diff --git a/docs/concepts/2026-07-29-memory-impl-plan.md b/docs/concepts/2026-07-29-memory-impl-plan.md
index f9bc7388b108..1e9ecc6712e4 100644
--- a/docs/concepts/2026-07-29-memory-impl-plan.md
+++ b/docs/concepts/2026-07-29-memory-impl-plan.md
@@ -1836,7 +1836,7 @@ Phase 5 is complete only when all of the following are demonstrated:
 - [ ] Documentation states the exact tested process-adversarial boundary and
       names the trusted Gateway, broker backend, selected memory plugin, and
       operator.
-- [ ] Hostile tenants continue to require separate
+- [x] Hostile tenants continue to require separate
       Gateway/process/credential/storage cells.
 
 ### Phase 5 rollback