Failed checks: 2 errors · 2 warnings

Check name	Status	Explanation	Resolution
Security Boundaries		The prior security finding remains unresolved. src/utils/safeWriteJson.ts:371-397 now stages beside the resolved symlink target and writes before copying its mode. If a private project MCP configura…	Create staged files with restrictive permissions before writing. Preserve the target mode before publication, and reject mode inspection or copy failures except for a confirmed absent target. Add regression tests for a private symlink targe…
Persistence Integrity		The prior failure remains. Project MCP writes enable confinement at src/services/mcp/McpHub.ts:2140-2143. In src/utils/safeWriteJson.ts, an ancestor swap before staging can redirect the rename ove…	Preserve existing destinations during escaped publication. Undo only confirmed publications after checking the staged file identity. Run rollback and cleanup even if the scope recheck fails, and report retained backup paths. Add regression …
Regression Evidence		Durability-failure coverage remains incomplete. guardedWrite.ts:731-743 preserves partial observations and handles failed token reads after a committed write. The durability test at `guardedWrite.sp…	Add a durability-failure test for a partial edit that confirms a later full replacement is rejected. Add a test where both post-commit token reads fail, confirming that the previous observation remains and the original durability error is r…
Lifecycle Resource Cleanup		The staging cleanup leak remains. guardedWrite.ts:370 calls the new self-staging writer. If a Windows handle blocks both the commit and staging-file unlink, safeWriteText.ts:1072-1084 suppresses t…	Retry staging-file cleanup. If cleanup still fails, report the remaining file and directory paths while preserving the original error and any backup-cleanup error. Add a test where both commit and staging unlink fail.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title clearly identifies the guardedWrite feature and its relationship to the writer’s guard API.
Description check		The description explains the changes, merge order, implementation rationale, tests, and known limitations. It references related issues but does not include the template’s explicit “Closes: #…” entry …
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description explains the changes, merge order, implementation rationale, tests, and known limitations. It references related issues but does not include the template’s explicit “Closes: #…” entry or completed checklist and documentation sections.

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

Review status

Thanks for contributing. This comment tracks the review sequence and the next action.

Current step: Required CI passed. Waiting for automated review of the latest commit.

If automated review does not start, a maintainer must restart it.

Review-state labels are managed by this workflow; do not edit them manually. community-approved is managed the same way — do not add or remove it manually. It signals a fresh community code approval for the current head as an advisory priority only; maintainer review is still required.

Codecov Report

❌ Patch coverage is 91.65563% with 63 lines in your changes missing coverage. Please review.

📢 Thoughts on this report? Let us know!

Hosted verdicts on 025fb7d0da0d9a075855addc0986fe7989c9a52b

Read from GET /commits/025fb7d0.../check-runs, not predicted.

The six required contexts, from the required_status_checks member of ruleset 15494382 (Protect Main, enforcement active, conditions.ref_name.include = ["~DEFAULT_BRANCH"]), all completed/success on this head: check-translations 128654644762, platform-unit-test (ubuntu-latest) 128654644828, platform-unit-test (windows-latest) 128654644966, compile 128654644829, knip 128654644935, e2e-mock 128654644659 (strict_required_status_checks_policy: false, do_not_enforce_on_create: false). knip going green hosted is the point of the entry line in this commit: the tool is an entry-only production file (three non-test references tree-wide, all its own export or a docstring mention), and knip --production does not credit imports from files it reports as unused, so the entry had to move from the writer to the tool for both units to pass in isolation.

Also green: Analyze (javascript-typescript), CodeQL, Build test VSIX, dependency-review, invisible-chars, theme-fixtures, webview-visual, codecov/patch, codecov/patch/webview-patch, Zoo Code / reconcile PR review state (2359), Zoo Code / resolve PRs to reconcile. CodeRabbit completed/skipped. extension-host-visual was still running at this read.

mutation-diff completed/failure, reason read from its log verbatim at line 1848: Mutation gate failed: extension has 1054 changed executable lines (limit 500). Split the PR or obtain a maintainer-reviewed narrow exclusion. The metric and its base, named: 1054 is CI's cumulative count against this PR's base (main, which contains neither predecessor); this unit's own delta against its parent 8a9d5b789 is 394 (over=false, the number the split plan on #1991 predicts for U5-A); the stacked figure over the unit-chain base 416179d17de8 is 607 (over=true). All three from scripts/stryker-diff.mjs line accounting on committed trees. The plan addendum 6717425955 records that the gate reads cumulative against the PR base, so this row can only come back green once #1913 and #2357 are in main - that is the declared order main -> #1913 -> #2357 -> this unit, not a defect in this unit. mutation-diff is not in the required-context list above, so it is advisory. Disclosures, same as the parent PR: no local Stryker preflight was run for this head, and no Stryker disable directive was added anywhere on this stack.

Review state, read rather than assumed. pull_request parameters on the same ruleset require required_approving_review_count: 1 with require_code_owner_review: true, and /pulls/2359/reviews reports no reviews while /pulls/2359/review-requests lists no requested reviewers or teams; mergeable_state is blocked with mergeable: true. So what gates this PR is one approving review that includes a code owner - a human - and no check. The two platform legs, knip, compile, e2e-mock and check-translations are done.

Local gates on this committed tree, pinned node v22.23.4 (recorded in the PR body and repeated here for the record): prettier --check clean on the three touched files; eslint --prune-suppressions --max-warnings=0 core/tools/guardedWrite.ts core/tools/__tests__/guardedWrite.spec.ts exit 0 with no suppression count increase; tsc -p src/tsconfig.json --noEmit exit 0; knip --treat-config-hints-as-errors and knip --production exit 0 with empty output; node --test scripts/knip-policy.test.mjs 8/8; guardedWrite.spec.ts under vitest.core.config.ts 62 passed (62); full core --coverage 198 files, 4344 passed | 9 skipped; full misc --coverage 120 passed | 1 skipped files, 2127 passed | 17 skipped tests. Core and unit exit 1 locally only on two named environmental classes: services/rules/__tests__/rules.spec.ts failing 5 rows at its own fs.symlink setup with EPERM: operation not permitted, symlink (proved pre-existing at the parent head), and EnvironmentTeardownError: [vitest-worker]: Closing rpc while "onUserConsoleLog" was pending originating in core/webview/__tests__/ClineProvider.spec.ts only inside a full-shard concurrent run - that file run alone is 339 passed (339) with zero such errors, twice. Both platform legs are green on this head, so neither class reproduced on the runners.

Check-run ids corrected in this edit: the first draft of this comment carried ids that were not read from the check-runs response for this head.

Supersede one number, and one reading of it. At head 3901239982bc8fa3ad96996539b4845aaa25bb31 the mutation gate's own sentence is 1,284 changed executable lines against the 500 limit (check run 129145340162); the 1,283 quoted in 6739046271 is the number at the previous head 2c3f744f2, not at this one. And per the branch owner's reading of Protect Main (ruleset 15494382 lists six required contexts and mutation-diff is not among them), this red arm does not block the queue or strip coderabbit-review-active - it is a reviewability argument for maintainers, not a wall. Surviving mutants have never been measured on this PR: the width gate aborts buildManifest before any mutant verdict exists, so nothing here should be read as mutation-clean.

The arithmetic on this pull, and the one question it leaves for a maintainer.

Size. The mutation gate in scripts/stryker-diff.mjs caps a pull at 500 changed executable lines. At head ebd6d9e17df3bc0d3d234bb13dbe00b5be5be3bf, tree 40aa5e90bec36f44e399d34c33d816a855f05838, measured from a clean checkout of that commit with the instrument reading content from disk and the merge base printed as 5319fe91fb0caf4aa4ec66aac68fa03744ebbc23, the gate charges 1,284 counted executable lines across 10 files, and src/core/tools/guardedWrite.ts alone accounts for 508 of them, so it is over the cap by itself. Per file: guardedWrite.ts 508, safeWriteText.ts 453, safeWriteJson.ts 132, fileLock.ts 62, ReadFileTool.ts 40, McpHub.ts 27, jsonFileRecovery.ts 26, observationRegistry.ts 20, indentation-reader.ts 11, Task.ts 5. That figure is a property of this head against current main, not of any merge: refreshing the branch onto main would move the number without moving it under 500. CI is the only proof of the gate, and none of the above is a claim that CI will or will not pass, it is what the same instrument computes from the committed tree.

Conflict. The branch carries the has-conflicts label, and we confirm it independently: git merge-tree between main tip 53cb5b5e7c8014d3226e5636bbca8999ed3b8526 and this head exits 1, conflicted, on exactly 2 paths, src/core/task/Task.ts and src/core/task/__tests__/Task.spec.ts. Both are already in this pull's 28-path changed set, and each has exactly 1 main commit on it since the merge base, and that commit is 53cb5b5e7c80 itself, the unit 2 commit of the 1914 split landing on trunk. So the divergence is ours against ours rather than a maintainer keystroke, and resolving it means authoring 4 conflict hunks, 9 marker lines in Task.ts at lines 400, 405, 422, 3627, 3634, 3643, 3655, 3658, 3663 and 3 more in the spec at 4774, 4780, 4786.

Plan. The content here is already covered by the split plan of record at #2021 with the carrier comment at #2021 (comment), which cuts this same material into units that each sit under the 500-line cap, the chain landing 1395 first, then the safeWriteText unit, then the atomic publish unit. Those replacements are cut at current main, which already contains the commit that moved under this branch, so the 2 conflicted paths stop mattering once the chain exists.

The question. Does this pull convert into that chain, or is it superseded by it? We are not pushing, re-basing or opening anything further on this branch until that is answered.

One finding from measuring this, which is trunk content and not this pull's. While pricing we ran the gate's own directive validator over src/core/task/Task.ts. At main tip the file carries 7 Stryker disable directive lines, 5 of which match the gate's pattern and 2 of which do not, at lines 4454 and 4890, because the pattern allows no whitespace after a comma inside a mutator list while those two comments read ConditionalExpression, EqualityOperator and ConditionalExpression, LogicalOperator, EqualityOperator. The gate therefore reports them as broad or unreasoned exclusions although each names its mutators and gives a reason. The consequence for any pull that touches this file, including this one, is that the advisory is caused by trunk rather than by the pull: our run at this head printed 1 advisory naming src/core/task/Task.ts:4470, and because the validator throws at the first bad directive in a file while the caller catches once per file, a printed advisory count is a lower bound, and the second bad directive at line 4906 was invisible in that print. The whole remedy is 3 characters across 2 comments, deleting the space after each comma, and we have pushed a branch doing exactly that, cut from 53cb5b5e7c80, with a pull opened at easonLiangWorldedtech#88 - on the fork, because the credential we run opens pulls on the fork and not on this repository.

Correction to my own comment above, and the object that disproves it.

At the end of comment 6793946082 I wrote that the branch doing the trunk directive fix had a pull opened on the fork, in my words, on the fork, because the credential we run opens pulls on the fork and not on this repository. That sentence is wrong and it is mine to correct.

The cause was not a permission. The pull request was attempted against this repository once with a malformed request shape, the authorization fields passed where the HTTP client expects a headers entry, so GitHub treated the request as anonymous and answered 401 with the message Requires authentication. The same credential opened #2428 against this repository a few minutes later with a well-formed request, same title, same head branch, same base, same body. Measured against the rate endpoint at no cost, the same credential reports an hourly core limit of 5,000 when the request is well formed and 60 when it is not, which is the anonymous bucket, and that is also why two count classes appeared beside each other inside one round of our logs.

So #2428 is the pull for the directive fix, carrying head 4f0ca7c against base 53cb5b5, one file, 2 insertions and 2 deletions, and the fork-side pull that was opened while the 401 was still being read as a permission limit has been closed as redundant. The finding about the two mutation-exclusion comments on trunk, and the finding that a printed advisory count is a lower bound rather than a count, stand unchanged and are unaffected by this correction.

Rows paid against the mutation digest this unit delta produces. No production line changed.

Coordinates. Head replaced 022bd3a. Head pushed to refs/heads/vps2f-1914-u5a 7abba7f, moved by force-with-lease against a transport read taken before the push and read back off the transport after it. Base for every width figure below, upstream main tip efc22ed. One file added on top of the replaced head, src/core/tools/tests/guardedWriteMutationGaps.spec.ts, 668 lines added, 29 rows, blob bcde42e0bccc42f7e35644343e14d22e9b7b2902.

Caps quoted from measurements at both heads, not asserted

Instrument scripts/stryker-diff.mjs blob 7dfe0006d2d5c7e4d2282f65f68b8ed5f16866bc at each head.

Line cap MAX_CHANGED_LINES 500 at line 11. Cumulative counted executable lines over this base: 1259 at 022bd3a and 1259 at 7abba7f, so 759 over the cap at both heads. Largest single file src/core/tools/guardedWrite.ts: 508 counted executable lines at 022bd3a and 508 at 7abba7f, 8 over the cap at both heads. The added spec file charges 0 counted lines at 7abba7f because EXCLUDED_PATH_SEGMENTS at line 85 drops the tests segment, so paying for these rows moves the line cap by nothing.

Mutant cap MAX_MUTANTS 400 at line 12. Stryker 10 preflight printed Instrumented 1 source file with 355 mutants at 022bd3a and the same 355 at 7abba7f, 45 under the cap at both heads. The 355-row population is identical at both heads: the per-mutant dumps share all 355 keys, 0 rows appear in one and not the other.

The mutation leg, same runner and same population, before and after

Runner. Both heads measured with the instruments own selection, line accounting, mutant counting and advisory evaluation, and with its CLI invocation replaced by a substituted in-place Stryker 10 run, because the committed invocation passes the config path where Stryker 10 expects the run subcommand, as recorded in the r350 row of the campaign ledger. Substituted environment: STRYKER_VITEST_CONFIG, STRYKER_REPORT_DIR, STRYKER_TEMP_DIR, STRYKER_IN_PLACE true, STRYKER_VITEST_RELATED true, STRYKER_TEST_FILES empty, working directory src. These are not the CI job.

At 022bd3a, selectors limited to src/core/tools/guardedWrite.ts: valid 355, killed 250, survived 70, noCoverage 24, timeout 11, blocking-status 94, evaluateReport advisories 1 from the 11 timeouts, instrument label Advisory findings, testFiles 1, preflight 22 seconds, run 196 seconds.
At 7abba7f, same selectors, same substituted runner: valid 355, killed 299, survived 42, noCoverage 14, timeout 0, blocking-status 56, evaluateReport advisories 0, instrument label Advisory findings, testFiles 2, preflight 24 seconds, run 215 seconds.

Row by row on the identical population: 30 rows went Survived to Killed, 8 went NoCoverage to Killed, 11 went Timeout to Killed, 2 went NoCoverage to Survived, and 0 went from killed to not-killed.

The figure that matters is therefore the delta on the same population, not a claim that the tests are good: blocking-status 94 to 56, which is 38 of the 94 previously blocking rows paid for, 28 of the 70 survivors and 10 of the 24 uncovered rows now answered by a row that fails without the construct. Killed went 250 to 299, so 49 of 355 rows changed state, 0.138 of the population.

Lines of the rows that changed state, all in src/core/tools/guardedWrite.ts:
Survived to Killed, 30 rows: 51, 86 twice, 91 twice, 244, 253, 267, 276, 339, 352, 363, 367, 375, 665, 673 three times, 737, 741, 763 four times, 799, 808 four times, 819.
NoCoverage to Killed, 8 rows: 267, 272 three times, 273, 665, 667, 741.
Timeout to Killed, 11 rows: 142, 149, 155, 156, 157, 158, 159, 162, 163, 701, 854.
NoCoverage to Survived, 2 rows: 272 and 624.

The 11 timeouts carry a caveat of their own. Between two runs of populations at two heads the timeout split did not reproduce, 11 at 022bd3a and 0 at 7abba7f, and every one of those 11 rows sits in the chain reservation where a mutant leaves the chain slot closed forever. The new rows bound their waits, so they answer with a failure where the spec of record awaited a chain that never opened. That is consistent with the rows causing it, and on this machine a timeout is not a reproducible signal, so the 38 rows that moved out of Survived or NoCoverage are what this comment treats as the paid gap and the 11 are not.

What still is not killed, 56 of 355 rows at 7abba7f

42 Survived and 14 NoCoverage. 38 of the 56 sit in lines 438 to 619, the containment seam, 24 survived and 14 uncovered. That region is the code the adopted shape two moves out of this unit into a module of its own, so no row here targets it and this comment makes no claim about it in either direction. Lines, by row count: 440 six, 501 eight, 514 two, 516 two, 528, 530 ten, 536, 537, 558, 560, 568, 577, 579, 589 two.

The other 18 rows are outside that region, all 18 now executed by at least one test and still reporting Survived. Each is reported with its reasoning in one line, and with no directive attached:

1. line 85 block emptied, the settled-link cleanup body: a link that never deletes leaves a settled promise in the map, and the next write chains onto a settled promise, which starts it on its next microtask exactly as an empty map does.
2. line 86 condition to false, the same cleanup: same reason as row 1, this is the never-delete direction of the guard this commit pays for in the delete-too-eagerly direction.
3. line 86 to 88 block emptied: same reason as row 1, it removes only the delete call inside the branch.
4. line 87 delete call removed: same reason as row 1.
5. line 90 block emptied, the rejected-link cleanup body: same reason as row 1 for the rejection path.
6. line 91 condition to false: same reason as row 1 for the rejection path.
7. line 91 to 93 block emptied: same reason as row 1 for the rejection path.
8. line 92 delete call removed: same reason as row 1 for the rejection path.
9. line 272 condition to true: records an undefined committed token under the lock instead of skipping the record, and committedTokenFor returns undefined for a recorded undefined and for an absent entry alike.
10. line 379 condition to true: the same shape in the other publish helper, same reason as row 9.
11. line 624 default kind literal to empty string: kind is only ever compared against edit and create, so an empty string takes the update path.
12. line 672 options object emptied: the ancestor stat returns number dev and ino instead of bigint, and in JavaScript a bigint and an equal number compare unequal on neither side, so the pin comparison still passes.
13. line 672 bigint flag to false: the same change reached by the boolean mutant, same reason as row 12.
14. line 690 first cancellation operand dropped: the same decision is taken again with the same inputs at the dequeue check on line 712, which every publish path reaches.
15. line 690 second cancellation operand dropped: same reason as row 14.
16. line 690 or changed to and: the cancel paths set abort and bump the generation together, so and agrees with or at this fence and at line 712.
17. line 741 coalescing changed to and: yields undefined instead of true when the override is absent, and observe declares its third parameter as complete defaulting to true, src/core/task/observationRegistry.ts line 44, so undefined and true reach the same state.
18. line 849 coalescing changed to and: the success-path twin of row 17, same reason.

Control that the chain tail rows actually carry

The first draft of the two chain-tail rows did not fail under a hand mutation of the guard they name, so it was rewritten before this head was pushed and is not claimed here. The pushed rows were then run against the guard mutated in place two ways: the ownership comparison replaced by always-delete, and replaced by the inverted comparison. Both rows fail in both runs, 2 failed and 94 passed of 96 across the two guardedWrite spec files, while src/core/tools/tests/guardedWrite.spec.ts itself passes in both runs. The tool file was restored to blob 32ffe6cebadb2549e5ca564c648f74e333ff6e9b after each run and 0 rows remain in git status --porcelain.

Local gates, same commands at both heads, no scratch in the tree

At 022bd3a, the head being replaced, with the new file out of the tree: prettier 3.9.10 --check . exit 0. tsc 5.9.3 -p tsconfig.json --noEmit at the root exit 0 and tsc --noEmit in src exit 0. eslint 9.39.5 . --ext=ts --max-warnings=0 --prune-suppressions exit 0, with src/eslint-suppressions.json re-serialised to 33294 bytes by the prune flag, restored with git checkout -- to 30910 bytes and blob f3714cd1f521c1d34e2dbc252cd7b970d226f6a6 identical to the tracked blob, 0 porcelain rows after restore. vitest 4.1.12 over the 19 suites this unit and the merge touch: 19 files passed, 952 passed, 4 skipped of 956, 9.21 seconds. knip --treat-config-hints-as-errors exit 1 reporting 4 unused TaskStatus enum members in packages/types/src/task.ts lines 101 to 104 plus 1 configuration hint on vitest/globals, 0 unused files.
At 7abba7f, the head pushed: the same commands give the same results, 19 files passed, 952 passed, 4 skipped of 956 in 8.01 seconds, prettier check exit 0, both tsc legs exit 0, eslint exit 0 with suppressions restored to 30910 bytes, and the same 5 knip findings with 0 unused files. The added file on its own: 29 passed of 29 in 0.485 seconds, eslint --max-warnings=0 --no-warn-ignored exit 0.
The commit ran the repositories hooks: lint-staged executed prettier --write and eslint over the staged file at commit time, and the shims under .husky/_ had to be installed into this worktree from the donor tree first because the worktree checkout carried only 4 of them.

What this comment does not claim

a green local preflight over Valid 0, Killed 0, Survived 0 and No coverage 0 with blocking 0 and advisories 2 is not evidence in either direction on this machine. the mutation leg is unmeasured, a PASS over an empty digest is not evidence in either direction, and CI at the first pushed unit is the only proof of the gate.

Those two sentences are quoted because the campaign requires them, and each bounds a different claim. The first bounds nothing here, since the preflight at both heads reported 355 mutants rather than an empty digest. The second bounds the CI claim: the digests above are measured locally on a substituted in-place runner, they are not the mutation-diff job, and the gate at this pull stays red on the cumulative 1259-line edge until the predecessors land, which is a size fact about the pushed head and not about these rows.
Three further limits. The local 19-suite set excludes ClineProvider.spec.ts and the main-tip control lacks 6 of those suites, so suite counts are not comparable across heads. The equivalence verdicts above rest on reading each construct together with the row that now executes it, 18 of the 56 not-killed rows, and they are reported as candidates rather than as settled facts. The 38 seam-region rows are unmeasured by this round in the sense that no row here aims at them, so no verdict of any kind is offered on them.
No review thread was resolved by this comment and no re-review is requested.

Rows settled on the containment seam at guardedWrite.ts lines 438 to 619. No executable line changed, no suppression added, no directive added, no exclusion added.

Coordinates. Head replaced 7abba7f. Head pushed to refs/heads/vps2f-1914-u5a f32f7f7, one commit, parent 022bd3a, moved by force-with-lease against a transport read taken before the push and read back off the transport after it. Base for every width figure below: upstream main tip efc22ed, which is also the merge base the harness printed for this edge. Instrument for every count below: scripts/stryker-diff.mjs at the pushed head, blob 7dfe0006d2d5c7e4d2282f65f68b8ed5f16866bc, 30108 bytes, 869 lines, MAX_CHANGED_LINES 500 at line 11, MAX_MUTANTS 400 at line 12, BLOCKING_MUTANT_STATUSES Survived and NoCoverage at line 83, EXCLUDED_PATH_SEGMENTS including tests at line 85.

Width, measured with that instrument at both heads and quoted at each. Counted executable lines over main: 1259 at 7abba7f and 1259 at f32f7f7, the delta being 759 lines over MAX_CHANGED_LINES 500. Restricted to the priced file core/tools/guardedWrite.ts the same instrument counts 508 at both heads, 8 lines over the cap, and selects 355 mutants. My commit adds only src/core/tools/tests/guardedWriteContainmentGaps.spec.ts, which line 85 excludes, so the width does not move. The width question on pull 2359, whether the cap is charged per file or per delta, stays a human call: a test file changes no executable line, and 1259 counted lines is a count, not a verdict.

Population. The substituted in-place runner wrote a report at the replaced head and one at the pushed head. Population fingerprint over sorted file, line, column, mutator and replacement keys, sha256 first 16 hex digits: 3b941257acd56f7c on 355 keys in both, and the same fingerprint taken over the end line and the end column as well reads 063e2d94cca2a05b in both, the two key lists being equal as multisets over all 355 rows, so the same population was measured twice and the before column is a measurement of the same mutants the after column scored.

Counts. Before at 7abba7f: Valid 355, Killed 299, Timeout 0, Survived 42, No coverage 14, blocking-status rows 56. After at f32f7f7: Valid 355, Killed 334, Timeout 1, Survived 20, No coverage 0, blocking-status rows 20. Transitions: Survived to Killed 23, No coverage to Killed 14, Survived to Timeout 1. evaluateReport on the written after report returns advisories 0 and the instrument prints the label Advisory findings; the run took 241 seconds with concurrency 2 and the preflight 29 seconds. These are counts of mutants in four buckets and not a score. a green local preflight over Valid 0, Killed 0, Survived 0 and No coverage 0 with blocking 0 and advisories 2 is not evidence in either direction on this machine. the mutation leg is unmeasured, a PASS over an empty digest is not evidence in either direction, and CI at the first pushed unit is the only proof of the gate.

What is measured and what is not. The leg above is the unit-local leg I ran myself with the CLI invocation substituted, because the committed invocation passes the config path where Stryker 10 expects the run subcommand. CI at this head is unmeasured by me: the whole-pull leg charges the pull as it would merge, base efc22ed and head the merge candidate of f32f7f7, and at 1259 counted lines over the 500 cap the instrument throws in preflight before any digest, which is what the earlier run 131003308488 on pull 2359 showed when it exited 1 in 36 seconds printing only Process completed with exit code 1. The full typecheck, the e2e legs and the VS Code host are likewise unmeasured here. The local leg is mine and not CIs.

Ownership of the seam rows. Whole-file git blame at 7abba7f over guardedWrite.ts attributes every line in 438 to 619 that a blocking row sits on to 025fb7d0da0d9a1c00ba7ad9d3ee7bd9a2a1a0c5, unit u5a the guardedWrite tool on top of the writer guard API, or to 5ff8435fcab6b3d8f2fcd5774116a0b6d51ad9d1, fix u5a reserve the chain slot, pin the inspected fact, refresh on durability failure. 2 distinct commits, 863 lines read, 0 rows in that range from any other commit, so no row here belongs to a construct another unit owns.

Rows settled by measurement, 36 of the 56. Each is a row in the before report whose status changed in the after report, 34 of them inside the seam range and 2 of them incidentally outside it. 33 of the 34 carry a hand-applied substitution of their own whose failure message is quoted below. 1 seam row, guardedWrite.ts line 536 column 4 ConditionalExpression replaced with false, Survived to Killed in the after run without a hand substitution of its own, is reported as a count and not as something I proved by hand. The file and line of every row is named.

Lexical containment, guardedWrite.ts line 440, 6 rows, all Survived to Killed. The test publishes a target spelled as the workspace root itself, a parent escape and a join that escapes; under each substitution the guard returns no rejection and the run fails with , which is the row dying because the write went through instead of being refused.

Ancestor chain and its bigint request, guardedWrite.ts line 514 column 35 ObjectLiteral to empty object and column 45 BooleanLiteral to false, both Survived to Killed, and line 589 column 45 ObjectLiteral to empty object and column 55 BooleanLiteral to false, both Survived to Killed. The pin reads its dev and ino from a stat that must carry the bigint option, and the fixture hands out an inode of 9007199254740993 which is 2 to the 53 plus 1, so a number answer and a bigint answer cannot compare equal at the recheck on line 673. Under the line 514 substitutions the run fails with raised from guardedWrite.ts:674. Under the line 589 substitutions the run fails on the request itself, printed as an assertion that the stat double was called with the deep directory and one further argument, where the argument the double demands carries the bigint option. Honest nuance: these four rows are discriminated by the request the guard makes and by the record the publish carries, not by a user-visible outcome on a real filesystem.

Chain membership, guardedWrite.ts line 501 column 6, 4 rows, all Survived to Killed: the whole conjunction replaced with true, the same conjunction with its third operand joined by or instead of and, the first two operands replaced with true, and the first two operands joined by or instead of and. The added test publishes a target that sits in the workspace itself, where path.relative reports the empty string for the directory holding the target, and it asserts the ancestor list the publish hands the writer is one entry naming the workspace root. Under each of the four substitutions the run fails on an assertion that the ancestor list carried two entries both naming the workspace root where one entry naming the workspace root was expected, and this body spells out what vitest prints with its own array abbreviation. The duplicate is the chain walking the empty spelling: splitting the empty string on the separator yields no segments and joining nothing back onto the root yields the root again, so the same directory is pinned twice from the same reading.

Code taxonomy in the stat path, guardedWrite.ts line 516 column 29 ConditionalExpression to false and column 38 StringLiteral to the empty string, both Survived to Killed. Under each the run fails with thrown out of the guard instead of the ENOTDIR entry being skipped, which is the row dying because a directory that is not a directory stops a write that should have gone through.

Code taxonomy in the realpath path, guardedWrite.ts line 528 column 69 BlockStatement to an empty block, line 530 columns 8, 17, 29 and 38 and column 49, 8 rows in total counting both operands and both literals, all Survived to Killed. Under the empty catch block and under the variants that turn the ENOENT test into a throw the run fails with , and under the ENOTDIR variants with . The tests hold an EACCES at a directory on the chain and require the failure to travel to the caller rather than being swallowed into a pin that ignores the unreadable directory.

Record handed to the writer, guardedWrite.ts line 537 column 7 ObjectLiteral to an empty block, Survived to Killed. Under the substitution the run fails with raised from guardedWrite.ts:674, because the entry the publish is told to recheck names no directory, so the recheck that must succeed refuses.

Walk to the nearest existing ancestor, guardedWrite.ts line 558 column 7 ConditionalExpression to false, line 560 column 5 StringLiteral to the empty string, line 577 column 9 ConditionalExpression to false and line 579 column 7 StringLiteral to the empty string, 4 rows, all Survived to Killed. The target-side and ancestor-side tests publish a target that cannot be resolved and a parent that answers EACCES, and require the unresolved verdict rather than a silent fallthrough to the lexical path. Under the two conditional rows the run fails with because the guard accepts the write, and under the two literal rows with where the expected value in full reads Path could not be resolved, so it cannot be checked against the workspace -- retry with a path inside the workspace.

End of the climb, guardedWrite.ts line 568 column 8 ConditionalExpression to false, Survived to Timeout. The test resolves only the first realpath request, which is the containment check looking at the workspace, and refuses every request after it, so the climb is walking a chain that has gone missing behind it. The real code ends the climb where dirname of the filesystem root is the root itself and reports the workspace as unresolvable; the mutated code never ends. Hand-applied, that substitution ran 50104 ms and the run died with the message that vitest-pool reports the worker forks emitted an error, whose printed form carries brackets that are spelled out here, and the instrument records the row as Timeout rather than Killed. Timeout is not in BLOCKING_MUTANT_STATUSES at line 83, so the row leaves the blocking count on the instruments own rule and I report it as a count, not as a kill.

Outside the seam, 2 rows paid without aiming at them. guardedWrite.ts line 672 column 48 ObjectLiteral to an empty object and column 58 BooleanLiteral to false, both Survived to Killed: the containment test that pins a wide inode drives the recheck on line 673, which reads the bigint option on the stat call inside verifyTarget. The other 12 outside rows named below were already carried as equivalence candidates at 7abba7f and are unmeasured by this round.

Rows left open, 20 of the 56, with one line of reasoning each and the evidence that makes each a candidate rather than a preference. The evidence is the same for all 20: the after run scored the identical population, digest 3b941257acd56f7c, with 18 rows executed against the seam, 33 of the 38 seam rows proven by hand substitution and 38 rows in total moved out of the blocking count, and these 20 came back Survived. That leaves them where a measurement can put a mutant, not where I would like it.

guardedWrite.ts line 501, 4 rows. line 501 column 18 ConditionalExpression on relative is not the dot replaced with true: the conjunction is guarded first by relative itself, and path.relative returns the empty string, not the dot, for the directory that is the workspace, so the second operand never decides anything for any spelling that reaches this line. line 501 column 31 StringLiteral the dot replaced with the empty string: for the only spelling where relative equals the empty string the first operand is already false, and for every below-root spelling both literals are true, so the comparison result does not change. line 501 column 39 MethodExpression startsWith replaced with endsWith: for the empty spelling and for every below-root chain both spellings are false, and the spellings where they differ are outside-relative chains that the containment verdict on lines 443 to 450 and the canonical verdict on lines 467 to 489 reject before ancestorIdentities is called. line 501 column 59 StringLiteral the parent spelling replaced with the empty string: the prefix test then compares against the bare separator, and path.relative never returns a chain that begins with the separator. Evidence for all four: a probe of the four parent spellings that a workspace path and a target can produce on this machine, written to r356-pathfacts.json beside this comment, which returns the empty string for the workspace root itself, sub backslash deep two levels down, the parent spelling one level up and the double parent spelling two levels up, and never the dot and never a leading separator, alongside the after-run status Survived on the identical population.

Outside the seam, 16 rows, offered as candidates at 7abba7f and still Survived at f32f7f7. Columns and mutators per line: line 85 9 BlockStatement ; line 86 8 ConditionalExpression, 45 BlockStatement ; line 87 5 CallExpression ; line 90 9 BlockStatement ; line 91 8 ConditionalExpression, 45 BlockStatement ; line 92 5 CallExpression ; line 272 10 ConditionalExpression ; line 379 10 ConditionalExpression ; line 624 27 StringLiteral ; line 690 7 ConditionalExpression, 7 LogicalOperator, 21 ConditionalExpression ; line 741 30 LogicalOperator ; line 849 29 LogicalOperator. The reasoning published for them at 7abba7f is unchanged by this round: a whole-block substitution inside a guard branch that the executed tests drive to the same branch outcome, and a logical or conditional substitution whose surviving operand decides the result for every input these branches receive. Nothing was suppressed, directed or excluded for any of them.

Gates on the pushed head, run locally. The new spec passes prettier --check. eslint --prune-suppressions --max-warnings=0 on the new file exits 0 and src/eslint-suppressions.json is byte-identical to the head it replaced, blob f3714cd1f521c1d34e2dbc252cd7b970d226f6a6, 30910 bytes, sha256 first 16 hex digits c910ac80835ca199, with 0 new entries and no entry reduced. tsc --noEmit -p src/tsconfig.json exits 0. vitest run on the new spec reports 18 tests passed in 528 ms on node 22.23.4, and the two specs that already covered this file, guardedWrite.spec.ts and guardedWriteMutationGaps.spec.ts, reported 96 tests passed in 816 ms at the replaced head. The commit contains 1 file and 562 added lines and 0 executable lines, and git status reports 0 porcelain rows after the in-place mutation run restored guardedWrite.ts to blob 32ffe6cebadb2549e5ca564c648f74e333ff6e9b, which is the head blob it started from.

Reads these claims rest on. 355 of 355 rows in the before report and 355 of 355 in the after report were read for the counts. 56 of 56 blocking rows were read for the dispositions above. 33 of 38 seam rows carry their own hand-applied substitution and each produced a named failure, 1 of 38 died in the after run without one and is reported as a count, and 4 of 38 are carried as candidates, all 4 at line 501, columns 18, 31, 39 and 59. 16 of 56 rows carry the reasoning published in the previous round and are re-confirmed Survived rather than re-argued, and 2 of 56 changed status with no row of mine aiming at them. 863 of 863 lines of guardedWrite.ts were read for the blame that scopes ownership.

No review thread on pull 2359 was resolved by this comment, no thread was resolved by silence, and no re-review is requested.

Addendum to the row dispositions, put ahead of anything a reader would otherwise infer from the figures.

The commit that comment accompanies is test-only: it moves the width the mutation leg charges by 0 executable lines. Counted executable lines over main are 1259 at 7abba7f and 1259 at f32f7f7, on the edge whose base is upstream main tip efc22ed, counted by scripts/stryker-diff.mjs at the head being worked on. The 508-line figure is a different mode of the same accounting on the same edge: it is what the harness prints as the priced selection for the mode named tool, which restricts the selection to the one priced file core/tools/guardedWrite.ts, and it reads 508 at both heads. MAX_CHANGED_LINES is 500 at line 11 of that instrument, so the unit is 8 lines over the cap on its own footing and 759 lines over it as a merge candidate. Both figures are stated as figures, the mode that printed each one is named beside it, and no argument is attached to either.

Because the width does not move, the mutation-diff leg on pull 2359 is expected to end the way it ended before: the instrument throws in preflight before it writes any digest, and the readable payload is an exit code and one line reading Process completed with exit code 1, which is all that run 131003308488 printed in 36 seconds. That is an expectation about a platform colour, not a measurement, and I have not measured CIs leg at the pushed head.

Everything reported above as Valid 355, Killed 334, Timeout 1, Survived 20, No coverage 0 and blocking-status 20 is a local measurement I produced myself with the CLI invocation substituted, at named heads 7abba7f and f32f7f7, on a named footing: the worktree .tmp-b1-1404/wt-r350-2359split at f32f7f7, 0 porcelain rows, guardedWrite.ts at blob 32ffe6cebadb2549e5ca564c648f74e333ff6e9b and src/eslint-suppressions.json at blob f3714cd1f521c1d34e2dbc252cd7b970d226f6a6, both unchanged by the run. Those are counts of mutants in four buckets and not a score, they are mine and not CIs, and pull 2359 carries no mutation record comment to compare them against.

The 4 rows carried as candidates are candidates, not settled rows, and each motivation is one line naming the probe reading it rests on. line 501 column 18, conditional replaced with true: the conjunction is guarded first by the relative path itself and the probe returns the empty string, which is falsy, for the directory that is the workspace, so that operand never decides an outcome. line 501 column 31, the dot literal replaced with the empty string: the probe shows the empty spelling is the only one where the compared value equals a literal, and there the first operand is already false. line 501 column 39, startsWith replaced with endsWith: the probe returns the same answer for both spellings on the empty spelling and on a below-root chain, and the spellings where they differ are rejected by the containment verdict before this function is reached. line 501 column 59, the parent literal replaced with the empty string: the probe returns false for startsWith against the bare separator on all four spellings, so the prefix test answers the same way either way. The probe is r356-pathfacts.json, written beside these comments, and it records for the four parent spellings a workspace path and a target can form on this machine: the empty string for the workspace itself, sub backslash deep two levels down, the parent spelling one level up, the double parent spelling two levels up, and never the dot and never a leading separator. The after run scored the identical population, fingerprint 063e2d94cca2a05b over 355 rows, and returned these 4 rows Survived, which is the evidence that makes them candidates rather than my preference.

The row at guardedWrite.ts line 568 column 8 left the blocking count because the instrument records it as Timeout and BLOCKING_MUTANT_STATUSES at line 83 lists only Survived and No coverage. The instrument moved it out of a blocking status; I did not kill it, and the measurement I ran by hand on that row stalled 50104 ms before the test pool reported the worker forks emitted an error, which is consistent with a mutated climb that never ends but is not a kill.

r357 settlement: the 20 blocking mutation rows at 20eee8f. All 20 read at their file and line. 0 killed. 20 carried, each with the substitution that was applied by hand and the assertion a reader would have to add to tell the mutant from the original.

Before a reader forms an expectation. This round pushed a test only commit: one spec file, no source line. The width the mutation diff leg charges did not move by a line, so the hosted leg is expected to fail here exactly as it failed at the two earlier heads, with nothing readable but an exit code. Every figure below is a local measurement at a named head on a named footing with the mode named beside it. It is a settlement of what these tests do and do not distinguish. It is not a CI verdict, and CI at this head has not been read.

The shape of this round, said plainly. r356 settled 33 of 38 rows by quoting the failure a hand mutation produced. r357 settled 0 of 20 that way, and the work did not get easier, the method changed shape: all sixteen hand substitutions were re run over the three guardedWrite specs and every run printed 50 tests passed out of 50, so the only honest reading is that no assertion currently in these tests separates the mutant from the original. That is a finding about the tests, not a claim that these mutants do not matter. Each entry below therefore names the coordinate, the substitution, and the sentence a reader would have to be able to assert.

Head and diff. Head 20eee8f, parent f32f7f7, which is the head this campaign pushed in r356. It adds src/core/tools/tests/guardedWritePostCheckCancellation.spec.ts, blob 559f82db4cc95646de5b7cdea398cddd882e5998, 306 added lines, 3 tests. src/core/tools/guardedWrite.ts is byte identical to head blob 32ffe6cebadb2549e5ca564c648f74e333ff6e9b, re verified with git hash-object after every substitution.

The footing and the counts. Instrument scripts/stryker-diff.mjs, blob 7dfe0006d2d5c7e4d2282f65f68b8ed5f16866bc, the same blob that was in the tree at 7abba7f and at f32f7f7. Runner: node22 r351-price.mjs, base main tip efc22ed, head 20eee8f, mode tool, mutate yes, the mutate set restricted to core/tools/guardedWrite.ts, Stryker 10 with vitest 4.1.12, inPlace true, concurrency 2, related true. Preflight 33 s, whole run 282 s wall. Printed at this head: Valid 355, Killed 334, Timeout 1, Survived 20, No coverage 0, blocking 20. These are counts of mutants in four buckets and not a score.

Nothing moved. The same footing at f32f7f7 printed the identical tally, and the row by row comparison between 7abba7f and 20eee8f reads 334 Killed staying Killed, 20 Survived staying Survived, 1 Timeout staying Timeout. The population is the same 355 rows at all three heads: the sorted row key list built from file, line, column, end line, end column, mutator, replacement, hashed with sha256 to 16 hex characters, reads 8c9f16ec3e011384 at 7abba7f, at f32f7f7 and at 20eee8f, and the key lists are equal as multisets. This round names its digest recipe because the r356 comment published two digests computed under a different join that I did not re derive here, so the claim is multiset equality under the recipe above, not numeric continuity with those values.

Width, the cap, and which mode printed which figure. The same run counted 1259 changed executable lines over the edge from main tip efc22ed, the pull as it would merge, and priced 508 of them into mode tool, this one file as the priced unit. MAX_CHANGED_LINES is 500 at scripts/stryker-diff.mjs line 11 and MAX_MUTANTS is 400 at scripts/stryker-diff.mjs line 12, both read at the head being worked on. On its own file footing the unit is 8 lines over the limit, 508 against 500, and on the merge candidate footing the pull is 759 lines over it, 1259 against 500. The 508 is the mode tool figure, measured at 20eee8f, and the same 508 printed at 7abba7f and at f32f7f7.

Ownership. Whole file porcelain blame over src/core/tools/guardedWrite.ts attributes 13 of the 20 rows to commit 025fb7d and 7 to 5ff8435, and both commits are inside this unit, so 0 rows belong to a construct another unit owns. The blame was taken at f32f7f7 and it still describes this head because the new commit touched no source line in that file.

The 20 rows. All of them are in src/core/tools/guardedWrite.ts at blob 32ffe6cebadb2549e5ca564c648f74e333ff6e9b. Each line below is the coordinate, then the substitution as it was applied by hand to a copy of that blob, then the assertion a reader would have to add. Entries 1 to 10 and 15 to 20 were run; entries 11 to 14 are attributed to the probe that motivated them rather than to a substitution.

1. 85:9, BlockStatement, substitution replaced the block opened at line 85 column 9 with an empty block. To tell it apart a reader would have to assert on the module's own pending chain map, that the entry for a path is gone once the last write on that path has settled. Every outcome this module publishes about a settled chain is the same whether that entry was dropped or left, and the only exported window onto the map, resetChain at line 861, clears the whole map rather than reporting what is in it.
2. 86:8, ConditionalExpression, substitution replaced the tail test with false so the cleanup never runs. To tell it apart a reader would have to assert that the cleanup ran at all, which means asserting on the map rather than on order: an entry left behind is already settled, and enqueue chains a follower as prev then fn then fn, so a settled entry and a fresh resolved entry both schedule the next link in the same microtask.
3. 86:45, BlockStatement, substitution replaced the body of that tail test with an empty block. This is the same behaviour as row 2 reached one level in, so the assertion a reader would need is the same one, and it has to reach the delete rather than the test around it.
4. 87:5, CallExpression, substitution replaced the delete call with an empty statement. To tell it apart a reader would have to assert the map's contents after a settled write, because the caller's own promise and the next write's place on the chain are both unchanged by it.
5. 90:9, BlockStatement, substitution replaced the block opened at line 90 column 9, the rejected arm of the same cleanup, with an empty block. To tell it apart a reader would have to assert on the map after a path's last write ended in a rejection: an entry holding a rejected promise also runs the next link's function, because the chain attaches it to both arms.
6. 91:8, ConditionalExpression, substitution replaced the rejected arm's tail test with false. To tell it apart a reader would have to assert that a rejected tail is evicted while a replacement link keeps ownership. The two ownership tests at guardedWriteMutationGaps.spec.ts lines 192 and 228 assert the queue order, and a rejected entry left behind preserves that order.
7. 91:45, BlockStatement, substitution replaced the body of that test with an empty block. Same behaviour as row 6, one level in, and the same map level assertion is what would separate it.
8. 92:5, CallExpression, substitution replaced the rejected arm's delete call with an empty statement. Same assertion as row 4, on the map's contents after a write that failed.
9. 272:10, ConditionalExpression, substitution replaced the committed token test with true so the handler records even when the read under the lock returned nothing. To tell it apart a reader would have to assert on whether a record exists rather than on what the refresh reports: the only reader, committedTokenFor at lines 116 to 118, returns undefined both for a stored undefined and for a missing entry, and line 736 then takes the same recompute fallback either way.
10. 379:10, ConditionalExpression, substitution did the same on the create path's copy of the handler. To tell it apart a reader would have to add the same presence assertion: the seven durability tests at guardedWriteMutationGaps.spec.ts lines 345, 376, 392, 409, 424, 439 and 453 all assert the version the registry ends up holding, and it is the same version in both builds.
11. 501:18, ConditionalExpression, operand replaced with true. Attributed to the probe, not to a substitution. r356 measured what the path helper returns at this root for four spellings: the workspace itself, a target two levels below it, one level above and two levels above, and recorded relative as empty, sub then deep, the two dot spelling, and the two dot separator spelling. A reader would have to feed a spelling whose relative form differs between the operands, and for this row the differing input is the workspace itself, which the truthiness test on relative already answers before the operand is reached.
12. 501:31, StringLiteral, the single dot literal replaced with the empty string. Attributed to the same probe. A reader would have to assert against an input where the first operand is already false and the two literals answer differently, which means a spelling that never reaches this guard because containment refuses it at lines 443 to 450.
13. 501:39, MethodExpression, startsWith replaced with endsWith. Attributed to the same probe. A reader would have to feed an outside relative spelling, the only family where the two methods disagree, and those are refused before this guard runs, at lines 443 to 450 and 467 to 489.
14. 501:59, StringLiteral, the two dot literal replaced with the empty string. Attributed to the same probe. A reader would have to feed a relative chain that begins with a bare separator, which a below root relative never is; the probe's four spellings none begin that way.
15. 624:27, StringLiteral, the default kind value update replaced with the empty string. To tell it apart a reader would have to assert that the guard hands the kind somewhere a consumer compares against the update spelling. The file compares it in two places only, line 746 against edit and line 783 against create, and a scan of the identifier over the blob found 4 lines of which those are the only comparisons, so both answers are the same for the empty string as for update.
16. 690:7, ConditionalExpression, substitution replaced the whole post re check gate with false so it never refuses. To tell it apart a reader would have to assert when the refusal is produced rather than that it is produced. The three new tests record where the verdict lands, and it lands after the live publish on the same path had settled with exactly one writer call, in the head and in the substituted build alike, because the caller's promise is itself this write's entry on the chain, line 148.
17. 690:7, LogicalOperator, substitution joined the two operands with and, so only a cancel that moved both the latch and the fence would refuse. To tell it apart a reader would have to assert that the publish work never started: its first statement, line 712, applies the same test with the same message, and what the tests measure, the verdict, the message, the writer count and the arrival point, is identical in both builds.
18. 690:21, ConditionalExpression, substitution replaced the fence comparison inside the gate with false, leaving the latch alone. To tell it apart a reader would have to separate the fence from the latch at this gate rather than at the dequeue gate: the second new test cancels on the fence alone with the latch down, and it gets the same verdict under the substitution because line 712 keeps comparing the fence.
19. 741:30, LogicalOperator, substitution replaced the alternative operand with completeOverride and true. To tell it apart a reader would have to assert on the argument the guard hands observe, that it received a boolean and not an absent third value, because the receiver declares its completeness parameter with a default of true at src/core/task/observationRegistry.ts line 44 and stores the same flag for both.
20. 849:29, LogicalOperator, substitution did the same in the durability refresh path. Same assertion: the completeness tests at guardedWriteMutationGaps.spec.ts lines 409, 424 and 439 assert the stored flag, and the stored flag is the same under the substitution for a partial view, for no override and for an override of false.

The row in the Timeout bucket, 568:8, is not counted as blocking because the instrument does not treat Timeout as blocking: BLOCKING_MUTANT_STATUSES is Survived and No coverage only, at scripts/stryker-diff.mjs line 83. The instrument moved that row out of a blocking status; this campaign did not kill it, disable it, suppress it or exclude it. Its own hand substitution in r356 measured a vitest worker error after 50104 ms.

Local gates at 20eee8f, all run in the worktree the commit was made in: prettier check over the new spec and the two earlier guardedWrite specs exited 0; eslint with prune suppressions and max warnings 0 exited 0 and left src/eslint-suppressions.json byte identical to blob f3714cd1f521c1d34e2dbc252cd7b970d226f6a6; tsc noEmit over src/tsconfig.json exited 0. The three guardedWrite specs together printed 50 tests passed out of 50 at the head. No Stryker directive, no suppression entry, no exclusion and no change to the instrument was added in this round, and none is offered.

What is not measured, and is not claimed. CI at 20eee8f is unread: the required contexts check translations, platform unit test on ubuntu latest and on windows latest, compile, knip and e2e mock, with mutation diff advisory on this repository. mutation diff 131003308488 at the previous head failed in 36 s printing only Process completed with exit code 1, and whether a record comment rewrites after such a run is unmeasured. Also unmeasured: the typecheck beyond src, e2e and vscode e2e, the VS Code host, the 18 locale files, and job summaries that have been returning 0 bytes.

a green local preflight over Valid 0, Killed 0, Survived 0 and No coverage 0 with blocking 0 and advisories 2 is not evidence in either direction on this machine

the mutation leg is unmeasured, a PASS over an empty digest is not evidence in either direction, and CI at the first pushed unit is the only proof of the gate

Those two sentences are quoted from this campaign's standing rules and they apply to every figure above as written. The bucket counts and the 20 verdicts rest on all 20 rows read at their own coordinate in blob 32ffe6cebadb2549e5ca564c648f74e333ff6e9b plus the runs quoted beside them, and on nothing else.

What this leaves for a human to decide. Twenty rows that resist sixteen hand substitutions are no longer a mutant problem one agent can settle alone: either the tests have to start asserting the map, the record's presence, the argument value handed to observe and the moment a refusal is produced, or a maintainer has to say that those behaviours are not contract. The coordinates and the missing assertion for each are above, so the question can be put with its evidence rather than in the abstract.

Nothing on this pull is resolved by this comment, no re review is requested, and no exclusion is offered. The width question on this pull, its 322 review threads, and the record comment question stay where they were.

r358 settlement for pull 2359 at head 2c7460d

What this lane was asked to do and what it did

The ask was the review threads on this setting unit, taken from the file rather than from the review, at a ceiling of two token cores for the read. The read was bought once through the review-side door with a field-limited query that carried the thread roots, the comments under each root, the resolved flag and the root is-outdated flag, with every field name validated against the saved schema mirror before any point was spent: 10 thread fields, 11 comment fields and 1 pull field checked, 0 names absent from the mirror. Completeness was proven the way the previous lane proved it, by asking the same connection twice with opposite page directions and comparing the union by node id: forward with first 100 returned 83 of totalCount 83 with hasNextPage false, backward with last 100 returned 83 of 83 with hasPreviousPage false, union 83 by node id, 0 threads present in one direction only. Two GraphQL points, spent on the read and nothing else.

The count this lane had been writing, 322 threads, is wrong. The read says 83 thread roots, 70 of them resolved and 13 open, and 24 of the 83 flagged is-outdated by the platform while 0 of the 13 open ones are flagged is-outdated. Everything below works the 13 the read shows.

Classifier, named beside the counts

The classifier is the threads own isResolved and isOutdated flags from that read, crossed with whole-file porcelain blame over each file at the head the branch served when the read was taken, 20eee8f, and a read of the named construct at the reported coordinate in the blob that head serves. Against that classifier, of the 13 open threads: 0 rows describe code the head no longer carries, because every one of the 13 named constructs was found present at its reported coordinate in one of four files; 4 rows have their named construct living in another unit, line 687 of the text-writer blob on commit 1823e82 of split unit U1 of pull 1833, line 891 of that blob on commit 120cb05 of unit u5b, and both rows on line 613 of the json-writer blob on commit 3901239 of the utils lane; 9 rows are live against the current content on commits of this unit, 7 of them on commit 5ff8435 and 2 on commit dd899d0. Within the 9 live rows, 4 were closed by code, 5 remain owed.

The four rows closed by code, and the rows that prove them

Three edits landed at head 2c7460d. They close four threads because one edit has two independently tested halves.

• guardedWrite.ts line 163 thread. The reserved chain slot released its reservation at line 708 of blob b34fcdd64b02 while an earlier write to the same path still held the chain, so the slot work promise was rejected before its own chain entry could await it, and Node reports an unhandled rejection when the first handler attaches on a later turn. The handler is attached at creation instead, at line 152. The row is the fourth test in guardedWritePostCheckCancellation.spec.ts; run against the unchanged head 20eee8f it failed, printing that the captured unhandled list held one entry named Task was cancelled before this write ran -- the queued publish is not performed while the assertion demanded none. It also asserts the refusal still reaches that caller and that the doubled writer ran once, so the added handler did not swallow the verdict.
• guardedWrite.ts line 736 thread. At line 747 of the same blob the durability-failure refresh now reports only a token measured while the publish still held the lock; the fallback that re-read the file after the release is gone. The comment above the record already said the refresh should report the fact it measured rather than guess a value that may already have changed, so the code did not match its own comment. The row asserts 2 token reads and that the observation still holds the token the task was shown; run against the unchanged head it failed, printing that the token computation was called 2 times expected and 3 times actual.
• fileLock.ts lines 206 and 208 threads, one edit, two halves. At lines 206 to 220 of blob baff4b242dbb a failed lock-key re-derivation releases the lock and propagates instead of being swallowed into the key it was meant to confirm, which had let the callback run while holding a lock that no peer reaching the file by its canonical spelling contends for. An absent leg is not a passed leg, and a failed inspection is not evidence that the key stood still. At line 228 a release failure on the retarget path is reported with the key this call could not give up and with the error object itself instead of being discarded, because the lock may still be held and a peer waiting on that key needs to know which key and why rather than waiting out the staleness timeout unexplained. Two rows, one per half: the first asserts the inspection failure reaches the caller, that exactly one acquisition happened, that the lock was released and that the callback never ran, and pre-fix printed that no thrown value was reported where the EACCES inspection failure was demanded; the second asserts the retarget and the callback still run under the new key in that order and that exactly one report exists naming the stale key and carrying the release error, and pre-fix printed that 0 reports existed where 1 was demanded.

Test footing for all four rows: the vitest 4.1.12 run over the utils directory plus the four guardedWrite specs, from the src package of the worktree, printed 54 test files passed, 993 tests passed and 5 skipped in 4.94 seconds at head 2c7460d, logged to r358-postfix-utils-and-guardedwrite.log beside this lane. Each of the four rows was run against the unchanged head 20eee8f first and failed as quoted above, logged to r358-prefix-three-specs.log, so none of the four is a row that passes whether or not the fix is present.

Gates at the commit, and what they do not reach

prettier check over the five touched files exits 0, printed by the prettier entry in the worktree node_modules. eslint with prune-suppressions and max-warnings 0 over the same five files exits 0 and left src/eslint-suppressions.json byte identical to blob f3714cd1f521c1d34e2dbc252cd7b970d226f6a6 after the run, verified by hashing the file after the prune and restoring it when the prune rewrote it. tsc noEmit over src/tsconfig.json exits 0 with no output, printed by typescript 5.9.3. No Stryker directive, suppression entry or file exclusion was added anywhere in this lane.

Typecheck beyond src, the e2e and vscode-e2e suites, the real VS Code extension host, the 18 locale files and the job summaries, which return 0 bytes on this pipeline, are not measured by anything in this lane.

Width at the head this pull now carries, both footings, both printed by the same instrument

The instrument is scripts/stryker-diff.mjs blob 7dfe0006d2d5c7e4d2282f65f68b8ed5f16866bc, run over a clean detached checkout of 2c7460d against merge base and main tip efc22ed, re-measured here rather than carried over from the previous head.

• File footing, mode tool, the footing the priced unit uses: 513 priced changed executable lines against MAX_CHANGED_LINES 500, over the line cap by 13. At the previous head 20eee8f the same mode printed 508, over by 8.
• Merge candidate footing, mode all, every changed file in a priced package: 1275 counted and priced changed executable lines against the same 500, over by 775. At the previous head the same mode printed 1259, over by 759.

Three correct review fixes moved the priced width upward by 5 lines on a file that was already over the cap, and that movement is recorded here rather than in a lane note because it is information for whoever decides whether this unit splits or is excluded. The instrument was not adjusted, the cap was not adjusted, and no line was removed to make the number look smaller.

A reader would otherwise guess this wrong, so in plain words: the advisory mutation-diff leg fails on width, before it can produce a single mutant. The instrument throws over the per-package line cap at line 265 of scripts/stryker-diff.mjs, which is in the manifest build, and the Stryker call at line 406 runs only for packages the manifest already accepted, so a package that is over the cap never reaches mutant production and no mutant is ever produced to be killed or survived. Three correct review fixes therefore cannot make that leg green while the width question is open, and no number of further review fixes can, because the leg is not reading behaviour.

What the hosted legs actually reported at this head, read anonymously by job and run

The commit check-runs door answered anonymously at 200 for this head, and the required legs are named here by job and run id, all read on 2026-11-12 from the suite started 2026-11-12T10:56:21Z:

• compile, run 131136926259, completed success at 10:59:57
• platform-unit-test ubuntu-latest, run 131136926090, completed success at 11:01:47
• platform-unit-test windows-latest, run 131136925552, completed success at 11:02:23
• check-translations, run 131136925639, completed success at 10:56:57
• knip, run 131136925666, completed success at 10:57:30
• e2e-mock, run 131136925874, completed success at 11:01:26
• mutation-diff, run 131136925056, completed failure at 10:56:57, 36 seconds, with two annotations, one reading Process completed with exit code 1 at .github line 12 and the other a runner label migration notice, so the leg prints no width line, no package name and no mutant count, and the job summary is empty
• extension-host-visual, run 131136925781, still in progress at the time of this read
• CodeRabbit, run 131136278032, conclusion skipped

The six required contexts this pull needs are therefore green at 2c7460d on the platform, and the only completed failure is the advisory mutation-diff, whose 36 seconds are consistent with a throw before mutant production, though the leg prints only an exit code so the cause is read from the instrument and not from the log. the mutation leg is unmeasured, a PASS over an empty digest is not evidence in either direction, and CI at the first pushed unit is the only proof of the gate. The CI sentence is now satisfied for the required legs and is not satisfied for the mutation content, because a red advisory leg that produced no mutants measures nothing about behaviour.

The 13 threads, answered

Thirteen replies went to thread roots, one for each open thread, and four threads were resolved. Every reply was quoted to its thread root comment, with the root ids taken from the read artifact r358-threads-first.json rather than from memory, and each reply carries a fact, a decision or a correction rather than thanks. 4 threads were resolved, guardedWrite.ts lines 163 and 736 and fileLock.ts lines 206 and 208, and they are the 4 the code closes. 9 stay open: the 4 whose named construct lives in another unit, at lines 687 and 891 of the text-writer blob and twice at line 613 of the json-writer blob, and the 5 live rows this unit owns but does not fix here, the parent directory left behind at line 249 whose remedy is carried by the follow-up on issue 2350, the optional revalidation hook at line 338 which is a contract question because a whole-tree search found 0 production call sites outside the module and all 4 call sites inside it passing the hook, the lexical-parent fallback at line 74 of the lock blob whose carrier is the follow-up on issue 2357, and lines 588 and 595 of the text-writer blob whose remedies are the post-mkdir re-walk planned as its own unit and the ancestor ruling carried by the follow-up on issue 2350. Nothing was resolved by silence and nothing was resolved that is not decided and fixed. No re-review is requested.

Two of the 13 are the same coordinate asked twice, both at line 613 of the json-writer blob, and both were answered and left open rather than resolved, because the change belongs to commit 3901239 and the disposition is the fail-closed permissions question tracked on issue 2406, which a human owns.

What is not evidence here

a green local preflight over Valid 0, Killed 0, Survived 0 and No coverage 0 with blocking 0 and advisories 2 is not evidence in either direction on this machine. That preflight print is the r357 footing on the previous head, and the local leg re-run at 2c7460d had its preflight exit 0 in 30 seconds with its mutant phase still running when this body was cut, so the four mutant buckets at this head are still unmeasured locally and no bucket figure is quoted in this body. Where bucket figures are quoted in this campaign they carry the line These are counts of mutants in four buckets and not a score.

Two facts this lane learned by being blocked, recorded because a lane should measure before it guesses. The reply door wants the numeric comment id, not the node id, and the node id decodes by messagepack into a type index, this repository id 1219468224, and that numeric id, for example the root of the guardedWrite line 163 thread, PRRC ending DMHf6w, is comment 4508999659. And the author login differs between the two doors, coderabbitai on the review-side door and the bot-suffixed form on the REST door, which is how a match key silently finds nothing and reports an empty result. A batch of 13 posts to the wrong identifier form billed 0 cores by this lanes own rate read, taken immediately after them and reading core remaining 5000 used 0, and that stands as a measurement on this host rather than as a rule for the platform.

Not measured, and stated so it is not mistaken for measured: the mutation content at this head, locally and hosted, since the hosted leg produced no mutants and the local leg had not reached its bucket tally when this body was cut; CI on any head after this one; typecheck beyond src; e2e and vscode-e2e; the VS Code host; the 18 locale files; and whether a record comment rewrites itself after a failed run.

Addendum to comment 6821901219 on pull 2359, the local mutation leg at head 2c7460d

That body said the local leg had not reached its tally when the body was cut. It has now, on a clean detached checkout of 2c7460d, same instrument scripts/stryker-diff.mjs blob 7dfe0006d2d5c7e4d2282f65f68b8ed5f16866bc, same base efc22ed, mode tool, related true, inPlace true, concurrency 2, preflight exit 0 in 34 seconds and run exit 0 in 212 seconds. These are killing-stage counts of mutants in four buckets and not a score: valid 354, killed 331, timeout 1, survived 22, no coverage 0, blocking 22. Blocking counts Survived and NoCoverage only, which is line 83 of that instrument, so the single timeout is not part of the 22.

The head it replaced, 20eee8f, printed 355 rows with 20 blocking on the same footing and the same priced file. The blocking set therefore got two rows larger rather than smaller. Three correct review fixes changed which mutants are covered and how many exist; that is information about the state of this unit, not a result to be spun either way, and it moves in the same direction as the width movement the settlement records.

Row level, kept in the same breath as the tally: one row moved from blocking to killed, one moved from killed to blocking, eight blocking rows carried, and eleven rows present only at the new head pair one for one with eleven rows present only at the old head at coordinates shifted by the 7 and 11 lines these edits add to the priced file. This lane records that pairing as an artefact of matching textually identical blocks, of which the priced file has several, and not as knowledge of which rows its own fixes killed. The mutant population digest is c7ab7759f26c9aea over 354 rows against 28f97e80e592304a over 355 rows at the previous head, computed by sha256-16 over sorted row keys of file, start line, start column, end line, end column, mutator and replacement. These are counts of mutants in four buckets and not a score.

Two figures in this record are labelled so a reader does not have to guess. The 1569 priced lines for mode all is a discarded measurement: it was taken against this same head while a stranded local run was mutating the working tree, and it is the evidence for measuring widths in a clean checkout rather than trusting a dirty one. The clean-checkout measurement is 1275 counted and priced changed executable lines for mode all and 513 for mode tool against the 500 cap, both printed by the same instrument at this head.

What this addendum does not change: the hosted advisory mutation-diff leg, run 131136925056, still failed in 36 seconds on width before producing any mutant, so it measures nothing about behaviour, and a green local preflight over an empty digest is evidence in neither direction on this machine. The six required hosted legs are green at this head and stay green. No Stryker directive, suppression entry or file exclusion was added anywhere in this lane, and no re-review is requested.

What is holding this pull today, and the one thing it needs from a human

Read today, 2026-11-12, against the head this branch carries. Every count below names the door it was read from and the time it was read.

• Head and base. Branch vps2f-1914-u5a carries head 2c7460d with base main at efc22ed, 27 files, 10943 additions and 79 deletions, the pull last updated 2026-11-12T16:28:57Z. The anonymous door printed these on the pull object at 17:36:56Z and the review-side door printed the same head, base and shape on its own read a few minutes earlier. The review-side door reports review decision changes requested, merge state blocked and mergeability mergeable, so what holds the merge is the verdict and the review requirement, not a conflict.

• The verdict in force was not written against this head. The newest change-request review on this pull is review 5841795945, written by coderabbitai at 2026-11-10T12:29:22Z against commit ebd6d9e. That commit is an ancestor of the head, measured in git at 0 metered cost, where merge-base of the two is that commit itself and 18 commits sit between them. The first of those 18 is a merge commit, 022bd3a, dated 2026-11-12T03:45:10Z, whose two parents are that commit and today upstream main tip efc22ed, which the door dates to 2026-11-12T01:33:38Z. The branch took today main tip by that merge and not by a rebase, and four commits followed it, dated 2026-11-12T05:48:23Z, 09:29:52Z, 09:50:22Z and 10:21:59Z.

• Nothing since has replaced that verdict. The review listing was read in three pages at 17:37Z today, 2026-11-08T07:17:54Z through 2026-11-12T16:29:06Z, the pages holding 100, 100 and 95 events, the last page returning fewer than the page size so no further page exists. On that last page 5 events are change-requests and 90 are comments, and the newest change-request on it is the 2026-11-10 row named above. Four change-requests dated 2026-11-08 sit earlier in the same listing against commit 025fb7d and none of them is the standing verdict either.

• The six contexts the ruleset decides on all read success at this head. The check-run listing for this head returned 96 rows against a page size of 100 at 17:38Z today, so the listing is complete, and the six required ones are, each with the identifier the door printed and the minute it finished: check-translations, 131136925639, success at 10:56:57Z. compile, 131136926259, success at 10:59:57Z. knip, 131136925666, success at 10:57:30Z. e2e-mock, 131136925874, success at 11:01:26Z. platform-unit-test on ubuntu-latest, 131136926090, success at 11:01:47Z. platform-unit-test on windows-latest, 131136925552, success at 11:02:23Z. The advisory mutation-diff leg, 131136925056, completed failure at 10:56:57Z; it is not one of the six and it does not block a merge.

• The open review threads are answered and none of them reports moved coordinates. Read at 16:19:46Z today against this same head, the review-side door returned the connection own total of 83 threads with no next page: 74 resolved, 9 open, and 0 of the 9 open carry the outdated flag. The earlier complete read at the previous head f32f7f7 counted 24 outdated flags across the same 83 threads and 0 of those 24 sat on open threads. All nine open threads carry a reply from this campaign; the last six were published between 16:28:27Z and 16:28:39Z today and the reviewer answered each within thirty seconds without asking a further question.

• What this campaign can do and cannot do. Content and answers are ours. The verdict is not. This campaign cannot dismiss a change-request it did not write, and it cannot request a reviewer; both are actions on this repository that need a human with standing on it. So this is addressed to the three accounts the door lists in the request field today, taltas, edelauna and JamesRobert20, with no team requested: read the nine open rows against this head, and either dismiss the 2026-11-10 verdict or re-review at this head.

• One disagreement recorded here so nobody has to rediscover it. The tracking issue 1991 carries an operative re-cut order of 1910, 1911, 1912, 1913, 2433, 2383, 2384, 2357, 2359, 1915, 1916, 1918 and 1917, while this pull body line 1 declares main, then pull 1913, then pull 2357, then this unit; the two readings disagree about whether 2433, 2383 and 2384 land before 2357 and 2359 or immediately after 1913.

Nothing here resolves a thread, claims anything about the reviewer saved state, or asks this campaign for another change.