[BUG] /ultraplan session times out without applying changes — tokens consumed but no output

Preflight Checklist

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

What's Wrong?

/ultraplan starts a remote session, burns tokens generating a plan and editing files,
then times out before returning results to the local session. All work is lost.

The remote session log shows it was actively editing files (agent.py, main.py,
frontend components) but the session hit a timeout and none of the changes were
committed or sent back as a patch.

At the end of dialogue I see 'API Error: Stream idle timeout - partial response received' and 'Request timed out'.

What Should Happen?

Either:

1. The remote session should apply partial changes before timeout, or
2. The generated plan/diff should be returned even if execution was incomplete, or
3. The user should be warned that the task is too large before tokens are consumed

Steps to Reproduce:

1. Run /ultraplan with a large multi-file task (e.g. "add a new chart type + new

API endpoints + frontend UI changes across 5+ files")

1. Wait for the remote session to run (~5-10 minutes)
2. Session ends with "Request timed out"
3. Run git status — no files changed despite tokens being consumed

Error Messages/Logs

At the end of dialogue I see 'API Error: Stream idle timeout - partial response received' and 'Request timed out'.

Steps to Reproduce

1. Run /ultraplan with a large multi-file task (e.g. "add a new chart type + new

API endpoints + frontend UI changes across 5+ files")

1. Wait for the remote session to run (~15-20 minutes)
2. Session ends with "Request timed out"
3. Run git status — no files changed despite tokens being consumed

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.116

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_