Topic Breakdown is an open-source tool designed to simplify the process of learning complex topics by visually breaking them down into manageable subtopics. Inspired by the challenges of staying organized while using AI tools like ChatGPT or Claude, Topic Breakdown offers a graph-based interface that allows users to recursively explore and track their learning journey. Key features include the ability to hide explored paths to reduce clutter and localized chats that keep discussions focused on specific subtopics for better organization and deeper analysis. Ideal for learners tackling new technologies or intricate fields, this tool helps users stay organized, track progress, and build understanding from first principles.