diff --git a/docs/plans/2026-07-21-gamewindow-slice-3-live-session.md b/docs/plans/2026-07-21-gamewindow-slice-3-live-session.md
index d7dab902..b4fc6b7c 100644
--- a/docs/plans/2026-07-21-gamewindow-slice-3-live-session.md
+++ b/docs/plans/2026-07-21-gamewindow-slice-3-live-session.md
@@ -41,8 +41,13 @@ character-selection UI or redesign the transport.
   convergent staged teardown, transport-free deterministic session tests,
   and invalid-endpoint validation before UDP allocation. Three-agent review
   clean. Release: 6,707 passed / 5 skipped.
-- [ ] E — GameWindow cutover (in progress).
-- [ ] F — final review, connected gate, and documentation closeout.
+- [x] E — GameWindow cutover (`6a5d9e2e`): one controller field, focused
+  lifecycle host, transactional event/command binding, call-time borrowed
+  session resolution, controller-backed retained/dev UI command providers,
+  unified shutdown, and structural regression gates proving the displaced
+  fields and lifecycle bodies remain absent. Three-agent review clean.
+  Release: 6,714 passed / 5 skipped.
+- [ ] F — final review, connected gate, and documentation closeout (in progress).
 
 ## 1. Outcome