Authentication flow

[bnjjj]

I didn't find details in docs about the authentication flow, an example on how it would work. For example I would like to check if a token is already saved in a file and if not I'm throwing a auth required error. But now I don't know how can I do to provide this token using acp client (zed) and save it into the file.

Could you help me ?

[benbrandt]

Hi @bnjjj it depends on what you need. We currently have some special cases for Gemini and Claude Code
Codex we can do completely from the agent side because of how their auth works.

Overall this is an area I would like to expand in the protocol to allow the client to capture information from the user and provide it back to the agent, but this isn't supported yet

[cmoulliard]

This is certainly an area where improvements/standardizations are needed as by example when we use the agent opencode, then we got as response for the authentication part of the initialization response the following auth methods which is nothing more than a command to be executed
in a terminal

Auth methods: [AuthMethodAgent[id=opencode-login, name=Login with opencode, description=Run `opencode auth login` in the terminal]]

Remark: such an auth mode is even not needed if by example the user sets different env variable to use as provider: Vertex AI with opencode

export GOOGLE_APPLICATION_CREDENTIALS="$home/.config/gcloud/application_default_credentials.json"
export VERTEXAI_LOCATION="location"
export VERTEXAI_PROJECT="google-project"