Worked on enhancing deserialization error reporting within the Symfony framework, focusing on the http-kernel and serializer repositories. Leveraged PHP and backend development skills to introduce mechanisms that collect additional errors related to non-normalizable values and provide full deserialization path visibility. Implemented a new denormalization option in symfony/serializer to gather extra attribute errors and refactored the process for clearer error feedback. These improvements streamlined debugging and increased the robustness of payload processing by offering developers more detailed validation messages. The work emphasized error handling best practices, resulting in more transparent and efficient resolution of deserialization issues across Symfony components.