solves: https://github.com/openai/codex/issues/5675 Block non-image uploads in the view_image workflow. We now confirm the file’s MIME is image/* before building the data URL; otherwise we emit a “unsupported MIME type” error to the model. This stops the agent from sending application/json blobs that the Responses API rejects with 400s. <img width="409" height="556" alt="Screenshot 2025-10-28 at 1 15 10 PM" src="https://github.com/user-attachments/assets/a92199e8-2769-4b1d-8e33-92d9238c90fe" />
codex-protocol
This crate defines the "types" for the protocol used by Codex CLI, which includes both "internal types" for communication between codex-core and codex-tui, as well as "external types" used with codex app-server.
This crate should have minimal dependencies.
Ideally, we should avoid "material business logic" in this crate, as we can always introduce Ext-style traits to add functionality to types in other crates.