/**
 * digestCron.ts
 *
 * Weekly brain activity digest — cron orchestrator.
 *
 * Schedule: Sunday 08:00 UTC (aligned with brainspace week-end review).
 * Reads opted-in users from `digest_preferences`, generates a digest for
 * each user's wiki, emails them via Resend, and saves the digest page to
 * `history/digest-YYYY-WW.md` in their scoped storage.
 *
 * Phase 1 acceptance:
 *   - CRON fires Sunday 08:00 UTC
 *   - Digest covers prior 7 days
 *   - Email sent to opted-in users
 *   - Digest saved to history/ namespace
 *   - Manual trigger via runDigestForUser()
 */
import { type StorageClient } from "../storage/client.js";
export declare function msUntilNextSundayAt8UTC(now?: Date): number;
interface DigestConfig {
    supabaseUrl: string;
    serviceRoleKey: string;
    resendApiKey: string;
    fromEmail: string;
    fromName: string;
}
export interface DigestResult {
    userId: string;
    email: string;
    skipped: boolean;
    skipReason?: string;
    pageSaved?: string;
    emailSent: boolean;
    error?: string;
}
export declare function runDigestForUser(userId: string, userEmail: string, userDrive: StorageClient, config: DigestConfig, now?: Date): Promise<DigestResult>;
export declare function runWeeklyDigest(baseDrive: StorageClient, config: DigestConfig, now?: Date): Promise<DigestResult[]>;
export declare function startDigestCron(baseDrive: StorageClient, config: DigestConfig): () => void;
export {};
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