/**
 * Safe-edit module: copy → modify → validate → swap pattern.
 * Prevents bricking by never leaving core files in a broken state.
 */
export interface SafeEditInput {
    /** Workspace-relative path to edit. */
    path: string;
    /** New file content. */
    content: string;
    /** Shell command to validate the change (e.g., "npx tsc --noEmit"). */
    validation_command?: string;
    /** Shell command to run tests (e.g., "npm test"). */
    test_command?: string;
    /** Whether to keep a .ace-backup copy (default: true). */
    backup?: boolean;
}
export interface SafeEditResult {
    ok: boolean;
    original_path: string;
    staging_path: string;
    backup_path?: string;
    original_hash: string;
    new_hash: string;
    validation_passed?: boolean;
    validation_output?: string;
    test_passed?: boolean;
    test_output?: string;
    error?: string;
    restored?: boolean;
}
export interface TestSuiteResult {
    ok: boolean;
    exit_code: number;
    output: string;
    command: string;
    duration_ms: number;
}
export interface DiffResult {
    has_diff: boolean;
    original_lines: number;
    new_lines: number;
    added: number;
    removed: number;
    diff_summary: string;
}
export declare function safeEditFile(input: SafeEditInput): SafeEditResult;
export declare function runTestSuite(command?: string): TestSuiteResult;
export declare function diffContents(original: string, updated: string): DiffResult;
export declare function diffFiles(pathA: string, pathB: string): DiffResult & {
    error?: string;
};
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