Extend the whole-word rule to every identity lookup. Once the reader has
decoded a manifest, no identity is re-derived from its raw bytes: not the
signer, not a signer-platform token, not the AI-tool fallback for the
generator, and not the SynthID vendor inference, in identify and in
metadata.synthid_source alike. The byte scans read the manifest store only
when the reader could not open it.
Claim-generator tokens match as whole words through one shared
claim_generator_word_platform (suno no longer matches Sunoco), for images
and video alike.
The verdict now reads SynthID from the decoded C2PA info when the metadata
dict lacks it; three synthetic Google Photos tests had relied on the byte
fallback for that.
Verdicts over 1,379 C2PA files and 468 fixture and capture files are
unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
