Offsider docs

Offsider puts small HTML apps in native Mac windows beside your work. An AI agent or terminal command opens a panel, sends it data, and listens for events. Each panel declares the tools it can run.

Get started

Install Offsider, then create your first panel:

offsider init my-checklist
offsider open my-checklist --input '{"items":["Try Offsider"]}'

Keep the opening terminal running. In another terminal, try offsider list, then offsider close my-checklist.

Build a panel

• Panel overview and commands
• The manifest: panel.json
• The JavaScript API
• Tools and live data
• Headers and backgrounds
• The sandbox

Use it with your agent

Read AI agent workflows for opening panels, handling events, and connecting tools.

The panel reference also ships with the Mac app. Run offsider docs to read it in your terminal.