Worked on enhancing API reliability for the go-gitea/gitea repository, focusing on cross-repository pull request workflows and error handling. Addressed a recurring 500 error in the PR compare API by ensuring commits are resolved within the correct repository context, particularly for fork scenarios. Improved the PR commits API to gracefully handle cases where the base branch is missing, reducing user-facing errors and supporting more accurate cross-repo analysis. Utilized Go for backend development, emphasizing robust error handling and thorough testing. Collaborated closely with other contributors, maintaining clear traceability through co-authored commits and explicit issue linkage to drive stability improvements.