"""Lazy shared expander for card-driven rewrites that lack an agent reference.

process_component_event is invoked by agent.py (over the 200-line edit limit, so its
call signature is fixed) with no agent handle. Card actions that need a rewrite
therefore share one process-wide expander built with the same factory as main.py.
"""

from __future__ import annotations

from typing import Any

_EXPANDER: Any = None


def shared_expander() -> Any:
    global _EXPANDER
    if _EXPANDER is None:
        from ..resume_expansion import build_expander
        from ..settings import load_settings

        _EXPANDER = build_expander(load_settings())
    return _EXPANDER