Method resolveModelRef

pkg/runtime/model_switcher.go:412–433

resolveModelRef resolves a model reference to a single provider. The reference can be a named model from the config or an inline "provider/model" spec (e.g. "openai/gpt-4o-mini").

(ctx context.Context, modelRef string)

// The reference can be a named model from the config or an inline
// "provider/model" spec (e.g. "openai/gpt-4o-mini").
func (r *LocalRuntime) resolveModelRef(ctx context.Context, modelRef string) (provider.Provider, error) {
	if r.modelSwitcherCfg == nil {
		return nil, errors.New("model switching not configured for this runtime")
	}

	// Try named model from config first.
	if modelCfg, exists := r.modelSwitcherCfg.Models[modelRef]; exists {
		if isAlloyModelConfig(modelCfg) {
			return nil, fmt.Errorf("model reference %q is an alloy (multi-model) config and cannot be used as a single model override", modelRef)
		}
		modelCfg.Name = modelRef
		return r.createProviderFromConfig(ctx, &modelCfg)
	}

	// Try inline "provider/model" format.
	inlineCfg, err := latest.ParseModelRef(modelRef)
	if err != nil {
		return nil, fmt.Errorf("invalid model reference %q: expected a model name from config or 'provider/model' format", modelRef)
	}

	return r.createProviderFromConfig(ctx, &inlineCfg)
}

// isAlloyModelConfig checks if a model config is an alloy model (multiple models).
func isAlloyModelConfig(cfg latest.ModelConfig) bool {