Enforces a disciplined test-driven workflow to reproduce, fix, and verify code bugs while preventing regressions.
The Test-First Bug Fixing skill automates a rigorous debugging process within Claude Code by requiring the creation of a failing test case before any code modifications occur. It guides the AI to identify existing test structures, document reproduction steps, and utilize parallel subagents to attempt multiple fix strategies simultaneously. By prioritizing verification and full-suite regression testing, it ensures that bug fixes are robust, well-documented, and do not introduce new issues into the codebase, making it essential for maintaining high-quality software projects.
Key Features
0141 GitHub stars
02Automated bug reproduction via mandatory failing test creation
03Parallel fix attempts using specialized general-purpose subagents
04Intelligent discovery of existing test frameworks like pytest, Jest, and Vitest
05Standardized 'Arrange-Act-Assert' test pattern enforcement
06Full-suite regression testing to ensure long-term codebase stability
Use Cases
01Preventing regressions when addressing edge cases in production features
02Fixing reported crashes or unexpected behavior in complex legacy codebases
03Establishing minimal test infrastructure in projects that currently lack unit tests
