claude-code - 💡(How to fix) Fix [BUG] Ultraplan issue: API Error - Stream idle timeout - partial response received [1 participants]

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anthropics/claude-code#48032Fetched 2026-04-15 06:35:16
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Error Message

API Error: Stream idle timeout - partial response received

Error Messages/Logs

RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

This message appeared when I used ultraplan: Let me write the plan file. API Error: Stream idle timeout - partial response received

What Should Happen?

At least it should show me the final plan instead.

Error Messages/Logs

Steps to Reproduce

Just used /ultraplan

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

2.1.107

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The "Stream idle timeout - partial response received" error when using ultraplan may be resolved by adjusting the API timeout settings or checking the Anthropic API status.

Guidance

  • Verify the Anthropic API status to ensure it's not experiencing any outages or maintenance that could cause the timeout.
  • Check if there are any configuration options in Claude Code to increase the API timeout, which might help prevent the stream idle timeout.
  • Consider reaching out to the Anthropic API support to see if there are any known issues with their service that could be causing the partial response.
  • If this is a regression, comparing the current version (2.1.107) with the previous working version might help identify the change that introduced the issue.

Example

No specific code example can be provided without more details on the Claude Code configuration or the Anthropic API.

Notes

The lack of information about the Last Working Version and Additional Information limits the ability to provide a more precise fix. The solution might depend on specific settings or environment configurations not mentioned in the issue.

Recommendation

Apply workaround: Adjusting the API timeout settings or checking the Anthropic API status might mitigate the issue until a more permanent fix is found.

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