# Agent Skills > Portable AI agent skills for Claude Code, Gemini CLI, Codex, and other coding agents. Each skill is a self-contained Markdown file at `skills//SKILL.md`. Using skills with your agent: /guide/using-skills. Skill format spec: /guide/skill-format. Manual authoring workflow: /guide/create-a-skill. Validation tooling: /guide/validate-and-test. Project structure: /guide/contributors/structure. ## Table of Contents ### Contributors - [Development Workflow](https://skills.arttet.dev/guide/contributors/workflow.md) - [Commands](https://skills.arttet.dev/guide/contributors/commands.md) - [CI/CD](https://skills.arttet.dev/guide/contributors/ci-cd.md) - [Repository Structure](https://skills.arttet.dev/guide/contributors/structure.md) ### Skills - [Skills](https://skills.arttet.dev/skills.md) - [Git Commit Planner](https://skills.arttet.dev/skills/git-commit-planner.md) ### Other - [Create a Skill](https://skills.arttet.dev/guide/create-a-skill.md) - [Getting Started](https://skills.arttet.dev/guide/getting-started.md) - [Skill Format](https://skills.arttet.dev/guide/skill-format.md) - [Using Skills](https://skills.arttet.dev/guide/using-skills.md) - [Validate and Test](https://skills.arttet.dev/guide/validate-and-test.md)