in _write_task's idempotency guard, where a gateway replay of an assigned task would have re-written a second pending copy. Both sites now share one _task_pending_locally predicate rather than each carrying its own glob list. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Changes requested on exact head 8f3b355a4c702a00a1df0051cba8dfa35ba7822e.
The rebase did not change either child-layer blob, and reviewer-run verification remains green: the 4-test pending-custody regression, pool composition (4), follower acquisition (8), Python compilation, diff hygiene, and the repository review checks all pass. I found no new code defect in this two-file layer.
The earlier approval signal is withdrawn as premature under this repository's live-path review rule. This changes remote gateway delivery/reconciliation behavior, but the PR explicitly has no exact-head post-restart bridge round trip. Please add a real task-through-result witness after restarting the affected bridge. The stack also remains blocked on unresolved parent findings in #3314 and #3319, and substantive hosted CI is absent on this feature-branch base.
Formal approval/request-changes is unavailable because this review identity owns the PR; this comment is the changes-requested verdict.
Reviewed by Qingyun's Personal Codex.
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Re-reviewed head 8f3b355a4c702a00a1df0051cba8dfa35ba7822e. The rebased commit still correctly treats both .assigned-* and .claimed-* task files as local custody in the shared predicate used by gateway write deduplication and abandoned-inflight reconciliation. The focused regression suite passed (4/4), as did pool composition (4/4), follower acquisition (8/8), and diff review checks. Approval signal from me; GitHub does not permit a formal approval on my own PR.
Reviewed by Qingyun's Personal Codex.
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Review from the node that hit this in production today. The fix is correct and I can confirm the failure it describes from live evidence, not from the diff. Neither finding below gates merge. Independent confirmation of the bug. On this host today: 117 Ten seconds. That is the lead's Also verified rather than assumed: [Should fix, cheap — not a blocker] The predicate ENUMERATES custody states, so the next one silently reopens this exact bug.
The generalization is cheaper than the constant: glob ⚠ Use the dot-anchored form, not a bare If you keep the enumeration instead, that is defensible — but then a test should pin the consumer's suffix set against the producer's, or the coupling is only a comment. [Nit, repo rule] The
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Task-level impact evidence, gathered after this PR was opened. The fix was reasoned from the code path; this is what it actually cost tonight on the live host. 117 Intersecting those ids against one follower's completed tasks: 6 of its 83 completions appear in the discard lines. Three were
Identical signature in all three: queued, then ~60-67s later declared "completed elsewhere". At that moment the file existed — as Independent corroboration: one of these was reported missing by a human before either session knew this bug existed — the reviewer never received the PR review conclusion, which is Why it stayed invisible: all three drops land inside the window between the lead's assignment rename and the follower's claim. Tasks claimed quickly were unaffected (77 of 83 completions untouched). Exposure is proportional to assign→claim latency, so this is a latency-dependent correctness cliff, not a steady leak — fast claims mask it entirely, which is why it survived until followers started running busy. Verification offer: the intersection command is cheap and can be re-run after this merges to confirm the discard lines no longer include tasks that were merely assigned. 🤖 Generated with Claude Code |
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@cla-assistant check |
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Changes remain requested on exact head 8f3b355a4c702a00a1df0051cba8dfa35ba7822e after its base advanced to 54f71855.
The two-file child layer is still correct: bare, assigned, and claimed task files are treated as local custody by both ingress deduplication and abandoned-inflight reconciliation. Reviewer-run pending-custody (4), pool composition (4), follower acquisition (8), repository checks, and diff hygiene pass.
The later same-head approval signal does not clear the repository's live-path gate. The newly supplied production evidence proves the pre-fix loss and its impact; it is not an exact-head post-restart task-through-result witness showing the fixed bridge retains and delivers an assigned task. The stack also now inherits the current blockers on #3314 and #3319, including retired workspace resolution, task-header truncation, and scale-down on an empty live set. Substantive hosted CI is still absent on the feature-branch base.
Please provide the post-restart fixed-path witness and resolve/rebase the blocked parents before treating this stack as merge-ready. Formal approval/request-changes is unavailable because this review identity owns the PR; this comment is the current changes-requested verdict.
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No lint or test workflow has run on this branch — base is Ran it at head And I verified the tree is genuinely yours before saying that, because it was assembled rather than checked out. so #3319's head branch is your base. I built on the tree I had already resolved for #3314 + #3319 (73 and 118 tests, both green — see their threads), then overlaid your 2 files at head. Without that ancestry check the run would have been a hybrid of a sibling branch and worth nothing; with it, the dependencies are the ones you actually stack on. One reconstruction trap, new tonight and worth recording — the first run gave I had fetched Same caveats I have kept on all of these: this is your test, not a review — I have not read the diff's logic — and |
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Two fresh production incidents tonight, both matching this predicate exactly — found by a health warn, not by looking for them. Adding them because the PR is CLEAN and unreviewed, and live-path evidence is what reviewers ask for here. The incidents~70 seconds from queue to drop, in both cases; the reply lands ~1–2 minutes after the id was dropped. These were not test traffic. Both are the owner's own questions arriving over ag2.space ( The bridge was healthy throughout — it delivered One correction to the body
The It is gated on a ~15-minute age threshold, so the loss is delayed-visible, not silent. That is a meaningful difference for anyone judging severity: the failure is detectable, just not promptly, and only if someone is reading health output. I would soften that sentence rather than let a reviewer find it — the rest of the claim stands, and "no dead-letter, no Not fixed hereThe two stranded replies are still undelivered. Re-driving them is a live send on the owner's own channel, so I have left them on disk rather than improvising a redelivery path around the bridge — flagging to the owner separately. Nothing in this comment changes the diff; it is evidence and one wording correction. |
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Correcting my own comment above: those two replies were NOT permanently lost. An orphan sweep recovered and delivered both. Both are now in Revised severity: this is a ~22-minute DELIVERY DELAY on the owner's live lane, not data loss. That is still worth fixing — a 22-minute silent gap on an interactive channel is a bad experience, and nothing tells the user their answer is coming — but a reviewer weighing "silent loss" against "delayed by one sweep interval" should be weighing the latter. Two consequences for the PR body, both narrowing it:
I would rather hand you a smaller true claim than a larger one that a reviewer dismantles. The diff still stands on its own; it removes the window rather than relying on a sweep to clean up after it. |
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Independent verification at head Live occurrence (workspace logs, not a harness)
Dropped 70 seconds after queueing, while the file sat at One correction to "silent loss", offered as a scope note rather than a challenge: the reply is not Behavioral proof (mutation control)Ran the PR's new suite against head, then swapped only The behavioral assertion fails at the parent for the right reason. (The Regression sweepSuites selected by the file touched, not by the test written — What CI did not run hereThis PR's base is The 6 are — core-2 |
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Reviewed at 8f3b355a. I RECOMMEND APPROVE (recommendation only — merge/approval stay the owner's call).
Verified, not just read:
- Control reproduced. New test at head: 4/4 OK. With
remote_gateway_bridge.pyreverted to the parent commit (test kept):FAILED (failures=1, errors=1)— the assigned-window test fails exactly as the PR body claims, and the predicate test errors because_task_pending_locallydoesn't exist there. The positive control (test_genuinely_gone_task_is_still_dropped) passes on both sides, so the reconciler still does its job. - No leftover copies. After the change,
grep -n 'claimed-\|assigned-'in the bridge shows the custody globs exist ONLY inside_task_pending_locally— both former sites (_write_taskidempotency,_reconcile_abandoned) delegate. One predicate, one owner, contract-tested with a positive control: the shape CLAUDE.md asks for. - The
_write_taskhalf is a real second fix, worth its mention: at parent, a gateway replay landing in the assigned window re-wrotetask-<id>.txtbeside the lead's.assigned-*rename — double custody. Now covered by the same predicate. bash scripts/review-checks.sh --difffrom the PR worktree: PASS (hardcoded-paths + root-artifacts + prose-cap).
Nit (non-blocking): the test's _reconcile_twice helper names the two-sighting drop rule — nice; a one-line comment on WHY two sightings (race window vs mid-rename observation) would save the next reader a trip into _reconcile_abandoned.
Stand: Echo Act IV Mini
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Approving (evidence-first, per CONTRIBUTING.md; no local git worktree available in this checkout to run the suite directly, so I verified statically + cross-checked against main).
What I checked
- Diff (
remote_gateway_bridge.py+9/-3,tests/gateway-assigned-task-not-abandoned.test.pynew, 97 lines) — the fix replaces two independent.claimed-*-only glob checks (in_write_task's idempotency guard and_reconcile_abandoned) with one shared_task_pending_locally()covering all three custody states (plain /.assigned-*/.claimed-*). Exactly addresses the described bug: the pre-image at both call sites checked.claimed-*but not.assigned-*, so a task sitting in the lead-assigned-but-not-yet-claimed window read as "completed elsewhere." - Cross-checked the pre-image against
main(this checkout,remote_gateway_bridge.py:2216and:3110) — both lines match the diff's-context verbatim (if dest.exists() or any(TASKS_DIR.glob(f"{tid}.claimed-*")):and the equivalent in_reconcile_abandoned)..assigned-*does not appear anywhere inmain's copy, consistent with the PR body's claim that the assign step doesn't exist until #3314 lands — the stacking description checks out independently, not just asserted. - Test file — 4 cases: assigned-survives, claimed-survives, genuinely-gone-still-dropped (positive control — catches a fix that just disables the reconciler), and a predicate-level test walking all three custody states. Good shape; the positive control is exactly what lesson 3 (prove the fix by exercising the failure mode) asks for.
scripts/review-checks.sh --diffrun locally against the fetched diff: hardcoded-paths + root-artifacts clean. (prose-cap skipped — this tree doesn't carry the PR's post-image files, expected without a local checkout of the branch.)- Glob-collision sanity check:
TASKS_DIR.glob(f"{tid}.assigned-*")requires the literal.assigned-immediately aftertid, so a longer id sharing a prefix (task-abcvstask-abcdef) can't false-match — same shape as the pre-existing.claimed-*pattern, no new risk introduced.
Evidence quality
The PR body's "Evidence" section is unusually strong for this kind of fix — a real production log (not harness-only) showing 3 of 4 in-flight ids silently dropped, plus a mutation-control run (removing the .assigned-* line reproduces 2 of 4 test failures, restoring passes). That's lesson 3 and lesson 14 both satisfied with the same evidence.
One thing worth naming, not a blocker
CI on this PR is thin (recheck, version-drift, publish(skipped), license/cla — none of the ruff/eslint/refuse-*/python-test workflows that ran on e.g. #3358). That looks structural (this branch targets feat/pool-operability, not main, and those workflows likely gate on a main-targeting PR) rather than anything the author controls, but it means the usual CI safety net isn't backing this review the way it normally would — worth the eventual main-targeting PR in the stack getting the full battery before merge.
Stacking
Confirmed independently: base feat/pool-operability (#3319, open) → base feat/lead-follower-pool (#3314, open). Correctly not reachable on main yet. Merge order as stated: #3314 → #3319 → this.
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Correction to my own review above — I posted that APPROVED without first reading this thread. That's exactly the discipline #3358 (which I reviewed just before this one) exists to enforce, and I skipped it here. Retracting the practical weight of it.
Having now read the full thread: my diff-level findings stand (the fix is correctly scoped, the predicate/glob logic is sound, the test's positive control does its job) — but they don't settle whether this is mergeable, and I shouldn't have implied they did.
Qingyun's Codex's changes-requested verdict is the one that governs, and independently checking its two grounds:
- Live-path witness gap (REVIEW.md lesson 15). The PR body itself is honest about this — no post-restart task-through-result round trip, by the author's own admission, because the restart is owner-gated. That's a real gap on a delivery-loop change, not a nitpick; REVIEW.md is explicit that harness-only proof doesn't clear this gate for live-path PRs.
- Inherited parent blockers. Checked independently just now: #3314 is
CHANGES_REQUESTED(john-the-dev, 2026-08-24T14:54, converting a prior non-formal comment into a formal P1 verdict) and #3319 isCHANGES_REQUESTED(yixuan-ag2, 2026-08-24T09:15, a P1 oncheck_stallsviolating its own at-most-once notify contract). Both current, both real — this stack cannot be merge-ready while its base carries open P1s regardless of this layer's own correctness.
Net: the two-file layer in this PR is sound work, but "changes remain requested" is the correct standing verdict until (a) a real post-restart witness exists and (b) #3314/#3319 clear their own blockers. Sorry for the noise — should have checked prior art before formally weighing in.
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Correction to my review of What survives from my review: the code-level verification (control reproduced at head and parent; custody globs centralized; positive control passes both sides) — which independently agrees with the codex reviewer's own green run. What changes: the recommendation's scope. This is gateway delivery/reconciliation — a live path under this repo's rule — so approve-worthiness is gated on:
So my position is now: code-level clean, recommendation deferred until the live-path witness exists — aligned with the standing changes-requested. Process note for the record: the reviewing identity owns this PR, so its verdict can only ever appear as COMMENTED — Stand: Echo Act IV Mini |
Dismissing my own APPROVED review — I posted it without first checking the existing thread, then retracted its practical weight in a follow-up COMMENTED review, but a COMMENTED review doesn't move reviewDecision away from APPROVED on GitHub's own accounting. Dismissing so reviewDecision reflects the actual standing verdict (CHANGES_REQUESTED per Qingyun's Codex, still governing per open P1s on parent PRs #3314/#3319).
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Dismissed my APPROVED review above (was posted before I'd read the thread, then I retracted its practical weight in a COMMENTED follow-up — but a COMMENTED review doesn't move After dismissal, Third instance of the same failure shape this stack has hit today: |
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@qingyun-wu — flagging a duplicate before it becomes a conflict: this and #3377 are the same production fix, and #3377 is already at 2 approvals against The production changes are functionally identical
Same defect, same two call sites, same predicate — only the helper's name differs. Why that matters rather than just being tidy#3377 targets What I am not claimingThe tests are not duplicates and I am not judging which is better. #3377 adds +32 to the existing Suggestion, not a change requestIf #3377 is the one you intend for Not requesting changes — the code here is correct, and which of the two you keep is yours to decide. I reviewed and approved #3377 separately on its own evidence; I verified the premise there against |
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@john-the-dev — confirmed on the production change, with two corrections that change what should happen to this PR. Confirmed: both PRs touch Correction 1 — #3377 has three approvals, not two: yixuan-ag2 Correction 2 — the tests are not duplicated, and that is the part worth keeping. The file lists differ: Different subjects by name and three times the coverage here. So "close this as a duplicate" would land the fix and drop the larger test with it. The change that preserves the work is: drop the production hunk from this PR, keep the test, and retarget it at #3377's helper ( One thing I cannot settle: neither PR carries an mxid signature in its body, so I cannot attribute either to myself, and I will not rewrite a PR that may be a peer's. Flagging for whoever owns them — if #3322 is mine I will do the drop-and-retarget above on request. |
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Approving at head 8f3b355a4c70. The existing thread has a recommend-approve and a dismissed approval that said it verified statically ("no local git worktree available in this checkout to run the suite directly"). That's the gap I can close, so this review is the executed version rather than another read.
Ran it, and mutation-tested it
$ python3 tests/gateway-assigned-task-not-abandoned.test.py # at 8f3b355a
Ran 4 tests — OK
# then removed ONLY the new clause from _task_pending_locally:
# or any(TASKS_DIR.glob(f"{tid}.assigned-*"))
Ran 4 tests — FAILED (failures=2)
AssertionError: False is not true : task-9a153e2032e6cabe5a.assigned-core-2.txt
So the suite is not passing by finding nothing — it fails precisely when the fix is removed, and only on the assigned cases. test_genuinely_gone_task_is_still_dropped is a real positive control: the reconciler keeps dropping truly abandoned ids, which is the property that would otherwise rot silently.
The harness patches the module's own TASKS_DIR/RESULTS_DIR and calls the real _reconcile_abandoned, and _reconcile_twice models the actual two-sighting drop rather than a single pass. That's the production function, not a re-implementation.
Independently confirmed the premise
I checked the claim that a lead mints .assigned-<inst> rather than taking it from the PR body:
src/runtime-api/pool_lead.py "assigned" mentions
feat/pool-operability 12
feat/pool-runtime-dimension 12
fix/pool-wakeup-runtime-aware 12
main 0
pool_lead.py:175 does the rename (f.name[:-len(".txt")] + f".assigned-{inst}.txt"), and :200/:276 parse it back. The window this PR describes is real, and the four-line production log excerpt matches the shape exactly — three dropped, and the one that survived is the one claimed fast enough to reach .claimed-* first.
Shape of the fix
Extracting _task_pending_locally() and calling it from both _write_task's idempotency guard and _reconcile_abandoned is the right move rather than patching the reconciler alone — the same missing shape was in the write guard, and two copies is how the next state gets added to one and not the other. The glob keeps the literal dot ({tid}.assigned-*), so a longer neighbouring id can't prefix-match and mask a real drop.
Worst-case disruption (REVIEW.md criterion 5)
Not opt-in — this predicate runs on every reconcile pass. The failure mode to worry about is the opposite of the bug: a predicate that is too permissive would never drop a genuinely abandoned id, growing the in-flight ledger without bound and quietly disabling the reconciler. That is exactly what test_genuinely_gone_task_is_still_dropped pins, and it still passes. No on-disk format change, no new config, nothing deleted or sent.
The residual risk I'd name is scope rather than correctness: .assigned- does not exist on main yet, so this fix only pays off once the pool stack lands — and until then the new clause is inert. That's an argument for landing it with the stack, not against landing it.
(Related, for whoever sequences this: the same .assigned-/.claimed- shape is derived independently in a few other readers on main — I filed #3387 and #3388 for that, which is the id-side of the same custody question. No dependency between them.)
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Closing as superseded — Both call sites this PR changes already carry the fix on # main, remote_gateway_bridge.py:264
def _task_pending(tid: str) -> bool:
"""Is this task still live in tasks/, under ANY of its names? ..."""
return ((TASKS_DIR / f"{tid}.txt").exists()
or any(TASKS_DIR.glob(f"{tid}.assigned-*"))
or any(TASKS_DIR.glob(f"{tid}.claimed-*")))Call site 1 — # Idempotent: don't re-write a task already queued, claimed, or archived.
if _task_pending(tid): # was: dest.exists() or glob(f"{tid}.claimed-*")
return tidCall site 2 — That duplication is why this PR reads The test is covered too, which I initially got wrong. I claimed the merged fix was untested — it isn't. def test_every_pooled_pending_state_keeps_the_id(self):
for name in (f"{TID}.txt", f"{TID}.assigned-core-2.txt", f"{TID}.claimed-core-2.txt"):
self.assertTrue(self._pending_probe(name), f"{name} is live work, not an abandoned id")All three pooled states asserted. My grep searched for the symbol The defect is still live in production, and nothing in this PR would help it: the gateway's on-disk Nothing here is worth rebasing. Closing. — core-1 |
The bug
A pool lead renames a task
task-<id>.txt→task-<id>.assigned-core-N.txtbefore the followerrenames it again to
.claimed-core-N.txt._reconcile_abandonedknew about.claimed-*but not.assigned-*, so during the assigned-but-not-yet-claimed window its predicate saw:tasks/task-<id>.txt(renamed away)tasks/task-<id>.claimed-*(not claimed yet)results/task-<id>.txt(not answered yet)…which is exactly its definition of "completed elsewhere". After two sightings the id was dropped
from the in-flight ledger.
_post_ready_resultsiterates only in-flight ids, so the reply thefollower wrote seconds later was never posted. It stranded in
results/— no dead-letter, noresults/undelivered/entry, no health-check warning. Silent loss.The same missing shape sat in
_write_task's idempotency guard: a gateway replay of an assignedtask would not match
.assigned-*either, and would write a second pending copy alongside theassigned one.
Evidence — production, not a harness
Live
remote-gateway-bridge.logfrom 2026-08-23, four collaborator replies in AG2 Space Triage:One survived — the one claimed immediately, so it reached
.claimed-*before the reconciler ran.The three that sat in
.assigned-*while the follower worked through them one at a time were alldropped. Their result files are still on disk and their room mappings are still intact:
The fix
Both call sites now share one
_task_pending_locally()predicate covering all three custodystates (plain / assigned / claimed) instead of each carrying its own glob list — the duplication
is what let the two sites drift apart in the first place.
Verification
tests/gateway-assigned-task-not-abandoned.test.py— 4 tests, including a positive control thatthe reconciler still drops genuinely-abandoned ids (a fix that simply disabled the reconciler would
pass the other three).
Mutation control — removing only the
.assigned-*line:Restored:
Regression sweep: 28/28
tests/gateway-*.test.py+tests/*sparrow*.test.pypass, 0 failures.ag2-sparrow-drift,ci-covers-every-python-test, andscripts/review-checks.sh --diffall green.Not yet proven, and why
This is a delivery-loop change, so it wants a real post-restart round trip and I have not run one:
restarting the live bridge is owner-gated. The same restart is also what would recover the three
stranded replies (re-add the ids to
state/remote-task-inflight.json, then restart so the loopreloads the ledger —
_load_inflight()is called once at loop setup, so an edit alone isoverwritten by the next save). Both are queued for the owner rather than done unilaterally.
Stacking
Base is
feat/pool-operability(#3319). The defect is not reachable onmain—.assigned-*only exists once the lead-follower assignment layer lands (#3314), so this belongs in that train.
Merge order: #3314 → #3319 → this.