create-agents-md — Claude Code skill: what it does, how to install

---
name: create-agents-md
description: Create AGENTS.md files for project-specific inline rules. Use when adding small, project-specific instructions that should be committed in repos.
---

# Create AGENTS.md

Guide for creating AGENTS.md files for project-specific inline rules.

## When to Use AGENTS.md

- **Small, project-specific instructions** that should be committed in the repo
- **Folder-scoped rules** for specific directories
- **Package-specific instructions** in monorepos
- **Test-specific guidance** in test directories

## When NOT to Use AGENTS.md

- Reusable knowledge across projects → Use skills
- Large documentation → Use skills with references
- Complex workflows → Use skills with scripts

## AGENTS.md Structure

AGENTS.md is a simple markdown file without metadata:

```markdown
# Project Instructions

## Code Style

- Use TypeScript for all new files
- Prefer functional components in React
- Use snake_case for database columns

## Architecture

- Follow the repository pattern
- Keep business logic in service layers
```

## Location

- **Project root**: `AGENTS.md` – Primary, inline instructions and references for the whole project (commands, tech stack, testing, code style, architecture, safety boundaries).
- **Subdirectories**: `subdirectory/AGENTS.md` – Folder- or package-scoped instructions when local behavior meaningfully diverges from the root (e.g., a specific package, service, or test tree).
- **Nested support**: Agents typically combine instructions from the closest `AGENTS.md` with parent ones; keep root general and use nested `AGENTS.md` only where you truly need more specific rules.

## Best Practices

- Keep AGENTS.md files small and focused
- Use for project-specific conventions
- Prefer **short, concrete references** over long prose:
  - Link to project docs, specs, and runbooks
  - Point to example files or directories (e.g., `see src/api/users.ts for canonical pattern`)
  - Include the most important commands with exact CLI invocations
- Reference existing code examples when possible
- Update as project evolves

## References

For detailed best practices, see `references/best-practices.md`.