import type React from 'react';
/** Terminal widths below this hide the sidebar entirely. */
export declare const SIDEBAR_MIN_TERMINAL = 64;
/** Smallest sidebar width (in columns) when visible. */
export declare const SIDEBAR_MIN_WIDTH = 20;
/** Largest sidebar width (in columns). */
export declare const SIDEBAR_MAX_WIDTH = 48;
/** Fraction of terminal width to allocate to the sidebar. */
export declare const SIDEBAR_FRACTION = 0.25;
/** Border (2) plus horizontal padding (2) consumed by RightSidebar. */
export declare const SIDEBAR_HORIZONTAL_CHROME = 4;
/**
 * Return the width available to children inside RightSidebar.
 *
 * Routed panel frames have their own border and padding, so they must receive
 * this content width rather than claiming the outer sidebar width again.
 */
export declare function computeSidebarContentWidth(sidebarWidth: number): number;
/**
 * Compute the sidebar width in columns for a given terminal width.
 * Returns 0 when the terminal is too narrow for a sidebar.
 *
 * Pure — no React, no Ink — so callers can use the same value for layout
 * math (e.g. narrowing the history column) without mounting the component.
 */
export declare function computeSidebarWidth(termCols: number): number;
export interface RightSidebarProps {
    /**
     * Optional explicit width override (in columns). When omitted, the width
     * is derived from the current terminal width via {@link computeSidebarWidth}.
     */
    width?: number | undefined;
    /**
     * Maximum height in rows. Content beyond this is clipped (scroll handled
     * by the caller via scrollOffset). When omitted, no height cap is applied.
     */
    maxHeight?: number | undefined;
    /**
     * When true, the sidebar border is highlighted to indicate keyboard focus.
     */
    focused?: boolean | undefined;
    /**
     * Content to render inside the sidebar. When omitted, a dimmed placeholder
     * label is shown so the reserved region is visually self-documenting.
     */
    children?: React.ReactNode | undefined;
}
export declare function RightSidebar({ width, maxHeight, focused, children, }: RightSidebarProps): React.ReactElement | null;
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