fix: update claude version with response handling correction

utils/anthropic/client.ts

@@ -1,5 +1,5 @@
 import Anthropic from '@anthropic-ai/sdk';
-import { BaseTool } from './tool';
+import { BaseTool, ToolUseBlock } from './tool';
 
 export async function getMessage<T>(text: string, tool: BaseTool) {
   const anthropic = new Anthropic({
@@ -9,7 +9,7 @@ export async function getMessage<T>(text: string, tool: BaseTool) {
   console.info('Anthropic request with text: ', text);
 
   const response = await anthropic.messages.create({
-    model: 'claude-3-5-sonnet-20241022',
+    model: 'claude-sonnet-4-0',
     max_tokens: 2048,
     messages: [{ role: 'user', content: text }],
     tools: [tool]
@@ -18,12 +18,15 @@ export async function getMessage<T>(text: string, tool: BaseTool) {
   console.info('Anthropic response: ', response);
 
   try {
-    const data = response.content as [
-      { type: string; text: string },
-      { type: string; input: object }
-    ];
+    const content = response.content;
 
-    return data[1].input as T;
+    const toolUse = content.find((block): block is ToolUseBlock => block.type === 'tool_use');
+
+    if (!toolUse) {
+      throw new Error('No tool_use block found in response');
+    }
+
+    return toolUse.input as T;
   } catch (error) {
     throw Error(JSON.stringify(error));
   }

utils/anthropic/tool.ts

@@ -8,6 +8,13 @@ export interface BaseTool {
   };
 }
 
+export type ToolUseBlock = {
+  type: 'tool_use';
+  id: string;
+  name: string;
+  input: Record<string, any>;
+};
+
 export interface NewsletterTool {
   title: string;
   content: string;