#!/usr/bin/env python3
"""Fail-closed migration shim for ACK's removed free-form command validator.

ACK v0.10 no longer accepts a shell command as worker configuration.  Keep this
file only so older documentation or automation fails with a precise migration
message instead of silently retaining the unsafe path.
"""

from __future__ import annotations

import sys


MIGRATION_MESSAGE = (
    "ACK v0.10 已停用自由 worker command 校验器；请在 "
    "docs/ack/tasks.yaml 的 project.orchestration 中声明 profile，并仅调用 "
    "scripts/launch_worker.py profile-hash|plan|launch。"
)


def main(argv: list[str] | None = None) -> int:
    arguments = list(sys.argv[1:] if argv is None else argv)
    if arguments == ["--self-test"]:
        print("legacy worker command 路径已 fail-closed")
        return 0
    sys.stderr.write(MIGRATION_MESSAGE + "\n")
    return 2


if __name__ == "__main__":
    raise SystemExit(main())