/**
 * What kind of surface an app presents, which decides what can be demanded of it.
 *
 * This is deliberately NOT the list of shells. "Which shell is this" -- a browser, Electron, Tauri --
 * is a question about what somebody is using, and it belongs to the usage contract. "What kind of
 * surface is this" is a question about what can be observed, and it is the one verification needs.
 *
 * Electron and Tauri are two different products and one kind of surface: a web page inside a native
 * window. Code that branched on the shell had to name both, and would have to name a third that
 * behaved identically. Code that branches on the surface names `webview` once.
 *
 * There are no dependencies here on purpose. A third-party implementation says which of these it is
 * and needs nothing from this package to say it.
 *
 * Absent on the wire means `web`. That is the back-compat convention used throughout the handshake:
 * a field nobody sent means what everything meant before the field existed.
 */
export declare const PlatformProfile: {
    /** A browser document. The page owns the window. */
    readonly WEB: "web";
    /**
     * A web page inside something else's window: Electron's renderer, Tauri, Capacitor, a React
     * Native WebView. It renders like the web and the window around it is not ours.
     */
    readonly WEBVIEW: "webview";
    /**
     * A native view tree -- iOS, Android, Flutter. There are elements and they are not DOM nodes, so
     * anything that assumes a document is wrong here.
     */
    readonly NATIVE: "native";
    /**
     * No rendering surface at all: a job, a worker, an API. It can still be observed and it can still
     * be asserted about; it just cannot be looked at or photographed.
     */
    readonly SERVICE: "service";
};
export type PlatformProfile = (typeof PlatformProfile)[keyof typeof PlatformProfile];