Agent view: high-rate terminal flicker in Windows Terminal (cmd.exe profile) while Claude is actively streaming

Environment

• OS: Windows 11 Home Single Language (10.0.26200)
• Terminal: Windows Terminal, Command Prompt (cmd.exe) profile
• Claude CLI: 2.1.144

Description

In the claude agents view, after drilling into a conversation, the terminal flickers/redraws at a very high rate for the entire duration that Claude is active (processing/streaming a turn). The flicker stops and the screen settles as soon as Claude goes idle. It recurs on every subsequent prompt.

Steps to reproduce

1. Launch Claude CLI on Windows 11 in Windows Terminal (Command Prompt profile)
2. Open claude agents view and drill into a conversation
3. Submit any prompt
4. Terminal flickers continuously while the turn is active; settles once Claude is idle

Expected behavior

Stable rendering during streaming.

Actual behavior

Rapid full-screen flicker for the whole active turn.

Notes

• Flicker duration correlates exactly with Claude's active/streaming state — this strongly suggests excessive full-screen redraws during the streaming render loop (spinner animation / output diffing) rather than a one-off resize glitch.
• The 2.1.144 release notes mention reducing VS Code rendering glitches "by reducing spinner animation color count" and other Windows Agent View fixes — this looks like the same class of issue, currently unaddressed for Windows Terminal with the cmd.exe profile.