OpenPencil

OpenPencil provides a CLI and MCP server for .fig design files and the running OpenPencil editor.

Use two modes:

• App mode — connect to the running OpenPencil editor by omitting the file argument.
• Headless mode — work with .fig files directly by passing a file path.

# App mode — operates on the document open in the editor
openpencil tree

# Headless mode — operates on a .fig file
openpencil tree design.fig

Current reference version: OpenPencil 0.12.x. The MCP server exposes 106 tools in 0.12.0.