diff --git a/.gitignore b/.gitignore
index f48ab40..94b3908 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,6 +43,9 @@ frontend/coverage/
 # Volatile agent live-state snapshot ("who is doing what right now", lot LS2):
 # rebuilt at runtime, keyed last-writer-wins — not versioned (unlike .ideai/memory/).
 .ideai/live-state.json
+# UI layout runtime state (active layout id + session ids) — machine-local,
+# rebuilt at runtime, last-writer-wins — not versioned (same class as live-state.json).
+/.ideai/layouts.json
 
 # ─── Editors / OS ───────────────────────────────────────────────────────────
 .idea/
diff --git a/.ideai/layouts.json b/.ideai/layouts.json
deleted file mode 100644
index 645f12f..0000000
--- a/.ideai/layouts.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "version": 1,
-  "activeId": "49c6b0fc-13c1-40f5-9464-d3248ab54597",
-  "layouts": [
-    {
-      "id": "49c6b0fc-13c1-40f5-9464-d3248ab54597",
-      "name": "Default",
-      "kind": "terminal",
-      "tree": {
-        "root": {
-          "type": "leaf",
-          "node": {
-            "id": "852f5128-5b98-4d36-9a18-e49a57fc4940"
-          }
-        }
-      }
-    }
-  ]
-}