McRitchie Studio

Acceptance Criteria

• bin/e2e-parallel /up probe timeout is raised (90s->180s) and configurable via env
• bin/e2e-parallel preflights stray listeners on each target port before booting (reports; kills with E2E_KILL_STRAY=1)
• per-stack seeding is serialized by default to avoid concurrent RPC contention (parallel opt-in via env)
• core specs (auth, account update, navigation) carry an @smoke tag; fast lane runs via --grep @smoke
• npm script(s) for the smoke lane added and grep usage documented
• smoke lane passes locally and bin/e2e-parallel boots cleanly

Expected Test Plan

• [unit] npx playwright test --grep @smoke (fast general lane, green)
• [integration] bin/e2e-parallel multi-stack boot + sharded @smoke run (servers+DB+ports I/O boundary)

Checks Run

• [unit] npx playwright test --grep @smoke (single server) -> 15 passed (20.3s)
• [integration] E2E_BASE_PORT=3150 bin/e2e-parallel 2 -- --grep @smoke -> preflight + serialized seed + 180s /up budget; all 2 shards passed (9+6)
• [integration] bin/e2e-parallel port preflight refused to boot on busy 3101/3102 (no foreign-stack kill); bash -n clean on bash 3.2.57