Guides

What these systems actually do, sourced and dated — including the parts that make our own product less impressive than the marketing in this category usually claims.

• The AO3 Claude AI detector skin, explained

  What the AO3 Claude detector site skin actually checks, why it has no false positives, and how the artifact gets into a fic in the first place.

• Does Claude watermark text? (August 2026)

  Anthropic announced text watermarking for Claude. Here is precisely which models carry it, what it does, and why no shipped model is marked yet.

• What Claude actually leaves in text you copy and paste

  A complete list of the artifacts that survive copying from a Claude or ChatGPT window, which of them are detectable, and which are meaningless.

• AI watermarks vs AI detectors: not the same thing

  Watermarks and detectors work in opposite directions and fail in opposite ways. Confusing them is why so much advice about this is wrong.