Individual skill

python-type-system

Guides advanced Python type system usage: generic types with TypeVar, Protocol for structural subtyping, ParamSpec for decorator typing, TypeVarTuple for variadic generics, runtime vs static type checking tradeoffs, and py.typed marker for library distribution. Use when the user asks about Python generics, TypeVar, Protocol, ParamSpec, overload decorators, type narrowing, or distributing typed Python libraries. Do NOT use when the user asks about basic type annotations (use `python-idioms`), data validation (use `python-data-modeling`), or project setup (use `python-project-setup`).

src/process/resources/skills-library/bodies/skills/software-engineering/python-type-system/SKILL.md

Source commit 4c030c7b01c241df7b6e3535635a970f10d781af

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Last checked

Nov 4, 2026

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