The load-time root fetch's validator, offered to the first poll (SceneIdentityWatchdog.seedFromLoad). Carries EVIDENCE that the document it names is the scene that was loaded — never trusted on its own.
Which root document the load fetched.
That response's ETag.
ETag
Optional
Its content_hash, when already known (cache validation derived it).
content_hash
Its bytes, when the hash is not known or the scene is hash-less.
The load-time root fetch's validator, offered to the first poll (SceneIdentityWatchdog.seedFromLoad). Carries EVIDENCE that the document it names is the scene that was loaded — never trusted on its own.