diff --git a/docs/receipts/README.md b/docs/receipts/README.md
index 1808145..faeb1aa 100644
--- a/docs/receipts/README.md
+++ b/docs/receipts/README.md
@@ -22,6 +22,10 @@ Current authority order: **live receipt > committed receipt > memory**.
 - `kramer-ai-quality-research-map-20260701.json` — production AI quality posture: tests/receipts over code-volume hype.
 - `kelsey-hightower-beyond-code-research-map-20260702.json` — MVI/platform posture: remove before adding, platform as product/API/SLA.
 - `digg-tech-source-signal-research-map-20260702.json` — Digg Tech is advisory source discovery, not primary evidence.
+- `external-tool-audit-20260627.json` — external tool audit with trust boundaries and non-authoritative toolchain claims.
+- `factory-live-drift-20260621.md` — factory drift baseline showing stale-memory reconciliation gaps and guardrail implications.
+- `memory-b-cell-20260621.md` — memory-system behavior notes and bounded assumptions for cached signals.
+- `verify-cycle-apple-20260619.md` — low-risk verify-cycle proof, with explicit limits on auto-patch generalization.
 
 ## Memory quarantine