/**
 * CLI I/O Utilities.
 *
 * Handles stdin/stdout communication for CLI hooks.
 * Used by hook commands to read input and write output.
 */
import type { Readable, Writable } from 'stream';
import type { SessionTrigger } from '../../domain';
/**
 * Read JSON input from stdin with timeout.
 *
 * Returns empty object if stdin is empty or times out.
 *
 * @param stdin - Input stream (defaults to process.stdin)
 * @param timeoutMs - Timeout in milliseconds
 */
export declare function readJsonFromStdin<T>(stdin?: Readable, timeoutMs?: number): Promise<T>;
/**
 * Write JSON output to stdout.
 *
 * Handles backpressure properly.
 *
 * @param data - Data to serialize and write
 * @param stdout - Output stream (defaults to process.stdout)
 */
export declare function writeJsonToStdout<T>(data: T, stdout?: Writable): Promise<void>;
/**
 * Write text to a stream, handling backpressure.
 *
 * @param stream - Output stream
 * @param text - Text to write
 */
export declare function writeToStream(stream: Writable, text: string): Promise<void>;
/**
 * Write a status message to stderr.
 *
 * Status messages are shown to the user in Claude Code.
 *
 * @param message - Message to write
 * @param stderr - Error stream (defaults to process.stderr)
 */
export declare function writeStatus(message: string, stderr?: Writable): Promise<void>;
/**
 * Parse session trigger from Claude Code hook input.
 *
 * Claude Code sends different values depending on the event:
 * - source: "startup", "resume"
 * - session_type: "new", "existing"
 *
 * @param source - The source field from hook input
 * @param sessionType - The session_type field from hook input
 */
export declare function parseTrigger(source?: string, sessionType?: string, trigger?: string): SessionTrigger;
/**
 * Claude Code hook input for session start.
 */
export interface ISessionStartInput {
    source?: string;
    trigger?: string;
    session_type?: string;
    cwd?: string;
    session_id?: string;
}
/**
 * Claude Code hook input for session stop.
 */
export interface ISessionStopInput {
    session_id?: string;
    transcript_path?: string;
    cwd?: string;
}
/**
 * Claude Code hook input for prompt submit.
 */
export interface IPromptSubmitInput {
    prompt?: string;
    content?: string;
    permission_mode?: string;
    permissionMode?: string;
    session_id?: string;
}
/**
 * Claude Code hook output format.
 */
export interface IHookOutput {
    hookSpecificOutput?: {
        hookEventName: string;
        additionalContext?: string;
    };
}
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