/**
 * Summary File Writer
 * Persists enhanced run summaries to JSON files for later retrieval
 */
import type { RunSummary } from '../tui/screens/RunScreen.js';
/**
 * Write enhanced run summary to a JSON file in the temp directory
 *
 * @param featureName - The feature name used to construct the file path
 * @param summary - The complete RunSummary object to persist
 * @returns Promise that resolves when the file is written, or rejects on error
 *
 * Uses RALPH_SUMMARY_TMP_DIR environment variable if set, otherwise os.tmpdir().
 *
 * @example
 * ```ts
 * await writeRunSummaryFile('my-feature', {
 *   feature: 'my-feature',
 *   exitCode: 0,
 *   // ... other RunSummary fields
 * });
 * // Writes to: <tmpdir>/ralph-loop-my-feature.summary.json
 * ```
 */
export declare function writeRunSummaryFile(featureName: string, summary: RunSummary): Promise<void>;