Low-false-positive detection for verifiable patterns: Unicode invisibles/Bidi, confusables, normalization tricks,
whitespace channels, encoded payloads, URL tracking tokens, acrostics, and repetition/uniformity heuristics.
Optional PHP API improves Unicode/confusable checks (ICU).
More informationen in the github repo
Input
API: not checked
This scanner focuses on output patterns. Statistical “greenlist” watermarks typically require secret keys or model-side telemetry
and cannot be reliably detected from text alone.