Summary

• DashboardReporter batching: buffer test rows in memory and flush in batches of 50 inside a transaction. Was one `fsync` per test (one transaction per insert) — fine at 100 tests, painful at 5000. WAL mode helps with parallelism but doesn't help with sync latency. Final flush in `onEnd()`.
• storageState pattern: new `tests/auth/auth.setup.ts` logs in once with form auth and saves session to `.auth/form-auth.json`. Wired up to the `chromium-auth` project from PR ci: multi-browser sharded CI with PR gating + artifact upload #1 but currently inert (no test tagged `@auth` yet) — present as the reference pattern. Avoids re-running login in every authenticated test once the suite grows.
• Pre-commit `tsc --noEmit`: type errors no longer slip through to CI. Lint-staged still runs first.

Test plan

• Run a local test pass and confirm the DB still gets all rows (`sqlite3 dashboard/data/results.db 'select count(*) from tests'`)
• Trigger a deliberate type error and confirm pre-commit blocks it
• On a future authenticated test, tag it `@auth` and run `npx playwright test --project=chromium-auth` to verify storageState reuse

🤖 Generated with Claude Code