/**
 * System Back, on demand: the first time a session reaches for it (healix_device "back", or a
 * healix_try line with pressBackButton( / browser.back( ), the call is not run and the agent
 * gets the short rule instead. The next call runs: by then the choice is deliberate (a test of
 * Android Back itself). One delivery per session covers both tools.
 *
 * Why: system Back does not exist on iOS and is unreliable on some Android drivers
 * (BrowserStack's older UiAutomator2 has no "mobile: pressKey"); the screen's own back or
 * close element works everywhere and is what the user taps.
 */
export declare const BACK_GUIDANCE: string[];
/** True when a try line uses system Back. */
export declare function usesSystemBack(code: string): boolean;
/** Mobile only: on the web, browser.back() is an ordinary browser action. Unknown platform counts as mobile. */
export declare function backGuideApplies(platform: string | null | undefined): boolean;
/**
 * The guidance to return instead of running the call, or null to run it. Marks the session
 * as delivered, so the next call (whichever tool) goes through.
 */
export declare function backGuidanceFor(sessionKey: string): string[] | null;
/** Test seam. */
export declare function resetBackGuidance(): void;