/**
 * [WHO]: Provides getGitDiff(), getFileDiff(), getChangedFiles(), loadProjectRules()
 * [FROM]: Depends on node child_process/fs/path for local Git and project rule discovery
 * [TO]: Consumed by extensions/optional/simplify/index.ts for changed-file and rule context
 * [HERE]: extensions/optional/simplify/git-utils.ts - simplify extension Git and rule-loading helpers
 */
/**
 * Get list of changed files (staged + unstaged)
 *
 * @param cwd - Working directory
 * @returns Array of file paths, or empty array on error
 */
export declare function getChangedFiles(cwd: string): string[];
/**
 * Get diff for a specific file against HEAD
 *
 * @param cwd - Working directory
 * @param file - File path (relative to cwd)
 * @returns Diff string, or empty string on error
 */
export declare function getFileDiff(cwd: string, file: string): string;
/**
 * Get combined diff string for all changed files
 *
 * @param cwd - Working directory
 * @returns Combined diff string
 */
export declare function getGitDiff(cwd: string): string;
/**
 * Load project rules from common config files
 *
 * Checks for:
 * - CLAUDE.md
 * - AGENTS.md
 * - .cursor/rules
 * - .github/copilot-instructions.md
 *
 * @param cwd - Working directory
 * @returns Combined rules string (truncated per file to 2000 chars)
 */
export declare function loadProjectRules(cwd: string): string;