/**
 * Utility to clean up patch files:
 * - Trims empty lines from the beginning and end of the patch
 * - Removes empty lines around headers (---, +++, @@)
 * - Updates line counts in @@ headers based on actual content
 * - Validates all line prefixes within hunks
 * - Verifies minimum number of context lines if specified
 *
 * @param patchContent - The patch string to clean
 * @param minContextLines - Minimum number of context lines required (lines starting with " " or "-")
 * @returns The cleaned patch string
 * @throws {PatchFormatError} When encountering invalid line prefixes within a hunk
 * @throws {InsufficientContextLinesError} When there are not enough context lines
 */
export declare function cleanPatch(patchContent: string, minContextLines?: number): string;