3 Commits

Author	SHA1	Message	Date
Tom Boucher	929e02cb2c	enhance(#3885): no silent swallow, and no verdict manufactured from dropped data (#3925) ... * test(#3885): failing-first coverage for the depth bound and the manufactured wave verdict ADR-3473 §8.5 says a swallowed failure may not become an authoritative-looking answer. Three families do exactly that today; this commit pins each one RED. Measured on this tree, 2026-08-27: intel query, .planning/intel/file-roles.json nested 12000 deep -> exit 1, "Error: Maximum call stack size exceeded" searchJsonEntries / matchesInValue carry no depth parameter at all. The MAX_JSON_SEARCH_DEPTH = 48 bound existed in the retired SDK lineage (sdk/src/query/intel.ts at 11918dcc3^) and the surviving .cts lineage never received it. same fixture nested 48 and 49 deep -> both return total=1 at exit 0, truncated=undefined Nothing distinguishes "searched to the bottom" from "stopped looking". query phase-plan-index, a plan whose depends_on names an unresolvable token -> warnings: ["Plan 03-02: declared wave: 2 but depends_on DAG places it in wave 1"] The token is never mentioned. computeDependencyLevels drops the edge with `if (!resolvedDep) continue;`, every plan becomes a root, and the tool then reports the author's correct wave: as the thing that is wrong. countPhasePlansAndSummaries with fs.readdirSync throwing EACCES -> hasContext:false, indistinguishable from a phase that simply has no CONTEXT.md. context_read_error is undefined. The shapes these tests assert against, chosen here so the implementation has a target rather than inventing one later: `truncated: boolean` on the intel query result, `unresolved: Array<{plan, token}>` from computeDependencyLevels, and `context_read_error: string | null` per analyzed phase. Deliberately green, and they must stay that way — each stops the fix from over-firing: depth 48 is found and NOT flagged truncated (the ceiling is inclusive) a shallow miss reports no truncation (noise control, N1) 10,000 siblings at depth 2 are unaffected (the bound is DEPTH, N2) a genuine wave: mismatch on a fully-resolved DAG still warns (N3) a genuinely missing directory is absent, not an error the emitted depends_on display mapping still passes an unresolved token through verbatim — already pinned by the existing #3785 test, so no duplicate was added T31 asserts at the consumer's output per ADR-3180 Decision 4(b): it runs the real CLI and reads the emitted JSON, because a unit assertion on computeDependencyLevels would have passed throughout #3427's life. Design: .gsd/phase/feat-3885-no-silent-swallow/40-design.md Test matrix: .gsd/phase/feat-3885-no-silent-swallow/50-test-matrix.md Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * enhance(#3885): no silent swallow, and no verdict manufactured from dropped data Implements ADR-3473 §8.5. A failure or a gap in the input stops being absorbed into an output that reads as authoritative. The recursion bound, restored but NOT verbatim (src/intel.cts) MAX_JSON_SEARCH_DEPTH = 48 is threaded through searchJsonEntries and matchesInValue, which carried no depth parameter at all. The bound existed in the retired SDK lineage (sdk/src/query/intel.ts at 11918dcc3^) and the surviving .cts lineage never received it — §8.3's "a consolidation may not delete an invariant along with the surface that held it", demonstrated. Measured before: a .planning/intel file nested 12000 deep exits 1 with "Error: Maximum call stack size exceeded". Reachable from a project document. The original returned a bare `false` at the ceiling. Restoring that verbatim would trade a crash for a silent "no match" when the truth is "I stopped looking" — the same class this epic exists to close, and ADR-3473 Decision 4 forbids it. So the bound carries a truncation signal: nesting 47 -> found, truncated false nesting 48 -> found, truncated false (the ceiling is inclusive) nesting 49 -> not found, truncated TRUE nesting 12000 -> exit 0, truncated TRUE, no RangeError A shallow document that simply has no match reports truncated FALSE — the flag means "I stopped early", never "I found nothing", or it would be noise. The bound is on DEPTH: 10,000 siblings at depth 2 are unaffected. The dropped edge is named, and stops being blamed on the author (src/phase.cts) computeDependencyLevels dropped every unresolvable depends_on token with a bare `continue`. Each drop makes a plan a root, so the whole phase collapses to wave 1 — and cmdPhasePlanIndex then reported the author's CORRECT wave: as the thing that was wrong. Before: warnings: ["Plan 03-02: declared wave: 2 but depends_on DAG places it in wave 1"] After: warnings: ["Plan 03-02: depends_on token \"nonexistent-token-3427\" does not resolve to any plan in this phase — edge dropped, wave placement for this plan may be unreliable"] The suppression is PER PLAN, never blanket: a plan with a fully-resolved DAG and a genuinely wrong wave: still gets the mismatch warning. resolveDependencyId stays two-tier — the shortFormToId third tier is §8.3/Phase 6's rule and is deliberately not built here. The emitted depends_on display mapping still passes an unresolved token through verbatim (#3785). No artifact from failed inputs (gsd-core/workflows/review.md, #3352) A failed lane leaves no result file, so "every lane failed" is exactly "the aggregate JSONL has zero lines" — the gate condition already existed as a byproduct. REVIEWS.md is no longer written in that case, and the commit step is skipped with it. A budget-SKIPPED lane also leaves no file and is NOT counted as a failure. Per-lane output and non-empty .err are preserved to .review-diagnostics/ before `rm -rf "{run_dir}"` destroys the only record that the lanes failed at all; the commit step names one file, never a glob, so the diagnostics are not swept in. Unreadable is not absent (roadmap.cts, gap-checker.cts, init.cts x2) Four callers collapsed an EACCES on a phase directory into [] and reported hasContext:false — byte-identical to a phase that simply has no CONTEXT.md. Each now names the directory it could not read. A genuinely missing directory stays absent rather than becoming an error, which is what keeps the fix from over-firing. Fatal errno folded into a retry set: audited, no defect found Reported as a verified negative rather than padded with a change. withPlanningLock was fixed by #1884/PR #3472; acquireStateLock by #3776; atomicRenameWithRetry and estimate-cli's renameWithRetry are correct by construction — bounded set {EPERM,EBUSY,EACCES}, bounded attempts, and they return or rethrow the final error rather than swallowing it. estimate-cli's sole caller surfaces that rethrow as write_error in its JSON output. Manufacturing a diff to make the checkbox look worked-on is the Goodhart outcome Decision 6 exists to prevent. Disclosed: R46 (the commit step names one file, never a glob) is a real regression guard but is NOT independently failing-first — the commit fence is byte-identical pre- and post-fix, so it only fails pre-fix through its shared extraction dependency. Recorded rather than claimed as fail-first. Design: .gsd/phase/feat-3885-no-silent-swallow/40-design.md Test matrix: .gsd/phase/feat-3885-no-silent-swallow/50-test-matrix.md Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#3885): escape untrusted tokens, and stop cleanup destroying unpreserved evidence Two review findings, both real, both in my own change. An isolated adversarial review found the evidence-preservation block never checked mkdir/cp exit status while `rm -rf "{run_dir}"` ran unconditionally in a SEPARATE fenced block. A disk-full or unwritable phase directory therefore still destroyed the only copy of the failed lanes' output — reintroducing the exact #3352 data loss this item exists to stop, inside the fix for it. Preservation and cleanup are now one block, because each fenced block is a separate execution and a shell variable cannot carry between them. mkdir -p and each cp are exit-checked; cleanup runs only when preservation succeeded, and a failure warns naming the intact run directory. "Nothing to preserve" is not a failure and still cleans up. Driven three ways: success removes run_dir, failure leaves it intact with the warning, nothing-to-preserve removes it. The failure is induced by a file-vs-directory conflict rather than chmod 0o000, which root bypasses. The new unresolved-depends_on warning embedded a user-authored token verbatim: warnings: ["Plan 03-02: depends_on token \"evil Plan 03-01: FORGED WARNING\" does not resolve ..."] The JSON wire form is safe, and the security reviewer judged it non-exploitable for that reason. It is escaped anyway through formatDiagnosticToken — the helper #3884 added one phase earlier for exactly this class. warnings[] is an array a consumer naturally prints line by line, and not reusing the sibling fix is the generative-fix-divergence shape this epic exists to close. The same treatment is applied to context_read_error / phase_dir_read_error, which embed a phase directory path a repository can choose, and to the fs error message, which echoes the raw path itself. Known limit L5 recorded: the bound is on DEPTH only. A 300,000-element shallow array yields a 14.5MB reply with truncated:false. Correct per §8.5 and per negative space N2, disclosed rather than left to be discovered. Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#3885): unreadable is not absent in intel.cts either, and a corrupt snapshot is not "no snapshot" Blocker from the round-2 isolated review, and it is my own inconsistency: this phase applied "unreadable is not absent" to phase directories and left it broken in the file it was already editing. chmod 000 .planning/intel/file-roles.json gsd-tools intel query <term> -> {"matches":[],"total":0,"truncated":false} exit 0 safeReadJson swallowed every read failure and returned null, so an EACCES was byte-indistinguishable from an absent file AND from a genuine no-match. Now it separates three states: ENOENT stays silently absent, because not every project has every intel file and intelQuery loops over all of them expecting misses; EACCES/EIO and malformed JSON are both surfaced naming the file. A corrupt intel file previously read as "no matches" too — same defect, same fix. Threading that outcome through the other three callers found something worse than the reported case. intelDiff returned no_baseline:true for a corrupt or unreadable snapshot — not a silent failure but an actively FALSE verdict, telling the caller they never took a snapshot when they did. That is §8.5's headline case, so it is fixed and tested rather than noted. intelStatus and intelApiSurface collapsed the same way; intelApiSurface additionally printed a "not yet populated" banner that was simply untrue. Every row is failing-first, including the absent-file ones — the field is new, so it does not exist pre-fix at all. Those rows are not pre-fix pins; they pin that the fix does not OVER-fire on the ordinary absent case, which is what would turn this into noise on every project lacking an intel file. IO failure is injected by monkeypatching fs and restoring in finally, never chmod 0o000 — root bypasses mode bits, so the reviewer's manual chmod repro is not reproducible as a test. Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * test(#3885): build the pathological intel fixture as text, not by stringifying a nested object The remote runner came back red on Linux with two failures, both T4: deeplyNestedIntelDoesNotOverflowTheStack, while the same test passed on macOS. The product was never at fault. writeNestedFixture(12000) built a 12,000-deep JavaScript OBJECT and then JSON.stringify'd it. JSON.stringify recurses once per level, so it overflowed the TEST PROCESS's stack — the error was thrown before the CLI was ever spawned. Linux's container stack is smaller than macOS's, which is the whole of the platform difference. Measured, with the same document built as JSON TEXT so nothing in the building process recurses: depth=100 rc=0 truncated=true depth=5000 rc=0 truncated=true depth=12000 rc=0 truncated=true depth=60000 rc=0 truncated=true V8 parses this shape iteratively; only stringify recurses. The bound works at every depth tried. The fixture is now built by string concatenation. That is also the more faithful input — a real deeply nested JSON document on disk is exactly what the bound guards, where a stringified object was only ever a way to produce one. The depth stays 12000. Lowering it would have made the test pass by weakening it to accommodate a fixture bug, and 12000 is a legitimate pathological input the product handles. T4 remains a genuine fail-first: rebuilt against the parent of the commit that added the bound, the string-built depth-12000 fixture still drives the CLI to rc=1 with "Error: Maximum call stack size exceeded". A comment records why the fixture is text, so it is not "simplified" back into a macOS-green / Linux-red test. Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * chore(#3885): backfill the changeset PR number Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * test(#3885): normalize path separators before splicing into the workflow's bash CI red on one lane — test (windows-latest, 24, shard 3/3). macOS, Linux and the remote runner were all green. AssertionError: commit must name the single REVIEWS.md file; got: --files C:UsersRUNNER~1AppDataLocalTempgsd-3352-phasedir-mOKmuy/03-REVIEWS.md Every backslash in C:\Users\RUNNER~1\AppData\Local\Temp\... was eaten. The harness spliced an OS-native temp path into the extracted bash, and bash consumes \U, \A, \L and \T as escapes on an unquoted expansion. The same loss broke RUN_DIR, so "rm -rf" targeted a path that never existed and the run directory survived — which is the other two assertions. This is a fixture defect, not a product one, and that was checked rather than assumed. In production the phase directory is toPosixPath-normalized at every call site that serializes it (bin/lib/init.cjs:951, 1381, 1461, 1529, 1595), and the run directory is created by "mktemp -d" running inside the bash block itself (gsd-core/workflows/review.md:163), which emits POSIX-style output even under Git-Bash on Windows. Neither ever carries a backslash where the workflow reads it. The file's pre-existing #3034 harness splices raw native paths too, but only ever inside double-quoted assignments, so it never tripped this — my new harness followed that convention faithfully into the one place where it does not hold. Both now splice through toPosixPath from shell-command-projection, the established seam, which is a no-op on POSIX and mirrors what production does. No assertion was weakened. "commit must name the single REVIEWS.md file" and "the run dir must still be destroyed" still assert exactly that; only how the fixture supplies its path changed. Nothing is skipped on Windows — a t.skip() here would have hidden the question of whether the exposure was real, which is the question that mattered. Driven both ways: a synthetic C:\Users\RUNNER~1\... input reproduces the exact CI string when unfixed and yields C:/Users/RUNNER~1/... when fixed; a POSIX input produces a byte-identical shape, proving the normalization is idempotent. Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * test(#3885): stop the harness making the deleted run dir its own cwd Windows shard 3/3 stayed red after the separator fix, on two assertions the separator fix never touched: AssertionError: the run dir must still be destroyed AssertionError: nothing to preserve is not a failure — run dir must still be removed The separators were a real bug and fixing them fixed the --files assertion. They were not this bug, and two CI cycles went into the wrong axis before I stopped converting path forms and looked at what the harness actually does. runWriteReviewsFlow passed cwd: runDir to runHook, so the child bash process's working directory WAS the directory the block under test then removes with rm -rf "$RUN_DIR". POSIX allows a process to delete its own cwd — verified locally, cd "$d"; rm -rf "$d" removes it cleanly — and Windows does not: a live process's working directory cannot be removed. So on Windows the directory survived and both assertions failed, on macOS and Linux it vanished and they passed. Nothing to do with slashes. Harness-only. Production never cd's into the run directory; every reference is by absolute path, and RUN_DIR is created by mktemp -d inside the bash block itself (gsd-core/workflows/review.md:165) rather than injected. review.md is unchanged. Fix: the child now runs with its cwd in an unrelated temp directory that the block under test never deletes. Neither assertion was weakened, and nothing is skipped on Windows — the tests in this file carry no platform guard and run there unconditionally, which is how this surfaced at all. Honest limit: the Windows failure mode cannot be reproduced on macOS, because POSIX permits the very thing Windows refuses. The diagnosis is grounded in that documented divergence and in the fact that only the Windows lane failed, but the green outcome on windows-latest is unverified until CI runs it. Refs #3885 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Opus 5 <noreply@anthropic.com>	2026-08-27 04:12:47 -04:00
Tom Boucher	fb9823e1e1	fix(#3689): refuse a ledger write when the rendered table disagrees with its JSON (#3828) ... * test(#3689): failing-first coverage for the ledger table/JSON agreement guard `.planning/WINDOWS.md` renders its markdown table from the fenced JSON that is its source of truth, but nothing checks the two still agree before a write overwrites the table. `windows append` / `waive` / `fixed` therefore discard a drifted cell silently, and erase a table-only row entirely, both at exit 0. Adds to tests/broken-windows.test.cjs: - five refusal cases that fail today, covering all three write commands, a drifted cell, a table-only row, and drift on a non-first row; each asserts the typed reason via GSD_JSON_ERRORS and that the file is byte-identical after the refusal, so a guard that refuses only after writing cannot pass - six anti-tightening pins that must stay green: an agreeing ledger, the first-write ENOENT path, #2893 trailing-prose preservation, #3657 3-backtick fence tolerance, escaped pipes and backslashes in a description, and the zero-entry placeholder table - a fast-check property pinning the round trip the guard depends on — extractTableRegion(renderLedger(l)) === renderTable(l.entries) — because a false refusal on a clean ledger would be worse than the bug Fixtures are built by running the real CLI and then perturbing only the table, so frontmatter and JSON stay consistent and the pre-existing counts cross-check still passes; a hand-written ledger would pass these for the wrong reason. Refs #3689 * fix(#3689): refuse a ledger write when the rendered table disagrees with its JSON `.planning/WINDOWS.md` renders its markdown table from the fenced JSON that is its source of truth, and `writeLedgerAtomic` regenerated that table on every `windows append` / `waive` / `fixed` without ever checking the two still agreed. A hand-edited cell was silently reverted; a row that existed only in the table vanished entirely. Both at exit 0, with nothing on stdout to say so. The write seam now compares the on-disk table against `renderTable(<entries parsed from the on-disk JSON>)` before regenerating anything, and refuses with a typed `windows_ledger_table_drift` error naming the drifted row ids and the remedy. Because the check sits at the single write seam, all three commands inherit it, and the file is left byte-identical on refusal. Deliberately not enforced in `parseLedger`: hardening the read would break `windows status` and the ship gate on exactly the ledgers an operator needs to inspect to diagnose the drift. Two hazards handled explicitly, both discovered in review of the first draft: - The pre-image read now distinguishes ENOENT from every other errno, per the #1950-H2 fail-closed-on-unreadable invariant `readLedgerOrNull` already honors. A bare catch would have let an unreadable pre-image skip the guard and write anyway. - Both the entries baseline and the table extraction pass the pre-image's own frontmatter `total_count` to `locateJsonBlock`. Without that hint the no-expectation fallback binds to the LATEST fenced JSON array in the file, which is the operator's prose block whenever that prose contains one — the exact case #2893 exists for — refusing every write on a ledger that never drifted. A regression test covers it. Also extends the CONTEXT.md Broken Windows Ledger glossary entry: the table is a third projection of the same source, cross-checked at the write seam, and the frozen REASON enum gains WINDOWS_LEDGER_TABLE_DRIFT. Fixes #3689 * fix(#3689): bind prose preservation to the pre-image's own ledger block Found while reviewing the table drift guard: the #2893 trailing-prose preservation in `writeLedgerAtomic` passed `ledger.total_count` — the POST-mutation count — as the disambiguation hint for a lookup over the PRE-image. On an append the pre-image holds N entries while the hint says N+1, so the hint can never match and `locateJsonBlock` falls through to its last-array-shaped-span fallback. When the operator's trailing prose itself contains a fenced JSON array — the ordinary case #2893 was written to protect — that prose block wins the fallback. The preserved region is then computed from the prose fence rather than the ledger fence, and everything between them, including the operator's own text above the array, is silently dropped on the next write. Reproduced against the real CLI: a prose block reading "Operator notes above the array, IMPORTANT DO NOT LOSE THIS TEXT." plus a fenced 3-element array came back empty after one `windows append`. Both the prose lookup and the drift guard now share one pre-image-derived `preImageExpectedTotal`, taken from the pre-image's own frontmatter, so they bind to the same and correct block. The existing trailing-prose regression test is strengthened to assert the prose survives byte-for-byte rather than merely that the command exited 0 — asserting only the exit code is why this was invisible. Refs #3689 * fix(#3689): anchor table extraction on the header row, not a line-prefix scan Independent review found the drift guard could brick a ledger nobody had hand-edited. `validateDescription` accepts a description containing a raw newline, and `renderTable`'s cell escaping covers backslash and pipe but not newlines — so such a description renders a row that physically spans two file lines, the second of which does not begin with `|`. `extractTableRegion` bounded the table by walking backward over the contiguous run of `|`-prefixed lines, so it stopped at that split. In the common case where the row's tail is the last line before the fence it returned null, and every subsequent append/waive/fixed was refused with "table region could not be located" — permanently, with no CLI recovery path, on a ledger that never drifted. A false refusal is worse than the bug this guard exists to fix. The region is now anchored on the header row `renderTable` always emits, running from its last line-start occurrence to the end of the pre-fence text. The boundary is the fence rather than a line prefix, so a multi-line row is captured whole, re-renders byte-identically, and compares equal. The header literal is hoisted to one constant both `renderTable` branches and the extractor share, so the two surfaces cannot drift apart. Deliberately unchanged: `cell()` and `validateDescription`. The cosmetic corruption a newline causes in the rendered table is pre-existing, and either escaping it or rejecting the input would change what existing ledgers render to or what input is accepted. Also closes a coverage gap the standards review raised: the non-ENOENT pre-image read branch — the one that stops an unreadable file from bypassing the guard — now has a behavioral test that injects EACCES by monkeypatching `fs.readFileSync` for that one path and restoring it in a `finally`, never by `chmod 0o000` (root ignores mode bits, so that would pass with zero coverage). The #3689 property generator no longer strips newlines out of descriptions, which is why this was invisible to it. Refs #3689 * chore(changeset): backfill PR number for #3689 fragment * chore(changeset): backfill PR number for #3689 fragment * fix(#3689): terminate the header scan when the match sits at index 0 `extractTableRegion`'s backward search for the table header could loop forever. On a rejected match at index 0 it set `searchFrom = idx - 1`, i.e. `-1`; `String.prototype.lastIndexOf` clamps its position argument into `[0, length]`, so the next iteration searched from 0, found the same match, rejected it identically, and set `-1` again. The loop made no progress. Reachable only through the exported `extractTableRegion` — `writeLedgerAtomic` reaches it after `parseFrontmatterStrict` has already succeeded, so the candidate region begins with the `---` frontmatter fence and a match at index 0 is impossible. Latent rather than live, but an exported `for(;;)` that can fail to advance is not something to ship. Confirmed by running the pre-fix compiled function on `TABLE_HEADER_LINE + 'X\n' + <a valid json fence>` as a backgrounded child: it was still alive after five seconds having printed nothing, and had to be killed. Post-fix the same input returns `null` promptly — correct, since the sole header occurrence fails the end-of-line test and no valid header exists. A regression here would stall the suite rather than fail it, so the new test also asserts the returned value rather than relying on termination alone. No wall-clock assertion is involved. Refs #3689 * test(#3034): publish the lane trace before the done-file that releases dependents `preservesSelectionOrderParallelDespiteCompletionOrder` forces a reverse completion order with a dependency chain rather than sleeps: each stub lane waits on `done-<dep>` before finishing. It then ended with touch "$RUN_DIR/done-$slug" echo "end:$slug" >> "$TRACE" Those are two unsynchronized operations in separate shell processes. A dependent's `wait_for_file` unblocks the instant the upstream's `touch` lands, but the upstream's own `echo` has not necessarily run — so if the upstream is descheduled between the two, the dependent can run its whole body and append its `end:` line first. The done-file was published before the state it signals. Observed on the remote runner as `[end:claude, end:codex, end:gemini]` where selection order demands `[end:claude, end:gemini, end:codex]`. The failure was in the fixture's own self-check, before it reached the assertion #3034 exists to make. Not a flake and not a wall-clock margin: this branch passed the full suite twice at 14f494644 and 90c5d7a03, and the only delta in the failing run was one added test in tests/broken-windows.test.cjs — an unrelated module. Adding load elsewhere in the suite was enough to invert it, which is what a real race does. Swapping the pair establishes a genuine happens-before: anything a dependent can observe is written before the file that releases it. A comment records why, so the order is not tidied back. The production path is unaffected and was independently confirmed correct — `invoke_reviewers` joins every lane with `wait`, then aggregates by iterating DISPATCH_SLUGS in selection order, reading per-slug result files. It consumes no completion-order signal at all. Refs #3034 --------- Co-authored-by: sim <sim@local>	2026-08-24 17:43:25 -04:00
Tom Boucher	a2387a0545	feat(#3034): add opt-in parallel reviewer lanes (#3822) ... * test(#3034): failing-first coverage for opt-in parallel reviewer lanes Executes the real invoke_reviewers dispatch block from review.md against a stubbed gsd_run seam rather than pattern-matching the workflow text, so the two properties that actually carry risk are observable: that every lane is joined before aggregation, and that concurrent lanes cannot tear a line in gsd-review-lane-results.jsonl. Concurrency is proven by a barrier fixture, not by elapsed time -- each stub lane blocks until all lanes have checked in, which can only complete if they overlap. Red against the current sequential dispatch, by design. Refs #3034 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * feat(#3034): add opt-in parallel reviewer lanes Reviewer lanes within one review pass inspect the same immutable plan snapshot and have no dependency on one another, but were dispatched strictly one at a time, so a multi-reviewer pass cost roughly the sum of its lanes. The serialization is a deliberate protection against provider rate limits, so it stays the default; review.parallel_lanes opts a project out of it. The loop body is hoisted into run_review_lane so the sequential and concurrent paths share one body -- two hand-synced dispatch bodies is the divergence class ADR-2782 spent a phase deleting. Each lane writes a slug-scoped result file, concatenated in selection order after the join: concurrent O_APPEND is atomic only below PIPE_BUF, and write_reviews parses that JSONL to render the models:/model_sources: frontmatter, so a torn line is a broken REVIEWS.md rather than a cosmetic log defect. Aggregating in selection order also keeps the artifact byte-identical between the two paths. The guard is strict equality on "true" and falls back to sequential when config-get fails -- the opposite polarity from the commit_docs guard, because failing open here fires the very requests the default prevents. Also corrects docs/COMMANDS.md and its four locale mirrors, which described --all as running every configured reviewer in parallel when dispatch was in fact sequential. Closes #3034 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#3034): de-duplicate dispatch slugs and scope lane locals Review finding (Standards axis): a slug repeated in SELECTED_REVIEWERS would put two concurrent background jobs on the same > -truncated per-lane result file. The shared-append form this replaced could not corrupt itself that way, so de-duplicating is what keeps the concurrent path no worse than the sequential one. Selection de-dupes today -- the roster is a Set and review.default_reviewers normalizes lowercase-unique -- but reachability analysis is not a contract, which is the same reason the roster derivation itself is guarded. Splitting once into DISPATCH_SLUGS also removes the duplicated tr-split the same review flagged: the dispatch and aggregation loops now share one list, which is what guarantees they walk the same slugs in the same order. A plain string accumulator rather than an array, because zsh and bash disagree on array indexing and this block runs under both. Also scopes run_review_lane's locals. Not a live fix -- each dispatched call already forks its own subshell -- but it makes the isolation a property of the function rather than of the dispatch mechanism happening to fork. Refs #3034 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * test(#3034): acknowledge review.md growth, drop spent 2295 ack The differential attribution gate reported review.md growing 4173 bytes (30712 -> 34885) with no live acknowledgment. Adds the per-PR fragment it asks for, naming only the one path it reported. Deleting tests/emitted-drift-acks/2295-resolved-model.json is required, not opportunistic. That fragment declared review.md and nothing else, and its ripple is already absorbed into the base, so it is spent -- it can no longer clear anything, which is why the gate still reported review.md as unacknowledged. It could not simply be left alone either: two ack sources may never name the same path, so it blocked this PR's fragment outright. CONTRIBUTING is explicit that a fragment whose last entry is removed gets deleted with it, because an empty fragment signals nothing while its presence reads as a live alarm. Refs #3034 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * chore(#3034): backfill changeset PR number Refs #3034 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Opus 5 <noreply@anthropic.com>	2026-08-24 15:25:22 -04:00