mutation-testing

SKILL.md

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; substitute muton and 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.