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♻️ refactor(agent): 重构 Agent 状态管理与执行器流程,优化 Token 预估与自愈反思机制 (#2150)
- 统一使用 `run_context.run.messages` 作为消息历史的单一数据源,清理 `AgentState` 冗余字段 - 将工具消息装配逻辑 `assemble_tool_message` 提取并重构至 `ToolExecutor` - 引入 `token_drift` 动态校准偏移量,并精确计算工具与系统提示词的 Token 开销 - 重构 `ReflexionCapability` 自愈反思引擎,基于异常多态与模板字典动态生成反馈提示词 - 支持通过 `resolve_model_capabilities` 解析并合并用户自定义的模型能力覆盖 - 在执行器循环中支持 `should_reset_cycle`,以优雅处理外部干预(如用户追加指示) - 扩展 `capabilities` 中对 `gpt-[5-9]*` 等新型号模型的能力定义与上下文限制 Co-authored-by: webjoin111 <455457521@qq.com>
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@@ -3,6 +3,7 @@ from typing import cast
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from zhenxun.services.ai.core.engine.context_renderer import ContextConverter
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from zhenxun.services.ai.core.messages import AgentMessage
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from zhenxun.services.ai.core.models import ModelCapabilities
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from zhenxun.services.ai.run.context import RunContext
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from zhenxun.services.ai.utils.logger import log_memory as logger
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from zhenxun.utils.pydantic_compat import model_copy
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@@ -42,7 +43,9 @@ class SessionMemoryContext:
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async def read(
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self,
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model_name: str,
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capabilities: ModelCapabilities | None = None,
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override_history: Sequence[AgentMessage] | None = None,
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base_overhead: int = 0,
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) -> list[AgentMessage]:
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"""
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拉取短期对话历史,并执行 Token 压缩与管线修剪。
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@@ -69,14 +72,16 @@ class SessionMemoryContext:
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)
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pipeline = CondenserPipeline.create_from_configs(
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self.memory_config, model_name
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self.memory_config, capabilities, model_name
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)
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if pipeline.reducers:
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flattened_to_reduce = ContextConverter.flatten_to_llm_messages(
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current_history
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)
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new_history, changed = await pipeline.run(
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flattened_to_reduce, model_name=model_name, base_overhead=0
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flattened_to_reduce,
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model_name=model_name,
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base_overhead=base_overhead,
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)
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if changed:
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await chat_context.set_messages(self.session_meta, new_history)
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