What I Built DiagramFlowAI is a local-first desktop application (macOS, Windows, and Linux) that transforms natural language descriptions into production-ready architecture diagrams. It intelligently generates standard Mermaid syntax for general workflows, or outputs structured commands mapping to official AWS icons for cloud architectures. The application solves a very specific tension in modern software engineering: privacy versus productivity . When architects and engineers sketch out internal systems—such as authentication flows, proprietary data pipelines, or secure cloud perimeters—sending that data to a cloud-based LLM endpoint is often a compliance deal-breaker. DiagramFlowAI is designed to be completely self-contained. Powered by flutter_gemma and LiteRT, it runs 100% locally. After the initial model download, it requires zero internet connection, uses no API keys, and has no telemetry. It’s an AI diagramming studio that respects your company’s security posture.…