/**
 * Delta Module v3
 *
 * Handles diff computation and delta storage for attribution tracking.
 * Uses unified diff format for computing what changed between edits.
 *
 * Storage: .git/agentblame/working/{base_sha}/deltas.jsonl
 */
import type { DeltaHunk, EditDelta } from "./types";
/**
 * Get the deltas.jsonl path for a base SHA
 */
export declare function getDeltasPath(repoRoot: string, baseSha: string): string;
/**
 * Compute unified diff hunks between two strings
 * Returns array of DeltaHunk describing what changed
 */
export declare function computeDiff(before: string, after: string): DeltaHunk[];
/**
 * Compute diff and return detailed line information
 * Useful for debugging and testing
 */
export declare function computeDiffDetailed(before: string, after: string): {
    hunks: DeltaHunk[];
    additions: number;
    deletions: number;
};
/**
 * Append a delta to the working log
 * Deltas are stored in JSONL format for append-only writes
 */
export declare function appendDelta(repoRoot: string, baseSha: string, delta: EditDelta): void;
/**
 * Read all deltas for a base SHA
 * Optionally filter by file path
 */
export declare function readDeltas(repoRoot: string, baseSha: string, file?: string): EditDelta[];
/**
 * Read deltas for a specific file (more efficient than filtering all)
 */
export declare function readDeltasForFile(repoRoot: string, baseSha: string, filePath: string): EditDelta[];
/**
 * Get all unique files that have deltas
 */
export declare function getFilesWithDeltas(repoRoot: string, baseSha: string): string[];
/**
 * Get the most recent AI delta for a file (if any)
 * Used to detect if another AI tool recently edited a file
 */
export declare function getLastAIDeltaForFile(repoRoot: string, baseSha: string, filePath: string): EditDelta | null;
/**
 * Get the most recent delta for a file (AI or human)
 * Used to get the latest known state of a file
 */
export declare function getLastDeltaForFile(repoRoot: string, baseSha: string, filePath: string): EditDelta | null;
/**
 * Clear deltas for a base SHA (after commit)
 */
export declare function clearDeltas(repoRoot: string, baseSha: string): void;
/**
 * Get delta statistics for a base SHA
 */
export declare function getDeltaStats(repoRoot: string, baseSha: string): {
    totalDeltas: number;
    aiDeltas: number;
    humanDeltas: number;
    files: number;
    totalAdditions: number;
    totalDeletions: number;
};
/**
 * Create an AI edit delta
 */
export declare function createAIDelta(file: string, sessionId: string, promptId: number | null, hunks: DeltaHunk[], afterBlob?: string): EditDelta;
/**
 * Create a human edit delta
 */
export declare function createHumanDelta(file: string, hunks: DeltaHunk[], afterBlob?: string): EditDelta;