export interface ShellPromptOption {
    /** Positional fallback number (1-based). Authoritative answer is `answerKeys`. */
    index: number;
    label: string;
    /** The exact bytes to send to answer this option, e.g. "y\r" or "2\r". */
    answerKeys: string;
}
export interface ShellPrompt {
    prompt: string;
    options: ShellPromptOption[];
}
/**
 * Scrape an unstructured shell prompt from rendered screen lines. Returns null
 * when the tail isn't a recognised prompt (prose, Claude's own UI, empty).
 * Pure — no I/O.
 */
export declare function detectShellPrompt(lines: string[]): ShellPrompt | null;
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