Charlie Smith enhanced privacy-aware code completion for Rust developers by implementing conditional visibility of private items in both the rust-lang/rust and rust-lang/rust-analyzer repositories. Using Rust and leveraging expertise in compiler internals and IDE development, Charlie introduced logic that respects the 'private editable' setting, ensuring private imports are only suggested when appropriate. This approach reduced irrelevant suggestions and improved the consistency of code completion across core Rust tooling. The work demonstrated a thoughtful alignment between user preferences and tool behavior, resulting in a more focused and productive developer experience. All changes were documented with traceable commits to support maintainability.