| Document | Role | Authority |
|---|---|---|
| Decision log | Append-only history of engineering decisions | Highest. Decisions govern |
| Requirements | Current requirements with stable IDs and status | Derived from decisions |
| Criteria | Machine-readable benchmark and gate criteria read by the evaluator | Preregistered, hash-linked |
| Traceability | Requirement → implementation → verification → result | Evidence record |
| Roadmap | Dependency-ordered phases and owner decision gates | Planning |
| Toolchain | Pinned compiler, build profiles, dependency policy in practice | Implements Q42 |
| Design guidance | Non-binding input for candidate generation | Advisory only |
Changing a requirement, criterion, or threshold takes a new decision record. See the decision log rules.