Worked on stabilizing and maintaining the neos/Neos.NeosIo and neos/flow-development-collection repositories, focusing on dependency management and code quality. Addressed platform stability by removing deprecated sitegeist/silhouettes dependencies, migrating configurations to Neos core property presets, and updating YAML and Composer files for improved compatibility and security. Enhanced maintainability by refining code style in PHP files, specifically resolving linter warnings in Cookie.php to align with static analysis standards. Prioritized repository hygiene and documentation to support future development and onboarding. Utilized PHP, YAML, and Composer, emphasizing clean, CI-friendly codebases and reducing technical debt to enable smoother deployments and long-term project sustainability.