/**
 * JSONL event parser for codex --json output.
 *
 * Extracted from tools/handlers.ts to be reusable across
 * single-agent runner and future wave orchestration.
 *
 * Design:
 *   - Skips streaming intermediates (item.started, thread.started, turn.started)
 *   - Extracts completed items as clean JSONL
 *   - Preserves turn.completed for usage stats
 *   - Preserves turn.failed and item.failed for error visibility
 *   - Normalises legacy event shapes to the modern item schema
 *
 * Ref: https://developers.openai.com/codex/noninteractive/
 */
import type { ParsedProcessEvent } from './types.js';
/**
 * Test whether a stderr chunk is noise (should be dropped).
 */
export declare function isStderrNoise(chunk: string): boolean;
/**
 * Parse a single JSONL line from codex --json output.
 *
 * Returns a normalized JSON string, or null if the line should be skipped
 * (intermediates, empty lines, malformed JSON).
 */
export declare function parseCodexEvent(line: string): string | null;
/**
 * Parse a JSON string into a typed event object.
 * Returns null if parsing fails.
 */
export declare function parseEventString(jsonStr: string): ParsedProcessEvent | null;
/**
 * Create a stderr event JSON string from a raw chunk.
 */
export declare function createStderrEvent(chunk: string): string;
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