chore(internal): update resource client type (#263)

src/resource.ts

@@ -1,11 +1,11 @@
 // File generated from our OpenAPI spec by Stainless.
 
-import type { Anthropic } from './index';
+import * as Core from '@anthropic-ai/sdk/core';
 
 export class APIResource {
-  protected _client: Anthropic;
+  protected _client: Core.APIClient;
 
-  constructor(client: Anthropic) {
+  constructor(client: Core.APIClient) {
     this._client = client;
   }
 }

src/resources/beta/messages.ts

@@ -40,7 +40,7 @@ export class Messages extends APIResource {
    * Create a Message stream
    */
   stream(body: MessageStreamParams, options?: Core.RequestOptions): MessageStream {
-    return MessageStream.createMessage(this._client.beta.messages, body, options);
+    return MessageStream.createMessage(this, body, options);
   }
 }