/** Pure formatters for WhatsApp MCP tool results (testable without booting the server). */
export declare function buildLoginStartText(result: {
    message?: string;
    pairingCode?: string;
    selfPhone?: string;
}): string;
export declare function attachmentSuffix(att: {
    filename?: string;
    mimeType?: string;
    path?: string;
    sizeBytes?: number;
    readableTextPath?: string;
} | null | undefined): string;
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