export type StopConditionPrimitive = string | number | boolean | null;
export interface StopWhenAppStatePathEquals {
    path: string;
    equals: StopConditionPrimitive;
}
export interface StopWhenRule {
    id?: string;
    urlIncludes?: string;
    urlPathEquals?: string;
    textIncludes?: string;
    appStatePathEquals?: StopWhenAppStatePathEquals;
}
export interface StopWhen {
    any: StopWhenRule[];
}
/**
 * A declared observation window (#510): once `when` matches (or at the start, when `when` is
 * absent), the harness holds the page for `ms`, captures a frame every `everyMs`, takes no action
 * and requests no model turn, then hands control back to the participant (`then: continue`) or
 * ends the session (`then: stop`). Bounded by the session budget: a window that would outlast it
 * is cut to fit. The study is observing; the participant is not "waiting".
 */
export interface DwellWindow {
    when?: StopWhen;
    ms: number;
    everyMs: number;
    then: "continue" | "stop";
}
export interface StopConditionObservation {
    url?: string;
    text?: string;
    appState?: Record<string, unknown>;
}
export interface StopConditionMatch {
    id: string;
    ruleIndex: number;
    kinds: string[];
}
export declare function evaluateStopWhen(stopWhen: StopWhen | undefined, observation: StopConditionObservation): StopConditionMatch | undefined;