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Ship the measured Meta Content Seal cohort with auto routing and --vendor override

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Full Meta Muse Image support in the invisible-removal path:

- QWEN_ZIMAGE_META_STRENGTH = 0.1: derived by the standard
  worst-boundary-plus-cross-source-spread method over five oracle-bracketed
  generations (data/contentseal/manifest.csv)
- Auto mode: vendor_for_strength routes a file whose only provenance is the
  standalone AI IPTC trainedAlgorithmicMedia tag onto the meta cohort; C2PA
  issuers win first, so Google/OpenAI/Microsoft routing is unchanged. Muse
  WebP outputs place the XMP in a tail chunk, so the scan uses the shared
  chunk-aware metadata.scan_head rather than a plain head read
- Explicit override: --vendor on invisible/all/batch and
  InvisibleOptions.vendor name the cohort on stripped files; naming a cohort
  asserts the watermark is present, so the no-signal gate treats it like
  --force at both the CLI and API seams
- sdxl-zimage has no measured Meta rung: an explicit meta vendor falls to
  the conservative unknown 0.25 rather than inventing one
- identify emits a Content Seal caveat pointing at the removal path
- The legacy visible 'Imagined with AI' mark stays unregistered: a dedicated
  sample hunt (newsroom mockups, community posts, press screenshots, dead
  imagine.meta.com, broken Wayback captures) found no pixel-verifiable
  capture, and the registry rule forbids encoding a corner without one.
  erase --region remains its removal path; outcome recorded in the landscape

Co-Authored-By: Claude Fable 4.5 <noreply@anthropic.com>
This commit is contained in:
Victor Kuznetsov
2026-08-26 22:59:23 -07:00
co-authored by Claude Fable 4.5
parent a1811b6221
commit ab528ec0e8
12 changed files with 260 additions and 33 deletions
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data/contentseal/README.md
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@@ -78,10 +78,9 @@ Measured (2026-08-26/27, oracle `meta.ai/identification`):
between easiest and hardest).
- Derived Meta floor by the existing worst-boundary-plus-cross-source-spread
method: 0.06 + (0.0525 - 0.015) = 0.0975, rounded to **0.1**.
- Not shipped as a constant: no provenance signal routes Muse outputs onto a
vendor cohort, so the default curve stays authoritative and 0.1 is recorded
as the floor to encode if an explicit Meta override is ever added.
- Shipped as `QWEN_ZIMAGE_META_STRENGTH`: auto mode routes standalone-AI-IPTC
files onto the cohort, and `--vendor meta` / `InvisibleOptions.vendor`
names it explicitly on stripped files (implying the scrub runs).
## Regeneration
API key is not stored in this repository. Regenerate with the script pattern