ModelForge/docs/architecture/adr/0020-immutable-evaluation-suite-revisions.md

ADR 0020 — Evaluation suite revisions are immutable

Status: accepted

Queries, relevance labels/grades, critical flags, metrics, top-K and retrieval configuration form one content-digested revision. Runs reference that revision permanently. A change creates a new revision, preserving reproducibility and preventing retrospective baseline changes.