/**
 * Output contract for the Elnora Slack CLI.
 * - Success: JSON/table/CSV to stdout, exit 0
 * - Error: JSON to stderr, exit non-zero (typed exit codes)
 */
export declare function setCompactMode(enabled: boolean): void;
export declare function setOutputFormat(format: string): void;
export declare function setFields(fields: string): void;
export declare function output(data: unknown): void;
export declare function outputError(error: unknown): void;
export declare function handleAsyncCommand<T extends (...args: any[]) => Promise<void>>(fn: T): T;
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