VectorCraft
An open-source, clean-room reimplementation of Adobe Illustrator
...It provides tools such as Pen, Direct Selection, Pathfinder, Smart Guides, layers, swatches, blends, gradient meshes, repeats, and envelope distortion. Exact curve booleans and structural-sharing undo are designed for reliable editing. Its native format is JSON-based, while SVG, PDF-compatible AI, PNG, JPEG, WebP, and other formats are supported for interchange. The same codebase runs on macOS, Windows, Linux, FreeBSD, and WebAssembly. A JSON control channel and MCP server expose editing commands to AI agents for automated drawing and export workflows.