Skill UI

Design and verify runtime progress output for Python, PowerShell, and Node.js batch scripts. Covers start, progress, per-item failures, summaries, stdout separation, and exit-status consistency.

This skill audits Python pytest suites for quality and reliability. It checks for surviving mutants, untested code, flaky tests, and slow tests. It identifies removal candidates and reports findings without modifying code. Use it to review test effectiveness and optimize suite performance.

This skill verifies Python code changes by running mutation testing on modified lines. It generates tests to catch mutants and reports evidence of coverage rather than diffs. It ensures changes are properly tested before completion, using pytest and mutation analysis to validate correctness and prevent unnoticed regressions in software development workflows.