fix(build): suppress singleton smoke deprecation noise

scripts/test-built-plugin-singleton.mjs

@@ -5,6 +5,41 @@ import path from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";
 import { stageBundledPluginRuntime } from "./stage-bundled-plugin-runtime.mjs";
 
+const warningFilterKey = Symbol.for("openclaw.warning-filter");
+
+function installProcessWarningFilter() {
+  if (globalThis[warningFilterKey]?.installed) {
+    return;
+  }
+
+  const originalEmitWarning = process.emitWarning.bind(process);
+  process.emitWarning = (...args) => {
+    const [warningArg, secondArg, thirdArg] = args;
+    const warning =
+      warningArg instanceof Error
+        ? {
+            name: warningArg.name,
+            message: warningArg.message,
+            code: warningArg.code,
+          }
+        : {
+            name: typeof secondArg === "string" ? secondArg : secondArg?.type,
+            message: typeof warningArg === "string" ? warningArg : undefined,
+            code: typeof thirdArg === "string" ? thirdArg : secondArg?.code,
+          };
+
+    if (warning.code === "DEP0040" && warning.message?.includes("punycode")) {
+      return;
+    }
+
+    return Reflect.apply(originalEmitWarning, process, args);
+  };
+
+  globalThis[warningFilterKey] = { installed: true };
+}
+
+installProcessWarningFilter();
+
 const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
 const smokeEntryPath = path.join(repoRoot, "dist", "plugins", "build-smoke-entry.js");
 assert.ok(fs.existsSync(smokeEntryPath), `missing build output: ${smokeEntryPath}`);