/**
 * Terminal Capability Detection
 *
 * Detects terminal features for graceful degradation of Unicode
 * characters, colors, and emoji rendering.
 *
 * @since v2.7.29 - New terminal compatibility system
 */
export interface TerminalCapabilities {
    boxDrawing: boolean;
    braille: boolean;
    emoji: boolean;
    color256: boolean;
    trueColor: boolean;
    name: string;
}
export declare function detectTerminal(): TerminalCapabilities;
/** ASCII fallback characters for terminals without box-drawing support */
export declare const ASCII_BORDERS: {
    readonly tl: "+";
    readonly tr: "+";
    readonly bl: "+";
    readonly br: "+";
    readonly h: "-";
    readonly v: "|";
};
/** Unicode box-drawing characters (default) */
export declare const UNICODE_BORDERS: {
    readonly tl: "╭";
    readonly tr: "╮";
    readonly bl: "╰";
    readonly br: "╯";
    readonly h: "─";
    readonly v: "│";
};
/** Get appropriate border set based on terminal capabilities */
export declare function getBorderChars(): typeof UNICODE_BORDERS | typeof ASCII_BORDERS;
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