#!/usr/bin/env python3
"""
PostAgent Hook - Post-response processing example

Executed after the agent finishes; can be used to record analytics data,
trigger follow-up workflows, etc.
"""
import os
import sys


def main():
    """Read parameters from environment variables and process them."""
    response = os.environ.get('RESPONSE', '')
    metadata = os.environ.get('METADATA', '')
    user_identifier = os.environ.get('USER_IDENTIFIER', '')
    session_id = os.environ.get('SESSION_ID', '')

    # Example: record response length for analytics
    if response:
        response_length = len(response)
        print(f"PostAgent hook: User={user_identifier}, Session={session_id}, Response Length={response_length}", file=sys.stderr)

        # Additional logic can be added here, such as:
        # - Sending analytics data to a monitoring system
        # - Triggering async tasks (e.g., sending notification emails)
        # - Recording user behavior for personalized recommendations

    return 0


if __name__ == '__main__':
    sys.exit(main())