During June 2025, Wei-Cheng Lin developed a type-safe array schema construction API for the MichaelCade/mcp-go repository, focusing on improving schema definition clarity and safety. He introduced helper functions in Go that allow developers to define array item schemas for strings, numbers, and booleans, including support for string enums. This approach streamlines the process of building complex schemas, reduces potential runtime errors, and enhances maintainability. Wei-Cheng ensured backward compatibility by implementing comprehensive tests and maintaining focused commits. His work leveraged skills in API design, schema definition, and testing, resulting in a cleaner, more robust API for array schema construction.