Python Project Architecture

Core Principles

• Type hints everywhere — Pydantic for runtime, mypy for static
• uv for everything — Package management, virtualenv, Python version
• Ruff only — Replace Flake8 + Black + isort with single tool
• src layout — All code under src/ directory
• pyproject.toml only — No setup.py, no requirements.txt
• Async all the way — Once async, stay async through call chain
• No backwards compatibility — Delete, don't deprecate. Change directly
• LiteLLM for LLM APIs — Use LiteLLM proxy for all LLM integrations

No Backwards Compatibility

Delete unused code. Change directly. No compatibility layers.