/**
 * Power-saver notifier — ADR-314 §A out-of-band signal path.
 *
 * Structural mirror of rate-limit-notifier.ts, same self-reported/manual
 * constraint (ADR-312's detection gap applies unchanged — ruflo cannot read
 * "your account is at 20%" any more than it can read "you are rate
 * limited"). Deliberately a SEPARATE flag from rate-limited: "running low,
 * want to proactively conserve" (still have capacity) and "blocked" (zero
 * capacity left) are different urgencies — conflating them would mean
 * power-saver mode never fires until you're already blocked (too late to
 * have conserved anything).
 *
 * State is cheap and durable:
 *   ~/.ruflo/quota-status.json = { low: bool, since: ISO, cleared: ISO|null, lastToggleAt: ISO|null }
 *
 * Same 6h TTL rationale as rate-limit-notifier.ts, and the same ADR-314 §D1
 * toggle cooldown (10 min) — a self-reported flag with zero server-side
 * verification needs at least this much client-side friction against
 * casual always-on gaming.
 */
export declare const QUOTA_STATUS_FILE = "quota-status.json";
/** Auto-expire a forgotten manual flag after 6h (see module doc). */
export declare const QUOTA_LOW_TTL_MS: number;
export interface QuotaLowStatus {
    low: boolean;
    since: string | null;
    cleared: string | null;
    lastToggleAt: string | null;
}
/** Read the current power-saver status. Never throws. Applies the TTL. */
export declare function readQuotaLowStatus(now?: Date): QuotaLowStatus;
/**
 * Mark quota as running low — idempotent, cooldown-gated (ADR-314 §D1).
 * Returns false when the cooldown blocks the flip (not yet applied).
 */
export declare function markQuotaLow(now?: Date): boolean;
/** Clear power-saver status. Cooldown-gated the same way as the mark direction. */
export declare function clearQuotaLowStatus(now?: Date): boolean;
/**
 * User-facing single-line summary — plain text, no ANSI. Returns null when
 * not flagged low (no surface).
 */
export declare function quotaLowNotice(now?: Date): string | null;
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