A new feature in the AI tool Claude has been implemented, which adds a watermark to any content that has been processed by the tool. This watermark is designed to be invisible, but it remains present even if the content is edited by a human. The purpose of this feature is not explicitly stated, but it suggests that the tool's developers are taking steps to ensure that their work is attributed. The implications of this feature are still unclear, but it may have significant consequences for the use of AI-generated content in various industries. This development matters because it highlights the ongoing debate about the ownership and attribution of AI-generated content.