Files
gbrain/scripts
Garry Tan 45c4004892 ci(test): quarantine *.serial.test.ts files from test-shard
CI's test-shard.sh was including *.serial.test.ts files in the parallel
shard runs, which broke voyage-multimodal.test.ts: 18 of its 22 tests
failed in CI shard 2 because eval-takes-quality-runner.serial.test.ts
ran before it in the same bun-test process and leaked its mock.module()
substitution of src/core/ai/gateway.ts. The leaked mock omitted
embedMultimodal and resetGateway, so voyage-multimodal saw `undefined
is not a function` everywhere it touched the gateway.

Locally `bun run test` (run-unit-parallel.sh → run-unit-shard.sh)
already excludes *.serial.test.ts and runs them via `bun run test:serial`
in their own pass with --max-concurrency=1. Master ran green there;
only CI's matrix shards exposed the leak. The runner.serial test file's
own header comment explicitly calls out this exact cross-file mock
leak — the quarantine was the design, CI just wasn't honoring it.

Three changes:

1. scripts/test-shard.sh — exclude *.serial.test.ts and *.slow.test.ts
   from the find expression, mirroring scripts/run-unit-shard.sh.

2. .github/workflows/test.yml — add a `test-serial` sibling job that
   runs `bun run test:serial`. Keeps serial tests gating CI without
   merging them back into the parallel shards.

3. test/scripts/test-shard.test.ts — regression test pinning the three
   exclusion clauses (serial, slow, e2e) so a future refactor that
   drops one of them fails loud rather than silently re-introducing
   the cross-file mock leak.

Verified locally:
- shard 2 reproduction: 18 voyage-multimodal failures → 0 (1 unrelated
  env-dependent perf flake remains, won't fail on CI)
- bun run test:serial: 189/190 pass (1 unrelated env-dependent
  BrainRegistry flake from ~/.gbrain/config.json presence)
- typecheck + check:test-isolation clean
2026-05-10 07:18:10 -07:00
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