/**
 * `email-mcp open` — jump from the terminal to an email in the native client.
 *
 *   email-mcp open <id> [--mailbox INBOX] [--account NAME] [--print]
 *
 * Builds a `message://` deep link from the email's Message-ID and hands it to
 * macOS Launch Services, which opens the message in Mail.app regardless of
 * which mailbox it has since been moved to. `--print` (and any non-macOS
 * platform, which has no `message:` handler) writes the bare URL to stdout
 * instead, so it can be piped into reminders, notes, or other tooling.
 */
export interface OpenPlan {
    action: 'launch' | 'print';
    url: string;
    /** Why the plan fell back to printing (surfaced as a hint on stderr). */
    reason?: string;
}
/** Decide whether to launch the mail client or print the URL. */
export declare function resolveOpenPlan(opts: {
    url: string;
    print: boolean;
    platform: NodeJS.Platform;
}): OpenPlan;
export default function runOpenCommand(argv: string[]): Promise<void>;
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