diff --git a/docker-dev/seed/seed-clusters.sql b/docker-dev/seed/seed-clusters.sql
index 801f95ed..ce15c214 100644
--- a/docker-dev/seed/seed-clusters.sql
+++ b/docker-dev/seed/seed-clusters.sql
@@ -2,9 +2,9 @@
 --
 -- Populates:
 --   ServerCluster   MAIN, SITE-A, SITE-B
---   ClusterNode     driver-a, driver-b  → MAIN
---                   site-a-1, site-a-2  → SITE-A
---                   site-b-1, site-b-2  → SITE-B
+--   ClusterNode     central-1, central-2 → MAIN
+--                   site-a-1, site-a-2   → SITE-A
+--                   site-b-1, site-b-2   → SITE-B
 --
 -- ServerCluster.NodeCount + RedundancyMode are coupled by CHECK constraint:
 --   NodeCount=1 ⇒ RedundancyMode='None'
@@ -32,7 +32,7 @@ IF NOT EXISTS (SELECT 1 FROM dbo.ServerCluster WHERE ClusterId = 'MAIN')
     VALUES
         ('MAIN', 'Main cluster', 'zb', 'docker-dev',
          2, 'Warm', 1,
-         'docker-dev seed — admin-a/admin-b control-plane, driver-a/driver-b OPC UA publishers.',
+         'docker-dev seed — central-1/central-2 fused admin+driver: UI + deploy singleton + MAIN OPC UA publishers.',
          'docker-dev-seed');
 
 IF NOT EXISTS (SELECT 1 FROM dbo.ServerCluster WHERE ClusterId = 'SITE-A')
@@ -41,7 +41,7 @@ IF NOT EXISTS (SELECT 1 FROM dbo.ServerCluster WHERE ClusterId = 'SITE-A')
     VALUES
         ('SITE-A', 'Site A', 'zb', 'site-a',
          2, 'Warm', 1,
-         'docker-dev seed — 2-node fused admin+driver cluster.',
+         'docker-dev seed — 2-node driver-only, managed by the central cluster over the shared mesh (empty until configured).',
          'docker-dev-seed');
 
 IF NOT EXISTS (SELECT 1 FROM dbo.ServerCluster WHERE ClusterId = 'SITE-B')
@@ -50,11 +50,11 @@ IF NOT EXISTS (SELECT 1 FROM dbo.ServerCluster WHERE ClusterId = 'SITE-B')
     VALUES
         ('SITE-B', 'Site B', 'zb', 'site-b',
          2, 'Warm', 1,
-         'docker-dev seed — 2-node fused admin+driver cluster.',
+         'docker-dev seed — 2-node driver-only, managed by the central cluster over the shared mesh (empty until configured).',
          'docker-dev-seed');
 
 ------------------------------------------------------------------------------
--- ClusterNode — main cluster OPC UA publishers
+-- ClusterNode — central cluster (MAIN UI + deploy singleton + OPC UA publishers)
 --
 -- NodeId is "<compose-service>:4053" so it matches what ClusterRoleInfo +
 -- ConfigPublishCoordinator derive from Akka.Cluster.Get(system).State.Members
@@ -62,15 +62,15 @@ IF NOT EXISTS (SELECT 1 FROM dbo.ServerCluster WHERE ClusterId = 'SITE-B')
 -- ClusterNode.NodeId; mismatched values cause FK 547 on deploy.
 ------------------------------------------------------------------------------
 
-IF NOT EXISTS (SELECT 1 FROM dbo.ClusterNode WHERE NodeId = 'driver-a:4053')
+IF NOT EXISTS (SELECT 1 FROM dbo.ClusterNode WHERE NodeId = 'central-1:4053')
     INSERT INTO dbo.ClusterNode
         (NodeId, ClusterId, Host, OpcUaPort, DashboardPort, ApplicationUri, ServiceLevelBase, Enabled, CreatedBy)
-    VALUES ('driver-a:4053', 'MAIN', 'driver-a', 4840, 8081, 'urn:OtOpcUa:driver-a', 200, 1, 'docker-dev-seed');
+    VALUES ('central-1:4053', 'MAIN', 'central-1', 4840, 8081, 'urn:OtOpcUa:central-1', 200, 1, 'docker-dev-seed');
 
-IF NOT EXISTS (SELECT 1 FROM dbo.ClusterNode WHERE NodeId = 'driver-b:4053')
+IF NOT EXISTS (SELECT 1 FROM dbo.ClusterNode WHERE NodeId = 'central-2:4053')
     INSERT INTO dbo.ClusterNode
         (NodeId, ClusterId, Host, OpcUaPort, DashboardPort, ApplicationUri, ServiceLevelBase, Enabled, CreatedBy)
-    VALUES ('driver-b:4053', 'MAIN', 'driver-b', 4840, 8081, 'urn:OtOpcUa:driver-b', 150, 1, 'docker-dev-seed');
+    VALUES ('central-2:4053', 'MAIN', 'central-2', 4840, 8081, 'urn:OtOpcUa:central-2', 150, 1, 'docker-dev-seed');
 
 ------------------------------------------------------------------------------
 -- ClusterNode — site A