Step-by-step SKILL.md packages an AI follows for a single kind of task.
A skill is a focused playbook - instructions, examples and constraints - that makes any model reliable at one job, from SQL reporting to changelog writing. The router fills a plan's skill slot with the best match for the request.
Use when writing or editing Python backend code (FastAPI routers, SQLModel models, services, CLI). Covers typing, ORM usage, and English-only code style.
