Pi extension: real mutation testing score for your test suite (Stryker, mutmut, cargo-mutants) — /mutation-test

Prove your monitoring can see. Mutation testing for gates, evals and guardrails: it breaks the thing your check grades and requires the check to notice. A gate that stays green on a deliberately broken subject is BLIND.

Deterministic code quality validation orchestrator for TypeScript, Python, and Ruby projects

Mutation testing for LLM eval suites — measure whether your evals would actually catch a regression. JS/TS port in progress; Python package available now.

Mutation testing to validate test quality by introducing code changes and verifying tests catch them

Production-ready multi-agent CLI with unified memory, TUI, and code intelligence tools

Go-based metaswarm-compatible internal review harness for plans, specs, decompositions, code, acceptance evidence, PR readiness, and post-merge learning

Atlas — an open-source coding agent that gets cheaper, warier, and more trusted with use.