FOSS 100% does NOT have a moral stance. once you asign morality to your software, its no longer FOSS. freedom as in beer means itt costs you no money, freedom as in speech means you can use it on a missle guidance system.

https://en.wikipedia.org/wiki/The_Free_Software_Definition

Only the parts written by LLMs would be public domain. Everything else would still be copyrighted by Microsoft. See https://fsfe.org/news/2026/news-20260825-01.html

And since there's no easy way for outsiders to determine which part is what, it would be a minefield for anyone trying to use the leaked source code. ReactOS devs would have to stay far, far away to avoid giving MS an easy way to sink the project

With this logic, you can steal the code of someone, ask the LLM to copy it, and then it loses copyright.

Or the opposite per one of my new favorite satire sites: https://malus.sh/