skill-tree

Find the commit that introduced a regression automatically with git bisect run.

Configure Jest for a TypeScript project — ts-jest, module mapping, and coverage thresholds.

Diagnose a slow Postgres query and add the right index using EXPLAIN ANALYZE.

Test React components with Testing Library — render, query by role, and assert on user-visible behavior.

Fix TypeScript ES module import errors by adding .js extensions to relative imports.

Migrate a Jest test suite to Vitest — config, globals, and mock API differences.

Comprehensive guide for creating high-quality skills for Claude. Use when building a new skill, writing a SKILL.md, designing skill frontmatter, planning skill structure, debugging trigger issues, or reviewing an existing skill for improvements. Covers standalone skills, MCP-enhanced skills, and skill-tree programmatic skills.

Helps write clear and conventional git commit messages.

Assists with Docker Compose configuration, multi-container setups, and debugging container issues.

Helps write and debug React component tests using React Testing Library. Use when writing unit tests for React components, debugging test failures, or setting up testing infrastructure.