Worked on enhancing the TypeScript linter within the oxc-project/oxc repository, focusing on improving linting accuracy for complex TypeScript types. Addressed a bug that caused false positives when circular references appeared in indexed object styles by implementing circular reference detection and refining diagnostic logic. This adjustment reduced incorrect lint warnings, resulting in cleaner and more actionable output for developers working with advanced TypeScript patterns. The solution was delivered as a focused Rust commit, leveraging expertise in both Rust and TypeScript as well as linter development. The work contributed to a more reliable linting experience and improved developer productivity for the project.