modern-python-substratelisted

## /modern-python-substrate Modern Python toolchain substrate built by reading every comparable skill and incorporating the strongest piece from each into one opinionated reference. Targets Python 3.11+ on Linux/macOS, with Windows parity called out where it matters. ## Source comparison (everything-comparison build) | Source | What got incorporated | What was left out | |---|---|---| | [trailofbits/skills/modern-python](https://github.com/trailofbits/skills/tree/main/skills/modern-python) (CC-BY-SA-4.0) | The uv + ruff + ty + pytest core stack; src/ layout default; pre-commit pattern | Security-firm framing (security defaults belong in a separate skill); patterns reimplemented clean per CC-BY-SA-4.0 license-hygiene | | [Astral docs](https://docs.astral.sh/) (uv, ruff, ty official guidance) | Authoritative invocation patterns; correct config field names; latest behavior in 2026 | Docs are reference; the substrate teaches the workflow not the API | | [pytest official docs](https://docs.pytest.org/) | Fixtures, parametrize, marker patterns, conftest hierarchy | Plugin ecosystem catalogue (out of scope) | | Anthropic SDK + tiktoken patterns (covered in detail by `claude-api` skill) | LLM-stack integration: prompt caching, streaming, retries, token counting (mentioned + linked here, full content stays in `claude-api`) | The full SDK docs (read `claude-api` skill for that) | | [trailofbits/skills/property-based-testing](https://github.com/trailofbits/skills/tree/main/skills/pro