test-user af787fd8d6 docs(corpus): per-platform watermark map + surface-dependent blind spot ...

Grow the SynthID corpus to 109 originals (91 iPhone-photo negatives,
2 positives) and document what was learned studying 8 platforms:

- README: per-platform watermark map (C2PA issuer / SynthID pixel / IPTC
  / visible sparkle per platform) and an "originals, not previews" note
  (re-encoded previews strip metadata, so a clean preview is not proof).
- CLAUDE.md: surface-dependent blind spot -- the same Google model wraps
  C2PA in the Gemini app but emits the SynthID pixel watermark + sparkle
  with no C2PA/IPTC via the API/playground (AI Studio, Nano Banana), so
  synthid_source returns None despite SynthID being present; only the
  pixel oracle or the visible-sparkle detector catches those.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-24 15:55:17 -07:00

..

samples

feat(metadata): parse C2PA JUMBF manifest fields, add Images 2.0 sample, bump to 0.3.4

2026-04-22 17:21:51 -07:00

synthid_corpus

docs(corpus): per-platform watermark map + surface-dependent blind spot

2026-05-24 15:55:17 -07:00