ProWiki announced "Native Markdown", their new extension

MediaWiki extension that makes Markdown a native content model. The content model determines the format in which MediaWiki stores and renders a page. So a Markdown page is not wikitext with some Markdown embedded inside of it. The whole page is Markdown, stored exactly as you typed it, and rendered as a real wiki page with working links, categories, templates, parser functions, a table of contents, and full-text search.

Though I have not tried this extension yet. This content model approach seems to be very Mediawiki-native and good.

Please note that the official announcement described it as a bridge to the AI agents. ProWiki is also developing and maintaining MediaWiki MCP.