/**
 * Async generator that yields commit SHAs one at a time using git plumbing commands.
 * Uses git rev-list --all to get all commits reachable from any ref.
 *
 * @param gitDir Optional path to git directory (defaults to current repo)
 * @returns Async generator yielding commit SHA hashes
 */
export declare function getAllCommits(gitDir?: string): AsyncGenerator<string>;
/**
 * Async function to get commit details using git cat-file (plumbing command)
 *
 * @param commitSha The commit SHA to inspect
 * @param gitDir Optional path to git directory
 * @returns Promise resolving to raw commit object content
 */
export declare function getCommitDetails(commitSha: string, gitDir?: string): Promise<string>;
/**
 * Async function to get diff between commit and its parent(s) using plumbing commands
 *
 * @param commitSha The commit SHA to diff
 * @param gitDir Optional path to git directory
 * @returns Promise resolving to raw diff output
 */
export declare function getCommitDiff(commitSha: string, gitDir?: string): Promise<string>;
/**
 * Get file contents before and after a specific commit
 *
 * @param filePath The path to the file relative to repository root
 * @param commitSha The commit SHA to check
 * @param gitDir Optional path to git directory
 * @returns Promise<[beforeContents, afterContents]> Tuple of file contents before and after the commit
 */
export declare function getFileContentsBeforeAfter(filePath: string, commitSha: string, gitDir?: string): Promise<[string, string]>;