Spins up the dev server (if configured in playwright.config), runs Playwright tests, and returns structured pass/fail results per test with error messages.

Executes a SQL query as a specific Postgres role with JWT claims set, so you can verify RLS policies. Runs inside a ROLLBACK transaction — never mutates data.

Runs tsc --noEmit and returns structured errors with file, line, column, error code, and message.

Runs any npm script (test, lint, etc.) and parses Vitest/Jest output into structured pass/fail results per file. Falls back to raw output for non-test scripts.

Runs next build and returns structured errors (TypeScript, module, page-level) plus a list of generated pages with their render types and sizes.