Worked on the PostHog/posthog-python repository to address a critical issue affecting feature flag reliability. Focused on backend development and feature flagging, the work involved refining the evaluation logic by removing unnecessary sorting of condition sets with variant overrides. This adjustment ensured that the original evaluation order was preserved, preventing unintended variant assignments and improving the predictability of feature flag behavior for downstream users. Implemented in Python, the change was carefully scoped to the sorting logic and supported by targeted test coverage, maintaining backward compatibility while reducing support incidents and enhancing trust for customers relying on the Python client’s feature flag semantics.