I got tired of AI diagram slop, so I built an open-source AI diagram generator on Excalidraw

Developer Agasta has launched OpenDiagram, an open-source tool designed to solve the common frustrations associated with AI-generated architecture diagrams. While many LLMs struggle to produce clean, readable Mermaid code, OpenDiagram takes a different approach by separating the AI's logic from the visual rendering. The AI generates a semantic specification of the system components, which is then processed by the Eclipse Layout Kernel (ELK) and a custom router to create professional, well-organized diagrams. The final output is rendered as native, editable Excalidraw elements, allowing users to easily modify layouts or add details. The tool supports various diagram types, including cloud architecture, sequence, and ER diagrams, and features a chat-based interface for iterative updates. OpenDiagram is currently in a free beta phase and is available for self-hosting, aiming to provide a more reliable, high-quality alternative to existing AI diagramming solutions.