/**
 * NotebookLM chat extraction with streaming-stability detection.
 *
 * Replaces the legacy `waitForLatestAnswer()` (issue #43). Old logic gated on
 * `div.thinking-message`, which Google removed; calls timed out even though
 * the answer was visible. New logic only relies on the answer container itself
 * and treats text as final once it has been *stable* across N consecutive
 * polls (default 3). That makes the wait robust to UI churn and Material-icon
 * leaks (`more_vert`, `more_horiz`, …) which would otherwise destabilise the
 * extracted text.
 *
 * Companion fixes:
 * - issue #14 / #27 — timeout is fully configurable per call
 * - issue #16    — bounded polls + sleep fallback to defuse zombie pages
 * - issue #28    — sanitisation strips UI-control labels before delivery
 */
import type { Page } from "patchright";
export interface AskOptions {
    /** The question text — used to skip echo lines that NotebookLM mirrors back. */
    question?: string;
    /** Hard ceiling on the wait. Default 600 000 ms (10 min) — overridable per call. */
    timeoutMs?: number;
    /** Poll cadence. Default 750 ms. Lower values increase load without much benefit. */
    pollIntervalMs?: number;
    /** Texts known *before* the question was submitted. Used to skip prior answers. */
    ignoreTexts?: string[];
    /** How many consecutive identical polls count as "answer settled". Default 3. */
    stablePolls?: number;
}
/**
 * Snapshot every visible assistant answer text *before* a new question is
 * submitted. Pass the result into `waitForStableAnswer({ ignoreTexts })` so
 * the new turn isn't confused with prior turns in the same session.
 */
export declare function snapshotPriorAnswers(page: Page): Promise<string[]>;
/**
 * Wait for the *latest* answer text to appear and stabilise.
 *
 * Returns the sanitised final text, or `null` on timeout. The function never
 * throws on UI hiccups — failure surfaces as `null` so the caller can decide
 * how to recover (retry vs. report error to the user).
 */
export declare function waitForStableAnswer(page: Page, options?: AskOptions): Promise<string | null>;
/**
 * Strip Material-icon labels (`more_vert`, `more_horiz`, …) and orphaned
 * citation markers that NotebookLM occasionally leaks into `innerText`.
 * Only isolated lines are removed — never inline content — so legitimate
 * answer prose with the same words ("more horizontal") is not touched.
 */
export declare function sanitizeAnswer(text: string): string;
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