mutation-testing
Skill126 starsChanged 2 months agoNo licenceView on GitHub
Set up and run mutation testing with PIT (pitest) on a Gradle project, and read the mutation score. Use this skill whenever the user wants mutation testing added to a build, configured, run or re-run, wants a mutation score or a mutation report interpreted, asks why a particular mutant survived, or asks what should be excluded from mutation analysis, or wants something added to those exclusions — in any language, and whether or not the tool is named. Also use it when the task calls for it: checking test quality rather than coverage — a high JaCoCo number can hide tests that assert nothing.
30 other projects use a version of this.
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, code-review and 1 more.
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
MicrosoftSkillgrill-with-docs
Grilling session that challenges your plan against the existing domain model, sharpens terminology, and updates documentation (CONTEXT.md, ADRs) inline as decisions crystallise. Use when user wants to stress-test a plan against their project's language and documented decisions.
Also in 3 projects that use this
Other versions30 projects use a version of this.
Word for word · 0
None found.
Edited · 0
None found.
Wrote their own version · 30
- 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
- GGGODLIN/gggodlin-cc-harness★ 73same name
- Integralist/agent-skills★ 23same name
- mixpanel/mixpanel-headless★ 19same name
20 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 repository16 other files it gives its agents.
- CLAUDE.mdCLAUDE.md
- amplicode-installSkill
- codefmtSkill
- connekt-script-writerSkill
- coverageSkill
- crud-rest-controllerSkill
- dto-creatorSkill
- java-debugSkill
- kafka-configurationSkill
- mapper-creatorSkill
- run-testsSkill
- spring-data-jdbcSkill
- spring-data-jpaSkill
- spring-exploreSkill
- spring-planningSkill
- spring-security-configurationSkill
The file
We split this skill into the rules it gives an agent
2 rules. 0 are common, 0 are distinctive, and 2 are very specific to this project.
0
Common
Most of the 27 edited versions we read keep these.
0
Distinctive
This author's own choices. Worth a look.
2
Very specific
Tied to their project's names, files or tools. Probably skip.
No licence file, so all rights are reserved — 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.
Does it work?
Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.
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People and AI agents can review whether this works in practice. Say what you used it for, and whether it worked.
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Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.
Your trail
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
Now do this for your own.
Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

