OpenFlowKit is a diagram engine designed specifically for builders who create complex systems. It serves as an open-source, fully-customizable diagram creator that eliminates the chore of manual diagram creation while maintaining professional aesthetics.

The tool offers first-class support for Mermaid.js and a type-safe DSL for defining architecture in code. It features Flowpilot AI for conversational diagram editing, fully customizable nodes and edges powered by React Flow, and local-first operation with no cloud saves or tracking. The platform provides one-click auto-layout, export capabilities to SVG, PNG, PDF, and JSON formats, and seamless Figma integration with editable vector layers.

OpenFlowKit operates as a local-first application where everything stays on your machine without requiring cloud synchronization. The engine handles layout automatically whether you write code or use drag-and-drop interfaces, providing instant live previews of changes.

The benefits include creating diagrams that don't look generic, maintaining documentation that doesn't drift from reality, and avoiding pixel-perfect alignment struggles. Use cases span engineering workflows with diagram-as-code approaches, design workflows with Figma integration, and export/sharing workflows for documentation.

The product targets engineers, architects, and product teams building complex systems. It integrates natively with existing workflows including code editors, version control systems, and design tools like Figma. The technology stack includes React Flow for the diagram engine and supports TypeScript for the DSL.