Worked on the open-telemetry/opentelemetry-cpp repository, focusing on improving the correctness and reliability of histogram aggregation within the OpenTelemetry C++ SDK. Addressed a critical off-by-one error in the downscaling logic of the Base2ExponentialHistogramAggregation::Merge() function, which previously led to inaccurate bucket counts during metric aggregation. This fix ensures that dashboards and analytics relying on histogram data now receive accurate and reliable metrics, reducing the risk of misleading insights. The work involved C++ development, algorithm design, and unit testing, with careful attention to traceable commit practices and collaborative workflows using Git to maintain transparency and reproducibility of changes.