diff --git a/.github/workflows/update-quick-start-module.yml b/.github/workflows/update-quick-start-module.yml
index 08d14037f465..0271b839f730 100644
--- a/.github/workflows/update-quick-start-module.yml
+++ b/.github/workflows/update-quick-start-module.yml
@@ -119,14 +119,32 @@ jobs:
     environment: pytorchbot-env
     steps:
       - name: Checkout pytorch.github.io
-        uses: actions/checkout@v2
+        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           python-version: 3.9
           architecture: x64
-      - name: Generate quick-start-additional-platforms.js
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install markdown pygments
+      - name: Generate additional-platforms assets
         shell: bash
         run: |
           set -ex
           python3 ./scripts/gen_additional_platforms.py
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@22a9089034f40e5a961c8808d113e2c98fb63676 # v7
+        with:
+          token: ${{ secrets.PYTORCHBOT_TOKEN }}
+          commit-message: Regenerate additional-platforms assets
+          title: '[Additional Platforms] Regenerate quick-start-additional-platforms.js and additional-platforms.json'
+          body: >
+            This PR is auto-generated. It regenerates the third-party vendor
+            accelerator picker assets after a change to _additional_platforms/*.json
+            or _get_started/additional_platforms/*.md.
+          labels: automated pr
+          add-paths: |
+            assets/quick-start-additional-platforms.js
+            assets/additional-platforms.json
diff --git a/scripts/gen_additional_platforms.py b/scripts/gen_additional_platforms.py
index 8fffa1980674..9c0dc4cb4635 100644
--- a/scripts/gen_additional_platforms.py
+++ b/scripts/gen_additional_platforms.py
@@ -19,12 +19,15 @@
 5. Output the result to assets/quick-start-additional-platforms.js
 """
 
+import datetime
 import json
+import os
+import re
 from pathlib import Path
 from typing import Dict, Any, Set, List
+
 import markdown
 from markdown.extensions.codehilite import CodeHiliteExtension
-import re
 
 BASE_DIR = Path(__file__).parent.parent
 ADDITIONAL_PLATFORM_DIR = BASE_DIR / "_additional_platforms"
@@ -32,6 +35,12 @@
 INCLUDES_DIR = BASE_DIR / "_includes"
 ASSETS_DIR = BASE_DIR / "assets"
 
+# External consumer JSON bundle
+# Bump SCHEMA_VERSION on any breaking change
+# to the `platforms` / `html` shape.
+SCHEMA_VERSION = 1
+JSON_OUT_PATH = "additional-platforms.json"
+
 # Schema definitions derived from additional_platforms.md
 REQUIRED_TOP_LEVEL_FIELDS: Set[str] = {"name", "support_channel", "stable"}
 ALLOWED_TOP_LEVEL_FIELDS: Set[str] = {"name", "support_channel", "stable", "preview"}
@@ -231,6 +240,22 @@ def write_output(content: str) -> None:
     print(f"Generated: {output_path}")
 
 
+def write_platforms_json(platforms: dict, html: dict, out_path: str) -> None:
+    """
+    Write JSON bundle for external consumers.
+    """
+    payload = {
+        "schema_version":    SCHEMA_VERSION,
+        "generated_at":      datetime.datetime.now(datetime.timezone.utc).isoformat(timespec="seconds"),
+        "generator_commit":  os.environ.get("GITHUB_SHA", "")[:7],
+        "platforms":         platforms,
+        "html":              html,
+    }
+    with open(out_path, "w", encoding="utf-8") as f:
+        json.dump(payload, f, indent=2, ensure_ascii=False, sort_keys=False)
+    print(f"Wrote {out_path}")
+
+
 def main():
     """Main entry point."""
     
@@ -254,6 +279,9 @@ def main():
     # Write to assets directory
     write_output(js_content)
 
+    # Also write the JSON file for the external consumer
+    write_platforms_json(platform_data, markdown_content, str(BASE_DIR / JSON_OUT_PATH))
+
 
 if __name__ == "__main__":
     main()