mutation-testing
Configures mewt or muton mutation testing campaigns — scopes targets, tunes timeouts, and optimizes long-running runs. Use when the user mentions mewt, muton, mutation testing, or wants to configure or optimize a mutation testing campaign.
npx skills add trailofbits/skills --skill mutation-testing --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Mutation Testing — Campaign Configuration (mewt/muton) > **Note**: muton and mewt share identical interfaces but target different languages — mewt for general-purpose languages (Rust, Solidity, Go, TypeScript, JavaScript), muton for TON smart contracts (Tact, Tolk, FunC). All examples use `mewt` commands, but they work exactly the same with `muton`. File names change accordingly: `mewt.toml` → `muton.toml`, `mewt.sqlite` → `muton.sqlite`. ## When to Use Use this skill when the user: - Mentions "mewt", "muton", or "mutation testing" - Needs to configure or optimize a mutation testing campaign - Wants to run `mewt run` and needs help getting set up first ## When NOT to Use Do not use this skill when the user: - Wants to analyze or report on completed campaign results - Asks about tests or coverage without mentioning mutation testing --- ## Quick Start Load [workflows/configuration.md](workflows/configuration.md) — a 5-phase guide from `mewt init` to a validated, ready-to-run campaign. **General question or unfamiliar command?** Run `mewt --help` or `mewt <subcommand> --help`, then assist. --- ## Reference Index | File | Content | |------|---------| | [workflows/configuration.md](wo
- When to Use
- When NOT to Use
- Quick Start
- Reference Index
- Essential Commands
- What Results Mean
Initialize and mutate mewt init # Create mewt.toml and mewt.sqlite mewt mutate [paths] # Generate mutants without running tests mewt run [paths] # Run the full campaign Inspect configuration and scope mewt print config # View effective configuration mewt print targets # Table of all targeted files mewt print mutations --language [lang] # Available mutation types mewt status # Mutant count and per-file breakdown Investigate specific mutants
What does the mutation-testing skill do?
Configures mewt or muton mutation testing campaigns — scopes targets, tunes timeouts, and optimizes long-running runs. Use when the user mentions mewt, muton, mutation testing, or wants to configure or optimize a mutation testing campaign.
How do I install it?
Run `npx skills add trailofbits/skills --skill mutation-testing --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From trailofbits/skills, a repository with 6,426 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.