Browser automation for testing and verification. Use after building or modifying web UI to verify changes work. Uses Playwright's accessibility tree, not pixel-based input. LLM-friendly: no vision models needed, operates purely on structured data. Deterministic tool application avoids ambiguity common with screenshot-based approaches.
Triggers: testing localhost, verifying UI changes, checking if a feature works, taking screenshots, debugging console errors, testing form submission, end-to-end verification, "does it work", "let me check the browser", "test the app", browser automation, web testing.