there is an official python LSP library from microsoft

[llllvvuu]

microsoft/lsprotocol (lsprotocol on pip) can be used in order to not have to maintain type definitions like these.

Also, there is pygls which is decently adopted and takes care of other boilerplate such as transport (tcp/stdio/ws), caching, document state, and lifecycle events.

If it ain't broke don't fix it but I thought I'd offer the tip anyway in case it comes in handy later (I was able to make a - granted much simpler - LSP in <120 LOC with this).

[hacker-DOM]

Nice!