/**
 * compression:toggle — enable or disable a compression layer in the project config.
 *
 * Usage:
 *   babysitter compression:toggle <layer> <on|off> [--json]
 *
 * Writes the change to .a5c/compression.config.json in the current project.
 */
export type KnownLayer = 'userPromptHook' | 'commandOutputHook' | 'sdkContextHook' | 'processLibraryCache';
export interface CompressionToggleOptions {
    layer: string;
    value: boolean;
    json?: boolean;
    cwd?: string;
}
export declare function handleCompressionToggle(opts: CompressionToggleOptions): Promise<number>;
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