/**
 * Manages task output file persistence with streaming.
 * Ported from mcp-supersubagents/src/services/output-file.ts
 * Uses .codex-agents/ directory (distinct from .super-agents/).
 */
/**
 * Get the output directory path for a given cwd.
 * Returns: {cwd}/.codex-agents/
 */
export declare function getOutputDir(cwd: string): string;
/**
 * Get the output file path for a task.
 * Returns: {cwd}/.codex-agents/{taskId}.output
 */
export declare function getOutputPath(cwd: string, taskId: string): string;
/**
 * Get the last-message file path for a task.
 * Returns: {cwd}/.codex-agents/{taskId}.last-message.txt
 */
export declare function getLastMessagePath(cwd: string, taskId: string): string;
/**
 * Create an empty output file for a task.
 * Returns the absolute path to the output file, or null on failure.
 */
export declare function createOutputFile(cwd: string, taskId: string): Promise<string | null>;
/**
 * Append a line to the task's output file (async, uses persistent handle).
 */
export declare function appendToOutputFile(cwd: string, taskId: string, line: string): Promise<boolean>;
/**
 * Append completion footer to output file and close handle.
 */
export declare function finalizeOutputFile(cwd: string, taskId: string, status: string, error?: string): Promise<boolean>;
/**
 * Close all open file handles (called during shutdown).
 */
export declare function closeAllOutputHandles(): Promise<void>;
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