diff --git a/docs/m17-m18-plan.md b/docs/m17-m18-plan.md
index 1df4010..53dd664 100644
--- a/docs/m17-m18-plan.md
+++ b/docs/m17-m18-plan.md
@@ -44,7 +44,7 @@ only when its definition of green holds.
       on the tick; bindSignals/signalsFrom/sendSignal/stop + timerOnce;
       runtime.service.run with the zero-length ping; VFS converted; `signals`
       scenario; suite 51/51)
-- [ ] **merge** `feat/process-lifecycle` → main, push
+- [x] **merge** `feat/process-lifecycle` → main, push (merged 2026-07-13)
 - [ ] **M18.1** — device-manager protocol: hello + restart policy (branch `feat/device-manager`)
 - [ ] **merge** `feat/device-manager` → main, push
 - [ ] **M18.2** — xHCI port scan + tree reports (branch `feat/usb-xhci-bus`)