Stryker mutation
Skill a5c-ai/babysitter/library/specializations/qa-testing-automation/skills/stryker-mutation
Babysitter enforces obedience on agentic workforces and enables them to manage extremely complex tasks and workflows through deterministic, hallucination-free self-orchestration
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Stryker mutation testing for assessing test suite quality and effectiveness
SKILL.md
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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 implementationquality-gates.js- Mutation score gatesshift-left-testing.js- Early test quality validation
Dependencies
@stryker-mutator/core- Stryker core- Test runner plugins (jest-runner, karma-runner)
- Reporter plugins
Usage Example
{
kind: 'skill',
skill: {
name: 'stryker-mutation',
context: {
action: 'execute',
configFile: 'stryker.conf.json',
mutate: ['src/**/*.ts'],
thresholds: {
high: 80,
low: 60,
break: 50
}
}
}
}
Configuration
The skill uses stryker.conf.json or stryker.conf.js and supports incremental testing for faster feedback.