[BUG] Unbearable/Unsafe (!) CLI jitter on Windows during multi-agent workflow

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?

There's a jitter, probably at 60fps. Not safe for the eyes.
It happens when a multi-agent thing happens.
Probably unoptimized updates on a per-agent stream basis instead of batch.

In addition to the jitter (which is what is unbearable and unsafe for the eyes, imo), it takes significantly more time to run via what it'd take if I ran it via a hook/MCP and another CLI instance that doesn't update -- or API.

What Should Happen?

My eyes should remain safe.

Error Messages/Logs

Steps to Reproduce

Simply init any multi-agent workflow. Jitter guaranteed.

A Plug & Play example is the official feature-dev plugin command.
https://github.com/anthropics/claude-code/tree/main/plugins/feature-dev

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.31 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

I am NOT using WSL.