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Superficial Thinking

基于推理的 LLM 记忆层 - 一个轻量级、高效的记忆管理系统。

概述

Superficial Thinking 是一个为 LLM 应用设计的记忆层,通过分层记忆架构和智能压缩,在保持上下文连贯性的同时大幅降低 API 调用成本。

核心特性

  • 分层记忆架构:工作记忆(精准)→ 模糊记忆(压缩)→ 持久化存储
  • 低成本设计:运行时零 LLM 调用,仅在批量压缩时调用
  • 关键词索引:支持部分匹配的快速检索
  • 异步优先:完全异步设计,支持高并发场景
  • 持久化存储:SQLite 后端,自动保存与恢复

架构

┌─────────────────────────────────────────────────────────┐
│                    初始化阶段                            │
│  加载持久化记忆 → 关键词索引构建                         │
└─────────────────────────────────────────────────────────┘
                           ↓
┌─────────────────────────────────────────────────────────┐
│                    运行时(无 LLM 调用)                 │
│  ┌──────────────┐    ┌──────────────┐                   │
│  │  工作记忆     │    │  模糊记忆     │                   │
│  │  (精准、近期) │    │  (压缩、关联) │                   │
│  │  直接添加     │    │  关键词索引   │                   │
│  └──────────────┘    └──────────────┘                   │
│         ↓ 达到上限触发批量压缩(1次 LLM)               │
└─────────────────────────────────────────────────────────┘
                           ↓
┌─────────────────────────────────────────────────────────┐
│              query_memory 工具(LLM 按需调用)          │
│  关键词检索 → LLM 汇总 → 流畅语段返回                   │
└─────────────────────────────────────────────────────────┘

安装

pip install dawn_shuttle_superficial_thinking

快速开始

import asyncio
from dawn_shuttle.dawn_shuttle_intelligence import OpenAICompatibleProvider
from dawn_shuttle.dawn_shuttle_superficial_thinking import MemoryManager, MemoryConfig

async def main():
    # 初始化 LLM 提供者
    provider = OpenAICompatibleProvider(
        api_key="your-api-key",
        base_url="https://api.example.com/v1"
    )
    
    # 创建记忆管理器
    config = MemoryConfig(
        db_path="memory.db",
        working_max_messages=20,  # 工作记忆容量
    )
    memory = MemoryManager(
        llm=provider,
        system_prompt="你是一个智能助手。",
        config=config,
        model="gpt-4"
    )
    
    # 初始化
    await memory.initialize()
    
    # 添加消息(无 LLM 调用)
    await memory.add_message("user", "我是张三,我喜欢 Python")
    await memory.add_message("assistant", "你好张三!")
    
    # 检索相关记忆(无 LLM 调用)
    result = await memory.retrieve("用户的编程偏好")
    for mem in result.fuzzy_memories:
        print(mem.summary)
    
    # 按需查询(有 LLM 调用,返回流畅语段)
    answer = await memory.query_memory("张三喜欢什么?")
    print(answer)
    
    # 获取上下文
    context = memory.get_context()
    
    # 关闭
    await memory.close()

asyncio.run(main())

LLM 调用优化

场景 传统方案 本方案
每条消息 1-2 次 0 次
检索 2 次 0 次
压缩 每次 1 条 批量 1 次
按需查询 - 1-2 次

配置说明

@dataclass
class MemoryConfig:
    # 工作记忆
    working_max_messages: int = 20      # 最大消息数量
    working_max_tokens: int = 4000      # 最大 token 数量
    
    # 模糊记忆
    fuzzy_max_nodes: int = 100          # 最大节点数
    fuzzy_decay_lambda: float = 0.01    # 权重衰减率
    
    # 检索
    retrieval_top_k: int = 10           # 返回记忆数量
    retrieval_candidates: int = 20      # 候选数量
    retrieval_threshold: float = 0.3    # 相关性阈值
    
    # 持久化
    db_path: str = "memory.db"          # 数据库路径
    auto_save: bool = True              # 自动保存
    save_interval: int = 10             # 保存间隔
    
    # 压缩
    compress_batch_size: int = 5        # 压缩批大小

API 参考

MemoryManager

主入口类,管理整个记忆系统。

方法

方法 说明 LLM 调用
initialize() 初始化记忆系统 0-1 次
add_message(role, content) 添加消息 0 次
retrieve(query) 检索相关记忆 0 次
query_memory(query) 按需查询(工具) 1-2 次
get_context() 获取对话上下文 0 次
get_stats() 获取统计信息 0 次
close() 关闭并保存 0 次

核心类型

# 精准记忆(工作记忆中的原始消息)
@dataclass
class PreciseMemory:
    role: Literal["user", "assistant", "system"]
    content: str
    timestamp: datetime
    importance: float
    metadata: dict[str, Any]

# 模糊记忆(压缩后的摘要)
@dataclass
class FuzzyMemory:
    id: str
    summary: str                    # 压缩摘要
    triples: list[Triple]           # 知识三元组
    keywords: Keywords              # 关键词
    weight: float                   # 权重(时间衰减)
    importance: float
    source_ids: list[str]           # 来源记忆ID

# 检索结果
@dataclass
class RetrievalResult:
    fuzzy_memories: list[FuzzyMemory]
    precise_memories: list[PreciseMemory]
    confidence: float
    reason: str

依赖

  • Python >= 3.10
  • dawn_shuttle_intelligence (LLM 接口)

开发

# 安装开发依赖
pip install -e ".[dev]"

# 运行测试
pytest

# 代码检查
ruff check .
mypy .

许可证

MIT License

贡献

欢迎提交 Issue 和 Pull Request!

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