import type { Auth } from './auth.js';
/**
 * Shared atomic counters — not user-scoped.
 * Any authenticated user can increment; anyone can read.
 * Use for: vote tallies, view counts, leaderboards.
 */
export declare class Counters {
    private readonly appId;
    private readonly apiBase;
    private readonly auth;
    constructor(appId: string, apiBase: string, auth: Auth);
    /** Get all counters (or filter by prefix). Public — no auth required. */
    list(opts?: {
        prefix?: string;
    }): Promise<Record<string, number>>;
    /** Get a single counter value. Public — no auth required. */
    get(key: string): Promise<number>;
    /** Increment (or decrement) a counter. Requires auth. Returns new value. */
    increment(key: string, amount?: number): Promise<number>;
}
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