--provider flag to gateway run.
The Offered column is about creating a new Agent. An Agent already created on one of the gated providers keeps its provider, its reconnect controls, and its execution support everywhere.
Follow Bring your own agent for the full setup. Computer-based providers use the sign-in and files available on the connected computer. Devin Cloud runs through Cognition’s cloud API.
ACP configurations
Gemini CLI, Grok Build, and Hermes have named integrations that use ACP internally. Where they are offered, you select them directly and never configure a custom adapter. Custom (ACP) connects any agent that speaks the Agent Client Protocol over stdio. It is enabled for a workspace on request rather than offered by default, and development environments always have it. Once enabled, ACP setup covers the launch command; Bring an ACP agent covers what the agent itself must implement. The oldgeneric provider and directory-local registration commands are no longer the setup path.