diff --git a/src/process/exec.ts b/src/process/exec.ts
index 3464a083894..7692fb9ad21 100644
--- a/src/process/exec.ts
+++ b/src/process/exec.ts
@@ -7,6 +7,7 @@ import { danger, shouldLogVerbose } from "../globals.js";
 import { markOpenClawExecEnv } from "../infra/openclaw-exec-env.js";
 import { logDebug, logError } from "../logger.js";
 import { resolveCommandStdio } from "./spawn-utils.js";
+import { resolveWindowsCommandShim } from "./windows-command.js";
 
 const execFileAsync = promisify(execFile);
 
@@ -76,19 +77,10 @@ function resolveNpmArgvForWindows(argv: string[]): string[] | null {
  * are handled by resolveNpmArgvForWindows to avoid spawn EINVAL (no direct .cmd).
  */
 function resolveCommand(command: string): string {
-  if (process.platform !== "win32") {
-    return command;
-  }
-  const basename = path.basename(command).toLowerCase();
-  const ext = path.extname(basename);
-  if (ext) {
-    return command;
-  }
-  const cmdCommands = ["pnpm", "yarn"];
-  if (cmdCommands.includes(basename)) {
-    return `${command}.cmd`;
-  }
-  return command;
+  return resolveWindowsCommandShim({
+    command,
+    cmdCommands: ["pnpm", "yarn"],
+  });
 }
 
 export function shouldSpawnWithShell(params: {
diff --git a/src/process/supervisor/adapters/child.ts b/src/process/supervisor/adapters/child.ts
index 44275df6e64..04d7e1d7aa1 100644
--- a/src/process/supervisor/adapters/child.ts
+++ b/src/process/supervisor/adapters/child.ts
@@ -1,22 +1,15 @@
 import type { ChildProcessWithoutNullStreams, SpawnOptions } from "node:child_process";
 import { killProcessTree } from "../../kill-tree.js";
 import { spawnWithFallback } from "../../spawn-utils.js";
+import { resolveWindowsCommandShim } from "../../windows-command.js";
 import type { ManagedRunStdin, SpawnProcessAdapter } from "../types.js";
 import { toStringEnv } from "./env.js";
 
 function resolveCommand(command: string): string {
-  if (process.platform !== "win32") {
-    return command;
-  }
-  const lower = command.toLowerCase();
-  if (lower.endsWith(".exe") || lower.endsWith(".cmd") || lower.endsWith(".bat")) {
-    return command;
-  }
-  const basename = lower.split(/[\\/]/).pop() ?? lower;
-  if (basename === "npm" || basename === "pnpm" || basename === "yarn" || basename === "npx") {
-    return `${command}.cmd`;
-  }
-  return command;
+  return resolveWindowsCommandShim({
+    command,
+    cmdCommands: ["npm", "pnpm", "yarn", "npx"],
+  });
 }
 
 export type ChildAdapter = SpawnProcessAdapter<NodeJS.Signals | null>;
diff --git a/src/process/windows-command.test.ts b/src/process/windows-command.test.ts
new file mode 100644
index 00000000000..47b1907fbf0
--- /dev/null
+++ b/src/process/windows-command.test.ts
@@ -0,0 +1,34 @@
+import { describe, expect, it } from "vitest";
+import { resolveWindowsCommandShim } from "./windows-command.js";
+
+describe("resolveWindowsCommandShim", () => {
+  it("leaves commands unchanged outside Windows", () => {
+    expect(
+      resolveWindowsCommandShim({
+        command: "pnpm",
+        cmdCommands: ["pnpm"],
+        platform: "linux",
+      }),
+    ).toBe("pnpm");
+  });
+
+  it("appends .cmd for configured Windows shims", () => {
+    expect(
+      resolveWindowsCommandShim({
+        command: "pnpm",
+        cmdCommands: ["pnpm", "yarn"],
+        platform: "win32",
+      }),
+    ).toBe("pnpm.cmd");
+  });
+
+  it("keeps explicit extensions on Windows", () => {
+    expect(
+      resolveWindowsCommandShim({
+        command: "npm.cmd",
+        cmdCommands: ["npm", "npx"],
+        platform: "win32",
+      }),
+    ).toBe("npm.cmd");
+  });
+});
diff --git a/src/process/windows-command.ts b/src/process/windows-command.ts
new file mode 100644
index 00000000000..c8e5981e2ef
--- /dev/null
+++ b/src/process/windows-command.ts
@@ -0,0 +1,20 @@
+import path from "node:path";
+import process from "node:process";
+
+export function resolveWindowsCommandShim(params: {
+  command: string;
+  cmdCommands: readonly string[];
+  platform?: NodeJS.Platform;
+}): string {
+  if ((params.platform ?? process.platform) !== "win32") {
+    return params.command;
+  }
+  const basename = path.basename(params.command).toLowerCase();
+  if (path.extname(basename)) {
+    return params.command;
+  }
+  if (params.cmdCommands.includes(basename)) {
+    return `${params.command}.cmd`;
+  }
+  return params.command;
+}