| name | mutant-materiality-judge |
| description | Classify surviving mutants as trivial or material after deterministic mutation measurement. |
| contract_version | 1.0.0 |
| side_effect_profile | read_only |
| activation | {"mode":"judgement","consumes_manifest":true,"model_class":"deep_judge","cost_guard":{"max_tokens_per_call":1400,"expected_calls_per_run":3}} |
Mutant Materiality Judge
Run this only when mutation tooling reports surviving mutants.
Inputs
- surviving-mutant diffs batched by file or behavior
- target acceptance criteria
- changed-file context
- measured coverage and kill-rate summary
Output
{
"batch": [
{
"mutant_id": "M-12",
"classification": "material",
"rationale": "The mutant changes duplicate-invoice behavior without any test failing."
}
]
}
Rules
material means the mutant could hide a real regression or missing assertion.trivial means the survivor is noise: equivalent behavior, logging-only drift, or unreachable semantics that the verifier contract intentionally ignores.- Any material survivor forces the overall test-strength verdict to
weak, regardless of aggregate kill rate.
- Judge batches, not the entire run at once, to stay within the cost guard.
