A launcher where every palette is an extension.

One API, in TypeScript

An extension is a directory with a pal.json and an index.ts. A palette answers list() with rows and pick() with an effect: copy, paste, open, a toast, a form, a deeper level, a view. The panel draws the list, the grid, the detail pane and the view; the extension never touches a pixel. A game is the one exception: it may bring its own page, run in a sandboxed frame inside the panel, as Snake II, Solitaire and Blackjack do.

• A list with a detail paneFiles: rows from list(), the pane from detail(): markdown and metadata.
• A gridEmoji: the same rows with view: "grid"; sections, filters and search come with it.
• A view of its own2048: a tree of stacks, text, tiles and keys from view(); the panel draws and animates it.

import { defineExtension, settings, type Item } from "@zcag/pal";

export default defineExtension({
  palettes: {
    hello: {
      title: "Hello",          // the section label at the root; the manifest's tile is its icon
      list: (): Item[] => [    // rows; indexed unless `input: true`
        { id: "greet", name: "Hello, world", subtitle: "a row", icon: "👋", actions: [{ id: "copy", title: "Copy" }] },
      ],
      pick: (id, action) => ({ copy: "Hello, world" }),  // an Effect
    },
  },
});

pal install . copies the directory into the store and the host loads it; type hello in the panel. pal install github:user/repo takes anyone's. How extensions work, and the store, where every extension's page has its install line and its source.