2 Commits

Author	SHA1	Message	Date
Tom Boucher	69e7afd0c7	chore(#3212): bounded quantifiers over document content — prohibition with teeth — Phase 4 (#3441) ... * feat(#3415): ship local/no-unbounded-quantifier, burn down ReDoS class Phase 4 of epic #3212 (ADR-3212 §5/§7, the final phase). New rule flags an unbounded */+/{n,} quantifier over a broad character class ([\s\S], dotAll ., or a 1-2-unit negated class like [^\n]/[^)\n] — the exact #2128-fixed shape) applied to a regex whose match target is data-flow-traced to readFileSync content. eslint-rules/lib/readfilesync-trace.cjs extracts the data-flow tracer shared with no-crlf-fragile-split (Phase 2) rather than a second copy — no-crlf-fragile-split refactored onto it with zero behavior change, parity-tested. Real triage, not 798 mechanical edits: the ADR's census (2026-08-08) screened every unbounded quantifier in the tree unscoped. Correctly scoped to readFileSync-derived content (matching Phase 2's own G2/G3 scoping), the rule found 162 real hits across two detection waves — the second wave (93) surfaced only after a genuine off-by-one bug in this rule's own first draft was caught while writing its RuleTester tests and fixed (the bug silently missed every directly-quantified [\s\S]* with no gap before the quantifier — exactly the class this rule exists to catch). 3 hits landed in production src/ (commands.cts, milestone.cts, roadmap.cts) and were each empirically timed against adversarial input (matching #2128's own measured-not-assumed precedent) — all confirmed linear-time/benign, left unbounded with a measured-evidence comment rather than mechanically bounded. The remaining 159 are test-file fixture parsing (test-author-controlled, fixed-size content, not adversarial input) — each suppressed with a specific, non-generic reason. Zero functional behavior changed anywhere in this diff. tests/no-pending-3212-markers.test.cjs locks the epic's own closing invariant (ADR §7: "assert zero pending #3212 markers remain") — ground truth confirmed trivially true today (no phase left any such marker behind), now regression-locked going forward. Design: .gsd/phase/chore-3415-prohibition-with-teeth/40-design.md Test matrix: .gsd/phase/chore-3415-prohibition-with-teeth/50-test-matrix.md Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3415): correct rule category mislabel, add CI test-scope entry An orthogonal Standards-axis review found eslint-rules/no-unbounded-quantifier.cjs mistakenly carried meta.docs.category: 'Portability', copied from a sibling rule without realizing what that implied: docs/contributing/cross-platform- portability-rules.md governs an ADR-1703 rule family under a hard "zero escape hatches" contract (tests/portability-rule-disable-ban.test.cjs's PROTECTED_RULES bans eslint-disable for those rules entirely). This rule is not part of that family — it's ADR-3212 (ReDoS/CWE-1333), a different epic — and its eslint-disable-next-line suppressions (159 of them, added earlier this same phase after empirical benign-verification) are an intentional, correct design, not a bypass. Corrected to category: 'Best Practices', matching the actual precedent (no-adhoc-regex-escape.cjs, Phase 1 of the same epic, which is also correctly outside PROTECTED_RULES), and the rule's own docstring now states this explicitly so a future reader doesn't have to re-derive it. Also registers a new scripts/ci-test-scope.cjs bucket so editing this rule or the shared eslint-rules/lib/readfilesync-trace.cjs helper re-runs their own test suites under targeted CI selection — was previously unregistered and invisible to that fast-path (this PR's own gsd-test checkpoint runs the full suite regardless, so this only affects future narrowly-scoped PRs). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3415): bound no-unbounded-quantifier's own scanner (CWE-1333, ironic) Security review found the rule meant to catch algorithmic-complexity bugs had one of its own: hasUnboundedBroadQuantifier's negated-class inner scan walked from each `[^` occurrence to the next `]` (or EOF) with no bound, while the outer loop only ever advanced by one character — O(n²) total work on a pattern with many unclosed `[^` runs. Runs unconditionally inside checkPattern on any `new RegExp('literal string')` argument in any linted file, before the (cheap) readFileSync data-flow gate — so a single crafted string literal, no valid regex syntax required, could make `npm run lint` / CI hang. Empirically confirmed both the bug and the fix: pre-fix, n=4000/8000/ 16000/32000 chars took 30.8/115.6/463.8/1874.3ms (~4x work per 2x n, quadratic); extrapolated, the 300000-char repro from the finding would run ~165s. Post-fix (bail the inner scan once units exceeds the rule's own 1-2-unit scope, rather than continuing to hunt for a closing `]`), the same 300000-char input runs in 8.7ms via the real rule module, independently reconfirmed at 18ms via a fresh Linter.verify() call. New regression row in tests/no-unbounded-quantifier.rule.test.cjs asserts the RuleTester run on a 50000-char adversarial pattern completes and returns a defined result — no wall-clock assertion (CLAUDE.md Clock Seams / local/no-elapsed-assertion). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3415): triage 3 new sites, re-raise ceiling after upstream batch next merged 12 more PRs during this PR's review. Two consequences: - tests/edit-phase.test.cjs (fix #3262, unrelated) added 3 new content.match(/<tag>([\s\S]*?)<\/tag>/) reads of this repo's own workflow .md content — the same Class A pattern as the ~159 sites already triaged elsewhere in this PR. Suppressed with the same established reason. - lint-allow-test-rule-refs' ratchet ceiling needed re-raising again (301 -> 303) for the same reason as the two prior bumps: organic growth from unrelated, already-reviewed PRs landing concurrently, not a defect in this branch's own diff. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>	2026-08-14 10:02:28 -04:00
Tom Boucher	05b170e448	chore(#2928): productionize the CONTEXT.md predicate fact-store and gate it in CI (#2938) ... * feat(#2928): port CONTEXT.md predicate fact-store into the src seam Productionizes the ADR-1671 Option-E reference example as a real module: src/context-predicates.cts (parser + selector + index builder) compiled to gsd-core/bin/lib/, plus scripts/gen-context-index.cjs following the repo's --check/--write drift-guard idiom and wired into lint:generated-sync. Parser behavior is deliberately prototype-equivalent in this commit so the next commit's regression matrix binds to the real defects rather than to a missing module. Two locked design deviations from the prototype: - duplicates carry a count, not line numbers - the committed index carries no line field at all, resolving ADR-1671 open question 4: an artifact without line numbers cannot drift on a line shift, so promoting --check to a CI gate does not make it routinely red Also reconciles the one remaining duplicate predicate ID (RULESET.WORKFLOW_MARKDOWN.FENCES was declared twice; the non-MD040 wording is removed) so the gate can land fail-closed on duplicates. Refs #1671 * test(#2928): failing-first matrix for the predicate fact-store Adds the regression matrix from the phase test plan: parser declaration forms, fence and comment regions, ID/value grammar boundaries at limit-1/limit/limit+1, CRLF fidelity, duplicate detection, the drift-guard CLI, the selector query surface, and four document-shaped fast-check properties. Seven rows are RED for behavioral reasons against the ported parser: indented-bare, star-list, plus-list and numbered-list declaration forms are dropped; a tilde fence and a four-backtick fence containing a shorter fence are not skipped; and a multi-line HTML comment is parsed as live. Eleven selector rows are RED because the query surface is not wired yet. Negative fixtures come from real repo documents that predate the grammar (CONTEXT.md, CONTRIBUTING.md's fenced env-assignment examples) per the fixture-provenance rule, and the property generators are document-shaped rather than seeded from our own serializer. Refs #1671 * fix(#2928): consume the shared fence scanner, relocate the index, wire the selector Drives the failing-first matrix green. Parser: replaces the ported naive triple-backtick toggle with the shared markdown-sectionizer fence engine. scanFencedBlocks and FencedBlockRecord gain an export keyword — the only change to that module, which has 71 upstream dependents — because it already returns line-indexed spans, which is exactly what a line-reporting parser needs. It also already documents itself as the second copy of the fence state machine pending consolidation; adding a third copy here would have been the generative-fix divergence this repo warns about. A parity suite now pins predicate fence-skipping against that scanner across eight fence shapes. HTML-comment skipping stays local because the sectionizer has no comment scanner. Declaration forms widen to indented-bare, star, plus and numbered list items. Index location: docs/CONTEXT-INDEX.json, not a module under bin/lib. The remote matrix run caught the original choice — a committed .cjs there ships ~120KB of CONTEXT.md prose into a runtime module, and two content guards fired truthfully on it (a leaked .claude install path, and four hardcoded package-name literals). Neither guard was allowlisted; the artifact moved instead, mirroring docs/INVENTORY-MANIFEST.json. Nothing at runtime needs to require it — it is a drift-detection artifact, so the selector parses CONTEXT.md live and is always current. Generator: adds a frozen REASON enum and --check --json so the gate's outcome is asserted structurally instead of by matching prose, and --context-path/--index-path so tests drive the real CLI against a temp tree with no filesystem monkeypatching. Selector: gsd_run query context-predicates with --class/--prefix/--contains, structured output carrying a matched count, own-property guards, and no project-root resolution. Registering it exposed that the query dispatch table and the usage string had drifted: a new parity test found 20 routed commands missing from the usage list, all added here rather than deferred. Refs #1671 * test(#2928): lock the newly-public scanFencedBlocks contract Exporting scanFencedBlocks made it public API for the first time, so it needs its own contract test independent of the consumer that motivated the export. Memtrace's co-change analysis flagged the gap: this suite changes together with markdown-sectionizer.cts 8 times in 90 days and was absent from the diff. Covers the documented rules: 0-based indices, -1 for an unterminated fence, the same-char/>=length/no-trailing-text closer rule, a shorter fence inside a longer one staying content, CommonMark 4.5 backtick-in-info-string, and <=3-space indent tolerance. Refs #1671 * fix(#2928): address both isolated review passes Two independent reviewers (correctness axis and security axis, neither the author) found seven findings. All are fixed here with regression tests; none deferred. BLOCKER — comment-blind fence scanning caused silent, permanent predicate loss. The HTML-comment scan and the fence scan ran as two independent passes, and the fence scanner is comment-blind, so a fence delimiter inside an HTML comment with no later close read as an unterminated fence and skipped every remaining line to EOF. Worse, the drift-guard could not catch it: it diffs against a baseline produced by the same corrupted parse. The two constructs now interleave in a single pass so each suppresses the other's boundary detection while active, covered in both directions. The parity suite still binds this scanner to markdown-sectionizer's for comment-free documents, so the two cannot diverge unnoticed. BLOCKER — the selector was not consumed anywhere, leaving the phase's acceptance criterion unmet. Now wired into the pre-work predicate-citation step in contributor-standards, which is the repo's actual brief-assembly path; no code-level brief assembler exists to wire into. MAJOR — ReDoS with an unauthenticated CI-hang exploit. The predicate-id regex nested a dot-containing character class inside a dot-prefixed repeat, so N consecutive dots had exponentially many partitions: 40 dots took 565ms and growth was exponential. CI runs this parser over a pull request's own CONTEXT.md, so any contributor could have hung a shared runner with one line. Replaced with linear per-segment validation. Doubled-dot ids are now rejected; the real document contains none. MAJOR — the duplicate-id gate had only ever been proven on synthetic fixtures. A test now re-inserts the exact line this branch removed and asserts the real generator names it. MAJOR — --check together with --write silently let write win, turning the gate into a writer; a missing path value resolved to the cwd and leaked an EISDIR stack trace. Both are now clean usage errors. MINOR — the hoisted skip-list was exported as a live mutable Set; replaced with a read-only predicate. MINOR — flag-shaped selector values were unmatchable; the inline --flag=value form now provides the escape hatch. Refs #1671 * chore(#2928): backfill changeset PR number 2938 --------- Co-authored-by: sim <sim@local>	2026-07-31 13:17:01 -04:00