January 2025 delivered API consistency, maintainability, and code hygiene improvements across Symfony components. Scope covered two repositories: symfony/symfony (feature) and symfony/serializer (bug fix). Key outcomes include: (1) refactor to standardize the first parameter name of normalize from $object to $data across normalizer implementations in the Symfony Serializer ecosystem, (2) API compatibility fix aligning all normalize implementations with NormalizerInterface by updating the parameter name from 'object' to 'data' and refining internal logic, along with minor test renames and docblock cleanups. These changes reduce cross-component risk, improve readability, and simplify contributor onboarding, delivering measurable business value through easier maintenance and more predictable behavior across the stack.