Ronan Synnott updated the Arm Zena CSS Debugging Process Documentation and Configuration Alignment in the madeline-underwood/arm-learning-paths repository, focusing on compatibility with software stack version 2.1. He revised symbol file paths and introduced new debugging tips to streamline troubleshooting and support future stack upgrades. Working primarily with Markdown, Ronan applied his skills in debugging, documentation, and software development to enhance the clarity and maintainability of the documentation. Although no major bugs were fixed during this period, his work improved onboarding efficiency and team velocity by ensuring the documentation remained current and actionable for both new and existing developers.