Run tests + typecheck and report concisely.
- Ensure deps are present (SessionStart bootstrap runs
npm ci; else run it). - Tests:
npm test(→vitest run); single filenpx vitest run <path>. Typecheck/build:npm run build(→tsc). - Summarize: total pass/fail, and for each failure the test name + first failing assertion; report any
tsctype errors with file/line. - Do not modify source unless asked.