IMAGE_PART_MEDIA_TYPES

@forge/monorepo / backend/src / IMAGE_PART_MEDIA_TYPES

Variable: IMAGE_PART_MEDIA_TYPES

const IMAGE_PART_MEDIA_TYPES: readonly ["image/png", "image/jpeg", "image/webp", "image/gif"]

Defined in: backend/src/files/turn-parts.ts:44

Media types that may travel as an image part, by modality.

An allow-list, not a image/* wildcard — the same choice read_attachment makes for text. A wildcard admits every future format a provider does not accept, and the failure arrives from the provider as a 400 nobody can act on. image/svg+xml is deliberately absent: an SVG is a document that can fetch, and a model asked to "look at" one is being handed markup.