OpenPencil – AI-native open-source vector design tool with code-based workflows

Summary: OpenPencil is an MIT-licensed vector design tool built for AI Agents to edit designs programmatically via a built-in MCP server. Its Design-as-Code architecture stores files as JSON, enabling version control and Git diffs for design collaboration.

What it does

OpenPencil allows AI Agents like Claude or Cursor to directly modify design files without a graphical interface. Designs are saved in a structured JSON format (.op), supporting code-style workflows such as commits and pull requests.

Who it's for

It targets designers and developers who want to integrate AI-driven automation into vector design and manage designs through code-based version control.

Why it matters

It eliminates manual GUI edits by enabling AI-powered, code-centric design updates, streamlining collaboration and reducing reliance on traditional design tools.