Pocket Flow, listed here as Mini LLM Flow, is an open-source framework on GitHub that fits its core into about a hundred lines of code. The idea is to give you the building blocks for LLM apps and agents without a large, complicated library.
Its tagline suggests letting agents build other agents, meaning AI coding assistants can easily understand and extend it. It is free and popular with developers, and suits anyone who wants to learn how agent frameworks work or keep their projects light.