Codebook is a spell checker for code. It binds together the venerable
Tree Sitter and the fast spell checker Spellbook. Included is a
Language Server for use in (theoretically) any editor. Everything
is done in Rust to keep response times snappy and memory usage low.

However, if you are looking for a traditional spell checker for
prose, Codebook may not be what you are looking for. For example,
capitalization issues are handled loosely and grammar checking is
out of scope.