/**
 * Adds the uncompletable prefix (* ) to task content if not already present
 * @param content - The task content
 * @returns Content with uncompletable prefix added
 */
export declare function addUncompletablePrefix(content: string): string;
/**
 * Removes the uncompletable prefix (* ) from task content if present
 * @param content - The task content
 * @returns Content with uncompletable prefix removed
 */
export declare function removeUncompletablePrefix(content: string): string;
/**
 * Checks if task content has the uncompletable prefix (* )
 * @param content - The task content
 * @returns True if content starts with uncompletable prefix
 */
export declare function hasUncompletablePrefix(content: string): boolean;
/**
 * Processes task content based on isUncompletable flag, with content prefix taking precedence
 * @param content - The original task content
 * @param isUncompletable - Optional flag to make task uncompletable
 * @returns Processed content
 *
 * Logic:
 * - If content already has * prefix, task is uncompletable regardless of flag
 * - If content doesn't have * prefix and isUncompletable is true, add the prefix
 * - If isUncompletable is undefined or false (and no prefix), leave content unchanged
 */
export declare function processTaskContent(content: string, isUncompletable?: boolean): string;