export interface NudgeState {
    schemaVersion: number;
    searchesSinceAsk: number;
    lastAskAt: string | null;
    explicitDeclineCount: number;
    disabled: boolean;
}
export declare const NUDGE_STATE_SCHEMA_VERSION = 1;
export declare const AUTO_QUIET_DECLINE_THRESHOLD = 3;
export declare const NUDGE_CADENCE_DAYS = 7;
export declare const MS_PER_DAY: number;
export type OfferState = "not-yet-asked" | "asked" | "declined" | "enabled";
export declare function coherentInitRow(): NudgeState;
export declare function deriveOfferState(state: NudgeState, modelPresent: boolean): OfferState;
export type NudgeIneligibleReason = "model-present" | "disabled" | "auto-quiet" | "cadence";
export declare function classifyEligibility(state: NudgeState, modelPresent: boolean, now: Date): {
    eligible: boolean;
    reason: NudgeIneligibleReason | null;
};
export declare function isEligible(args: {
    state: NudgeState;
    modelPresent: boolean;
    now: Date;
}): boolean;
export declare function recordSearch(state: NudgeState): NudgeState;
export declare function recordAsked(state: NudgeState, now: Date): NudgeState;
export declare function recordDecline(state: NudgeState): NudgeState;
export declare function recordNever(state: NudgeState): NudgeState;
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