Claude Rules

Claude Rules allows you to organize instructions into multiple files for larger projects.

your-project/
├── .claude/
│   ├── CLAUDE.md        # Main project instructions
│   └── rules/
│       ├── code-style.md   # Code style guidelines
│       ├── testing.md      # Testing conventions
│       └── security.md     # Security requirements

Each file should cover one topic, with a descriptive filename.
Rules without paths frontmatter are loaded at launch with the same priority as .claude/CLAUDE.md.
Rules can be scoped to specific files using YAML frontmatter with the paths field.
You can use symlinks to share rules across projects.

Example scoped rule file:

---
paths:
  - "src/api/**/*.ts"
---

# API Development Rules

- All API endpoints must include input validation
- Use the standard error response format
- Include OpenAPI documentation comments