Patched build for the VS Code 1.121+ front-matter regression (issue #81): metaData.split is not a function, which broke the markdown language service (folding, document symbols, links, code actions) on any document with front matter.
The fix normalizes both the old (<=1.120, string) and new (>=1.121, { content } object) front-matter shapes and fails safe otherwise. Merged in #82.
For maintainers: download adobe-markdown-authoring-2.1.5.vsix below and upload it to the AdobeExl Marketplace listing.