Models

The model catalog is provider-first: model ids are provider-specific namespaces (Bedrock ids like us.anthropic.claude-sonnet-4-6 mean nothing to a subscription-backed provider, and vice versa), so each provider group lists what it offers and marks its own default.

agentSandbox.agent.availableModels = {
  goose = {
    "us.anthropic.claude-sonnet-4-6" = { default = true; hint = "Fast + cheap."; };
    "us.anthropic.claude-opus-4-8"  = { hint = "Slow + powerful."; };
  };
  byoc."claude-sonnet-4-5" = { default = true; hint = "The user's own subscription."; };
};

• A run only ever receives a model its provider can serve — the conversation's choice when that provider offers it, else that provider's default. A Bedrock id never reaches a bring-your-own container.
• The agent picks its own model via the list_models / switch_model tools, steered by your hints; the UI and management API can override per conversation.
• Providers: goose (Bedrock), claude-code (in-cluster subscription SDK), byoc (the user's own container).