Runs mutation testing on target repositories and strengthens tests to kill surviving mutants.
npx skills add https://github.com/arayaroma/ether --skill hardener-job-arayaroma
Please help me install this Agent Skill. Skill: hardener-job Source: https://github.com/arayaroma/ether/tree/main/skills/hardener-job Command: npx skills add https://github.com/arayaroma/ether --skill hardener-job-arayaroma
High-intent search queries and answers about installing and using this skill.
Mutation testing for JS/TS uses Stryker (@stryker-mutator/core). The skill checks for an existing stryker.conf file or offers to run npx stryker init if bootstrapping is allowed, installing it as a devDependency in the target repo rather than globally.
Coverage only shows a line executed during a test, not that the test asserted on its outcome. Mutation testing flips conditionals, changes boundaries, or drops lines, then checks whether any test fails, revealing behavior with no real test protection.
Python repositories use mutmut or cosmic-ray as the mutation testing tool. For other stacks, the skill checks the job's params.tool override or reports that no mutation tool is available rather than guessing.
No, it never modifies application source. A surviving mutant means a test is missing, not that the code is wrong, so the skill only adds targeted tests asserting on the specific behavior the mutant broke, then re-runs the mutation tool to confirm.
Schedule with a long interval using /loop, since mutation runs are expensive and can take minutes to hours on large suites. Avoid running more often than architect-job and prevent collisions with CI-triggered test runs on the same target.
HireTechUpUpAutomate daily job alerts for specified roles and locations.
krzemienskiInject mutations into source code and compute mutation scores from test results.
summarybotngIntroduce code mutations and measure test suite kill rates.
drvossGenerate and parse coverage reports to locate uncovered lines and branches.
