Cognee is an open-source knowledge engine that transforms raw data into persistent AI memory using vector search and graph databases, offering modular knowledge creation with Pythonic pipelines and support for 30+ data sources. (Cognee是一个开源知识引擎,通过向量搜索和图数据库将原始数据转化为持久的AI记忆,提供模块化知识创建功能,支持Pythonic数据管道和30多种数据源。)