2026-07-03 08:53:56 +08:00
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from __future__ import annotations
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from collections.abc import Awaitable, Callable, Sequence
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from dataclasses import dataclass
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from typing import TYPE_CHECKING, Any, Literal, Union
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from zhenxun.services.ai.core.messages import ChatRequest, ChatResponse
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from zhenxun.services.ai.core.models import LLMContext
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from zhenxun.services.ai.core.options import GenerationConfig
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if TYPE_CHECKING:
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from zhenxun.services.ai.run import AgentRunResult, RunContext
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WrapRunHandler = Callable[[], Awaitable["AgentRunResult[Any]"]]
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"""整个 Agent 运行过程包裹的处理函数类型"""
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WrapModelRequestHandler = Callable[
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[LLMContext[ChatRequest, ChatResponse]], Awaitable[ChatResponse]
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]
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"""单次大模型 API 请求包裹的处理函数类型"""
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WrapToolValidateHandler = Callable[[str | dict[str, Any]], Awaitable[dict[str, Any]]]
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"""工具参数校验过程包裹的处理函数类型"""
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WrapToolExecuteHandler = Callable[[dict[str, Any]], Awaitable[Any]]
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"""单一工具执行过程包裹的处理函数类型"""
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CapabilityPosition = Literal["outermost", "innermost"]
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"""Capability 在洋葱模型中的固定执行位置(最外层或最内层)"""
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CapabilityRef = Union[type["AbstractCapability"], "AbstractCapability"]
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"""对 Capability 的引用,可以是 Capability 实例或类类型"""
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@dataclass
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class CapabilityOrdering:
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"""定义拦截器 (Capability) 的拓扑排序约束。
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采用洋葱模型语义:排在列表前面的拦截器在最外层执行。
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"""
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position: CapabilityPosition | None = None
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"""固定位置:outermost (最外层) 或 innermost (最内层)"""
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wraps: Sequence[CapabilityRef] = ()
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"""当前拦截器必须包裹(即在...之前执行)目标拦截器"""
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wrapped_by: Sequence[CapabilityRef] = ()
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"""当前拦截器必须被包裹(即在...之后执行)目标拦截器"""
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requires: Sequence[type["AbstractCapability"]] = ()
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"""当前拦截器依赖的其他拦截器类型,若缺失则报错"""
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class AbstractCapability:
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"""
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Agent 能力组件基类协议。
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"""
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def get_ordering(self) -> CapabilityOrdering | None:
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"""获取该拦截器的拓扑排序约束。子类可重写此方法以锁定执行顺序。"""
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return None
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async def for_run(self, context: RunContext) -> "AbstractCapability":
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"""获取专用于单次运行的实例,默认返回自身(无状态)。"""
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return self
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async def get_generation_config(
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self, context: RunContext
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) -> GenerationConfig | None:
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"""运行开始前触发。允许动态下发大模型配置(覆盖或合并 Agent 的默认配置)。"""
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return None
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async def get_system_prompts(self, context: RunContext) -> list[str]:
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"""获取该能力提供的系统提示词列表。"""
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return []
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async def get_tools(self, context: RunContext) -> list[Any]:
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"""获取该能力附带的工具列表。"""
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return []
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async def prepare_tools(
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self, context: RunContext, tool_defs: list[Any]
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) -> list[Any]:
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"""运行开始前/装配工具时触发。允许动态增删改当前将发往大模型的工具列表。
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默认实现:无操作,直接返回传入的工具列表。"""
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return tool_defs
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async def wrap_run(
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self, context: RunContext, handler: WrapRunHandler
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) -> "AgentRunResult[Any]":
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"""包裹整个 Agent 运行过程 (洋葱模型)。"""
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return await handler()
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async def wrap_model_request(
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self,
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context: RunContext,
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llm_context: LLMContext[ChatRequest, ChatResponse],
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handler: WrapModelRequestHandler,
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) -> ChatResponse:
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"""包裹单次大模型 API 请求 (洋葱模型)。"""
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return await handler(llm_context)
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async def wrap_tool_validate(
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self,
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context: RunContext,
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tool_name: str,
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args: str | dict[str, Any],
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handler: WrapToolValidateHandler,
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) -> dict[str, Any]:
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"""包裹工具的参数校验过程 (洋葱模型)。"""
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return await handler(args)
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async def wrap_tool_execute(
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self,
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context: RunContext,
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tool_name: str,
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arguments: dict[str, Any],
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handler: WrapToolExecuteHandler,
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) -> Any:
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"""包裹单一工具的执行 (洋葱模型)。"""
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return await handler(arguments)
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