diff --git a/agent-zero-fix-summary.prose.md b/agent-zero-fix-summary.prose.md
index 0f1029f..62980b2 100644
--- a/agent-zero-fix-summary.prose.md
+++ b/agent-zero-fix-summary.prose.md
@@ -86,6 +86,15 @@ sudo docker exec agent-zero supervisorctl restart run_ui
 
 **Result**: Process restarted (PID 3320), services running.
 
+### Fix 4: Full Container Restart (Required)
+```bash
+sudo docker restart agent-zero
+```
+
+**Why needed**: The `run_ui` process was caching the old API key in memory. A full container restart was required to force Agent Zero to reload the `.env` file with the new OpenRouter key.
+
+**Result**: All services restarted cleanly, no more 401 errors.
+
 ---
 
 ## Infrastructure Documentation