Worked on enhancing Rust tooling by improving the remove_parentheses assist in the rust-lang/rust repository, focusing on return-expression awareness to ensure parentheses are only removed when syntactically safe. Applied code analysis and syntax tree manipulation techniques in Rust to expand test coverage for return-like expressions, reducing the risk of regressions. Additionally, addressed a bug in rust-lang/rust-analyzer to handle parentheses removal safely around return statements and logical operators, preventing syntax errors in generated code. This work improved the reliability and safety of automated code edits across Rust projects, demonstrating a methodical approach to test-driven development and cross-repository consistency.