/**
 * Deletes KV cache files.
 *
 * @param params - The delete cache parameters
 * @param params.all - If true, deletes all cache files
 * @param params.kvCacheKey - The cache key to delete
 * @param params.modelId - Optional: specific model ID to delete within the cache key. If not provided, deletes entire cache key.
 * @returns Promise resolving to success status
 * @throws {QvacErrorBase} When the cache parameters are invalid (`InvalidDeleteCacheParamsError`) or the server reports a delete failure (`DeleteCacheFailedError`).
 * @example
 * ```typescript
 * // Delete all caches
 * await deleteCache({ all: true });
 *
 * // Delete entire cache key (all models)
 * await deleteCache({ kvCacheKey: "my-session" });
 *
 * // Delete only specific model within cache key
 * await deleteCache({ kvCacheKey: "my-session", modelId: "model-abc123" });
 * ```
 */
export declare function deleteCache(params: {
    all: true;
} | {
    kvCacheKey: string;
    modelId?: string;
}): Promise<{
    success: boolean;
}>;
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