diff --git a/docs/m17-m18-plan.md b/docs/m17-m18-plan.md
index d3e2a72..0348bf8 100644
--- a/docs/m17-m18-plan.md
+++ b/docs/m17-m18-plan.md
@@ -64,7 +64,7 @@ only when its definition of green holds.
       IPC MESSAGE_MAXIMUM (256); the startUserTask debug print removed — it
       sheared concurrent serial lines and was the scenario-flake root cause;
       `device-list` scenario; suite 54/54)
-- [ ] **merge** `feat/usb-xhci-bus` → main, push — **loop ends here**
+- [x] **merge** `feat/usb-xhci-bus` → main, push (merged 2026-07-13) — **plan complete**
 
 ---