test(deadcode): reuse gateway restart intent writer

scripts/bench-gateway-restart.ts

@@ -6,6 +6,7 @@ import { tmpdir } from "node:os";
 import path from "node:path";
 import { performance } from "node:perf_hooks";
 import { pathToFileURL } from "node:url";
+import { writeGatewayRestartIntentSync } from "../src/infra/restart.js";
 import { parseStrictIntegerOption } from "./lib/dev-tooling-safety.ts";
 import { delay, stopChild, type StopChildResult } from "./lib/gateway-bench-child.ts";
 import {
@@ -177,7 +178,6 @@ const DEFAULT_RESTARTS = 5;
 const DEFAULT_TIMEOUT_MS = 30_000;
 const DEFAULT_POST_READY_DELAY_MS = 250;
 const DEFAULT_ENTRY = "dist/entry.js";
-const RESTART_INTENT_FILENAME = "gateway-restart-intent.json";
 const BOOLEAN_FLAGS = new Set(["--allow-failures", "--help", "-h", "--json"]);
 const VALUE_FLAGS = new Set([
   "--case",
@@ -833,27 +833,7 @@ function sanitizedEnv(
 }
 
 function writeRestartIntent(env: NodeJS.ProcessEnv, targetPid: number, reason: string): boolean {
-  const stateDir = env.OPENCLAW_STATE_DIR;
-  if (!stateDir) {
-    return false;
-  }
-  try {
-    mkdirSync(stateDir, { recursive: true });
-    const intentPath = path.join(stateDir, RESTART_INTENT_FILENAME);
-    writeFileSync(
-      intentPath,
-      `${JSON.stringify({
-        kind: "gateway-restart",
-        pid: targetPid,
-        createdAt: Date.now(),
-        reason,
-      })}\n`,
-      { mode: 0o600 },
-    );
-    return true;
-  } catch {
-    return false;
-  }
+  return writeGatewayRestartIntentSync({ env, reason, targetPid });
 }
 
 function readProcessFdCount(pid: number | undefined): number | null {