This explains how to properly configure LSP Rust features in Emacs and introduces an interactive tool for managing them. Glossary rust-analyzer: The LSP server for Rust that provides IDE-like features in editors. Cargo features: Conditional compilation flags in Rust projects defined in Cargo.toml. LSP: Language Server Protocol, providing language intelligence to editors. .dir-locals.el: Emacs mechanism for setting directory-local variables. The wrong way and the right way In my previous post ...| Arthur's blog