support anthropic_beta as a top level parameter for anthropic on bedrock, support both string and array of strings to be compatible with anthropic signature

Author: narengogi

src/providers/bedrock/chatComplete.ts

@@ -43,13 +43,14 @@ export interface BedrockChatCompletionsParams extends Params {
 }
 
 export interface BedrockConverseAnthropicChatCompletionsParams
-  extends BedrockChatCompletionsParams {
+  extends Omit<BedrockChatCompletionsParams, 'anthropic_beta'> {
   anthropic_version?: string;
   user?: string;
   thinking?: {
     type: string;
     budget_tokens: number;
   };
+  anthropic_beta?: string | string[];
 }
 
 export interface BedrockConverseCohereChatCompletionsParams
@@ -717,7 +718,9 @@ export const BedrockConverseAnthropicChatCompleteConfig: ProviderConfig = {
       transformAnthropicAdditionalModelRequestFields(params),
   },
   anthropic_beta: {
-    param: 'anthropic_beta',
+    param: 'additionalModelRequestFields',
+    transform: (params: BedrockConverseAnthropicChatCompletionsParams) =>
+      transformAnthropicAdditionalModelRequestFields(params),
   },
 };
 

src/providers/bedrock/utils.ts

@@ -120,6 +120,15 @@ export const transformAnthropicAdditionalModelRequestFields = (
   if (params['thinking']) {
     additionalModelRequestFields['thinking'] = params['thinking'];
   }
+  if (params['anthropic_beta']) {
+    if (typeof params['anthropic_beta'] === 'string') {
+      additionalModelRequestFields['anthropic_beta'] = [
+        params['anthropic_beta'],
+      ];
+    } else {
+      additionalModelRequestFields['anthropic_beta'] = params['anthropic_beta'];
+    }
+  }
   return additionalModelRequestFields;
 };