F3: mesh-build-go and mesh-build-node follow the drops other holders write, and a module with no watch says so (ADR 0664 §4, issue 1748 review 1)

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

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

@@ -51,6 +51,7 @@ func main() {
 		Pauses:              stdio.State(sdkstep.PausesState).Put,
 		ReadPauses:          readOf(stdio.State(sdkstep.PausesState)),
 		ForgetPause:         stdio.State(sdkstep.PausesState).Delete,
+		WatchPauses:         stdio.State(sdkstep.PausesState).Watch,
 		ReadToolchainsState: readOf(stdio.State(seat.StateToolchains)),
 		Work:                WorkDir,
 		Run:                 dforgekey.ExecRunnerClean(0),

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

@@ -228,3 +228,15 @@ func TestParseNodeVersion(t *testing.T) {
 		t.Errorf("accepted a text that is not `node --version`'s")
 	}
 }
+
+// ADR 0664 §4 (issue 1748, review 1): the module follows the drops other holders write in the shared pauses state, or a drop
+// served by another node would never end a step running here. main wires the watch.
+func TestMainWiresTheWatchOfTheDrops(t *testing.T) {
+	raw, err := os.ReadFile("main.go")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(raw), "WatchPauses:") {
+		t.Error("main.go does not set Module.WatchPauses: a drop written by another holder would not end a running step")
+	}
+}