How to get tool_result in stream?

[livoras]

import { claude } from '@instantlyeasy/claude-code-sdk-ts';

async function main() {
  const prompt = "Use bash to echo Hello"
  
  const response = await claude()
    .withModel('claude-sonnet-4-20250514')
    .skipPermissions()
    .query(prompt)
    .stream(async (message) => {
      console.log("----------------------------------------", prompt, "-----------------------------------------")
      console.dir(message, { depth: null })
    });
  
  console.log(response);
}

main();

Result

---------------------------------------- Use bash tool to echo Hello World -----------------------------------------
{
  type: 'assistant',
  content: [
    {
      type: 'tool_use',
      id: 'toolu_01Cs4pQMaSyTVkmis338ppeM',
      name: 'Bash',
      input: {
        command: 'echo "Hello World"',
        description: 'Echo Hello World to console'
      }
    }
  ],
  session_id: 'a1898fef-d554-4961-b618-a9e173cb0faa'
}
---------------------------------------- Use bash tool to echo Hello World -----------------------------------------
{
  type: 'assistant',
  content: [ { type: 'text', text: 'Hello World' } ],
  session_id: 'a1898fef-d554-4961-b618-a9e173cb0faa'
}
---------------------------------------- Use bash tool to echo Hello World -----------------------------------------
{
  type: 'result',
  subtype: 'success',
  content: '',
  session_id: 'a1898fef-d554-4961-b618-a9e173cb0faa',
  usage: {
    input_tokens: 11,
    cache_creation_input_tokens: 1834,
    cache_read_input_tokens: 49394,
    output_tokens: 84,
    server_tool_use: { web_search_requests: 0 },
    service_tier: 'standard'
  },
  cost: { total_cost: undefined }
}

There is a content type named 'tool_result', but actually never see any tool use results in stream callback. How can I get a tool use result after a tool is finished.

[livoras]

Seems the tool_result has been moved to type: "user" message according to the newest official api returns.

{
  type: "user",
  message: {
    role: "user",
    content: [
      {
        tool_use_id: "toolu_015us2rT5CuPBwPNkKNhKTDr",
        type: "tool_result",
        content: "Hello",
        is_error: false,
      }
    ],
  },
  parent_tool_use_id: null,
  session_id: "e79f62f2-76a3-42b5-af05-d3d5f61d1ffe",
}
...

But

https://github.com/instantlyeasy/claude-code-sdk-ts/blob/main/src/_internal/client.ts

...
  private parseMessage(output: CLIOutput): Message | null {
    // Handle CLIOutput types based on actual CLI output
    switch (output.type) {
      case 'assistant': {
        // Extract the actual assistant message from the wrapper
        const assistantMsg = output as CLIAssistantOutput;
        if (assistantMsg.message) {
          // Return a simplified assistant message with just the content
          return {
            type: 'assistant',
            content: assistantMsg.message.content,
            session_id: assistantMsg.session_id
          } as AssistantMessage;
        }
        return {
          type: 'assistant',
          content: [],
          session_id: assistantMsg.session_id
        } as AssistantMessage;
      }
        
      case 'system':
        // System messages (like init) - skip these
        return null;
        
      case 'result': {
        // Result message with usage stats - return it
        const resultMsg = output as any; // Type assertion for now
        return {
          type: 'result',
          subtype: resultMsg.subtype,
          content: resultMsg.content || '',
          session_id: resultMsg.session_id,
          usage: resultMsg.usage,
          cost: {
            total_cost: resultMsg.cost?.total_cost_usd
          }
        } as Message;
      }
        
      case 'error': {
        const errorOutput = output as CLIErrorOutput;
        const errorMessage = errorOutput.error?.message || 'Unknown error';
        const errorType = detectErrorType(errorMessage);
        throw createTypedError(errorType, errorMessage, errorOutput.error);
      }
      
      default:
        // Skip unknown message types
        return null;
    }
  }
}

only processes type: "assistant". That might be the reason.

[livoras]

livoras@c9a8ab1

I created a fix. It works for me. I will create a PR if it's the right way to fix.