"""
核心模块 - 提供扩展性基础设施

包含:
- Registry: 注册机制
- State: 增强的状态管理
- Provider: LLM Provider 抽象
- Response: 统一响应格式
"""

from .registry import (
    BaseRegistry,
    NodeRegistry,
    ToolRegistry,
    WorkflowRegistry,
    ProviderRegistry,
    RegistryEntry,
    ToolMetadata,
    WorkflowMetadata,
    ProviderMetadata,
    register_tool,
    register_workflow,
    register_provider,
)
from .state import AgentState, StateContext
from .providers import LLMProvider, LLMFactory
from .response import ApiResponse, StreamEvent

__all__ = [
    # Registry
    "BaseRegistry",
    "NodeRegistry",
    "ToolRegistry",
    "WorkflowRegistry",
    "ProviderRegistry",
    "RegistryEntry",
    "ToolMetadata",
    "WorkflowMetadata",
    "ProviderMetadata",
    "register_tool",
    "register_workflow",
    "register_provider",
    # State
    "AgentState",
    "StateContext",
    # Provider
    "LLMProvider",
    "LLMFactory",
    # Response
    "ApiResponse",
    "StreamEvent",
]