The controller no longer subscribes to the alive message: HostBeats, its handler, the heartbeat-gap duration and a fixed silent bound (issue 1183, AC3, AC4, AC5)

internal/link/contracts_test.go

@@ -15,7 +15,7 @@ import (
 // exists (novox/hq to-be 45 Phase 2, ADR 0227 rule 2).
 func TestEveryConsumedKindHasAContract(t *testing.T) {
 	// What the controller can be handed, from the subjects it is granted and the ones it derives.
-	subjects := []string{EnrolSubject, BuiltSubject, ReportSubject("anchor"), AliveSubject("anchor"),
+	subjects := []string{EnrolSubject, BuiltSubject, ReportSubject("anchor"),
 		ToolsAliveSubject("anchor"), HealthSubject("anchor"), "mesh.mod.postgres.event.provisioner.failing"}
 	subjects = append(subjects, broker.ControllerFollows...)
 	subjects = append(subjects, broker.ControllerHears...)
@@ -83,3 +83,17 @@ func TestEveryConsumedKindHasAContract(t *testing.T) {
 		}
 	}
 }
+
+// 1183/AC3: the controller no longer takes the node-engine's alive message: its subject is no kind, so nothing is
+// subscribed to it and nothing hears it. The tool runner's tools-alive stays.
+func TestTheAliveMessageIsNoKindTheControllerHears(t *testing.T) { // 1183/AC3
+	if kind, known := kindOfSubject("mesh.control.anchor.alive"); known {
+		t.Fatalf("the controller still takes the alive message as %s", kind)
+	}
+	if kind, known := kindOfSubject(ToolsAliveSubject("anchor")); !known || kind != KindToolsHeartbeat {
+		t.Fatalf("the tool runner's tools-alive is %q, %v", kind, known)
+	}
+	if _, ok := Contracts["heartbeat"]; ok {
+		t.Fatal("a contract still names the alive message")
+	}
+}