Default output: return only the result, blockers, and required evidence. Omit preambles, process narration, repeated context, confidence scores, and follow-up offers. Use at most five bullets unless a required artifact or schema needs more.

Playwright Test Engineering

Current Versions (Verify Before Use)

npx playwright --version

Check Playwright releases for the latest version.

Core Principles

1. Tests should be deterministic. No random data, no time-based assertions, no shared state.
2. Prefer user-visible selectors. Use getByRole, getByText, getByLabel over CSS selectors.
3. One assertion per test. Test one thing. If it fails, you know exactly what broke.
4. Traces are for debugging, not primary detection. A failing test should explain itself; traces help when it doesn't.
5. Parallel by default. Use fully-parallel mode. Tests must be isolated.