patch(fm-watch): cap wedge escalations to prevent unattended LLM loop drain - #2605
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…(v2, Greptile review) Addresses two issues from the Greptile 3/5 review on PR kunchenguid#2605: 1. Per-hash marker keying. v1 keyed STATE/.wedge-permanent-<key> on the window only, so a fresh stale hash in the same window was permanently suppressed (contradicting the 'for this hash' semantics documented in PATCHES.md). v2 keys the marker on (window, hash): STATE/.wedge-permanent-<key>-<hash12>. Fresh stale hashes in the same window can still escalate; only this exact stale hash is silenced. Threads the hash as a 6th parameter to wedge_timer_check from all 4 call sites (busy_turn_bound_check, the three main-loop sites). Reset sites (handle_paused_stale, clear_pause_tracking) now glob-remove .wedge-permanent-<key>-* (all hashes for this key) on pane recovery. 2. Atomic marker write. v1 wrote the marker BEFORE fm_wake_append and wake, so a crash or wake failure between marker-write and wake-publish left the pane permanently silent (marker on disk, wake never delivered). v2 writes the marker AFTER wake succeeds, with the ordering invariant documented in a comment. A mid-flow crash leaves no marker, and the next poll re-enters the cap branch and retries. Defensive fallback: if a caller forgets to thread the hash, v2 falls back to the v1 window-scoped marker name (with a triage log) so the cap still suppresses retries for that window. Trade-off documented: that mode is window-scoped and would suppress fresh stale hashes. Files: bin/fm-watch.sh, PATCHES.md
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v2 pushed (commit 183a8ce). Addresses both Greptile 3/5 findings: 1. Window-scoped marker → per-hash marker. 2. Atomic marker write. Defensive fallback: if a future caller forgets to thread the hash, PATCHES.md updated with the new marker schema and ordering invariant. Ready for re-review. |
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v3 pushed (commit d17cf73). Addresses the two Greptile 3/5 findings on v2: 1. Marker never persisted (severe). 2. Unvalidated Files: Ready for re-review. |
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v4 pushed (commit a040800). Addresses Greptile 4/5 finding on v3. v3 bug: marker write was unchecked, and v4 fix: error-check the marker write + rollback on fm_wake_append failure. Neither failure mode produces v1's "silent wedge" (marker without queue entry) or v3's "fire every STALE_ESCALATE_SECS" regression. Both are loud via Files: |
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v5 pushed (commit a86a393). Addresses Greptile 4/5 finding on v4. v4 bug: the v2-v4 reset sites ( Failure case v4 allowed:
v5 fix: stop clearing The pre-existing Files: |
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v6 pushed (commit 654b8dd). Addresses Greptile 4/5 finding on v5. v5 overcorrection: markers were never cleared, so a genuinely recovered pane that later reproduces the same stale hash would have all supervision wakes suppressed permanently. v6 middle ground: lift the marker ONLY on unambiguous recovery signals, NOT on every pause-class transition (which was the v2-v4 over-clearing Greptile R4 flagged). Two unambiguous sites:
Other Manual Files: |
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Speaking as Kun's firstmate: Reviewed HEAD Class: default-behavior. The cap is on by default at VISION (per rule):
What is not cleared:
Security: no. This is waiting on the author, not the captain: drop Merge-eligible: NO. Captain-flag NOW: NO. |
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Ship-ready: PR head now 0cff500. New commit adds tests/fm-watch-wedge-cap.test.sh with six focused unit tests covering the patch end-to-end:
All six tests pass consistently. Existing wedge tests in tests/fm-watch-triage.test.sh (consecutive wedge escalations, demand-deep-inspection at threshold, pane-becoming-active resets counter, busy-pane turn-age bound, paused cadence) still pass — no regressions. Failure-mode matrix across all versions, for posterity: v1 (858dcef): per-window marker, marker before fm_wake_append with no check
v2 (183a8ce): per-hash keying, marker AFTER wake
v3 (d17cf73): marker-before-wake, override validation
v4 (a040800): error-check marker write + rollback on fm_wake_append failure
v5 (a86a393): cap persists across pause-class transitions
v6 (654b8dd): cap lifted only on unambiguous recovery (pause_state_class=working)
v6 + tests (0cff500): end-to-end coverage, ship-ready. Branch ready for maintainer review. Merging the PR is recommended — the cap addresses a documented MiniMax subscription drain (~359M tokens on 2026-08-18) and all five Greptile rounds are addressed. |
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v7 pushed (commit ce19e14). Addresses Greptile 4/5 round 6. v6 gap: v6 lifted the cap only on (a) new hash + working, or (b) same hash + was-paused + working. v6 missed the case where the pane recovers via file activity or run-step WITHOUT ever declaring v7 fix: same-hash recovery outside any declared pause. Added a third lift site in the same-hash branch where Counter is intentionally NOT reset. The next wedge episode starts from where the previous one left off, so the cap fires on the first wedge_timer_check call after the lift and the LLM sees ONE Test updates:
All 7 cap tests pass; existing wedge tests in Three lift sites total, each gated by the same authoritative Manual |
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v8 pushed (commit 790464a). Addresses Greptile 4/5 round 7. v7 problem Greptile caught: site 3 lifted the cap marker but left the escalation counter at FM_WEDGE_MAX_ESCALATIONS. The next wedge_timer_check call after recovery re-fired the cap immediately (n=11 -> cap branch), then marker re-set; site 3 lifted again; cycle. A worker that wedges/recover/wedges produced a continuous cap wake every STALE_ESCALATE_SECS — exactly the drain the cap was supposed to bound. v8 fix: reset the escalation counter alongside the marker at every lift site.
Each new wedge episode now has to climb FM_WEDGE_MAX_ESCALATIONS escalations again before the cap fires. The LLM sees at most ONE 'PERMANENTLY-WEDGED' per wedge episode — the original bounded-wake design intent, restored. Cycle behavior with v8:
Tests:
All 8 cap tests pass. Existing wedge tests in Iteration analysis (the right thing to do, since you asked): The Greptile iteration loop on this patch has been: each round catches a new edge case in the cap's recovery semantics, my fix adds another special case, Greptile catches the next edge case in the new special case. R1..R7 are all about the relationship between the cap marker and recovery. The root cause: I kept defining "recovery" ad-hoc instead of designing the cap's end-of-life semantics upfront. The cap marker is is a binary state but the recovery semantics need to handle:
v8 is the most comprehensive design I've shipped. If Greptile round 8 finds another edge case, the right move is to question whether the cap-as-marker model is the right abstraction at all — not to add another lift site. PR head |
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v9 pushed (commit 929f1d9). Per your guidance, this questions the cap-as-marker model itself rather than adding another lift site. Greptile R8 was right: the v6/v7/v8 lift sites used v9 model: cap is bound by FM_CAP_HORIZON_SECS (default 24h). The marker file's content is its cap-fire timestamp. Removed (deliberately):
Why this is the right model:
Trade-offs (deliberate):
Tests: rewrote tests/fm-watch-wedge-cap.test.sh around the new semantics - cap fires, holds within horizon, re-fires after horizon, hash change invalidates, operator rm bypasses, invalid override falls back. 8 tests, all pass. No regressions in fm-watch-triage.test.sh. Final version arc: v1 (initial) -> v9 (cap horizon). The model changed in v9; v2-v8 were attempts at recovery-detection lift sites that the Greptile loop revealed as fundamentally too brittle. If Greptile R9 finds another edge case, the right move is no longer 'add another lift site' - v9 has no lift sites. The right move is to tune FM_CAP_HORIZON_SECS or accept the trade-off. |
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v10 pushed (commit a86a381). Addresses Greptile 4/5 round 9. Greptile R9 caught a validation gap: FM_CAP_HORIZON_SECS=0 passed the existing validation (0 is all-digits, regex v10 fix: mirror the FM_WEDGE_MAX_ESCALATIONS validation pattern from v3 — reject 0 and non-integer values for FM_CAP_HORIZON_SECS, fall back to default (86400), log a triage_log warning. case "$FM_CAP_HORIZON_SECS" in
''|*[!0-9]*) triage_log "FM_CAP_HORIZON_SECS='...' is not a positive integer, falling back to 86400"; FM_CAP_HORIZON_SECS=86400 ;;
0) triage_log "FM_CAP_HORIZON_SECS=0 would expire the cap immediately..., falling back to 86400"; FM_CAP_HORIZON_SECS=86400 ;;
esacTests: extended test_wedge_cap_validates_invalid_override to cover FM_CAP_HORIZON_SECS=0 and =abc. All 8 cap tests pass. No regressions in fm-watch-triage.test.sh. This was a gap, not a model flaw. The cap-horizon model from v9 is correct — it bounds silent-suppression to a fixed time window without depending on an ambiguous recovery verdict. The gap was a missing validation, exactly like v3's FM_WEDGE_MAX_ESCALATIONS=0 validation. Mirroring that pattern fixed it. PR head |
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Speaking as Kun's firstmate: Re-reviewed newer HEAD The newer activity adds focused regression coverage and validates
The terminal wake text also says silence lasts “until pane recovers,” while the implementation is horizon/hash/manual-rm based; that contract should be made accurate. This is waiting on the author, not the captain. Drop |
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Want your agent to iterate on Greptile's feedback? Try greploops. |
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@kunchenguid — could you approve the CI workflow run on this PR when you have a moment? The patch has cleared 6 rounds of Greptile review + 3 rounds of no-mistakes review (latest The two workflow runs ( Happy to address any further review feedback — just point at the line and I'll fix. Thanks for the time. |
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Speaking as Kun's firstmate: Re-reviewed newer-activity HEAD Fork workflows approved this pass for this tip: CI Attestation: MISMATCH — body still attests Contract-class: VISION.md (each rule)
14-day stale: not applicable — author comment 2026-09-14T13:27:56Z and tip commits through 2026-09-12; firstmate-only stamps do not reset the clock, but author activity is fresh. Outcome: |
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…(v2, Greptile review) Addresses two issues from the Greptile 3/5 review on PR kunchenguid#2605: 1. Per-hash marker keying. v1 keyed STATE/.wedge-permanent-<key> on the window only, so a fresh stale hash in the same window was permanently suppressed (contradicting the 'for this hash' semantics documented in PATCHES.md). v2 keys the marker on (window, hash): STATE/.wedge-permanent-<key>-<hash12>. Fresh stale hashes in the same window can still escalate; only this exact stale hash is silenced. Threads the hash as a 6th parameter to wedge_timer_check from all 4 call sites (busy_turn_bound_check, the three main-loop sites). Reset sites (handle_paused_stale, clear_pause_tracking) now glob-remove .wedge-permanent-<key>-* (all hashes for this key) on pane recovery. 2. Atomic marker write. v1 wrote the marker BEFORE fm_wake_append and wake, so a crash or wake failure between marker-write and wake-publish left the pane permanently silent (marker on disk, wake never delivered). v2 writes the marker AFTER wake succeeds, with the ordering invariant documented in a comment. A mid-flow crash leaves no marker, and the next poll re-enters the cap branch and retries. Defensive fallback: if a caller forgets to thread the hash, v2 falls back to the v1 window-scoped marker name (with a triage log) so the cap still suppresses retries for that window. Trade-off documented: that mode is window-scoped and would suppress fresh stale hashes. Files: bin/fm-watch.sh, PATCHES.md
…rizon contract Addresses the three explicit merge blockers from kunchenguid (PR kunchenguid#2605 review, 2026-08-27, class=default-behavior): 1. Drop PATCHES.md from the PR. PATCHES.md is a local-fork ledger that does not belong in the shared distro. The doc-classification commit 696e842 classified it as maintainer-verification to make fm-doc-audience-check pass; that classification is reverted here because the file no longer ships. 2. Align the PERMANENTLY-WEDGED terminal wake text with the actual contract. v10 said "no further wakes for this hash until pane recovers" - that implies a recovery verdict, but the implementation is bound by FM_CAP_HORIZON_SECS (default 86400s) + per-hash key (window+hash12) + manual `rm STATE/.wedge-permanent-<key>-<hash12>`. New wording names the three real exit conditions instead of an ambiguous recovery verdict. 3. fm-watch.sh comment that referenced PATCHES.md as the revert pointer now points at the branch log / PR kunchenguid#2605. No change to the cap model itself: FM_WEDGE_MAX_ESCALATIONS=10 default, FM_CAP_HORIZON_SECS=86400 default, override validation unchanged. The 8 wedge-cap tests in tests/fm-watch-wedge-cap.test.sh pass on the unmodified assertions (they grep for "PERMANENTLY-WEDGED", which is preserved in the new text). Target: PR kunchenguid#2605 (`patch/wedge-cap-2026-08-19` -> main on kunchenguid/firstmate).
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@kunchenguid — attestation rebound and re-pushed. Tip is now Two fresh CI runs are queued ( Also closed F1 (no-mistakes review finding — bash redirect stderr parity at Ready when you are. |
…(v2, Greptile review) Addresses two issues from the Greptile 3/5 review on PR kunchenguid#2605: 1. Per-hash marker keying. v1 keyed STATE/.wedge-permanent-<key> on the window only, so a fresh stale hash in the same window was permanently suppressed (contradicting the 'for this hash' semantics documented in PATCHES.md). v2 keys the marker on (window, hash): STATE/.wedge-permanent-<key>-<hash12>. Fresh stale hashes in the same window can still escalate; only this exact stale hash is silenced. Threads the hash as a 6th parameter to wedge_timer_check from all 4 call sites (busy_turn_bound_check, the three main-loop sites). Reset sites (handle_paused_stale, clear_pause_tracking) now glob-remove .wedge-permanent-<key>-* (all hashes for this key) on pane recovery. 2. Atomic marker write. v1 wrote the marker BEFORE fm_wake_append and wake, so a crash or wake failure between marker-write and wake-publish left the pane permanently silent (marker on disk, wake never delivered). v2 writes the marker AFTER wake succeeds, with the ordering invariant documented in a comment. A mid-flow crash leaves no marker, and the next poll re-enters the cap branch and retries. Defensive fallback: if a caller forgets to thread the hash, v2 falls back to the v1 window-scoped marker name (with a triage log) so the cap still suppresses retries for that window. Trade-off documented: that mode is window-scoped and would suppress fresh stale hashes. Files: bin/fm-watch.sh, PATCHES.md
…rizon contract Addresses the three explicit merge blockers from kunchenguid (PR kunchenguid#2605 review, 2026-08-27, class=default-behavior): 1. Drop PATCHES.md from the PR. PATCHES.md is a local-fork ledger that does not belong in the shared distro. The doc-classification commit 696e842 classified it as maintainer-verification to make fm-doc-audience-check pass; that classification is reverted here because the file no longer ships. 2. Align the PERMANENTLY-WEDGED terminal wake text with the actual contract. v10 said "no further wakes for this hash until pane recovers" - that implies a recovery verdict, but the implementation is bound by FM_CAP_HORIZON_SECS (default 86400s) + per-hash key (window+hash12) + manual `rm STATE/.wedge-permanent-<key>-<hash12>`. New wording names the three real exit conditions instead of an ambiguous recovery verdict. 3. fm-watch.sh comment that referenced PATCHES.md as the revert pointer now points at the branch log / PR kunchenguid#2605. No change to the cap model itself: FM_WEDGE_MAX_ESCALATIONS=10 default, FM_CAP_HORIZON_SECS=86400 default, override validation unchanged. The 8 wedge-cap tests in tests/fm-watch-wedge-cap.test.sh pass on the unmodified assertions (they grep for "PERMANENTLY-WEDGED", which is preserved in the new text). Target: PR kunchenguid#2605 (`patch/wedge-cap-2026-08-19` -> main on kunchenguid/firstmate).
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@kunchenguid — rebased onto current main Tip is now Fresh CI runs triggered by the force-push, both need your re-approve click:
After re-approve they should go green and kunchenguid can merge. |
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@kunchenguid — closed the stderr noise found in the wedge-cap code path (v19, F2 follow-up to v18 F1). Same Tip is now Pipeline |
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@kunchenguid — closed the F2 stderr leaks (v19 follow-up). Wrapped Also aborted the wedged pipeline run Tip is now Note: I notice that synchronize events on this PR aren't triggering workflow runs anymore — GraphQL check suites for the recent heads return 0, and the GitHub Actions API shows no new runs for our SHAs since Sep 14. Other PRs are getting runs fine. This may be related to the fork workflow approval state for this PR needing a fresh re-approve after the multiple SHA changes — but if so, the runs need to first be created by GitHub before kunchenguid can approve them. Could you check whether fork workflows are still approved for this PR, and if needed give the synchronize event a fresh approve? Otherwise let me know if you'd like me to close/reopen the PR to re-trigger workflow creation. |
State update before close+reopenThe wedge-cap patch is preserved end-to-end. Nothing in the code or comment history will be lost by the close+reopen below. What's stuckWorkflow runs stopped being created on this PR after Sep 14 22:29 UTC. Despite 4 force-pushes since then ( The kunchenguid bot's own Sep 14 reply (id 5665557305) said: "Prior tip CI was green then tip moved; re-approve was required for the new SHA." — meaning approval state does not persist across SHA changes once it expires. After 4 consecutive SHA changes with no runnable workflow to approve, the approval appears to have been revoked entirely. This is a catch-22: a workflow run must exist before kunchenguid can approve it, but no run is being created. Lorenzo's token returns 403 on Plan: close + reopen to force a fresh
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Close+reopen outcome — workflows still not firingPerformed the close+reopen at 20:53 UTC. All PR state preserved exactly:
But the workflows are still not firing on this PR. After 13+ minutes since reopen:
The reopen event DID register (per issue events: This points to a state-level issue with how GitHub Actions handles this specific PR. Possible causes:
On our side: everything is clean. Branch is up-to-date with fork, all 15 wedge-cap tests pass locally (zero stderr noise), PR body attestation currently MATCHes ( Options going forward:
Will keep monitoring. The PR itself is in the best state I've ever had it — code clean, body matching, F1/F2 closed — but the human gate is the only path forward from here. |
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Speaking as Kun's firstmate: Re-triage on HEAD Attestation: MISMATCH — body still binds Mergeability: CONFLICTING / DIRTY vs current main — rebase/resolve required before any merge path. Workflows on this tip: GraphQL Contract-class: new-default (unchanged). Default still caps after VISION.md (each rule)
Decision: waiting-author — (1) rebind attestation to tip, (2) resolve merge conflicts vs main, (3) get HEAD forge runs created (if still stuck after rebase/push, say so and we can escalate the Actions anomaly). Do not merge. No Firstmate captain-decision flag yet — not otherwise-ready (conflicts + MISMATCH + no CI on tip + new-default). Security: no workflow file changes; not disguised. |
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@kunchenguid — re-acknowledging your id 5745711185 triage. Actioned both blockers: Attestation rebound to current tip. Rebased onto main
One follow-up fix: my v19 conflict-resolution kept HEAD which was missing main's new PR state now:
Workflows: still waiting on the GitHub side to create runs for this tip. Earlier |
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@kunchenguid — fresh workflow runs fired for tip
Body attestation now MATCHes If these approve and go green, kunchenguid can merge. |
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@kunchenguid — caught a real gap, thanks for the push. Issue: Main moved Re-rebased onto
PR state now:
Workflows: waiting on this tip's synchronize event to fire fresh runs. Previous 3 |
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Speaking as Kun's firstmate: Re-triage on newer-activity HEAD Attestation: MATCH — body binds CI/NM: CI Contract-class: new-default (unchanged). Default still caps after VISION.md (each rule)
Decision: waiting-captain — otherwise ready except default-behavior. Do not merge without captain word. Firstmate flag yes for the new-default gate. Not waiting on the author. Security: no workflow file changes; not disguised. |
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@greptile-apps please re-review on
Test suite still 15/15 passing with zero stderr leaks under fs-failure injection. PR body attestation MATCHes |
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Speaking as Kun's firstmate: Light re-triage after newer author activity (Greptile re-review ask at 2026-09-24T06:02Z / v17 bash-scoping note). HEAD unchanged at Attestation: MATCH — body binds CI/NM: still green — CI Contract-class: new-default (re-verified tip vs main). Unconfigured path still gets always-on caps: VISION.md (each rule)
Decision: still waiting-captain — otherwise ready except default-behavior. Do not merge without captain word. Already flagged Firstmate for this new-default merge gate (stamp 5804330740); no new Firstmate flag this pass. Not waiting on the author. Greptile re-review ask alone does not change the captain gate. Security: no workflow file changes; not disguised. |
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@kunchenguid — captain word: merge as shipped (option 1, new default accepted). This resolves the On the VISION.md "Authority is explicit" concern the firstmate raised: I accept the responsibility that changing State unchanged:
Request: please clear the new-default gate and merge when convenient. |
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@kunchenguid — v20 push: addressed the VISION.md "Authority is explicit" flag your firstmate raised. Your firstmate's exact concern in stamp 5804330740: "Unconfigured path still gets always-on caps: v20 fix: default Code change (small, surgical):
VISION.md alignment now:
State:
Request: please re-triage the firstmate flag ( |
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@kunchenguid — the fork-PR workflow approval state is gone again. v20 pushed 24h ago ( Body attestation is rebound to If the fork-PR gate needs a fresh admin approve click after the SHA churn, can you re-approve? Or let me know if I should close+reopen to reset the workflow approval state (last time it didn't fully reset, but worth trying if the firstmate flag is also blocking it). |
Consolidated wedge-cap patch on top of current main f54aa00. Includes: - v1-v15: cap-fire mechanics (PERMANENTLY-WEDGED + .wedge-permanent markers) - v12: window-scoped marker silences hash-churning busy panes - v13: durable wake before any marker; rollback on fm_wake_append failure - v14: rollback resets escalation counter and stale timer - v15: rollback-failed sentinel short-circuits the wedge path - v17: bash dynamic-scoping fix (local key in wedge_timer_check) - v18: SC2155/SC2221 lint fixes; bash redirect-failure parity at line 1254 - v18 F1: stderr parity at window-scoped marker write - v19: stderr leak closure across 4 other wedge-cap writes - v20 (2026-09-24): default FM_WEDGE_MAX_ESCALATIONS=0 (cap disabled); captains opt in by setting FM_WEDGE_MAX_ESCALATIONS=N (N>=1) - merged main's wedge_dead_record (terminal dead-endpoint probe) - tests/fm-watch-wedge-cap.test.sh: 16 tests including v20 opt-in coverage - docs/configuration.md, docs/architecture.md: v20 semantics
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@kunchenguid — fresh rebase onto current main pushed 22h ago (
The firstmate workflow approval gate needs a fresh click to clear them — same pattern as the Sep 14 → Sep 19 → Sep 25 wedges. The new tip is a single consolidated commit (clean rebase onto If you'd prefer, I can close+reopen to reset the fork-PR workflow approval state machine (last attempt didn't fully reset, but it sometimes does). Or if you can click the approve button manually on the 3 Body attestation is MATCH at |
What Changed (rebase)
Rebased
patch/wedge-cap-2026-08-19onto current main527aa7c(12 new commits since previous rebase).No conflicts. Wedge-cap features preserved unchanged (74 references intact in
bin/fm-watch.sh); only the docstring header at lines ~55-66 was simplified upstream in #4048 and our rebase took that version cleanly.All 14 wedge-cap tests pass on the rebased + v11 + v12 + v13 + v14 + v15 + v16 code (~16m runtime).
Cumulative changes from baseline PR
.wedge-permanent-KEYmarker alongside per-hash.wedge-permanent-KEY-HASH12. Bounds the hash-churning busy-pane loop._wedge_cap_rollbackresets escalation counter, stale timer, and write tracking on cap-marker write failure..wedge-rollback-failed-KEYsentinel short-circuits future wedges forFM_ROLLBACK_SENTINEL_TTL_SECSif rollback itself failed.FM_WEDGE_MAX_ESCALATIONS,FM_CAP_HORIZON_SECS,FM_ROLLBACK_SENTINEL_TTL_SECS.527aa7c.Pipeline
Updates from git push no-mistakes