/**
 * Interactive @mention file picker.
 *
 * Activates when the user types @ in chat. Takes over stdin, renders an
 * overlay list below the current input line, and returns the chosen path
 * via callback. Readline is paused for the duration.
 */
import type { Interface as RLInterface } from 'readline';
export declare function startFilePicker(opts: {
    cwd: string;
    rl: RLInterface;
    promptLine: string;
    queryTyped: string;
    onSelect: (refPath: string) => void;
    onCancel: () => void;
}): void;
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