During April 2025, Mateusz Bieniek developed the Archived Content Grace Period feature for the ibexa/core repository, addressing reliability issues during content archiving workflows. He implemented a configurable grace window in PHP, updating the persistence layer to ensure content remains accessible when updated mid-request, thereby reducing the risk of 500 errors. His work involved backend development, API design, and database interaction, with a focus on integration testing to validate the new behavior across realistic scenarios. Mateusz also prepared configuration options and documentation scaffolding, demonstrating a thorough approach to maintainability and safe rollout. The work reflects depth in both design and testing.