Ln 113 Backend Docs Creator

This is an L3 worker that generates backend API and database schema docs when the coordinator detects Express, FastAPI, Prisma, or similar tooling in your project. It writes api_spec.md with OpenAPI 3.0 compliant endpoint tables and database_schema.md with Mermaid ER diagrams. The skill is strict about not leaving template markers or TBD placeholders in output, and it won't duplicate files if they already exist. You don't call it directly. The ln-110 coordinator invokes it conditionally based on flags, hands it a context store with parsed routes and schemas, and this worker fills the templates. It's opinionated about tables over prose and enforces a no code examples rule so your API spec stays focused on contracts, not implementations.