jaredmcfarland

Add Mutation Testing — Testing skill for Claude Code

Testing community

Setup mutation testing with mutmut for Python projects.

How to install Add Mutation Testing

Installs to ~/.claude/commands/jaredmcfarland-mixpanel_data-add-mutation-testing.md

Terminal

mkdir -p ~/.claude/commands && curl -fsSL https://raw.githubusercontent.com/jaredmcfarland/mixpanel_data/HEAD/.claude/commands/add-mutation-testing.md -o ~/.claude/commands/jaredmcfarland-mixpanel_data-add-mutation-testing.md

Restart Claude Code, or start a new session, for it to be picked up.

What Add Mutation Testing does

description: Setup mutation testing with mutmut for Python projects

Setup Mutation Testing

Configure mutmut for mutation testing to evaluate Python test suite quality.

Instructions

1. Analyze Test Suite

Review existing pytest test coverage
Identify critical modules and business logic to target
Check current test quality (do tests verify values or just execution?)

2. Install and Configure

pip install mutmut

Add to `setup.cfg` or `pyproject.toml`:

Alternatives in Testing

Gstack — 15,000+ Garry Tan's exact Claude Code setup: 6 opinionated tools that serve as CEO, Eng Manager, Release Manag 33.9k ★
Test Runner — Run Python tests with pytest, unittest, or other testing frameworks 23.4k ★
Marketing Skills Versions — Current versions of all skills 13.8k ★