The relationship between copyright and computer software has evolved significantly over time, with early versions of Unix operating systems being distributed freely along with their source code, leading to a landmark copyright lawsuit in 1979. The MIT license, which was used by Replit for its public Repls, is the same one that enables users to fork, modify, and freely distribute the code. This licensing approach has allowed Replit to build on the open-source foundations of Unix and Linux, and has provided a flexible framework for developers to collaborate and share their work. The emergence of AI technologies such as generative language models (LLMs) has raised new questions about copyright law, with companies like Napster and Google having successfully navigated similar challenges in the past. Replit is taking a creator-friendly approach by licensing its public Repls under the MIT license, which allows users to use the code for training LLMs without restrictions. The company's decision has provided a foundation for the development of Ghostwriter, a coding assistant that leverages open-source data and follows the same principles as Replit.