In this repository

• Layers: Handlers = backend/app/api/v1/endpoints/, business logic = backend/app/services/, data access = backend/app/repositories/. Dependency injection in FastAPI is via Depends(); constructor injection still applies for services that receive repositories. See .cursor/rules/project.md.
• CQRS: This project separates commands (writes) and queries (reads): command services + write repositories for create/update/delete; query services + read repositories for list/get. When designing or refactoring features, use the CQRS split. See .cursor/rules/cqrs.md and .cursor/skills/cqrs-pattern/SKILL.md.
• After edits run make format and make lint from repo root. Full context: .cursor/skills/README.md and .cursor/rules/.

Python Design Patterns

Write maintainable Python code using fundamental design principles. These patterns help you build systems that are easy to understand, test, and modify.

When to Use This Skill