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mutmut

Mutation testing system

cosmic-ray

Mutation testing for Python

ordeal

Automated chaos testing for Python — fault injection, property assertions, and stateful exploration.

mutpy

MutPy is a mutation testing tool for Python 3.x source code

mutatest

Python mutation testing: test your tests! Safely run mutation trials without source code modifications and see what will get past your test suite.

universalmutator

Regexp based tool for mutating generic source code across numerous languages

muttfuzz

Fuzzing with mutants

irradiate

Fast mutation testing for Python

muteria

Software Analysis and Testing Framework

poodle

Effecient Mutation Testing for Python

interlock-mutmut

Mutation testing system

fest-mutate

An extremely fast mutation testing tool for Python

cihub

Stop writing YAML. CLI wizard configures 40+ CI tools (security, quality, mutation) for Java/Python in minutes. Run centrally or dispatch to repos. 3-tier config merge, profile system, multi-repo registry, and AI-powered triage. One hub, many repos, zero boilerplate.

pyllmut

A research-based LLM-driven mutant generator library for Python

eth-vertigo

Mutation Testing for Ethereum Smart Contracts

boggart

Lightweight, extensible, language-independent mutation testing.

poodle-test

Mutation Testing Tool

mutahunter

LLM Mutation Testing for any programming language

llm-sentry

Unified AI Reliability Platform. One install, 12 diagnostic engines. Zero-dependency LLM pipeline monitoring.

django-mutpy

Django integration for the mutation testing framework MutPy.

cosmic-ray-celery3-engine

Mutation testing for Python