Node composer: while the seat list is unread the node's own composition is held too, whole, under the scope node; only what runs and the bootstrapped modules go on (ADR 0636 §1; issue 1966)

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

internal/selfcompose/selfcompose_test.go

@@ -1812,17 +1812,25 @@ func TestAnUnreadSeatListHoldsWhatIsNewAndHandsItAtTheRead(t *testing.T) {
 			t.Errorf("the node handed %s before it read the seat list", k)
 		}
 	}
-	if !handed["n1.node"] {
-		t.Errorf("the node's own composition was held with the module: %v", handed)
+	// The node's own composition folds modules and accounts it cannot judge before the read: held whole (the ruling of
+	// ADR 0636 §1), under the scope agent.NodeModule.
+	mu.Lock()
+	ownWhy := heldBy[agent.NodeModule]
+	mu.Unlock()
+	if ownWhy != WaitsForTheSeatListOwn || handed["n1.node"] {
+		t.Errorf("the node's own composition is held with %q and handed=%v, want %q and not handed: %v", ownWhy, handed["n1.node"], WaitsForTheSeatListOwn, handed)
 	}
-	// The reader reads the list and says so: the module is handed, with no timer.
+	// The reader reads the list and says so: the module and the node's own are handed, with no timer.
 	g.open.Store(true)
 	changed <- struct{}{}
-	for {
+	seen := map[string]bool{}
+	for !(seen["lemurs"] && seen["node"]) {
 		u := next(t, out)
-		if strings.Contains(u.Key, "lemurs") && !u.Deleted {
-			break
+		if u.Deleted {
+			continue
 		}
+		seen["lemurs"] = seen["lemurs"] || strings.Contains(u.Key, "lemurs")
+		seen["node"] = seen["node"] || u.Key == "n1.node"
 	}
 	mu.Lock()
 	still := heldBy["lemurs"]