Pull the Node build seat's asks beside the tools, delivery first and at most the node's capacity (issue 1887 A3node, ADR 0525 §2-§6)

modules/mesh-build-node/cmd/mesh-build-node/main.go

@@ -55,6 +55,7 @@ func main() {
 		RegistryFile:        filepath.Join(home, "registry"),
 	}
 	m.Floor = floorOf(m.Node)
+	m.Settings = filepath.Join(home, "settings.json")
 	// Outside a launch by the runtime — a build, a check — there is no node and no state to write.
 	if m.Node != "" {
 		go m.Start(ctx)
@@ -65,7 +66,13 @@ func main() {
 		logf("announcing the states it keeps: %v", err)
 		os.Exit(1)
 	}
-	if err := stdio.Serve("", m.Tools(m.StepTools())); err != nil {
+	steps := m.StepTools()
+	puller := m.Puller(steps, nil)
+	if m.Node != "" {
+		// The seat's asks, pulled once Serve has the runtime's channel; a pull before it is said and tried again.
+		go func() { _ = puller.Pull(ctx) }()
+	}
+	if err := stdio.Serve("", append(m.Tools(steps), m.SeatTools(puller)...)); err != nil {
 		logf("%v", err)
 		os.Exit(1)
 	}