remove plumber references

cmd/olliesrv/main.go

@@ -153,9 +153,9 @@ func runServer(sockPath string) {
 		srv.Kill()
 	}
 	os.Remove(sockPath)
-	// Remove only an empty namespace directory. A plumber or another Plan 9
-	// service may own other entries here; os.Remove never removes non-empty
-	// directories, so those entries are left untouched.
+	// Remove only an empty namespace directory. Other Plan 9 services may own
+	// entries here; os.Remove never removes non-empty directories, so those
+	// entries are left untouched.
 	_ = os.Remove(filepath.Dir(sockPath))
 	sink.Flush()
 }

doc/compatibility-roadmap.md

@@ -28,7 +28,7 @@ olliesrv
 - Context cancellation, goroutines, and process supervision.
 - Provider and agent runtime logic.
 
-The Plan 9 client dependency is a Go 9P implementation. `olliesrv` does not directly require the plan9port plumber. The default namespace lookup follows plan9port-style conventions (`$NAMESPACE`, then a derived `/tmp/ns...` path), but this can be replaced or made explicit later.
+The Plan 9 client dependency is a Go 9P implementation. `olliesrv` does not require an external namespace service. The default namespace lookup follows the standard `$NAMESPACE` convention, with a derived `/tmp/ns...` fallback; the service creates the directory when needed and removes it only when empty.
 
 ### Compatibility observations