ImpactGate: A merge gate that scores structural decay AI adds

ImpactGate: A merge gate that scores the structural decay AI adds

ImpactGate is a GitHub merge gate that scores how much structural decay AI-generated code introduces. It blocks PRs that pass tests but degrade maintainability. The post doesn't disclose the scoring algorithm or thresholds, but the idea is clear: extend quality gates from correctness to structural health.