Module blob 

Blob negotiation: the exchange that keeps asset bytes off the render request. A client asks which digests the server is missing, uploads only those, and renders.

Structs

BlobCheckRequest

“Which of these do you already have?” — sent before a render (or before re-uploading a large asset set) to avoid a doomed round-trip.

BlobCheckResponse

The subset of the requested digests the server does not hold. Empty means a render with that manifest will not stall on missing assets.

MissingBlob

One manifest entry the server cannot resolve. Carries the key as well as the digest so the client knows which of its own assets to upload without keeping a reverse index.

MissingBlobsError

409 Conflict body from a render whose manifest references digests the server does not hold. This is the negotiation a client retries on: upload missing, then repeat the identical render request.