But really, relicensing a GPL codebase to MIT is uninteresting.
Let's do the interesting one, which is: vibe code a "clean room" reimplementation of an entire proprietary codebase! After all, Microsoft released a "shared source" proprietary version of Windows. Now try seeing what happens if you run THAT through the "turn it into public domain" machine
Win-win outcome, no matter how it goes
Winning option 1: yes, you can vibe code proprietary codebases into the public domain, allowing us to bootstrap proprietary codebases quickly
Winning option 2: stopping laundering of copyleft codebases
Either of these are interesting outcomes!
@cwebber I'm not sure that's slop, but I won't discount the possibility... 🤔 But this part is funny in the dark humor sort of way:
"...explicitly instructed Claude not to base anything on LGPL/GPL-licensed code."
So, you see, no problem... 🙄
Claude after being explicitly instructed not to base anything on LGPL/GPL-licensed code
@cwebber good times! 😅
It's going to be fun to see how the boundaries of "human produced work" are defined over time, but I expect it will work out in whatever way benefits the big money players in software and media.
Does this only apply to "AI"? What does that mean? If I have a machine generated background crowd or vapour in some frames of my $300M blockbuster movie, can I still copyright it?
@vv yeah that's defintely the shitty outcome for usability
But... given that a lot of shittiness comes from an *uneven playing field* when it comes to copyright stuff, and people thinking they can wear down the commons with no consequences, I think it's worth pushing the needle on this approach
@cwebber I love the idea of weaponizing their reasoning in support of the working class.
Cynically though, I think there’s a third outcome: rules for thee, but not for me. In which Microsoft uses the full weight of their wallet to crush the common person, but is free to steal themselves, to profit off of the open source community. The rest of us are left to victimize each other with little legal recourse.
Is it logically consistent? Nope, but that’s the weird timeline we live in.
@Haste I increasingly see this as big tech and business having found a way to cut the legs off what has been a rapidly growing threat to their business models: FOSS.
GenAI can both copyright wash any source code, especially FOSS, and destroy the FOSS ecosystem. FOSS is terribly vulnerable right now and given the capture of governments and lawmakers by AI hype and lobbyists, I'm not sure it can survive in current form.
The way I read it in this context is that an existing codebase has license (whether GPL, LGPL, or proprietary or whatever), and that by "laundering" the codebase through an LLM, the output no longer retains the retains the license terms. In the US at least, the Supreme Court has ruled that LLM output is uncopyrightable.
So as @cwebber highlights, either the licensewashing works, in which case LLMs can scrub licenses off proprietary codebases giving a leg up on "reproducing" proprietary codebases into the public domain; or it doesn't work, in which case LLM-produced code becomes subject to the licensing of the original code.

With customers ask whether they can use Microsoft’s Copilot services without worrying about copyright claims, we are providing a straightforward answer: yes, you can, and if you are challenged on copyright grounds, we will assume responsibility for the potential legal risks involved.