/**
 * `~/.lyse/profile.json` records the once-per-machine opt-in decision so we
 * never re-prompt. After a 2xx from the Worker the email itself is dropped
 * locally (only `sentAt` survives); if delivery failed we keep the email
 * locally so the next audit can retry.
 */
export type ProfileFile = {
    email: string;
    createdAt: string;
    lyseVersion: string;
    sentAt?: string;
} | {
    declined: true;
    declinedAt: string;
    lyseVersion: string;
};
export declare function workerEmailEndpoint(env?: NodeJS.ProcessEnv): string;
export declare function isValidEmail(input: string): boolean;
export declare function profilePath(homeDir?: string): string;
export declare function hasProfileDecision(homeDir?: string): boolean;
export declare function readProfile(homeDir?: string): ProfileFile | null;
export declare function shouldPromptForEmail(opt: {
    yes?: boolean;
}, env?: NodeJS.ProcessEnv, isTTY?: boolean, homeDir?: string): boolean;
export declare function buildProfile(email: string, now?: Date): ProfileFile;
export declare function buildDeclinedProfile(now?: Date): ProfileFile;
export declare function persistProfile(profile: ProfileFile, homeDir?: string): Promise<string>;
export declare function postEmailToWorker(email: string, opt?: {
    endpoint?: string;
    timeoutMs?: number;
    env?: NodeJS.ProcessEnv;
}): Promise<boolean>;
export declare function syncPendingEmail(homeDir?: string): Promise<"sent" | "skipped" | "failed">;
export declare function maybePromptForEmail(opt: {
    yes?: boolean;
}): Promise<void>;