/**
 * User-directed Crowdy Studio layout state: which panes are visible and how
 * large they are. The editor is the only always-visible surface; the explorer,
 * project settings, agent dock, and bottom panel are toggled by the person
 * using the Studio and their choices persist locally.
 */
export type StudioPaneId = 'explorer' | 'settings' | 'agent' | 'bottom';
export interface StudioPaneSizeRange {
    readonly min: number;
    readonly max: number;
}
export interface StudioLayoutState {
    readonly visible: Readonly<Record<StudioPaneId, boolean>>;
    /** Pixel widths for side panes; pixel height for the bottom panel. */
    readonly sizes: Readonly<Record<StudioPaneId, number>>;
}
export type StudioLayoutListener = (state: StudioLayoutState) => void;
export type StudioLayoutStorage = Pick<Storage, 'getItem' | 'setItem'>;
export interface StudioLayoutControllerOptions {
    storage?: StudioLayoutStorage | null;
    storageKey?: string;
    defaults?: Partial<StudioLayoutState>;
}
export declare const STUDIO_LAYOUT_STORAGE_KEY = "ck:crowdy-studio:layout:v1";
export declare const STUDIO_PANE_IDS: readonly StudioPaneId[];
export declare function studioPaneSizeRange(pane: StudioPaneId): StudioPaneSizeRange;
export declare function clampStudioPaneSize(pane: StudioPaneId, size: number): number;
/**
 * Headless layout state machine. DOM shells subscribe and translate the state
 * into CSS variables / hidden attributes; tests drive it directly.
 */
export declare class StudioLayoutController {
    private readonly storage;
    private readonly storageKey;
    private readonly listeners;
    private visible;
    private sizes;
    constructor(options?: StudioLayoutControllerOptions);
    getState(): StudioLayoutState;
    isVisible(pane: StudioPaneId): boolean;
    paneSize(pane: StudioPaneId): number;
    subscribe(listener: StudioLayoutListener): () => void;
    setVisible(pane: StudioPaneId, visible: boolean): void;
    toggle(pane: StudioPaneId): void;
    setSize(pane: StudioPaneId, size: number, persist?: boolean): void;
    private emit;
    private loadPersisted;
    private persist;
}
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