Ask HN: Is "no source code was copied" still a sufficient copyright defense?
Software developers are now facing the same copyright battles that plagued authors and artists—and LLMs just made it a lot harder to prove originality.
Why it matters
As LLMs lower the barrier to entry for software development, copyright and IP defense strategies are being tested in court. The traditional "no source code was copied" defense may no longer hold up—forcing the industry to reckon with questions of derivative work, UI similarity, and what actually constitutes infringement in an AI-assisted world.
The key facts
12 to knowCopyright defense standards shifting as LLM-assisted development becomes norm
UI copying increasingly litigated as differentiation threshold
Expert witnesses now required in copyright disputes
Parallels drawn to copyright challenges faced by authors and artists
Unfair competition claims rising alongside copyright cases
Question: does 'no source code copied' remain legally sufficient defense?
Hacker News discussion on copyright defense standards in LLM era
Community debate: Is copying UI legally permissible if source code isn't copied?
Expert witnesses increasingly required in software copyright disputes
Parallel drawn to copyright battles faced by authors and artists
Legal assessments emerging on product differentiation thresholds
Published June 2026 — forward-looking policy/ethics discussion
Go to the source
Hacker Newsnews.ycombinator.com
Publisher excerpt: We are all familiar with the Corgi event: With the barrier to create new apps having dropped significantly thanks to LLMs, I am seeing more cases about copyright and unfair competition. I've seen and participated in some of these cases. Usually expert witnesses are required. Curious to hear the…