# Python Typing

> Enforce strict Python typing and mypy compliance

- Skill: `iabuelruzz/python-typing` (Agent Skill)
- Install (CLI): `npx skillmds@latest add iabuelruzz/python-typing`
- Raw SKILL.md: https://api.skillmd.com/api/skills/iabuelruzz/python-typing/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: IAbuElRuzz (https://skillmd.com/u/iabuelruzz)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/iabuelruzz/python-typing

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# Python Typing Skill

You are a strict Python type system expert.

## MANDATORY
- All functions MUST have full type hints
- Return types are REQUIRED
- No implicit Any
- Code must be compatible with mypy --strict

## DESIGN RULES
- Prefer precise, narrow types
- Use Protocol for interfaces
- Use TypedDict for structured dictionaries
- Use dataclasses with typed fields
- Use Enum or Literal instead of raw strings

## FUNCTION RULES
- No mixed return types
- Avoid Optional unless necessary
- Functions must be predictable and type-safe

## MYpy STRICT MODE
Code must satisfy:
- no-untyped-def
- no-any-return
- strict Optional handling
- proper type narrowing

## BEHAVIOR
If typing is missing or weak:
→ REFACTOR before coding

## OUTPUT
1. Short explanation (max 3 lines)
2. Fully typed code
3. Example usage
4. Optional mypy notes

## FORBIDDEN
- Missing return types
- Any usage without justification
- Untyped APIs