diff --git a/scripts/lib/format-generated-module.d.mts b/scripts/lib/format-generated-module.d.mts
index f4e1579af4b9..eb1bf34ebfe4 100644
--- a/scripts/lib/format-generated-module.d.mts
+++ b/scripts/lib/format-generated-module.d.mts
@@ -1,37 +1,7 @@
-/** Resolve the fastest available oxfmt command for a generated module path. */
-export function resolveGeneratedModuleFormatter(params: {
-  existsSync: (value: string) => boolean;
-  comSpec?: string;
-  env?: NodeJS.ProcessEnv;
-  npmExecPath?: string;
-  outputPath: string;
-  platform: NodeJS.Platform;
-  repoRoot: string;
-}):
-  | {
-      args: string[];
-      command: string;
-      env?: NodeJS.ProcessEnv;
-      shell: boolean;
-      windowsVerbatimArguments?: boolean;
-    }
-  | {
-      command: string;
-      args: unknown[];
-      shell: boolean;
-    };
 /** Format generated source in a temporary file and return the formatter output. */
 export function formatGeneratedModule(
-  source: unknown,
-  {
-    repoRoot,
-    outputPath,
-    errorLabel,
-  }: {
-    repoRoot: unknown;
-    outputPath: unknown;
-    errorLabel: unknown;
-  },
+  source: string,
+  options: { repoRoot: string; outputPath: string; errorLabel: string },
   deps?: Record<string, unknown>,
 ): string;
 export const GENERATED_MODULE_FORMAT_TIMEOUT_MS: 30000;
diff --git a/scripts/lib/format-generated-module.mjs b/scripts/lib/format-generated-module.mjs
index 7775b0d12460..447f87d9af8b 100644
--- a/scripts/lib/format-generated-module.mjs
+++ b/scripts/lib/format-generated-module.mjs
@@ -3,37 +3,11 @@ import { spawnSync } from "node:child_process";
 import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
-import { resolvePnpmRunner } from "../pnpm-runner.mjs";
 
 export const GENERATED_MODULE_FORMAT_TIMEOUT_MS = 30_000;
 export const GENERATED_MODULE_FORMAT_MAX_BUFFER_BYTES = 1024 * 1024;
 const FORMATTER_OUTPUT_TAIL_BYTES = 16 * 1024;
 
-/** Resolve the fastest available oxfmt command for a generated module path. */
-export function resolveGeneratedModuleFormatter(params) {
-  const platform = params.platform ?? process.platform;
-  const existsSync = params.existsSync ?? fs.existsSync;
-  const directFormatterPath = path.join(params.repoRoot, "node_modules", ".bin", "oxfmt");
-  const useDirectFormatter = platform !== "win32" && existsSync(directFormatterPath);
-  if (useDirectFormatter) {
-    return {
-      command: directFormatterPath,
-      args: ["--write", params.outputPath],
-      shell: false,
-    };
-  }
-
-  return resolvePnpmRunner({
-    comSpec: params.comSpec,
-    cwd: params.repoRoot,
-    env: params.env,
-    npmExecPath: params.npmExecPath,
-    nodeExecPath: params.nodeExecPath,
-    platform,
-    pnpmArgs: ["exec", "oxfmt", "--write", params.outputPath],
-  });
-}
-
 function outputText(value) {
   if (typeof value === "string") {
     return value;
@@ -86,31 +60,27 @@ function formatterFailureDetails(formatter) {
 /** Format generated source in a temporary file and return the formatter output. */
 export function formatGeneratedModule(source, { repoRoot, outputPath, errorLabel }, deps = {}) {
   const spawnSyncImpl = deps.spawnSync ?? spawnSync;
-  const resolveFormatter = deps.resolveFormatter ?? resolveGeneratedModuleFormatter;
   const resolvedRepoRoot = path.resolve(repoRoot);
-  const resolvedOutputPath = path.resolve(
-    resolvedRepoRoot,
-    path.isAbsolute(outputPath) ? path.relative(resolvedRepoRoot, outputPath) : outputPath,
-  );
   const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-generated-format-"));
-  const tempOutputPath = path.join(tempDir, path.basename(resolvedOutputPath));
+  const tempOutputPath = path.join(tempDir, path.basename(outputPath));
 
   try {
     fs.writeFileSync(tempOutputPath, source, "utf8");
-    const command = resolveFormatter({
-      existsSync: fs.existsSync,
-      outputPath: tempOutputPath,
-      repoRoot: resolvedRepoRoot,
-    });
-    const formatter = spawnSyncImpl(command.command, command.args, {
-      cwd: resolvedRepoRoot,
-      encoding: "utf8",
-      env: command.env ?? process.env,
-      maxBuffer: GENERATED_MODULE_FORMAT_MAX_BUFFER_BYTES,
-      shell: command.shell,
-      timeout: GENERATED_MODULE_FORMAT_TIMEOUT_MS,
-      windowsVerbatimArguments: command.windowsVerbatimArguments,
-    });
+    const formatter = spawnSyncImpl(
+      process.execPath,
+      [
+        path.join(resolvedRepoRoot, "node_modules", "oxfmt", "bin", "oxfmt"),
+        "--write",
+        tempOutputPath,
+      ],
+      {
+        cwd: resolvedRepoRoot,
+        encoding: "utf8",
+        maxBuffer: GENERATED_MODULE_FORMAT_MAX_BUFFER_BYTES,
+        shell: false,
+        timeout: GENERATED_MODULE_FORMAT_TIMEOUT_MS,
+      },
+    );
     if (formatter.error || formatter.status !== 0) {
       const details = formatterFailureDetails(formatter);
       throw new Error(`failed to format generated ${errorLabel}: ${details}`);
diff --git a/test/scripts/format-generated-module.test.ts b/test/scripts/format-generated-module.test.ts
index 725a60de4e1d..6de8533a081b 100644
--- a/test/scripts/format-generated-module.test.ts
+++ b/test/scripts/format-generated-module.test.ts
@@ -1,5 +1,5 @@
 // Format Generated Module tests cover format generated module script behavior.
-import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from "node:fs";
+import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
 import os from "node:os";
 import path from "node:path";
 import { afterEach, describe, expect, it } from "vitest";
@@ -7,7 +7,6 @@ import {
   formatGeneratedModule,
   GENERATED_MODULE_FORMAT_MAX_BUFFER_BYTES,
   GENERATED_MODULE_FORMAT_TIMEOUT_MS,
-  resolveGeneratedModuleFormatter,
 } from "../../scripts/lib/format-generated-module.mjs";
 
 const tempDirs: string[] = [];
@@ -15,9 +14,6 @@ const tempDirs: string[] = [];
 function makeRepoRoot() {
   const repoRoot = mkdtempSync(path.join(os.tmpdir(), "openclaw-format-generated-module-"));
   tempDirs.push(repoRoot);
-  const formatterDir = path.join(repoRoot, "node_modules", ".bin");
-  mkdirSync(formatterDir, { recursive: true });
-  writeFileSync(path.join(formatterDir, "oxfmt"), "#!/bin/sh\n", "utf8");
   return repoRoot;
 }
 
@@ -27,48 +23,7 @@ afterEach(() => {
   }
 });
 
-describe("resolveGeneratedModuleFormatter", () => {
-  it("uses the direct formatter binary on non-Windows when available", () => {
-    const formatterPath = path.join("/repo", "node_modules", ".bin", "oxfmt");
-
-    expect(
-      resolveGeneratedModuleFormatter({
-        existsSync: (value) => value === formatterPath,
-        outputPath: "/tmp/generated.ts",
-        platform: "linux",
-        repoRoot: "/repo",
-      }),
-    ).toEqual({
-      command: formatterPath,
-      args: ["--write", "/tmp/generated.ts"],
-      shell: false,
-    });
-  });
-
-  it("wraps pnpm.cmd explicitly on Windows instead of using shell mode", () => {
-    expect(
-      resolveGeneratedModuleFormatter({
-        comSpec: "C:\\Windows\\System32\\cmd.exe",
-        env: { PATH: "" },
-        existsSync: () => false,
-        npmExecPath: "",
-        outputPath: "C:\\Users\\test\\AppData\\Local\\Temp\\generated output.ts",
-        platform: "win32",
-        repoRoot: "C:\\repo",
-      }),
-    ).toEqual({
-      command: "C:\\Windows\\System32\\cmd.exe",
-      args: [
-        "/d",
-        "/s",
-        "/c",
-        'pnpm.cmd exec oxfmt --write "C:\\Users\\test\\AppData\\Local\\Temp\\generated output.ts"',
-      ],
-      shell: false,
-      windowsVerbatimArguments: true,
-    });
-  });
-
+describe("formatGeneratedModule", () => {
   it("runs generated module formatting with bounded child execution", () => {
     const repoRoot = makeRepoRoot();
     const calls: unknown[] = [];
@@ -81,14 +36,9 @@ describe("resolveGeneratedModuleFormatter", () => {
         repoRoot,
       },
       {
-        resolveFormatter: ({ outputPath }: { outputPath: string }) => ({
-          args: ["--write", outputPath],
-          command: "oxfmt",
-          shell: false,
-        }),
-        spawnSync: (_command: string, args: string[], options: unknown) => {
-          calls.push(options);
-          writeFileSync(args[1] ?? "", "export const value = 1;\n", "utf8");
+        spawnSync: (command: string, args: string[], options: unknown) => {
+          calls.push({ args, command, options });
+          writeFileSync(args[2] ?? "", "export const value = 1;\n", "utf8");
           return { status: 0, stderr: "", stdout: "" };
         },
       },
@@ -97,11 +47,19 @@ describe("resolveGeneratedModuleFormatter", () => {
     expect(formatted).toBe("export const value = 1;\n");
     expect(calls).toHaveLength(1);
     expect(calls[0]).toMatchObject({
-      cwd: repoRoot,
-      encoding: "utf8",
-      maxBuffer: GENERATED_MODULE_FORMAT_MAX_BUFFER_BYTES,
-      shell: false,
-      timeout: GENERATED_MODULE_FORMAT_TIMEOUT_MS,
+      args: [
+        path.join(repoRoot, "node_modules", "oxfmt", "bin", "oxfmt"),
+        "--write",
+        expect.stringMatching(/generated\.ts$/u),
+      ],
+      command: process.execPath,
+      options: {
+        cwd: repoRoot,
+        encoding: "utf8",
+        maxBuffer: GENERATED_MODULE_FORMAT_MAX_BUFFER_BYTES,
+        shell: false,
+        timeout: GENERATED_MODULE_FORMAT_TIMEOUT_MS,
+      },
     });
   });
 
@@ -120,11 +78,6 @@ describe("resolveGeneratedModuleFormatter", () => {
           repoRoot,
         },
         {
-          resolveFormatter: ({ outputPath }: { outputPath: string }) => ({
-            args: ["--write", outputPath],
-            command: "oxfmt",
-            shell: false,
-          }),
           spawnSync: () => ({
             error: timeoutError,
             signal: "SIGTERM",
@@ -147,11 +100,6 @@ describe("resolveGeneratedModuleFormatter", () => {
           repoRoot,
         },
         {
-          resolveFormatter: ({ outputPath }: { outputPath: string }) => ({
-            args: ["--write", outputPath],
-            command: "oxfmt",
-            shell: false,
-          }),
           spawnSync: () => ({
             error: timeoutError,
             signal: "SIGTERM",