GenWorlds is an open-source development framework designed by Yeager.ai for creating multi-agent systems that use specialized AI agents within dedicated environments called "Worlds." These agents coordinate using shared objects to execute complex tasks and achieve common goals, emphasizing narrow focus for improved performance. The framework is modular, supporting composability and interoperability, allowing developers to monetize their creations through a GenAI marketplace. It features a flexible architecture where agents have multiple "Brains," each targeting specific tasks using large language models, which enhances reliability and output quality. GenWorlds also provides tools for developers to integrate new techniques, ensuring the framework's adaptability. A notable application of this framework is the RoundTable podcast simulation, showcasing agent coordination through dynamic discussions. The GenWorlds ecosystem aims to empower developers by offering a platform that facilitates the creation and monetization of generative AI applications, aligning with Yeager.ai's mission to enhance work life by making generative AI accessible and reliable.