In May 2025, Dan focused on backend development and schema definition for the lastmile-ai/mcp-agent repository, addressing a critical bug in the parallel workflow schema validation. He corrected the placement of the 'required' key within the schema, ensuring that parameter validation for parallel workflows is enforced and reducing the risk of misconfiguration. Using Python, Dan implemented a robust validation path that minimizes runtime errors when composing parallel steps, directly improving deployment reliability. His work demonstrated careful attention to risk management and traceability, delivering a targeted patch that resolved issue #188 while maintaining the stability and integrity of the existing codebase.