/**
 * A persistent, game-owned HUD layer for player-compute CLIENT mods. A
 * running client mod never touches the game DOM; it emits `hud_set` payloads
 * that the broker forwards here. This layer lives outside the studio panel so
 * a mod's HUD survives panel re-renders and keeps rendering after the coding
 * panel closes.
 *
 * The payload is untrusted mod output: it is rendered as text/simple
 * structured values only, never as HTML, so a mod cannot inject markup.
 */
export interface CrowdyStudioHudEntry {
    /** Stable source key (module name or listing id) so each mod owns one slot. */
    source: string;
    label: string;
    payload: unknown;
}
export declare class CrowdyStudioTextHud {
    private root;
    private readonly entries;
    private readonly previews;
    private ensureRoot;
    /** Upsert the HUD slot for one mod source and re-render it. */
    set(entry: CrowdyStudioHudEntry): void;
    /** Remove a mod's HUD slot (on uninstall / stop / circuit trip). */
    remove(source: string): void;
    clear(): void;
    /**
     * Mirror one source into a game-owned studio preview. The same text-only
     * renderer is used for the persistent HUD and preview, so untrusted
     * payloads never become arbitrary overlay DOM.
     */
    mountPreview(container: HTMLElement, source: string): () => void;
    destroy(): void;
    private render;
    private renderPreview;
    private entryCard;
    /** Render an untrusted payload as safe text (compact, bounded). */
    private describe;
}
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