ThumbnailGetTask

construct.thumbnail.get — the cached picture of one primitive (opal-vision §OVD-5.1).

In the namespace construct::opal. Declared in src/libs/libconstruct/construct/opal/ThumbnailGetTask.hpp.

Detailed description

The cheap question. A 128x128 thumbnail costs 25 visual tokens against 2691 for a full window — 108 times cheaper — and it needs no render at all when the cache already holds it, which it usually does: the primitive palette generates these before OPAL ever asks (§OVR-4.1).

The system prompt sends the model here first. A thumbnail answers "what is this piece" for almost nothing. It cannot answer "how do these pieces relate", because it shows one subject from a canned orbit camera. That question needs view.box.