Test Quality Analysis

This analyzes your test suite for common problems like overmocking, flaky tests, and weak assertions. It checks whether you're testing behavior instead of implementation details, flags tests with too many mocks (more than 3-4 is a smell), and helps you spot fragile selectors or race conditions. Works with Vitest, pytest, and Playwright. The coverage analysis goes beyond just percentage to look at whether critical paths and error cases are actually tested. Use it during code review or when tests keep breaking for no clear reason. The FIRST principles checklist and anti-pattern examples are genuinely helpful for spotting tests that look fine but won't catch real bugs.