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Trevin Chow
717884222b
The CI `Run tests` step is the whole job: it took 193-237s (median ~224s) across the last seven successful runs, while every other step in the job totals ~12s. Almost none of that is CPU. The suite is ~98 files that spend their time blocked on subprocesses -- `python3` script invocations, `bash` sandbox scripts, `git` fixture repos, and `bun run src/index.ts` CLI spawns -- plus deliberate real sleeps in the peer-job-runner and cross-model route tests. Bun ran all of it in one process, so the runner's other cores sat idle. Bun 1.3 can distribute test files across worker processes, so put `--parallel` on the package `test` script and have CI invoke `bun run test`. Keeping the flag in the script rather than the workflow means the command CI runs and the command a contributor runs cannot drift apart. `--parallel` implies `--isolate`, which promotes cross-file isolation from incidental to load-bearing: a test file may no longer rely on another file's leftovers. Documented in AGENTS.md, along with the one deliberate exception (ce-code-review-cross-model-routes stages a repo-root marker to exercise dirty-tree handling, and cleans it up in afterAll). Claude-Session: https://claude.ai/code/session_01EW4bpYuKU2KpVy3qqEZX9r