Clean-room design is a method of recreating and relicensing software without infringing any of the copyrights. So what happens when we use LLM's to recreate thousands of open source projects in seconds, and relicense them all to more permissive licenses?

We first started looking at this when in 2025 MongoDB used an AI agent to take thousands of lines of code from a copyleft project, and used Cursor to recreate and relicense it all under apache. The prompts used to do this were left in the repository.

What does it mean for the open source ecosystem that 90% of our open source supply chain can currently be recreated in seconds with today's AI agents?

In this talk we will be demonstrating the process of large scale clean rooming, and explore what it means for open source, and what it means for community.