Solution: SQLite table: confidence_history (principle_id, old_score, new_score, timestamp, trigger, context). Principles dropping >0.3 from peak flagged for review. Storage: ~34K rows/year. Negligible.
v3 2026-04-05 Q Mapped to whitepaper sections
v2 2026-04-05 Q Imported SPEC-004 from model_specifications_v2.html
v1 2026-04-05 Q Created spec: SPEC-004: Confidence History / Belief Versioning