#!/usr/bin/env python3
"""Claude SessionStart hook client for P1 ancestry evidence."""

from __future__ import annotations

import json
import os
import socket
import sys


def main() -> None:
    # Consume the real Claude hook payload without recording transcript paths or
    # prompt content in the evidence artifact.
    hook_input = json.load(sys.stdin)
    conn = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
    conn.connect(os.environ["GATE0_BROKER_SOCKET"])
    conn.sendall((json.dumps({"action": "resolve-hook"}) + "\n").encode())
    response = json.loads(conn.makefile("r", encoding="utf-8").readline())
    conn.close()
    event_name = hook_input.get("hook_event_name")
    if response.get("decision") != "ACCEPT":
        print(f"Gate0 broker rejected {event_name} hook ancestry", file=sys.stderr)
        raise SystemExit(2)
    print(
        json.dumps(
            {
                "hookSpecificOutput": {
                    "hookEventName": event_name,
                    "additionalContext": "GATE0_P1_SUPPORTED_HOOK_ANCESTRY_ACCEPTED",
                }
            }
        )
    )


if __name__ == "__main__":
    main()