Self-hosted draw.io diagram editor extension for piclaw.

Install

Open Settings → Add-Ons and install drawio-editor from the catalog.

What it does

• Registers an HTTP route at /drawio/* serving the draw.io webapp in embed mode
• Provides the open_drawio_editor tool for the agent
• Diagrams stored as .drawio XML files in the workspace
• Supports PNG/SVG export

Vendor files

The draw.io webapp (~44MB) is not included in this addon package. It must be vendored separately:

1. Download from jgraph/drawio releases
2. Extract to vendor/ directory inside this addon's install path
3. Or symlink from an existing piclaw install

Architecture

Uses piclaw's globalThis.__piclaw_registerRoute to serve the draw.io webapp. A wrapper page (/drawio/edit.html) embeds the editor in an iframe and handles the postMessage protocol for load/save via the piclaw raw file API.