PocketFlow is a minimalist LLM framework implemented in only 100 lines of code, designed for LLMs to engage in autonomous programming. It emphasizes high-level programming paradigms while eliminating low-level implementation details, allowing LLMs to focus on crucial aspects. This framework serves as a learning resource for LLMs, due to its simplicity, making it easy to comprehend and use. It employs a core abstraction of nested directed graphs, breaking tasks into multiple LLM steps and supporting branching and recursive decision-making. PocketFlow is an open-source project, licensed under MIT, offering high flexibility and scalability.