3. /test — Test Generation
What it does: Generates comprehensive tests for the code you specify — unit tests, integration tests, and edge case coverage.
Why you need it: Writing tests is the task developers skip most. This skill generates tests that cover happy paths, edge cases, and error scenarios in seconds.
4. /refactor — Safe Refactoring
What it does: Refactors code while preserving behavior. Runs existing tests to verify nothing breaks.
Why you need it: Refactoring is risky without comprehensive tests. This skill refactors incrementally and verifies at each step.
5. /debug — Interactive Debugging
What it does: Takes an error message and systematically traces the root cause through your codebase.
Why you need it: Instead of manually tracing stack traces, the skill follows the error path, identifies the root cause, and suggests fixes with confidence levels.
6. /doc — Documentation Generator
What it does: Generates JSDoc/TSDoc comments, README sections, and API documentation from your code.
Why you need it: Documentation that stays in sync with code. Run after any significant change to update docs automatically.
7. /migrate — Database Migration Helper
What it does: Generates database migration files based on schema changes, with rollback support.
Why you need it: Migration files need to handle both up and down migrations, data preservation, and edge cases. This skill handles all of it.
What it does: Analyzes code for performance issues — N+1 queries, unnecessary re-renders, memory leaks, and inefficient algorithms.
Why you need it: Performance issues are easy to introduce and hard to find. This skill scans your code and flags potential bottlenecks before they hit production.
9. /security — Security Audit
What it does: Scans code for security vulnerabilities — injection risks, authentication bypasses, data exposure, and dependency vulnerabilities.
Why you need it: Security reviews are expensive and often skipped. This skill provides a baseline security audit in minutes.
10. /scaffold — Project Scaffolding
What it does: Generates boilerplate for new features, components, API endpoints, and pages following your project’s existing patterns.
Why you need it: Consistency across your codebase. Every new component follows the same patterns as existing ones.
How to Install Claude Code Skills
# Skills are defined in CLAUDE.md or .claude/skills/
# Add a skill by creating a skill file:
# .claude/skills/commit.md
# ---
# name: commit
# trigger: /commit
# ---
# [skill instructions here]
Most skills from the community can be found on GitHub. Clone the skill file into your .claude/skills/ directory and restart Claude Code.
People Also Ask
Are Claude Code skills free?
Yes — skills themselves are free configuration files. They use your existing Claude Code API credits for execution.
Can I create custom skills?
Absolutely — and you should. Any repetitive workflow can become a skill. Write the instructions in markdown, define the trigger, and you’re done.
Do skills work with any model?
Skills work with any model Claude Code supports. Some skills work better with Opus (complex reasoning) while others are fine with Sonnet (speed).
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