feat(lns): add ipc handler lifecycle hook

Co-Authored-By: Virgil <virgil@lethean.io>

lns.go

@@ -37,6 +37,9 @@ type Service struct {
 var (
 	_ core.Startable = (*Service)(nil)
 	_ core.Stoppable = (*Service)(nil)
+	_ interface {
+		HandleIPCEvents(*core.Core, core.Message) core.Result
+	} = (*Service)(nil)
 )
 
 // serviceOptions holds configuration for the LNS service.
@@ -112,6 +115,14 @@ func (s *Service) OnShutdown(context.Context) core.Result {
 	return core.Result{OK: true}
 }
 
+// HandleIPCEvents satisfies Core's IPC handler discovery.
+//
+//	core.New(core.WithService(lns.Register))
+//	// LNS registers a no-op IPC handler so it can join the bus cleanly.
+func (s *Service) HandleIPCEvents(*core.Core, core.Message) core.Result {
+	return core.Result{OK: true}
+}
+
 func canonicalizeName(name any) (string, bool) {
 	switch v := name.(type) {
 	case string:

lns_test.go

@@ -26,6 +26,14 @@ func TestServiceLifecycleHooks(t *testing.T) {
 	}
 }
 
+func TestServiceHandleIPCEvents(t *testing.T) {
+	svc := &Service{}
+
+	if got := svc.HandleIPCEvents(nil, nil); !got.OK {
+		t.Fatalf("HandleIPCEvents returned %#v, want OK", got)
+	}
+}
+
 func TestServiceResolve(t *testing.T) {
 	svc := &Service{}