/**
 * Cost driver gates.
 *
 * A pattern is a cost driver only if BOTH gates pass:
 * 1. Dollar delta > minDollarPerWeek (default $500/wk)
 * 2. Contribution > minContributionPct of total positive delta (default 5%)
 *
 * These are business rules, not statistical constants.
 */
export interface PatternWithDelta {
    delta: number;
}
export interface GateConfig {
    minDollarPerWeek: number;
    minContributionPct: number;
}
export declare const DEFAULT_GATES: GateConfig;
/**
 * Filters patterns through cost driver gates.
 * Returns only patterns that pass both the dollar floor and contribution % gate.
 */
export declare function applyCostDriverGates<T extends PatternWithDelta>(patterns: T[], totalPositiveDelta: number, gates?: GateConfig): T[];