diff --git a/go/seats/meshbroker/contract_test.go b/go/seats/meshbroker/contract_test.go
index bc3deb6..2a8d382 100644
--- a/go/seats/meshbroker/contract_test.go
+++ b/go/seats/meshbroker/contract_test.go
@@ -19,7 +19,7 @@ func TestFixtures(t *testing.T) {
 	}{
 		{name: "created on the seat's subject", subject: "mesh.seat.mesh-broker.event.created", given: "{\"asked\":{\"max-mib\":64},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"held\":{\"max-mib\":64},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"storage-type\":\"ledger\",\"template\":\"ledger\"}", wire: "{\"asked\":{\"max-mib\":64},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"held\":{\"max-mib\":64},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"storage-type\":\"ledger\",\"template\":\"ledger\"}",
 			decode: func(b []byte) (any, error) { var v CreatedEvent; err := json.Unmarshal(b, &v); return v, err }, subjectIs: regexp.MustCompile("^mesh\\.seat\\.mesh-broker\\.event\\.created$")},
-		{name: "created with a ledger's binding as the bus module writes it", subject: "mesh.seat.mesh-broker.event.created", given: "{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_state_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh.bus.mesh-knowledge.ledger-snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"subject\":\"mesh.bus.mesh-knowledge.ledger\",\"template\":\"ledger\"},\"bus-name\":\"mesh-knowledge_ledger\",\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"revision\":7,\"storage-type\":\"ledger\",\"template\":\"ledger\"}", wire: "{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_state_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh.bus.mesh-knowledge.ledger-snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"subject\":\"mesh.bus.mesh-knowledge.ledger\",\"template\":\"ledger\"},\"bus-name\":\"mesh-knowledge_ledger\",\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"revision\":7,\"storage-type\":\"ledger\",\"template\":\"ledger\"}",
+		{name: "created with a ledger's binding as the bus module writes it", subject: "mesh.seat.mesh-broker.event.created", given: "{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh.ledger.mesh-knowledge.ledger.snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"subject\":\"mesh.ledger.mesh-knowledge.ledger.history\",\"template\":\"ledger\",\"types\":[{\"indexes\":[{\"name\":\"by-kind\",\"on\":[\"kind\"]}],\"name\":\"decision\",\"operations\":[{\"effect\":\"set-fields\",\"fields\":[\"title\",\"kind\"],\"name\":\"set\"}],\"schema\":{\"kind\":{\"type\":\"string\"},\"title\":{\"type\":\"string\"}}}]},\"bus-name\":\"mesh-knowledge_ledger\",\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"revision\":7,\"storage-type\":\"ledger\",\"template\":\"ledger\"}", wire: "{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh.ledger.mesh-knowledge.ledger.snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"subject\":\"mesh.ledger.mesh-knowledge.ledger.history\",\"template\":\"ledger\",\"types\":[{\"indexes\":[{\"name\":\"by-kind\",\"on\":[\"kind\"]}],\"name\":\"decision\",\"operations\":[{\"effect\":\"set-fields\",\"fields\":[\"title\",\"kind\"],\"name\":\"set\"}],\"schema\":{\"kind\":{\"type\":\"string\"},\"title\":{\"type\":\"string\"}}}]},\"bus-name\":\"mesh-knowledge_ledger\",\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"revision\":7,\"storage-type\":\"ledger\",\"template\":\"ledger\"}",
 			decode: func(b []byte) (any, error) { var v CreatedEvent; err := json.Unmarshal(b, &v); return v, err }, subjectIs: regexp.MustCompile("^mesh\\.seat\\.mesh-broker\\.event\\.created$")},
 		{name: "refused on the seat's subject", subject: "mesh.seat.mesh-broker.event.refused", given: "{\"asked\":{\"max-mib\":64},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"held\":{\"max-mib\":64},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"storage-type\":\"ledger\",\"template\":\"ledger\",\"why\":\"the bus refused it\"}", wire: "{\"asked\":{\"max-mib\":64},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"held\":{\"max-mib\":64},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"storage-type\":\"ledger\",\"template\":\"ledger\",\"why\":\"the bus refused it\"}",
 			decode: func(b []byte) (any, error) { var v RefusedEvent; err := json.Unmarshal(b, &v); return v, err }, subjectIs: regexp.MustCompile("^mesh\\.seat\\.mesh-broker\\.event\\.refused$")},
@@ -43,7 +43,7 @@ func TestFixtures(t *testing.T) {
 			decode: func(b []byte) (any, error) { var v DropInput; err := json.Unmarshal(b, &v); return v, err }, subjectIs: nil},
 		{name: "list answers every entry", subject: "", given: "{\"entries\":[{\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"options\":{\"max-mib\":64},\"settings\":{\"max-mib\":64},\"storage-type\":\"ledger\",\"template\":\"ledger\"}]}", wire: "{\"entries\":[{\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"options\":{\"max-mib\":64},\"settings\":{\"max-mib\":64},\"storage-type\":\"ledger\",\"template\":\"ledger\"}]}",
 			decode: func(b []byte) (any, error) { var v ListAnswer; err := json.Unmarshal(b, &v); return v, err }, subjectIs: nil},
-		{name: "list answers the binding of an entry the bus holds", subject: "", given: "{\"entries\":[{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh-knowledge_ledger.snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"template\":\"ledger\"},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"settings\":{\"max-mib\":64},\"storage-type\":\"ledger\",\"template\":\"ledger\"}]}", wire: "{\"entries\":[{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh-knowledge_ledger.snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"template\":\"ledger\"},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"settings\":{\"max-mib\":64},\"storage-type\":\"ledger\",\"template\":\"ledger\"}]}",
+		{name: "list answers the binding of an entry the bus holds", subject: "", given: "{\"entries\":[{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh.ledger.mesh-knowledge.ledger.snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"subject\":\"mesh.ledger.mesh-knowledge.ledger.history\",\"template\":\"ledger\",\"types\":[{\"indexes\":[{\"name\":\"by-kind\",\"on\":[\"kind\"]}],\"name\":\"decision\",\"operations\":[{\"effect\":\"set-fields\",\"fields\":[\"title\",\"kind\"],\"name\":\"set\"}],\"schema\":{\"kind\":{\"type\":\"string\"},\"title\":{\"type\":\"string\"}}}]},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"settings\":{\"max-mib\":64},\"storage-type\":\"ledger\",\"template\":\"ledger\"}]}", wire: "{\"entries\":[{\"binding\":{\"history\":\"mesh-knowledge_ledger\",\"indexes\":{\"by-kind\":\"mesh-knowledge_ledger_index-by-kind\"},\"local\":\"ledger\",\"snapshot\":\"mesh.ledger.mesh-knowledge.ledger.snapshot\",\"state\":\"mesh-knowledge_ledger_state\",\"storage\":\"ledger\",\"subject\":\"mesh.ledger.mesh-knowledge.ledger.history\",\"template\":\"ledger\",\"types\":[{\"indexes\":[{\"name\":\"by-kind\",\"on\":[\"kind\"]}],\"name\":\"decision\",\"operations\":[{\"effect\":\"set-fields\",\"fields\":[\"title\",\"kind\"],\"name\":\"set\"}],\"schema\":{\"kind\":{\"type\":\"string\"},\"title\":{\"type\":\"string\"}}}]},\"bus-name\":\"mesh-knowledge_ledger\",\"fill\":{\"bytes\":2048,\"cap\":67108864,\"count\":10},\"local-name\":\"ledger\",\"module\":\"mesh-knowledge\",\"settings\":{\"max-mib\":64},\"storage-type\":\"ledger\",\"template\":\"ledger\"}]}",
 			decode: func(b []byte) (any, error) { var v ListAnswer; err := json.Unmarshal(b, &v); return v, err }, subjectIs: nil},
 	}
 	for _, c := range cases {
diff --git a/seats/mesh-broker/fixtures/events.json b/seats/mesh-broker/fixtures/events.json
index 31a715f..b9f6a8f 100644
--- a/seats/mesh-broker/fixtures/events.json
+++ b/seats/mesh-broker/fixtures/events.json
@@ -36,13 +36,44 @@
         "local": "ledger",
         "storage": "ledger",
         "template": "ledger",
-        "subject": "mesh.bus.mesh-knowledge.ledger",
+        "subject": "mesh.ledger.mesh-knowledge.ledger.history",
         "history": "mesh-knowledge_ledger",
         "state": "mesh-knowledge_ledger_state",
         "indexes": {
-          "by-kind": "mesh-knowledge_ledger_state_index-by-kind"
+          "by-kind": "mesh-knowledge_ledger_index-by-kind"
         },
-        "snapshot": "mesh.bus.mesh-knowledge.ledger-snapshot"
+        "snapshot": "mesh.ledger.mesh-knowledge.ledger.snapshot",
+        "types": [
+          {
+            "name": "decision",
+            "schema": {
+              "title": {
+                "type": "string"
+              },
+              "kind": {
+                "type": "string"
+              }
+            },
+            "operations": [
+              {
+                "name": "set",
+                "effect": "set-fields",
+                "fields": [
+                  "title",
+                  "kind"
+                ]
+              }
+            ],
+            "indexes": [
+              {
+                "name": "by-kind",
+                "on": [
+                  "kind"
+                ]
+              }
+            ]
+          }
+        ]
       },
       "revision": 7
     }
diff --git a/seats/mesh-broker/fixtures/verbs.json b/seats/mesh-broker/fixtures/verbs.json
index 0a4cfb0..aba2e69 100644
--- a/seats/mesh-broker/fixtures/verbs.json
+++ b/seats/mesh-broker/fixtures/verbs.json
@@ -71,12 +71,44 @@
             "local": "ledger",
             "storage": "ledger",
             "template": "ledger",
+            "subject": "mesh.ledger.mesh-knowledge.ledger.history",
             "history": "mesh-knowledge_ledger",
             "state": "mesh-knowledge_ledger_state",
             "indexes": {
               "by-kind": "mesh-knowledge_ledger_index-by-kind"
             },
-            "snapshot": "mesh-knowledge_ledger.snapshot"
+            "snapshot": "mesh.ledger.mesh-knowledge.ledger.snapshot",
+            "types": [
+              {
+                "name": "decision",
+                "schema": {
+                  "title": {
+                    "type": "string"
+                  },
+                  "kind": {
+                    "type": "string"
+                  }
+                },
+                "operations": [
+                  {
+                    "name": "set",
+                    "effect": "set-fields",
+                    "fields": [
+                      "title",
+                      "kind"
+                    ]
+                  }
+                ],
+                "indexes": [
+                  {
+                    "name": "by-kind",
+                    "on": [
+                      "kind"
+                    ]
+                  }
+                ]
+              }
+            ]
           }
         }
       ]