The development planning session for Netlify CMS, an open source content management system for static site generators, was a bi-weekly public event where the project team discussed progress and upcoming plans. The latest sprint focused on releasing version 0.5.0, which included significant improvements to the markdown editor built using Slate and Unified, and upgraded slug handling based on URI/IRI spec research. Additionally, Git Gateway support was added to enable email/password login and user management for non-technical teams or those without GitHub accounts. For the next sprint, top priorities include completing Sprint 2 work, releasing version 0.6.0 with dependency upgrades and bugfixes, implementing global navigation and the Collections UI, and addressing several open issues on the project board. The team is seeking contributions from new contributors, particularly for Hacktoberfest projects.