wai-rs: prove the reconstruction binding over a real jpegai decode #53

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dcharlot merged 1 commit from wai-binding-real-decode into main 2026-08-25 17:10:00 -04:00

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2026-08-01

Transaction Science

wai-rs: prove the reconstruction binding over a REAL jpegai decode ...

The reconstruction_binding unit tests bind over synthetic RGB. This closes the loop
end to end: the byte-exact decoder decodes test256 to pixels, and the C2PA/JPEG-Trust
hard binding is taken over those pixels — sha256 over the canonical RGB8, plus the
descriptor pinning the reproducible decode.

It exercises the property the capability rests on and that neural-coded media could
not have before a byte-exact decode: the decode is deterministic
(decode-equivalence), so the binding taken over one decode verifies a second decode
byte-for-byte, while a single flipped pixel breaks it. Emits the actual assertion
(label science.transaction.wai.hash.reconstruction) over the real decoded image.

Also the first test that compiles `neural_int` + `provenance` together. Gated on the
model bundle; skips cleanly without it.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

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