diff --git a/history/2026-09-01-conformance-loop-handoff.md b/history/2026-09-01-conformance-loop-handoff.md
index 6948a05..60a03dd 100644
--- a/history/2026-09-01-conformance-loop-handoff.md
+++ b/history/2026-09-01-conformance-loop-handoff.md
@@ -123,3 +123,11 @@ secrets-engine in message `99bf84bf-18d2-4e63-a7ac-25078e1c72d5`. Revision
 evidence only. The required whitehat-owned probe, known-bad calibration, and
 verdict remain pending. Candidate record:
 `docs/conformance/2026-09-02-secrets-engine-t06-candidate.md`.
+
+Coordination receipts for the candidate:
+
+- Gate House acknowledged secrets-engine's implementation in reply
+  `118135d2-bf53-41c5-8bfb-11582359f1c3`.
+- Gate House handed the bounded fixture surface to whitehat-security in message
+  `cc19a1c4-2acf-448d-b90f-e9843a57a7d4`, preserving Whitehat ownership and
+  explicitly authorizing no live target or effect.
diff --git a/workplans/GH-WP-0001-foundation.md b/workplans/GH-WP-0001-foundation.md
index e745b4c..afff16b 100644
--- a/workplans/GH-WP-0001-foundation.md
+++ b/workplans/GH-WP-0001-foundation.md
@@ -140,4 +140,6 @@ calibrated result without authorizing a live probe. A concrete T-06 candidate
 is now recorded from secrets-engine revision `3cd9955`; its implementer suite
 passes 17/17, while independent known-bad calibration and verdict remain
 pending. Candidate:
-`docs/conformance/2026-09-02-secrets-engine-t06-candidate.md`.
+`docs/conformance/2026-09-02-secrets-engine-t06-candidate.md`. The bounded
+candidate was handed to whitehat-security in message
+`cc19a1c4-2acf-448d-b90f-e9843a57a7d4`.