"""Layer 1 surface. Domain derivations register here later. No prompt text, no React payloads."""
from __future__ import annotations

from typing import Any, Callable

_READERS: dict[str, Callable[..., Any]] = {}


def register_reader(key: str, reader: Callable[..., Any]) -> None:
    _READERS[key] = reader


def read(key: str, *, profile_id: str, context: dict[str, Any] | None = None) -> Any:
    if key not in _READERS:
        raise KeyError(key)
    return _READERS[key](profile_id=profile_id, context=context or {})


def list_readers() -> list[str]:
    return sorted(_READERS)