App Builder SDK is a client SDK for Baidu AI Cloud Qianfan AppBuilder, offering a one-stop development platform for AI-native application developers. It provides essential features such as invoking large language models and components, orchestrating workflows, monitoring application performance, and deploying applications as API services. The SDK supports building industry-grade RAG applications with various components for document parsing, chunking, embedding, indexing, retrieval, and answer generation. It also allows developers to quickly deploy programs to Baidu Cloud, providing public API services linked to AppBuilder workflows.