Has anyone experience in implementing a language server? I am currently working on a php language server and can’t wrap my head around how to efficiently find the correct scope/token from a cursor position ... like I would need to jump right into the middle of the AST somehow.

On another note I already fought the borough checker for 3 hours straight so might just go and read how the rust language server was implemented.

But I would still like to pull some experience from you if you have been through this already