Continuation of https://spectrum.chat/?t=16557712-7029-4718-a2bc-38453fdfb928 and https://github.com/unifiedjs/governance/issues/11
@aecepoglu is offering to contribute retext-language-server.
https://github.com/unifiedjs/governance/blob/master/governance-grant.md

I think it could be a good fit for the organization, and a good starting point for additional language servers for other unified projects.
Thoughts @retextjs/core?