菜单
Test quality validation through mutation testing, assessing test suite effectiveness by introducing code mutations and measuring kill rate. Use when evaluating test quality, identifying weak tests, or proving tests actually catch bugs.
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/proffesor-for-testing/agentic-qe --skill mutation-testing命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
Ruflo is a multi-agent orchestration platform for AI coding agents (Claude Code, Cursor, Codex, Copilot, Gemini, Amp, +12 more). Use this skill when the user wants to (1) install/init ruflo in a project, (2) run multi-agent swarms with hierarchical coordination, (3) use ruflo's 314+ MCP tools for memory, routing, hooks, sub-agents, or workflows, (4) check ruflo status/version/doctor health, or (5) discover which of ruflo's 30+ plugins fits their task.
Build dependency-aware execution plans for complex Agentic QE, Ruflo, integration, migration, or multi-stream engineering programs. Use when Codex must turn research or requirements into phased work, select a small AQE fleet, map critical paths and parallel streams, define acceptance gates, or sequence risky changes. Use aqe-plan-quality instead when the primary output is only a test or quality plan.
Conduct evidence-first technical research for Agentic QE, Ruflo, related ruvnet projects, or external tools. Use when Codex must investigate a repository, compare current upstream changes, trace dependencies and history, distinguish verified facts from inference, or synthesize findings into actionable engineering recommendations. Do not use for a simple known-answer lookup or an implementation-only task.
正在显示 SKILL.md
基于 SOC 职业分类
| name | mutation-testing |
| description | Test quality validation through mutation testing, assessing test suite effectiveness by introducing code mutations and measuring kill rate. Use when evaluating test quality, identifying weak tests, or proving tests actually catch bugs. |
| category | specialized-testing |
| priority | high |
| tokenEstimate | 900 |
| agents | ["qe-test-generator","qe-coverage-analyzer","qe-quality-analyzer","qe-mutation-tester"] |
| implementation_status | optimized |
| optimization_version | 1 |
| last_optimized | "2025-12-02T00:00:00.000Z" |
| dependencies | [] |
| quick_reference_card | true |
| tags | ["mutation","stryker","test-quality","kill-rate","assertions","effectiveness"] |
| trust_tier | 3 |
| allowed-tools | ["Read","Write","Edit","Bash","Grep","Glob"] |
| validation | {"schema_path":"schemas/output.json","validator_path":"scripts/validate-config.json","eval_path":"evals/mutation-testing.yaml"} |
<default_to_action> When validating test quality or improving test effectiveness:
Quick Mutation Metrics:
Critical Success Factors:
| Score | Interpretation |
|---|---|
| 90%+ | Excellent test quality |
| 80-90% | Good, minor improvements |
| 60-80% | Needs attention |
| < 60% | Significant gaps |
| Category | Original | Mutant |
|---|---|---|
| Arithmetic | a + b | a - b |
| Relational | x >= 18 | x > 18 |
| Logical | a && b | a || b |
| Conditional | if (x) | if (true) |
| Statement | return x | (removed) |
// Original code
function isAdult(age) {
return age >= 18; // ← Mutant: change >= to >
}
// Strong test (catches mutation)
test('18 is adult', () => {
expect(isAdult(18)).toBe(true); // Kills mutant!
});
// Weak test (mutation survives)
test('19 is adult', () => {
expect(isAdult(19)).toBe(true); // Doesn't catch >= vs >
});
// Surviving mutant → Test needs boundary value
# Install
npm install --save-dev @stryker-mutator/core @stryker-mutator/jest-runner
# Initialize
npx stryker init
Configuration:
{
"packageManager": "npm",
"reporters": ["html", "clear-text", "progress"],
"testRunner": "jest",
"coverageAnalysis": "perTest",
"mutate": [
"src/**/*.ts",
"!src/**/*.spec.ts"
],
"thresholds": {
"high": 90,
"low": 70,
"break": 60
}
}
Run:
npx stryker run
Output:
Mutation Score: 87.3%
Killed: 124
Survived: 18
No Coverage: 3
Timeout: 1
// Surviving mutant: >= changed to >
function calculateDiscount(quantity) {
if (quantity >= 10) { // Mutant survives!
return 0.1;
}
return 0;
}
// Original weak test
test('large order gets discount', () => {
expect(calculateDiscount(15)).toBe(0.1); // Doesn't test boundary
});
// Fixed: Add boundary test
test('exactly 10 gets discount', () => {
expect(calculateDiscount(10)).toBe(0.1); // Kills mutant!
});
test('9 does not get discount', () => {
expect(calculateDiscount(9)).toBe(0); // Tests below boundary
});
// Analyze mutation score and generate fixes
await Task("Mutation Analysis", {
targetFile: 'src/payment.ts',
generateMissingTests: true,
minScore: 80
}, "qe-test-generator");
// Returns:
// {
// mutationScore: 0.65,
// survivedMutations: [
// { line: 45, operator: '>=', mutant: '>', killedBy: null }
// ],
// generatedTests: [
// 'test for boundary at line 45'
// ]
// }
// Coverage + mutation correlation
await Task("Coverage Quality Analysis", {
coverageData: coverageReport,
mutationData: mutationReport,
identifyWeakCoverage: true
}, "qe-coverage-analyzer");
aqe/mutation-testing/
├── mutation-results/* - Stryker reports
├── surviving/* - Surviving mutants
├── generated-tests/* - Tests to kill mutants
└── trends/* - Mutation score over time
const mutationFleet = await FleetManager.coordinate({
strategy: 'mutation-testing',
agents: [
'qe-test-generator', // Generate tests for survivors
'qe-coverage-analyzer', // Coverage correlation
'qe-quality-analyzer' // Quality assessment
],
topology: 'sequential'
});
High code coverage ≠ good tests. 100% coverage but weak assertions = useless. Mutation testing proves tests actually catch bugs.
Focus on critical paths first. Don't mutation test everything - prioritize payment, authentication, data integrity code.
With Agents: Agents run mutation analysis, identify surviving mutants, and generate missing test cases to kill them. Automated improvement of test quality.
After each mutation test run, append results to run-history.json in this skill directory:
node -e "
const fs = require('fs');
const h = JSON.parse(fs.readFileSync('.claude/skills/mutation-testing/run-history.json'));
h.runs.push({date: new Date().toISOString().split('T')[0], mutation_score_pct: SCORE, killed: KILLED, survived: SURVIVED});
fs.writeFileSync('.claude/skills/mutation-testing/run-history.json', JSON.stringify(h, null, 2));
"
Read run-history.json before each run to track score improvements over time.
/qe-test-generation to ensure tests exist/qe-coverage-analysis to prioritize improvement areas/qe-quality-assessment for ship/no-ship decision--testRunner jest explicitly if both jest and vitest are installed>= to > in date comparisons rarely gets killed — add boundary tests--mutate to target specific functions--concurrency defaults to CPU count which OOMs in containers — set to 2