/**
 * Shared diff utility functions for executor validators.
 * These are used by multiple executors for git diff parsing and line-level detection.
 */
/**
 * Get the diff content for a specific file.
 */
export declare function getFileDiff(workspaceRoot: string, file: string, base: string, head?: string): string;
/**
 * Parse diff to extract changed line numbers (additions only - lines starting with +).
 */
export declare function getChangedLineNumbers(diffContent: string): Set<number>;
/**
 * Parse diff to find newly added method signatures.
 */
export declare function findNewMethodSignaturesInDiff(diffContent: string): Set<string>;
/**
 * Check if any line in [startLine, endLine] is in the changedLines set.
 */
export declare function hasChangesInRange(startLine: number, endLine: number, changedLines: Set<number>): boolean;
/**
 * Check if a node (method or function) is new or has changed lines in its range.
 */
export declare function isNewOrModified(name: string, startLine: number, endLine: number, changedLines: Set<number>, newMethodNames: Set<string>): boolean;