---
title: "Mutation Testing Skill - Air Market"
description: "Your tests pass, but you wonder if they would catch a real problem. Mutation testing deliberately changes your code in small ways and checks whether any test notices. This runs those checks on a Cloj…"
canonical: "https://airmarket.ai/app/mutation-testing"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Mutation Testing Skill

Skill by [Metabase](/@metabase)

# Mutation Testing Skill

Find out if your test suite would actually catch a bug

## What this does

Your tests pass, but you wonder if they would catch a real problem. Mutation testing deliberately changes your code in small ways and checks whether any test notices. This runs those checks on a Clojure namespace, then writes new tests for every change your existing tests failed to catch. The results arrive as a draft pull request, with the work tracked in Linear.

### Top 3 things it does for you

- Run mutation testing on a Clojure namespace
- Generate tests that kill surviving mutations
- Open draft PRs tracked in Linear

## Information

**Mutation Testing Skill at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Metabase](/@metabase) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 4 KB |
| Licence | _Not recorded_ |
| Repository | [metabase/metabase](https://github.com/metabase/metabase/tree/ed54e5c079d1b794f06eb39a9c2bf14a48e29157/.claude/skills/mutation-testing) |
| GitHub stars | 50,246 (as of Nov 2026) |
| Installs | 94, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Mutation Testing Skill and flagged nothing. AIR's verdict: **safe**.

**What Mutation Testing Skill's check was run against**

|  |  |
| --- | --- |
| Commit | ed54e5c079d1b794f06eb39a9c2bf14a48e29157 |
| Content hash | 36a94362526587481288460aaf514353dd363579243cce8d582dfec754eb0ca7 |
| Files read | [Browse the files at this exact commit](https://github.com/metabase/metabase/blob/ed54e5c079d1b794f06eb39a9c2bf14a48e29157/.claude/skills/mutation-testing/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Mutation Testing Skill](/security/mutation-testing)

## About Mutation Testing Skill

If you write Clojure and want to know whether your test suite holds up, run mutation testing against a namespace. Where a change slips through untouched by any test, that gap becomes visible.

For changes that survive, it generates tests meant to kill them. The work comes back as draft pull requests, with issue tracking handled through Linear.

## What's inside

- SKILL.md - instructions

## Questions

### Is Mutation Testing Skill safe to install?

AIR scanned this exact version of Mutation Testing Skill and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit ed54e5c079d1, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/mutation-testing.

### How do I install Mutation Testing Skill?

Open https://airmarket.ai/app/mutation-testing on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/metabase/metabase/tree/ed54e5c079d1b794f06eb39a9c2bf14a48e29157/.claude/skills/mutation-testing. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Metabase](/@metabase)

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Canonical URL: <https://airmarket.ai/app/mutation-testing>