Join: mesh-knowledge's page address is no word of the environment

The overview page read MESH_KNOWLEDGE_PAGE, which nothing in the mesh
sets; only its bus test did, to serve no page. checks/environment,
which came with A3's merge, refuses such a read. The page listens on
the port its manifest declares; the test's bundle sets the package's
address empty instead.

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

modules/mesh-knowledge/cmd/mesh-knowledge/bus_test.go

@@ -155,7 +155,7 @@ func (w *busWorld) start(t *testing.T) (*bundle, string) {
 	_ = os.WriteFile(settings, []byte(`{"judge-model": "sonnet", "drafting": "off"}`), 0o600)
 	status := filepath.Join(dir, "health.json")
 	cmd := exec.Command(os.Args[0], "-test.run=^$")
-	cmd.Env = append(os.Environ(), bundleVar+"=1", "MESH_KNOWLEDGE_PAGE=off", "MESH_KNOWLEDGE_SETTINGS="+settings, "MESH_KNOWLEDGE_STATUS="+status,
+	cmd.Env = append(os.Environ(), bundleVar+"=1", "MESH_KNOWLEDGE_SETTINGS="+settings, "MESH_KNOWLEDGE_STATUS="+status,
 		"MESH_SERVED_MODULE="+Module, "MESH_MODULE="+Module, "MESH_NODE=test")
 	in, _ := cmd.StdinPipe()
 	out, _ := cmd.StdoutPipe()

modules/mesh-knowledge/cmd/mesh-knowledge/kit_test.go

@@ -38,6 +38,7 @@ func TestMain(m *testing.M) {
 		// The bundle the bus test starts: the knowledge base as the runtime launches it, its store in memory.
 		k := newKB(newMemStore())
 		k.Now = func() time.Time { return bundleDay }
+		pageAddress = ""
 		serve(k, os.Getenv("MESH_KNOWLEDGE_STATUS"))
 		os.Exit(0)
 	}

modules/mesh-knowledge/cmd/mesh-knowledge/page.go

@@ -16,10 +16,14 @@ import (
 	stdio "git.novox.be/novox/mesh-sdk/go"
 )
 
-// PageAddress is where the page listens unless MESH_KNOWLEDGE_PAGE says otherwise: the port the manifest declares under
-// `listens`, which the node's packet filter opens for this machine only.
+// PageAddress is where the page listens: the port the manifest declares under `listens`, which the node's packet filter
+// opens for this machine only.
 const PageAddress = ":8480"
 
+// pageAddress is where this process serves the page; empty serves none (the bus test's bundle, which runs beside other
+// tests on one machine). It is no word of the environment: nothing in the mesh sets one (checks/environment).
+var pageAddress = PageAddress
+
 // PageHandler renders the model as a page; any method but GET is refused, nothing is written.
 func PageHandler(o *Overview) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -129,12 +133,9 @@ func ServePage(k *KB) {
 			o.Due()
 		}
 	}()
-	addr := os.Getenv("MESH_KNOWLEDGE_PAGE")
+	addr := pageAddress
 	if addr == "" {
-		addr = PageAddress
-	}
-	if addr == "off" {
-		return // a test's bundle serves no page
+		return
 	}
 	srv := &http.Server{Addr: addr, Handler: PageHandler(o), ReadHeaderTimeout: 10 * time.Second}
 	logf("[mesh-knowledge] the overview page listens on %s", addr)