You'll notice
Useful2 Signal2
Publishing reports back how many custom thumbnails it included.
What's wrong with this entry?
Anonymous. No account, no email.
What
The instructions Claude follows when publishing an artifact now list a Thumbnail field, and the tool's summary counts how many were supplied, so a publish reports back that it included "a custom thumbnail image" or "two custom thumbnail images".
Details
- Sits behind an internal capability check, so the field is only advertised when that check passes.
- The count covers both the light and dark thumbnail.
Evidence
a custom thumbnail image
Strings lifted out of the shipped bundle, so the claim above can be checked against them.