During June 2025, Lula Fun developed a standardized tool output pipeline for the cloudwego/eino repository, focusing on improving reliability and downstream parsing. Lula introduced the marshalString utility in Go to handle JSON marshaling of tool outputs, then refactored core files such as invokable_func.go and streamable_func.go to integrate this new approach. By standardizing the output format, Lula enabled smoother CI/CD integrations and enhanced observability for user-facing tooling. The work emphasized code maintainability and testability, leveraging Go, JSON marshaling, and unit testing. Lula’s contributions addressed the need for consistent tool output, providing a foundation for more robust automation and integration.