Worked on stabilizing the tagging API within the neos/neos-development-collection repository, focusing on backend development using PHP. Addressed a key bug in the SubtreeTags::with() method by refining its handling of variadic arguments, enabling the reliable addition of multiple subtree tags in a single call. This technical improvement enhanced tagging usability and reduced the likelihood of downstream tagging errors across the codebase. The solution was validated to ensure compatibility with existing workflows and API usage, demonstrating careful attention to integration and system stability. The work emphasized robust bug resolution and thoughtful validation practices within a PHP backend environment over the month.