A-231: one reader of the invoke by which an asker names a build seat's queue

catalogue.QueueInvoke reads seat:<seat>.accept.<queue>, the form an asker names
the queue it asks in its manifest's invokes; the validator, the indexer's served-verb
edge and the grants part read it here.

Builds: design 47 G §544, §601, A-231

Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h

go/catalogue/invokes_test.go

@@ -17,6 +17,15 @@ func TestAManifestMaySayWhatItInvokes(t *testing.T) {
 	if len(m.Invokes) != 2 || m.Invokes[1] != "*" {
 		t.Fatalf("invokes not read: %v", m.Invokes)
 	}
+	// An asker names a build seat's queue as seat:<seat>.accept.<queue> (design 47 G A-231), and nothing else reads as one.
+	for invoke, want := range map[string]string{"seat:node-build-go.accept.check": "node-build-go/check",
+		"seat:node-build-go.run": "", "node-build-go.accept.check": "", "seat:node-build-go.accept.": "",
+		"seat:node-build-go.accept.check.mesh-catalog": "", "*": ""} {
+		seat, queue, ok := QueueInvoke(invoke)
+		if got := seat + "/" + queue; ok != (want != "") || ok && got != want {
+			t.Errorf("QueueInvoke(%q) = %s, %v; want %q", invoke, got, ok, want)
+		}
+	}
 	// And that its own secrets are the core's credentials (issue 774): read, and written back as said.
 	for raw, core := range map[string]bool{`{"module":"bus","version":"1","core-credentials":true}`: true, `{"module":"app","version":"1"}`: false} {
 		m, err := decodeForTest([]byte(raw))

go/catalogue/seat_invokes.go

@@ -18,3 +18,15 @@ func SeatInvoke(invoke string) (seat, verb string, ok bool) {
 	seat, verb, ok = strings.Cut(rest, ".")
 	return seat, verb, ok && seat != "" && verb != ""
 }
+
+// QueueInvoke splits an invoke `seat:<seat>.accept.<queue>`, by which an asker names a build seat's queue it asks (design 47 G
+// §544, §601, A-231), into its seat and queue; ok is false for anything else. The one reader of that form: the manifest
+// validator, the indexer's served-verb edge and the grants part read it here.
+func QueueInvoke(invoke string) (seat, queue string, ok bool) {
+	seat, verb, ok := SeatInvoke(invoke)
+	if !ok {
+		return "", "", false
+	}
+	queue, ok = strings.CutPrefix(verb, "accept.")
+	return seat, queue, ok && queue != "" && !strings.Contains(queue, ".")
+}