- consolidate evidence-based principles for Step 5/6/7 and B-axis matching layer - record CompositionUnit, candidate-based composition, and 4-tier terminology - defer bridge architecture and slot_payload evolution as scope-locked open items
- consolidate evidence-based principles for Step 5/6/7 and B-axis matching layer - record CompositionUnit, candidate-based composition, and 4-tier terminology - defer bridge architecture and slot_payload evolution as scope-locked open items