panel.json

A panel folder can hold a panel.json next to its index.html. Every key is optional.

{
  "title": "Review",
  "icon": "icon.png",
  "width": 400,
  "height": 700,
  "entry": "index.html",
  "titlebar": "overlay",
  "background": "none",
  "keepOnTop": false,
  "csp": {
    "resourceDomains": ["https://avatars.githubusercontent.com"],
    "connectDomains": []
  },
  "tools": {
    "prs": {
      "command": ["./tools/prs"],
      "description": "State and CI for a list of pull requests",
      "timeout": 30
    }
  }
}

Key	Default	What it does
title	the panel’s name	The window’s title.
icon	a generic panel symbol	A PNG or other image in the panel folder, shown beside its name in Offsider’s panel list and on its minimized Dock tile.
width, height	380, 560	The size it first opens at. After that, Offsider remembers where you put it and how big you made it, per panel name.
entry	index.html	The page to load.
titlebar	standard	overlay runs the page up behind the close button, for a header that fills the top of the window. See Behind the titlebar.
background	vibrant	vibrant puts the frosted window material behind a transparent page. none leaves the page to paint its own.
keepOnTop	false	Set true to keep the window above other apps and on every Space, with only a close button. The default is an ordinary window with all three window buttons. The old floating key is still accepted.
csp	nothing	Origins the app may load images, scripts, styles and fonts from (resourceDomains), or fetch (connectDomains).
tools	none	Commands the app may run. See Tools.
capabilities	none	Native access: foundationModels and notifications, each a boolean. Both require approval.