feat(release): sync skill detail tabs and publish 1.2.1

Package optional TUTORIAL/DEMO/CHANGELOG into skill ZIPs and sync tutorial_md, demo_md, demo_video_url, and versioned changelog to the marketplace API.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_release_workflow.py

@@ -39,9 +39,23 @@ def test_workflow_packages_readme_at_root(workflow_text: str) -> None:
 
 
 def test_workflow_metadata_reads_root_readme(workflow_text: str) -> None:
-    assert "readme_path = 'README.md'" in workflow_text
-    assert "frontmatter.load(readme_path)" in workflow_text
-    assert "metadata['readme_md'] = body" in workflow_text
+    assert 'load_md("README.md")' in workflow_text
+    assert 'metadata["readme_md"] = body' in workflow_text
+
+
+def test_workflow_packages_market_docs_when_present(workflow_text: str) -> None:
+    assert 'for market_doc in ("TUTORIAL.md", "DEMO.md", "CHANGELOG.md"):' in workflow_text
+    assert "Copied {market_doc}" in workflow_text
+
+
+def test_workflow_metadata_syncs_tutorial_demo_changelog(workflow_text: str) -> None:
+    assert 'load_md("TUTORIAL.md")' in workflow_text
+    assert 'metadata["tutorial_md"] = tutorial_body' in workflow_text
+    assert 'load_md("DEMO.md")' in workflow_text
+    assert 'metadata["demo_md"] = demo_body' in workflow_text
+    assert 'metadata["demo_video_url"]' in workflow_text
+    assert "extract_changelog_for_version" in workflow_text
+    assert 'metadata["changelog"] = section' in workflow_text
 
 
 def test_workflow_does_not_use_references_readme_for_marketplace(