Worked on the LianjiaTech/bella-openapi repository to deliver a targeted backend improvement focused on protocol handling and API integration. Addressed a critical bug affecting Claude Tool Protocol transfers by refining the logic that converts tool use blocks into the AWS Bedrock runtime format. This involved ensuring that tool call identifiers, names, and arguments were accurately translated, which improved the reliability and stability of tool interactions during completion processes. The work was implemented in Java, emphasizing robust error handling and consistent protocol translation. Maintained code quality and traceability through focused commits, contributing to the overall resilience of backend tool workflows.