/**
 * Encoded file name format: {fileId}__{encodedName}{ext}
 * Example: "12345__encoded.jpg"
 */
export type EncodedFileName = `${number}__${string}`;
/**
 * Generate a candidate file name for upload
 * @param name - Original file name (with extension)
 * @param destDir - Destination directory path
 * @returns Candidate file name (e.g., "12345__encoded.jpg")
 */
export declare function getCandidateName(name: string, destDir: string): Promise<EncodedFileName>;
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