mutation-testing
Skill1 starsChanged 15 days agoLicence not identifiedView on GitHub
Set up and run mutation testing with Stryker, including full-project and focused diff runs against the current review base, then use surviving mutants to strengthen weak or missing tests. Use as the end-of-phase PR-readiness gate after implementation and refactoring are complete, not inside each RED-GREEN increment. Also use when the user explicitly asks for mutation testing, Stryker, mutation score, or surviving-mutant analysis. For writing the tests themselves, see testing.
30 other projects use a version of this, 1 of them edited.
Adopted by
Most recently taken up by
- camunda/camundatheir own version, first seen Nov 8, 2026
- DnsQueen/orcinus-skillstheir own version, first seen Nov 8, 2026
- Integralist/agent-skillstheir own version, first seen Nov 1, 2026
- shangyiy/life-kittheir own version, first seen Nov 1, 2026
- Hakkadaikon/hymmetheir own version, first seen Oct 26, 2026
- proffesor-for-testing/agentic-qetheir own version, first seen Oct 25, 2026
Used with
Projects with it also use domain-modeling and code-review.
Other files people use alongside this one.
Files found in the same public projects as a version of this one, more often than they turn up anywhere else. Each project counts once, large collections count for less, and this file's own repository is left out.
GoogleSkilldomain-modeling
Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, record an architectural decision, or when another skill needs to maintain the domain model.
Also in 3 projects that use this
GoogleSkillcode-review
Adversarial systems, concurrency, memory-model, and architecture code review protocol. Use this skill whenever asked to review code, PRs, diffs, or branches in Filament.
Also in 5 projects that use this
Other versions30 projects use a version of this.
Word for word · 0
None found.
Edited · 1
- tae0y/python-project-template★ 1413% same
Wrote their own version · 29
- metabase/metabase★ 50ksame name
- recharts/recharts★ 28ksame name
- camunda/camunda★ 4.4ksame name
- ThibautBaissac/rails_ai_agents★ 665same name
- proffesor-for-testing/agentic-qe★ 524same name
- s3s-project/s3s★ 315same name
- jvm-skills/jvm-skills★ 140same name
- Amplicode/spring-skills★ 126same name
- GGGODLIN/gggodlin-cc-harness★ 73same name
- Integralist/agent-skills★ 23same name
19 more not listed
How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.
In this repository61 other files it gives its agents.
- CLAUDE.mdCLAUDE.md
- global/CLAUDE.mdCLAUDE.md
- api-designSkill
- bff-entry-pointsSkill
- codebase-designSkill
- domain-driven-designSkill
- evaluate-existing-solutionsSkill
- event-sourcingSkill
- hexagonal-architectureSkill
- improve-codebase-architectureSkill
- observabilitySkill
- secure-oauth-oidcSkill
- structure-codebaseSkill
- twelve-factorSkill
- acceptance-reviewSkill
- askSkill
- browser-ux-walkthroughSkill
- continueSkill
- delegateSkill
- delegating-github-issuesSkill
- double-checkSkill
- find-gapsSkill
- grillingSkill
- grill-meSkill
- grill-with-docsSkill
- planningSkill
- planSkill
- retroSkill
- reviewSkill
- specificationSkill
- stack-pull-requestsSkill
- storyboardSkill
- story-splittingSkill
- folder-structureSkill
- characterisation-testsSkill
- ci-debuggingSkill
- debuggingSkill
- engineering-practiceSkill
- finding-seamsSkill
- front-end-testingSkill
- functionalSkill
- pythonSkill
- react-performanceSkill
- react-testingSkill
- reduce-system-complexitySkill
- refactoringSkill
- refactor-scanSkill
- tdd-guardianSkill
- tddSkill
- test-design-reviewerSkill
- testingSkill
- typescript-strictSkill
- xstateSkill
- diagramsSkill
- expectationsSkill
- find-skillsSkill
- teachSkill
- technical-writingSkill
- ubiquitous-languageSkill
- writing-for-agentsSkill
- The first 60 shown.
The file
Show its rules and text
We split this skill into the rules it gives an agent
23 rules. 0 are common, 17 are distinctive, and 6 are very specific to this project.
0
Common
Most of the 27 edited versions we read keep these.
17
Distinctive
This author's own choices. Worth a look.
6
Very specific
Tied to their project's names, files or tools. Probably skip.
The licence could not be identified — read it at the source. We count its rules but don't quote them. Read them on GitHub.
“Common” is measured: kept by at least 6 in 10 of the 27 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
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