I suggest it would be helpful if the README's intro expanded a little more on the project's scope. "for postgres" is a bit vague, and "focusing on developer experience and reliable SQL tooling." doesn't tell me much about what it actually does.

If I was coming to this project for the first time I think the questions I'd immediately like the answers to are:

- What language is this language server for? Is it just for SQL proper, or for PL/pgSQL, or writing C extensions, or what?

- What makes it PostgreSQL-specific? Is it just that it follows PostgreSQL's dialect of SQL?

- Does it expect to be told about your database's schema? And if so, do you tell it by giving it a database connection, or letting it see files defining the schema, or what?