Mutation Testing
Configures mewt or muton campaigns, analyzes surviving mutants, and investigates bugs...
Install
npx skills add trailofbits/skills --skill mutation-testing -g -a claude-code -y- Repository
- trailofbits/skills7.9k
- Category
- Testing
- Updated
- 7d ago
- License
- CC-BY-SA-4.0
- Context cost
- Lightabout 1,464 tokens
- Runs scripts
- No, instructions only
What it does
Configures mewt or muton campaigns, analyzes surviving mutants, and investigates bugs exposed by testing gaps. Use when setting up mutation testing, reviewing campaign results, identifying equivalent mutants, or finding bugs from surviving mutations.
Mutation Testing (mewt/muton)
Routes to the right mutation testing workflow and loads the references that workflow needs.
Note: muton and mewt share identical interfaces. Examples use
mewt; substitutemutonand its file names (muton.toml,muton.sqlite) for muton projects.
mewt --help and mewt <subcommand> --help are the source of truth for command-line behavior. Examples below reflect the mewt 4.x API; run --help when a flag looks unfamiliar or a command fails.
When to Use
Use this skill when the user:
- Mentions "mewt", "muton", or "mutation testing"
- Wants to configure, scope, or speed up a mutation testing campaign
- Wants to analyze mutation results, surviving/uncaught mutants, equivalent mutants, kill rate
- Wants to use mutation results to find bugs in the source code
When NOT to Use
Do not use this skill when the user asks about tests or line coverage without any mutation testing context.
Routing
Pick the workflow, then load it together with the references listed for it. Workflows and references do not load each other, that decision belongs here.
Setting up, scoping, or speeding up a campaign → workflows/configuration.md → Also load references/optimization-strategies.md when the campaign estimate is long enough to need trimming, or the user asks to make it faster.
Campaign finished, hunting for bugs in untested code → workflows/bug-hunter.md
