Stryker Mutation Testing
Stryker mutation testing for assessing test suite quality and effectiveness
npx skills add a5c-ai/babysitter --skill stryker-mutation --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.
# Stryker Mutation Testing Skill ## Overview This skill provides expert-level capabilities for Stryker-based mutation testing, enabling test quality assessment by introducing code mutations and measuring test effectiveness. ## Capabilities ### Mutation Execution - Configure Stryker for JavaScript/TypeScript - Execute mutation testing runs - Configure mutation operators ### Score Analysis - Analyze mutation score - Track killed vs survived mutants - Identify weak test assertions ### Configuration - Configure mutators and test runners - Set up file patterns for mutation - Configure timeout settings ### Reporting - Generate HTML mutation reports - Dashboard integration for tracking - CI/CD report generation ### Optimization - Configure incremental mutation testing - Optimize mutation runs for large codebases - Parallel mutation execution ### Test Quality Insights - Identify gaps in test coverage - Recommend assertion improvements - Prioritize test enhancements ## Target Processes - `mutation-testing.js` - Mutation testing implementation - `quality-gates.js` - Mutation score gates - `shift-left-testing.js` - Early test quality validation ## Dependencies - `@stryker-mutator/core` - Stry
- Overview
- Capabilities
- Mutation Execution
- Score Analysis
- Configuration
- Reporting
- Optimization
- Test Quality Insights
- Target Processes
- Dependencies
- Usage Example
What does the Stryker Mutation Testing skill do?
Stryker mutation testing for assessing test suite quality and effectiveness
How do I install it?
Run `npx skills add a5c-ai/babysitter --skill stryker-mutation --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 a5c-ai/babysitter, a repository with 1,642 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.