Reusable SKILL.md capabilities that give your agent new expertise — installed into .claude/skills/ and friends.
.claude/skills/
Testing strategies including contract testing, snapshot testing, mutation testing, property-based testing, and test organization
Create a new Claude Code skill with tests
Comprehensive testing standards including unit, integration, security, and property-based testing with TDD methodology
Use when running tests, analyzing coverage, writing test cases, or hunting for bugs. Provides testing strategies and bug report formats.
Use to choose and apply TDD or BDD based on the change, enforcing fast Red-Green-Refactor and Given-When-Then loops.