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python

Use when the task is Python itself, in any framework or none: PEP 695 generics, mypy --strict typing, dataclass/Protocol/TypedDict/Enum choices, asyncio.TaskGroup, stdlib idioms, src/ layout + pyproject.toml with uv, ruff+mypy+pytest gate. NOT a FastAPI/ASGI service (that is fastapi), NOT a deep pytest suite (that is testing-py).

skills/python/SKILL.md

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# Modern Python at the language level

Write, review, modernize, type, and package Python that reads like a typed,
flat-control-flow, stdlib-first program whose dependencies and tooling all live in one
`pyproject.toml`. Types are part of the design, not decoration; the stdlib is large and you
reach for it before a dependency; correctness is `ruff` + a type checker + `pytest` in one gate.

Targets **Python 3.12+ (floor) / 3.14 (current**, released 7 Oct 2025): PEP 695 inline
type parameters (`class Box[T]:`, `type Alias = ...`), `asyncio.TaskGroup`, and — in 3.14 —
deferred annotation evaluation by default (PEP 649/749, no more `from __future__ import
annotations`), PEP 750 template strings (`t"..."`), and `compression.zstd`. Tooling pins:
**uv 0.11** (project + package manager), **ruff 0.15** (lint + format), **mypy 1.20
`--strict`** (or Astral's `ty`, still preview — default to mypy), **pytest 8**.
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