diff --git a/plans/2026-08-05-agent-execution-safety-qemu-guest-agent-gate.md b/plans/done/2026-08-05-agent-execution-safety-qemu-guest-agent-gate.md
similarity index 100%
rename from plans/2026-08-05-agent-execution-safety-qemu-guest-agent-gate.md
rename to plans/done/2026-08-05-agent-execution-safety-qemu-guest-agent-gate.md
diff --git a/plans/index.md b/plans/index.md
index 1fd4e41..9f33cfc 100644
--- a/plans/index.md
+++ b/plans/index.md
@@ -20,7 +20,7 @@ went sideways, open an investigation.
 | 2026-07-20 | [Mascot physics/window-interaction audit](2026-07-20-mascot-physics-audit.md) | P0–P2 implemented; P3 ("cool stuff") ideas open |
 | 2026-07-21 | [Frontend as OS + Apps — architecture audit & refactor](2026-07-21-frontend-os-apps-architecture.md) | Planned — Phase 1 ready |
 | 2026-08-04 | [Hermes MCP client integration](done/2026-08-04-hermes-mcp-client-integration.md) | Done — deployed |
-| 2026-08-05 | [Agent execution safety: QEMU guest agent gate + host-mutation guard](2026-08-05-agent-execution-safety-qemu-guest-agent-gate.md) | Planned |
+| 2026-08-05 | [Agent execution safety: QEMU guest agent gate + host-mutation guard](done/2026-08-05-agent-execution-safety-qemu-guest-agent-gate.md) | Done — implemented (1b9c761) |
 
 ## Done