Much harder to do apparently, but they can still watermark comments. https://www.anthropic.com/news/claude-text-watermark https://www.anthropic.com/news/claude

Much harder to do apparently, but they can still watermark comments. https://www.anthropic.com/news/claude-text-watermark https://www.anthropic.com/news/claude-text-watermark, Ctrl-F for "What about code?"