import { ParseResult, RuleType } from './types';
export interface Stats {
    total: number;
    byType: Record<RuleType, number>;
    /** Actionable network rules (block + allow + hosts). */
    network: number;
}
/**
 * Summarize the composition of a filter list. Maintainers use this to spot, for
 * example, a list that is 90% cosmetic rules when it claims to be a network
 * blocklist, or a sudden jump in rule count between releases.
 */
export declare function stats(result: ParseResult): Stats;
/**
 * Compare two parsed lists and report which network rules were added or removed.
 * Keyed by `type:pattern` so a rule that merely moved lines is not reported as
 * a change.
 */
export declare function diff(a: ParseResult, b: ParseResult): {
    added: string[];
    removed: string[];
};