#!/usr/bin/env python3
"""
PrePrompt hook for PMDA drug info skill.
Injects usage instructions for the drug information tools.
"""
import sys
from pathlib import Path


def main():
    prompt_file = Path(__file__).parent / "pmda-instructions.md"
    if prompt_file.exists():
        print(prompt_file.read_text(encoding="utf-8"))
    return 0


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