mypy - Static Type Checking for Python

Run mypy static type checking on Python code with type hints.

Updated Jan 30, 2026
One-click install
npx skills add https://github.com/MacPhobos/research-mind --skill mypy-static-type-checking-for-python
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mypy - Static Type Checking for Python
Source: https://github.com/MacPhobos/research-mind/tree/main/.claude/skills/toolchains-python-tooling-mypy
Command: npx skills add https://github.com/MacPhobos/research-mind --skill mypy-static-type-checking-for-python

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill addresses the challenge of runtime errors caused by type mismatches in Python code, improving code maintainability and developer productivity.

Core Features & Use Cases

  • Static Type Checking: Catches type errors before runtime using type hints.
  • Gradual Typing: Allows incremental adoption of type safety in existing codebases.
  • IDE Support: Enhances code completion, refactoring, and error highlighting in IDEs.
  • Use Case: A developer can use this Skill to ensure that a function expecting an integer always receives one, preventing unexpected crashes and simplifying debugging.

Quick Start

Run mypy on the 'src/' directory to check for type errors.

Frequently Asked Questions about mypy - Static Type Checking for Python

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check for type errors in Python code before runtime?

You can check a specific directory like 'src/' to find type errors. This Skill uses mypy to analyze your Python code with type hints (PEP 484) before execution, catching type mismatches early to prevent unexpected runtime crashes.

Can I add static type checking to an existing Python codebase incrementally?

Yes, gradual typing allows incremental adoption of type safety in existing Python codebases. You can introduce static type checking module by module without needing to annotate the entire project at once.

Does static type checking work with Python frameworks like FastAPI and Django?

Yes, static type checking integrates with popular frameworks like FastAPI and Django. Analyzing code with type hints in these environments helps catch framework-specific type errors and improves overall code maintainability.

What is the best way to catch type mismatches in Python functions?

The best way is using static type checking with PEP 484 type hints. This approach ensures a function expecting an integer always receives one, preventing unexpected crashes and simplifying debugging before the code runs.

How does static type checking improve IDE support for Python?

Static type checking enhances IDE support by enabling better code completion, refactoring, and error highlighting. Analyzing type hints allows the IDE to understand function signatures and expected data structures.