Worked on the BerriAI/litellm repository to address a routing issue affecting latency measurement accuracy. Focused on backend development using Python, the developer fixed a bug in the lowest_latency routing strategy by correcting the logic that trims latency data, ensuring the oldest entry is discarded when the window reaches its maximum size. This adjustment allows routing decisions to consistently reflect the most current latency information. Expanded regression testing across both synchronous and asynchronous code paths, including TTFT and event logging flows, to verify that timeout penalties and data freshness are maintained. Emphasized asynchronous programming and robust test coverage throughout the process.