Make three of this session's failures impossible to repeat - #2417
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Each fix closes a hole this session actually fell into, enforced by a test rather than written down as advice. All four guards were mutation-tested: broken deliberately, watched to fail, restored. 1. The ledger pointer is now monotonic. scripts/generate-outstanding-issues-snapshot.mjs refuses only a move it can PROVE is backwards, keeping the committed revision, and falls through to the previous behaviour whenever either timestamp is missing or unparseable - an unprovable comparison must not change behaviour. This is the ca37696 regression (2026-08-25 rolled back to 2026-08-22, undetected for two days). Ledger #BR2217. 2. Guidance can no longer drift from the Playwright runner's exit contract. tests/playwright-exit-code-contract.test.ts pins the 75 admission code, the busy marker, that Playwright's own status is propagated, and that no process.exit(0) exists on the run path. It then checks AGENTS.md, the speed playbook and the Phase 5 handover do not ASSERT the stale claim while deliberately still permitting them to QUOTE it in order to refute it - two of them do exactly that. It also asserts the guidance still says the right thing, so deleting the sentence cannot satisfy the gate. Ledger #TBW7BR; AGENTS.md itself was already corrected by PR #2404, verified by reading it. 3. No document may silently tell a session to resume on a feature branch. tests/stale-resume-instructions.test.ts requires any git checkout of a claude/ or codex/ branch to sit in a document that states that branch's status. This is the root cause of the whole session: a handover opened with a checkout of a branch that had merged twenty hours earlier. Deliberately narrow and offline - it cannot know whether a branch merged, but it can refuse an instruction carrying no status at all, which is exactly the state that handover was in. 4. .gitignore already covered the NODE_COMPILE_CACHE junk directory, so no rule was added. The existing one-line comment is expanded to explain the cause (the variable takes a path, not a boolean), the measured cost (~2,835 files / 20 MB per worktree, a dozen worktrees), why it matters beyond tidiness (it inflates ci-change-scope with phantom changed files), and the real fix. Two of the three new tests FAILED on first run, and both failures were mine. One flagged the very documents that correct the Playwright myth, because they quote it. The other flagged `git switch -c`, which CREATES a branch rather than resuming one, and a template placeholder that names no branch - and I had written that wrong assumption into the test's own self-check. Both are fixed and the reasoning is recorded in the files. Verified. lint: "recorded a pass for lint:internal" after clearing node_modules/.cache/eslint. typecheck: "recorded a pass for typecheck:internal". Targeted suite over every test that touches the changed generator plus the three new files: "Test Files 6 passed | Tests 59 passed". prettier --check clean on every changed file. NOT green, stated plainly: the full suite reported "Tests 5 failed | 10727 passed". None of the failures is in the blast radius above, and the two I could still identify were a design-sync contract check and a 30-second universal-search timeout on a machine that was simultaneously exhausting its process table. I cannot prove all five are pre-existing, because I piped the run through `tail` and lost three of the names - the same trap this change's own documentation warns about. CI runs the full suite on this PR and is the authority. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe change adds monotonic ledger revision selection, contract tests for Playwright exit behavior, a stale branch-instruction document gate, and expanded Node compile-cache documentation. ChangesLedger revision generation
Playwright exit-code contract
Stale resume instruction gate
Node compile-cache documentation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk:🔵 Low · up to The change is mergeable with owner follow-up because two repository guard tests can currently pass without fully enforcing their intended contracts: one may accept unrelated guidance tokens, and the other may accept an unmarked branch checkout when a status marker appears elsewhere. This is a bounded test-quality risk with no demonstrated runtime or product impact. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description includes all major template sections, explains the implementation and risk, documents verification results, and clearly reports the five full-suite failures and unrun provider-backed gates. Full details: Docstring CoverageExplanation Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 4 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Inline comments:
In `@tests/playwright-exit-code-contract.test.ts`:
- Around line 76-82: Update the test named “at least one document still tells
the reader to check the status AND the output line” to assert one bounded
passage containing the exit-status concept, “75”, and “N passed” together,
allowing either order. Replace the separate token checks while preserving the
existing playbook read and intent.
In `@tests/stale-resume-instructions.test.ts`:
- Around line 68-72: Update the stale-resume validation around MARKER and the
matched checkout instructions so each branch is associated with an accepted
status marker in its own local section, rather than accepting any marker
elsewhere in the document. Ensure live branches use a status recognized by the
validator, and add fixtures covering unrelated markers and a live branch.
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Fix all unresolved CodeRabbit comments on this PR:
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…s-2026-08-27 # Conflicts: # data/outstanding-issues-snapshot.json
Two review findings on PR #2417, both correct: each guard was weaker than the sentence describing it, and would have passed on a document it was meant to reject. 1. The Playwright guidance check asserted `75` and `N passed` as separate tokens anywhere in the file. A document could carry `75` as a line number in one section and `N passed` in an unrelated one while telling nobody to check both. Both must now appear within one bounded window, in either order, via an exported helper with its own fixtures - including one proving the two facts 3,000 characters apart are rejected. 2. The stale-resume gate accepted a status marker anywhere in the document. A file could state that one branch is merged and silently instruct a checkout of a different, unmarked branch. The marker must now sit near the instruction it describes. Review also caught that the failure message offered "still the live working branch" as a valid fix while the pattern rejected exactly that wording - advice that could not be followed. Live-branch phrasings are now accepted, with a fixture asserting it, so the guidance and the check agree. No document in the tree currently matches a claude/ or codex/ branch checkout, so tightening cannot break anything today; the fixtures are what prove the guards work, which is why review asked for them and why they are here. Verified: "Tests 18 passed (18)" across both files. Mutation-tested: separating the two signals by 3,000 characters reddens the new bounded-passage assertion. The first attempt at that mutation was itself wrong - the appendix I appended contained both signals on one line - and it is recorded here because a mutation that fails to fail proves nothing about the guard. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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…ve merge conflicts Merge origin/main (PR #2417 landed 2 new pending inbox requests after this PR's base) and reconcile the complete inbox batch rather than leaving a partial reconciliation, per the ledger write-discipline gate. Regenerate the outstanding-issues and repo-awareness snapshots from source.
Summary
Each fix closes a hole this session actually fell into, enforced by a test rather than written down as advice. All four guards were mutation-tested — broken deliberately, watched to fail, restored.
1. The ledger pointer is now monotonic.
scripts/generate-outstanding-issues-snapshot.mjsrefuses only a move it can prove is backwards, keeping the committed revision, and falls through to the previous behaviour whenever either timestamp is missing or unparseable — an unprovable comparison must not change behaviour. This is theca376969bregression: a 2026-08-25 revision rolled back to 2026-08-22 by a regenerator running from a stale base, undetected for two days and found by accident. Ledger#BR2217.2. Guidance can no longer drift from the Playwright runner's exit contract.
tests/playwright-exit-code-contract.test.tspins the75admission code, the busy marker, that Playwright's own status is propagated, and that noprocess.exit(0)exists on the run path. It then checks thatAGENTS.md, the speed playbook and the Phase 5 handover do not assert the stale "exits 0 when tests fail" claim — while deliberately still permitting them to quote it in order to refute it, which two of them do. It also asserts the guidance still says the right thing, so deleting the sentence cannot satisfy the gate. Ledger#TBW7BR.AGENTS.mditself was already corrected by #2404; verified by reading it rather than assumed.3. No document may silently tell a session to resume on a feature branch.
tests/stale-resume-instructions.test.tsrequires anygit checkoutof aclaude/orcodex/branch to sit in a document that states that branch's status. This is the root cause of the entire session: a handover opened with a checkout of a branch that had merged twenty hours earlier, and the session re-derived a settled decision, prepared to fix an already-green check, and began re-running an experiment already performed ten times. The gate is deliberately narrow and offline — it cannot know whether a branch merged, but it can refuse an instruction carrying no status at all, which is exactly the state that handover was in.4.
.gitignorealready covered theNODE_COMPILE_CACHEjunk directory, so no rule was added — mine would have been a duplicate. The existing one-line comment is expanded to explain the cause (the variable takes a directory path, not a boolean), the measured cost (~2,835 files / 20 MB per worktree, across a dozen worktrees), why it matters beyond tidiness (untracked, it inflatesci-change-scope.mjswith thousands of phantom changed files and forces every scope classification to the heaviest route), and the real fix.Two of the three new tests failed on first run, and both failures were mine
One flagged the very documents that correct the Playwright myth, because they quote it. The other flagged
git switch -c, which creates a branch rather than resuming one, and a template placeholder naming no branch — and I had written that wrong assumption into the test's own self-check. Both are fixed, with the reasoning recorded in the test files. Worth stating because a guard that mis-fires is a guard people learn to ignore.Verification
Verification run. Results below, each quoted from the gate.
npm run lint— "recorded a pass forlint:internal", after clearingnode_modules/.cache/eslint(the per-file cache hides warnings caused by a different file's change).npm run typecheck— "recorded a pass fortypecheck:internal". Both quoted lines are gate-receipt records, which are only written on a zero exit — failures are never memoised — so they are real evidence, unlike the$?of a piped command.Targeted suite over every test that touches the changed generator, plus the three new files — "Test Files 6 passed | Tests 59 passed".
Mutation tests, all four caught: reverting the monotonic guard reddens the backwards case; making the runner swallow its exit code reddens two assertions; re-adding the unrefuted stale claim to a document reddens the prose check; adding a document that checks out a branch with no status marker reddens the resume gate.
npx prettier --checkon every changed file — "All matched files use Prettier code style!"Not green, stated plainly. The full suite reported "Tests 5 failed | 10727 passed". None of the failures is in the blast radius above, and the two I could still identify were a design-sync contract check and a 30-second
universal-searchtimeout on a machine that was simultaneously exhausting its process table (my own shell loop gotfork: Resource temporarily unavailable). I cannot prove all five are pre-existing, because I piped the run throughtailand lost three of the names — the same trap this change's own documentation warns about, hit for the third time in one session. CI runs the full suite here and is the authority.No gate was skipped, no assertion deleted, no test loosened, no tolerance lowered. No provider-backed gate was run.
Risk and rollout
Risk: low — one narrowly-scoped behavioural change to a bookkeeping generator, three new tests, and a comment. The generator change can only ever keep an existing value in a case it can prove is a regression; every other input path is byte-for-byte the previous behaviour, which the tests pin explicitly.
Rollback: revert the single commit. Nothing is staged for rollout and no runtime or product surface is touched.
Clinical Governance Preflight
Completed because
scripts/pr-policy.mjsclassifies this change asclinicalRisk: true. The trigger isdata/outstanding-issues-snapshot.json, a generated bookkeeping snapshot carrying no clinical content. Completed in full rather than waved away, because the classifier's judgement governs the merge.Clinical KB Database(sjrfecxgysukkwxsowpy)Each holds: this PR changes an issue-tracking generator, adds three repository-hygiene tests, and expands a
.gitignorecomment. No ingestion, answer-generation, retrieval, ranking, source-rendering, document-access, privacy or production-environment code is touched; no Supabase configuration changes; no key handling changes; and no clinical decision-support behaviour changes, so the SaMD classification is unaffected.Notes
#BR2217and#TBW7BRtravel with this PR and neednpm run issues:reconcileon a serialised branch after it lands.Note
Low Risk
Changes are limited to issue-snapshot bookkeeping (monotonic pointer only on provably backwards moves), new Vitest/doc contract gates, and documentation—no runtime, auth, or clinical product paths.
Overview
Adds three regression tests and one narrow generator fix so recent agent-session mistakes cannot recur silently, plus ledger snapshot/inbox updates and a clearer
.gitignorenote for the1/Node compile-cache directory.Monotonic
ledger_revision:generate-outstanding-issues-snapshot.mjsnow exportsresolveMonotonicRevisionand uses it inresolveRevisionso a stalegit logcannot overwrite a newer committed pointer with an older SHA/timestamp; unparseable timestamps still prefer the fresh git read. Covered bytests/outstanding-issues-revision-monotonic.test.ts(closes #BR2217).Playwright exit contract:
tests/playwright-exit-code-contract.test.tspinsrun-playwright.mjs(exit 75,DATABASE_HEAVY_RUN_ADMISSION_BUSY, propagated child status, noprocess.exit(0)on the run path) and blocks unrefuted “exits 0 when tests fail” prose in key docs while still allowing quoted refutations (closes #TBW7BR).Stale resume instructions:
tests/stale-resume-instructions.test.tsfails tracked markdown that tells a session togit checkout/git switcha concreteclaude/orcodex/branch without a document-level merged/obsolete/historical marker (excludes-b/-cand placeholders).Housekeeping: Regenerated
data/outstanding-issues-snapshot.jsonand two inbox “done” records; expanded.gitignorecommentary onNODE_COMPILE_CACHE=1polluting CI change-scope via thousands of untracked cache files.Reviewed by Cursor Bugbot for commit 0c20fa9. Configure here.
Summary by CodeRabbit
Documentation
Bug Fixes
Tests