diff --git a/scripts/lib/bundled-extension-manifest.ts b/scripts/lib/bundled-extension-manifest.ts
new file mode 100644
index 00000000000..07053e943eb
--- /dev/null
+++ b/scripts/lib/bundled-extension-manifest.ts
@@ -0,0 +1,71 @@
+export type ExtensionPackageJson = {
+  name?: string;
+  version?: string;
+  dependencies?: Record<string, string>;
+  optionalDependencies?: Record<string, string>;
+  openclaw?: {
+    install?: {
+      npmSpec?: string;
+    };
+    releaseChecks?: {
+      rootDependencyMirrorAllowlist?: string[];
+    };
+  };
+};
+
+export type BundledExtension = { id: string; packageJson: ExtensionPackageJson };
+export type BundledExtensionMetadata = BundledExtension & {
+  npmSpec?: string;
+  rootDependencyMirrorAllowlist: string[];
+};
+
+export function normalizeBundledExtensionMetadata(
+  extensions: BundledExtension[],
+): BundledExtensionMetadata[] {
+  return extensions.map((extension) => ({
+    ...extension,
+    npmSpec:
+      typeof extension.packageJson.openclaw?.install?.npmSpec === "string"
+        ? extension.packageJson.openclaw.install.npmSpec.trim()
+        : undefined,
+    rootDependencyMirrorAllowlist:
+      extension.packageJson.openclaw?.releaseChecks?.rootDependencyMirrorAllowlist?.filter(
+        (entry): entry is string => typeof entry === "string" && entry.trim().length > 0,
+      ) ?? [],
+  }));
+}
+
+export function collectBundledExtensionManifestErrors(extensions: BundledExtension[]): string[] {
+  const errors: string[] = [];
+
+  for (const extension of extensions) {
+    const install = extension.packageJson.openclaw?.install;
+    if (
+      install &&
+      (!install.npmSpec || typeof install.npmSpec !== "string" || !install.npmSpec.trim())
+    ) {
+      errors.push(
+        `bundled extension '${extension.id}' manifest invalid | openclaw.install.npmSpec must be a non-empty string`,
+      );
+    }
+
+    const allowlist = extension.packageJson.openclaw?.releaseChecks?.rootDependencyMirrorAllowlist;
+    if (allowlist === undefined) {
+      continue;
+    }
+    if (!Array.isArray(allowlist)) {
+      errors.push(
+        `bundled extension '${extension.id}' manifest invalid | openclaw.releaseChecks.rootDependencyMirrorAllowlist must be an array of non-empty strings`,
+      );
+      continue;
+    }
+    const invalidEntries = allowlist.filter((entry) => typeof entry !== "string" || !entry.trim());
+    if (invalidEntries.length > 0) {
+      errors.push(
+        `bundled extension '${extension.id}' manifest invalid | openclaw.releaseChecks.rootDependencyMirrorAllowlist must contain only non-empty strings`,
+      );
+    }
+  }
+
+  return errors;
+}
diff --git a/scripts/release-check.ts b/scripts/release-check.ts
index df79b69f25c..fe2a9a1ea9c 100755
--- a/scripts/release-check.ts
+++ b/scripts/release-check.ts
@@ -4,29 +4,18 @@ import { execSync } from "node:child_process";
 import { readdirSync, readFileSync } from "node:fs";
 import { join, resolve } from "node:path";
 import { pathToFileURL } from "node:url";
+import {
+  collectBundledExtensionManifestErrors,
+  normalizeBundledExtensionMetadata,
+  type BundledExtension,
+  type ExtensionPackageJson as PackageJson,
+} from "./lib/bundled-extension-manifest.ts";
 import { sparkleBuildFloorsFromShortVersion, type SparkleBuildFloors } from "./sparkle-build.ts";
 
+export { collectBundledExtensionManifestErrors } from "./lib/bundled-extension-manifest.ts";
+
 type PackFile = { path: string };
 type PackResult = { files?: PackFile[] };
-type PackageJson = {
-  name?: string;
-  version?: string;
-  dependencies?: Record<string, string>;
-  optionalDependencies?: Record<string, string>;
-  openclaw?: {
-    install?: {
-      npmSpec?: string;
-    };
-    releaseChecks?: {
-      rootDependencyMirrorAllowlist?: string[];
-    };
-  };
-};
-type BundledExtension = { id: string; packageJson: PackageJson };
-type BundledExtensionMetadata = BundledExtension & {
-  npmSpec?: string;
-  rootDependencyMirrorAllowlist: string[];
-};
 
 const requiredPathGroups = [
   ["dist/index.js", "dist/index.mjs"],
@@ -175,55 +164,6 @@ export function collectBundledExtensionRootDependencyGapErrors(params: {
   return errors;
 }
 
-function normalizeBundledExtensionMetadata(
-  extensions: BundledExtension[],
-): BundledExtensionMetadata[] {
-  return extensions.map((extension) => ({
-    ...extension,
-    npmSpec:
-      typeof extension.packageJson.openclaw?.install?.npmSpec === "string"
-        ? extension.packageJson.openclaw.install.npmSpec.trim()
-        : undefined,
-    rootDependencyMirrorAllowlist:
-      extension.packageJson.openclaw?.releaseChecks?.rootDependencyMirrorAllowlist?.filter(
-        (entry): entry is string => typeof entry === "string" && entry.trim().length > 0,
-      ) ?? [],
-  }));
-}
-
-export function collectBundledExtensionManifestErrors(extensions: BundledExtension[]): string[] {
-  const errors: string[] = [];
-  for (const extension of extensions) {
-    const install = extension.packageJson.openclaw?.install;
-    if (
-      install &&
-      (!install.npmSpec || typeof install.npmSpec !== "string" || !install.npmSpec.trim())
-    ) {
-      errors.push(
-        `bundled extension '${extension.id}' manifest invalid | openclaw.install.npmSpec must be a non-empty string`,
-      );
-    }
-
-    const allowlist = extension.packageJson.openclaw?.releaseChecks?.rootDependencyMirrorAllowlist;
-    if (allowlist === undefined) {
-      continue;
-    }
-    if (!Array.isArray(allowlist)) {
-      errors.push(
-        `bundled extension '${extension.id}' manifest invalid | openclaw.releaseChecks.rootDependencyMirrorAllowlist must be an array of non-empty strings`,
-      );
-      continue;
-    }
-    const invalidEntries = allowlist.filter((entry) => typeof entry !== "string" || !entry.trim());
-    if (invalidEntries.length > 0) {
-      errors.push(
-        `bundled extension '${extension.id}' manifest invalid | openclaw.releaseChecks.rootDependencyMirrorAllowlist must contain only non-empty strings`,
-      );
-    }
-  }
-  return errors;
-}
-
 function collectBundledExtensions(): BundledExtension[] {
   const extensionsDir = resolve("extensions");
   const entries = readdirSync(extensionsDir, { withFileTypes: true }).filter((entry) =>