diff --git a/IMPLEMENTATION.md b/IMPLEMENTATION.md
index 044a4f9..dab2c4d 100644
--- a/IMPLEMENTATION.md
+++ b/IMPLEMENTATION.md
@@ -229,7 +229,7 @@ Each type lives in `src/FrameProcessor/Domain/`. Tests in `tests/FrameProcessor.
 - `mosquitto` broker with anonymous access on the local network.
 - Single network so the service can reach `mosquitto:1883`.
 
-### [ ] 10.3 End-to-end via compose
+### [x] 10.3 End-to-end via compose
 - `docker compose up --build` → `/health` returns `mqttConnected: true`.
 - Run the full `PLAN.md` §Verification checklist (steps 2–7).
 
@@ -237,7 +237,7 @@ Each type lives in `src/FrameProcessor/Domain/`. Tests in `tests/FrameProcessor.
 
 ## Phase 11 — Final verification
 
-### [ ] 11.1 Run `PLAN.md` verification checklist top to bottom
+### [x] 11.1 Run `PLAN.md` verification checklist top to bottom
 - All 8 steps pass (step 9, real frame, is optional from this codebase's perspective).
 
 ### [ ] 11.2 README