node-engine seat: a node's windows, busy, strays and filters are lists, as the engine writes them (the contract said objects and refused every real value; ADR 0634; issue 1966)

Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i

go/clients/nodeengineclient/have_test.go

@@ -148,3 +148,16 @@ func TestHealthAndDataCodecs(t *testing.T) {
 		t.Errorf("node key %q %v", k, err)
 	}
 }
+
+// The lists a node's facts carry (windows, busy, strays, filters) are arrays on the bus, as the engine has always written
+// them; the contract once said objects and refused every real value.
+func TestHaveNodeReadsTheListsTheEngineWrites(t *testing.T) {
+	raw := []byte(`{"v":1,"windows":[{"step":"backup"}],"busy":[{"id":"x"}],"strays":[{"kind":"container"}],"filters":[{"name":"f"}]}`)
+	n, err := DecodeHaveNode(raw)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(n.Windows) != 1 || len(n.Busy) != 1 || len(n.Strays) != 1 || len(n.Filters) != 1 {
+		t.Fatalf("lists lost: %+v", n)
+	}
+}