fix(test): guard kitchen sink rpc cli args

scripts/e2e/kitchen-sink-rpc-walk.mjs

@@ -85,6 +85,15 @@ export function shouldPrintHelp(argv) {
   return argv.some((arg) => arg === "--help" || arg === "-h");
 }
 
+export function validateCliArgs(argv) {
+  for (const arg of argv) {
+    if (arg === "--help" || arg === "-h") {
+      continue;
+    }
+    throw new Error(`Unknown argument: ${arg}`);
+  }
+}
+
 export function readPositiveInt(raw, fallback, label = "value") {
   const text = String(raw || "").trim();
   if (!text) {
@@ -2597,9 +2606,16 @@ export async function main() {
 }
 
 if (process.argv[1] && path.resolve(process.argv[1]) === fileURLToPath(import.meta.url)) {
-  if (shouldPrintHelp(process.argv.slice(2))) {
+  const argv = process.argv.slice(2);
+  if (shouldPrintHelp(argv)) {
     process.stdout.write(usage());
   } else {
+    try {
+      validateCliArgs(argv);
+    } catch (error) {
+      console.error(error instanceof Error ? error.message : String(error));
+      process.exit(1);
+    }
     await main();
   }
 }

test/scripts/kitchen-sink-rpc-walk.test.ts

@@ -55,6 +55,7 @@ import {
   tailFile,
   unwrapRpcPayload,
   usesBuiltOpenClawEntry,
+  validateCliArgs,
   waitForGatewayReady,
 } from "../../scripts/e2e/kitchen-sink-rpc-walk.mjs";
 import { cleanupTempDirs, makeTempDir } from "../helpers/temp-dir.js";
@@ -116,6 +117,23 @@ describe("kitchen-sink RPC isolated state", () => {
     expect(shouldPrintHelp([])).toBe(false);
   });
 
+  it("rejects unknown CLI args before creating temp state", async () => {
+    expect(() => validateCliArgs(["--wat"])).toThrow("Unknown argument: --wat");
+
+    const error = await runCommand(process.execPath, [
+      "scripts/e2e/kitchen-sink-rpc-walk.mjs",
+      "--wat",
+    ]).then(
+      () => undefined,
+      (caught: unknown) => caught as Error & { stderr?: string; stdout?: string },
+    );
+
+    expect(error).toBeDefined();
+    expect(error?.stdout).toBe("");
+    expect(error?.stderr?.trim()).toBe("Unknown argument: --wat");
+    expect(error?.stderr).not.toContain("temp root preserved");
+  });
+
   it("rejects loose numeric env values before they bypass runtime guardrails", () => {
     expect(readPositiveInt(undefined, 60_000)).toBe(60_000);
     expect(readPositiveInt("", 60_000)).toBe(60_000);