Routes and Controllers
Where FastAPI registers endpoints, how transport handlers map request data, and where errors become API responses.
Code-annotated documentation for the implemented FastAPI modular monolith.
These pages annotate the backend code that exists under backend/app. They do not restate requirements or prescribe future implementation work; those concerns live in the spec docs.
Implementation pages use short code snippets with captions like backend/app/main.py:9 so you can jump directly to the source. Links to requirements, design docs, and ADRs point outward instead of duplicating their content.