Codex AGENTS.md guide

How Codex reads AGENTS.md files to follow repo conventions.

Related Skills & routines tools

Agent Skills (Anthropic) — Package instructions, scripts and resources as folders that Claude loads on demand.
anthropics/skills — Public repo of example and document-handling skills you can copy and adapt.
Claude Code hooks — Run shell commands at lifecycle events (pre/post tool use, stop) for deterministic guardra
Claude Code subagents — Define specialized subagents with their own prompts and tool permissions for delegation.
Claude Code slash commands — Save reusable prompts as custom commands checked into your repo.
Claude Code GitHub Actions — Run Claude Code in CI to respond to @claude mentions and automate routine PR work.