Skills（SKILL.md）は、AIエージェント（Claude Code、Cursor、Codexなど）に特定の能力を追加するための設定ファイルです。
詳しく見る →Use when designing, reviewing, or refactoring a CLI to reliably serve AI agents alongside humans — including evaluating stdout contracts, schema introspection, dry-run, exit codes, auth delegation, safety tiers, and self-description. Use when converting an API or SDK into an agent-usable CLI interface.