cmd/mesh-controller/push.go

@@ -765,6 +765,6 @@ func raiseTheBus(ctx context.Context, inv *inventory.Inventory, address string)
 		return err
 	}
 	fmt.Printf("the bus at %s has its streams, and %d machine(s) can hear a declaration\n",
-		address, len(names))
+		broker.BareAddress(address), len(names))
 	return nil
 }

internal/broker/nats.go

@@ -169,7 +169,11 @@ func PermissionsFor(p Principal) (Permissions, error) {
 		// The controller owns the mesh's own traffic and the streams. It is the only writer of
 		// stream definitions (design 25 §3), so it alone reaches the JetStream API.
 		pub = []string{"mesh.control.>", "mesh.node.>", "$JS.API.>"}
-		sub = []string{"mesh.control.>", "$JS.API.>"}
+		// **And where its consumers deliver.** A push consumer delivers on `_DELIVER.<its name>`,
+		// and a client bound to it subscribes exactly that; the server refused it for every
+		// principal the first time one bound a consumer (2026-09-28). Each kind below is granted
+		// its own consumers' delivery subjects and no other's.
+		sub = []string{"mesh.control.>", "$JS.API.>", "_DELIVER." + ControllerName, "_DELIVER." + ControllerName + ".>"}
 
 		// Work the mesh's own flows submit to a role, and the outcomes they wait on (ADR 0121). A
 		// build is the one today: the controller asks, and reads the answer from the seat's event
@@ -252,7 +256,7 @@ func PermissionsFor(p Principal) (Permissions, error) {
 			"mesh.control." + p.Node + ".>",
 			"$JS.API.CONSUMER.INFO.NODES." + p.Node,
 		}
-		sub = []string{"mesh.node." + p.Node + ".declare"}
+		sub = []string{"mesh.node." + p.Node + ".declare", "_DELIVER." + p.Node}
 
 	case KindModule:
 		// 1. Its own namespace: it publishes its events there and serves its tools there. Nothing
@@ -285,7 +289,12 @@ func PermissionsFor(p Principal) (Permissions, error) {
 		}
 
 		// 3. Seats it holds: full participation.
+		// Its consumer's name, not ConsumerFor: that asks for these permissions to build the
+		// consumer, and would ask forever. A subject for a consumer that turns out not to exist
+		// grants nothing anybody can use.
+		sub = append(sub, "_DELIVER."+consumerDurable(p))
 		for _, s := range p.Holds {
+			sub = append(sub, "_DELIVER.SEAT_"+upperSnake(s.Name)+"_worker")
 			for _, a := range s.Accepts {
 				sub = append(sub, seatSubject(s, "accept", a))
 			}

internal/broker/testdata/composed.conf

@@ -25,7 +25,7 @@ accounts {
     users = [
       { user: "controller", password: "$2a$11$cccccccccccccccccccccc", permissions: {
         publish: { allow: ["$JS.ACK.CONTROL.controller.>", "$JS.ACK.EVENTS.controller.>", "$JS.API.>", "_INBOX.enrol.>", "mesh.control.>", "mesh.node.>", "mesh.seat.mesh-build-machine.accept.>"] }
-        subscribe: { allow: ["$JS.API.>", "_INBOX.controller.>", "mesh.control.>", "mesh.mod.mesh-catalog.event.catching-up", "mesh.mod.mesh-catalog.event.upgraded", "mesh.seat.mesh-build-machine.event.built"] }
+        subscribe: { allow: ["$JS.API.>", "_DELIVER.controller", "_DELIVER.controller.>", "_INBOX.controller.>", "mesh.control.>", "mesh.mod.mesh-catalog.event.catching-up", "mesh.mod.mesh-catalog.event.upgraded", "mesh.seat.mesh-build-machine.event.built"] }
         allow_responses: { max: 1, ttl: "1m" }
       } }
       { user: "enrol.one", password: "$2a$11$eeeeeeeeeeeeeeeeeeeeee", permissions: {
@@ -34,20 +34,20 @@ accounts {
       } }
       { user: "node.one", password: "$2a$11$nnnnnnnnnnnnnnnnnnnnnn", permissions: {
         publish: { allow: ["$JS.ACK.NODES.one.>", "$JS.API.CONSUMER.INFO.NODES.one", "mesh.control.one.>"] }
-        subscribe: { allow: ["_INBOX.node.one.>", "mesh.node.one.declare"] }
+        subscribe: { allow: ["_DELIVER.one", "_INBOX.node.one.>", "mesh.node.one.declare"] }
       } }
       { user: "one.telegram", password: "$2a$11$tttttttttttttttttttttt", permissions: {
         publish: { allow: ["$JS.ACK.EVENTS.one_telegram.>", "mesh.seat.telegram-sender.event.delivered", "mesh.seat.telegram-sender.event.failed"] }
-        subscribe: { allow: ["_INBOX.one.telegram.>", "mesh.mod.telegram.tool.status", "mesh.seat.telegram-sender.accept.send"] }
+        subscribe: { allow: ["_DELIVER.SEAT_TELEGRAM_SENDER_worker", "_DELIVER.one_telegram", "_INBOX.one.telegram.>", "mesh.mod.telegram.tool.status", "mesh.seat.telegram-sender.accept.send"] }
         allow_responses: { max: 1, ttl: "1m" }
       } }
       { user: "two.audit", password: "$2a$11$aaaaaaaaaaaaaaaaaaaaaa", permissions: {
         publish: { allow: ["$JS.ACK.EVENTS.two_audit.>"] }
-        subscribe: { allow: ["_INBOX.two.audit.>", "mesh.mod.shop.event.order.placed"] }
+        subscribe: { allow: ["_DELIVER.two_audit", "_INBOX.two.audit.>", "mesh.mod.shop.event.order.placed"] }
       } }
       { user: "two.shop", password: "$2a$11$ssssssssssssssssssssss", permissions: {
         publish: { allow: ["$JS.ACK.EVENTS.two_shop.>", "mesh.mod.shop.event.order.placed", "mesh.seat.telegram-sender.accept.send"] }
-        subscribe: { allow: ["_INBOX.two.shop.>"] }
+        subscribe: { allow: ["_DELIVER.two_shop", "_INBOX.two.shop.>"] }
       } }
     ]
   }