Trace's post-hoc design-history review of the self-trust adoption found no conflicting prior decision and two boundaries worth pinning: erosion never regresses knowledge (no knowledge-level downgrade, no observer-awareness erasure, no Knowing certainty below its floor of 30), and self-trust is deliberately the only psyche axis — a second movable psyche stat reopens the 2026-07-05 minion-depth decision. A corroborated encounter applying no erosion is now explicit in both criteria. Defense: Docs-only amendment tightening plots.md criterion 12 and social.md pending criterion 9 before implementation; keeps the adopted extension inside detection.md's certainty-floor contract and the minion-depth boundary.