testland/mutant-survival-triage
Normalizes a surviving-mutant record across StrykerJS, PIT, mutmut, and Mull into one shape, classifies why it survived (missing case, weak assertion, equivalent mutant, unreachable code, flaky killer), applies per-mutator heuristics for conditional-boundary, arithmetic-operator, statement-removal, and constant mutations, and drafts the specific test that would kill it. Includes the full read-only investigation workflow: take a mutation report (Stryker JSON / PIT XML / mutmut output / Mull JSON) plus the repo at the same commit, read each survivor's mutated line and covering tests, classify, and propose - never auto-rewriting tests. Treats equivalence as a judgment call, because deciding whether a mutant is equivalent to the original is undecidable in general, so a residual survivor rate is expected rather than a defect. Use when a mutation run has finished and the report lists surviving mutants (typically 5+) that nobody has yet explained or turned into concrete test cases.
77
97%
Does it follow best practices?
Run evals on this skill
Adds up to 20 points to the overall score
Low
Low-risk findings worth noting
tile.json
{
"name": "testland/mutant-survival-triage",
"version": "1.2.15",
"summary": "Normalizes a surviving-mutant record across StrykerJS, PIT, mutmut, and Mull into one shape, classifies why it survived (missing case, weak assertion, equivalent mutant, unreachable code, flaky killer), applies per-mutator heuristics for conditional-boundary, arithmetic-operator, statement-removal, and constant mutations, and drafts the specific test that would kill it. Includes the full read-only investigation workflow: take a mutation report (Stryker JSON / PIT XML / mutmut output / Mull JSON) plus the repo at the same commit, read each survivor's mutated line and covering tests, classify, and propose - never auto-rewriting tests. Treats equivalence as a judgment call, because deciding whether a mutant is equivalent to the original is undecidable in general, so a residual survivor rate is expected rather than a defect. Use when a mutation run has finished and the report lists surviving mutants (typically 5+) that nobody has yet explained or turned into concrete test cases.",
"private": false,
"skills": {
"mutant-survival-triage": {
"path": "SKILL.md"
}
}
}