Rather than starting from scratch, would it make more sense to make an ActivityPub plugin for the open-source MediaWiki software Wikipedia runs on? MediaWiki already has some “interwiki” functionality that such a plugin could expand on, and you’d have the advantage of being able to fork content from WP and other MW projects without having to re-format it. Plus you’d be able to leverage other MW plugins—Semantic MediaWiki in particular could add a lot of useful functionality to federated wikis, like articles that could query and aggregate information from other federated articles rather than just linking to the text.

For the love of god fix ur mobile css