Akhil Sharma focused on improving API stability in the PyBaMM repository by introducing a structured deprecation path for private APIs. He addressed a bug where set_parameters and set_up_and_parameterise_experiment were made private without warning, which risked breaking downstream code. Using Python, Akhil implemented deprecation warnings to guide users toward updated methods while preserving backward compatibility for existing callers. His work involved careful code refactoring and clear documentation to reduce migration risk and support future API evolution. Over the month, Akhil’s contributions demonstrated depth in deprecation handling and bug fixing, ensuring a smoother transition for developers relying on PyBaMM’s internal APIs.