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The E2E suite was flaky. ~3 of every 5 runs had 4-10 failures clustered in Links, Timeline, Versions, Minions resilience, Parallel Import, and Page CRUD tests. Symptoms included "expected 16 pages, got 8" (half), "expected 1 link inserted, got 0", timeline entries missing after round-trip, and similar data-shape mismatches. Root cause: bun test runs test FILES in parallel (each in a worker process). 13 E2E files share one DATABASE_URL, and `setupDB()` in `test/e2e/helpers.ts` does `TRUNCATE ... CASCADE` on all tables before each file's `importFixtures()`. File A's TRUNCATE would race with file B's in-flight INSERT stream, producing the observed half-populated or wrong-count states. An earlier attempt used a Postgres advisory lock held on a dedicated single-connection client for the lifetime of each file's run. It broke because bun's default 5000 ms hook timeout fires on queued beforeAll() calls: with 13 files serializing through the lock, files 2-13 would time out waiting for file 1 to finish. This commit switches to sequential file execution at the harness level via scripts/run-e2e.sh, which loops through test/e2e/*.test.ts one at a time, tracks aggregate pass/fail counts, and exits non-zero on the first failing file. No lock, no timeout issues, no changes to any test file. package.json test:e2e points at the new script. Verified: 5 back-to-back runs against the same Postgres container, each completing in ~5 min. Every run: 13 files, 138 tests, 0 fails. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>