app/engine/__init__.py

from app.engine.base import ChessEngine, EngineConfig, EngineUnavailable, MoveResult
from app.engine.registry import (
    available_engines,
    get_engine,
    register_engine,
)

__all__ = [
    "ChessEngine",
    "EngineConfig",
    "EngineUnavailable",
    "MoveResult",
    "available_engines",
    "get_engine",
    "register_engine",
]