fix: simplify getApiProtocol function to remove vertex/bedrock special handling

Author: daniel-lxs

packages/types/src/provider-settings.ts

@@ -303,23 +303,7 @@ export const getModelId = (settings: ProviderSettings): string | undefined => {
 // Providers that use Anthropic-style API protocol
 export const ANTHROPIC_STYLE_PROVIDERS: ProviderName[] = ["anthropic", "claude-code"]
 
-// Helper function to determine API protocol for a provider and model
-export const getApiProtocol = (provider: ProviderName | undefined, modelId?: string): "anthropic" | "openai" => {
-	// First check if the provider is an Anthropic-style provider
-	if (provider && ANTHROPIC_STYLE_PROVIDERS.includes(provider)) {
-		return "anthropic"
-	}
-
-	// For vertex and bedrock providers, check if the model ID contains "claude" (case-insensitive)
-	if (
-		provider &&
-		(provider === "vertex" || provider === "bedrock") &&
-		modelId &&
-		modelId.toLowerCase().includes("claude")
-	) {
-		return "anthropic"
-	}
-
-	// Default to OpenAI protocol
-	return "openai"
+// Helper function to determine API protocol for a provider
+export const getApiProtocol = (provider: ProviderName | undefined): "anthropic" | "openai" => {
+	return provider && ANTHROPIC_STYLE_PROVIDERS.includes(provider) ? "anthropic" : "openai"
 }