During September 2025, this developer contributed to the oxc-project/oxc repository by designing and implementing a new linting rule aimed at improving error handling practices. Leveraging skills in JavaScript, Rust, and AST manipulation, they introduced the preserve-caught-error rule, which enforces the preservation of original errors when re-throwing exceptions by utilizing the 'cause' property. This addition enhances error traceability and debugging efficiency across the codebase. The developer updated relevant tests and snapshots to ensure the rule’s correctness and maintainability, aligning their work with broader repository quality initiatives. Their focused contribution addressed a nuanced aspect of error propagation and observability.