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9a3ef3cda7
Schema-migration matrix + fuzz harness + RSS budget gate + read-latency
under sync + sync lock regression + tests/heavy convention + nightly CI
workflow + BFS frontier cap on traverseGraph.
CI infra (T1-T7):
- tests/heavy/ directory convention + scripts/run-heavy.sh + bun run test:heavy
- tests/heavy/pg_upgrade_matrix.sh: walk pre-v0.13 + pre-v0.18 brain shapes
forward to head via bootstrap → SCHEMA_SQL → migrations → verifySchema
- test/fuzz/{pure,mixed,filesystem}-validators.test.ts: 1000-run fast-check
property tests across 8 trust-boundary validators
- scripts/check-fuzz-purity.sh: bun-bundle + grep guard, wired into verify
- tests/heavy/measure_rss.sh: in-memory PGLite workload + peak RSS measurement
via /proc/self/status (Linux) or process.memoryUsage().rss fallback (macOS,
refuses to write baseline)
- tests/heavy/read_latency_under_sync.sh: phase A baseline + phase B under
parallel writer load, reports p50/p95/p99 + delta_pct
- tests/heavy/sync_lock_regression.sh: N concurrent gbrain sync against one
DB, asserts 1 winner + N-1 lock-busy + zero leaked gbrain_cycle_locks rows
- .github/workflows/heavy-tests.yml: cron '17 8 * * *' + heavy-tests label
trigger + Postgres service + artifact upload on failure
Engine (T8):
- BrainEngine.traverseGraph opts gain frontierCap?: number + onTruncation?:
(info: TruncationInfo) => void callback. Return shape preserved
(Promise<GraphNode[]>) for MCP wire stability.
- Postgres CTE: parenthesized LIMIT N ORDER BY (slug, id) inside recursive term.
- PGLite: same SQL with positional params.
- Per-call callback closure — not engine-instance state — so concurrent
traversals on the same engine don't cross-talk. 5 contracts pinned in
test/regressions/v0_36_frontier_cap.test.ts.
Three plan-review passes ran before any code: CEO scope review (Approach C),
Eng dual-voice review (Claude subagent + Codex), and Codex 2nd-pass against
the revised plan. The 2nd pass caught issues the first two missed (Bun ESM
vs require.cache; engine-instance metadata stomping under concurrency;
fixture-size inconsistency). All addressed.
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>