diff --git a/agent-ui/.sync-state.json b/agent-ui/.sync-state.json
new file mode 100644
index 0000000..9b494a0
--- /dev/null
+++ b/agent-ui/.sync-state.json
@@ -0,0 +1,22 @@
+{
+  "last_synced_head": "b301153afb2a46bb005a1756059aebefe88539fc",
+  "last_sync_mode": "baseline",
+  "baseline_mode": "migration",
+  "agent_ui_paths": [
+    "agent-ui/README.md",
+    "agent-ui/USER_REVIEW.md",
+    "agent-ui/definition/index.md",
+    "agent-ui/definition/views/index.md",
+    "agent-ui/definition/views/alt-workbench/index.md",
+    "agent-ui/definition/views/dashboard/index.md",
+    "agent-ui/definition/components/index.md",
+    "agent-ui/definition/components/workbench-title-bar/index.md",
+    "agent-ui/definition/components/activity-rail/index.md",
+    "agent-ui/definition/components/agent-dock/index.md",
+    "agent-ui/definition/components/placeholder-panel/index.md",
+    "agent-ui/definition/components/status-panel/index.md",
+    "agent-ui/frame/index.md"
+  ],
+  "code_paths": [],
+  "notes": "Legacy agent-ui baseline migration. No code sync performed."
+}