"""
核心抽象接口层（纯ABC，零实现）

只定义策略框架的标准接口，不包含任何业务逻辑
"""

from framework_v2.core.strategy import StrategyBase
from framework_v2.core.factor import FactorBase
from framework_v2.core.signal import SignalGenerator
from framework_v2.core.executor import Executor
from framework_v2.core.data import DataFetcher

__all__ = [
    'StrategyBase',
    'FactorBase',
    'SignalGenerator',
    'Executor',
    'DataFetcher',
]
