bugfix-and-debug

Debug failing tests by collecting stack traces and error output, forming hypotheses about root causes, then applying minimal fixes and re-running tests to verify. This skill enforces evidence-based debugging across PHP and TypeScript codebases using Pest and Vitest test runners.

Diagnose PHP exceptions and 500 errors by reproducing the failure, examining stack traces, identifying the root cause with minimal changes, and validating the fix with regression tests. The workflow prevents incomplete patches and recurring bugs.

Reproduce TypeErrors and unexpected React behavior through test cases, collect evidence from error messages, form ranked hypotheses, verify with targeted tests, then apply the smallest code change needed to resolve the root cause.

Yes. This skill enforces a mandatory validation loop: collect evidence, verify hypotheses with tests, apply minimal root-cause fixes, and run regression tests to confirm no new failures occur across PHP and TypeScript components.

You can target specific failing tests initially to diagnose the issue, then run broader test suites to validate the fix. The prescribed debugging workflow supports both focused diagnosis and full regression prevention.