Worked on backend enhancements and bug fixes across agno-agi/agno and huggingface/trl repositories, focusing on Python development, API integration, and data modeling. Developed a feature for agno-agi/agno that expanded the OpenAI Responses API to track granular token usage by parsing response_usage and recording cache_read_tokens and reasoning_tokens in the Metrics model, improving observability and cost control. In huggingface/trl, addressed a runtime type error in LogCompletionsCallback by refining type hints to allow None values for optional parameters, enhancing code readability and maintainability. Emphasized type safety and clear error messaging, contributing to more robust and developer-friendly backend systems.