[Bug] Claude Code overrides Windows Terminal cursor shape and blink settings

Bug Description
Title: Claude Code overrides Windows Terminal cursor settings (shape / blink) Environment: - OS: Windows - Terminal: Windows Terminal - Shell: PowerShell - Claude Code TUI mode: fullscreen ("tui": "fullscreen" in settings.json) Summary: Claude Code does not inherit the cursor configuration from my Windows Terminal profile. My profile defines a specific cursorShape (and blink behavior), but once Claude Code starts, the cursor inside the input box is rendered with a different shape/blink state. The terminal-side settings only take effect again after Claude Code exits. Expected behavior: Claude Code should respect the host terminal's cursor configuration unless the user explicitly opts into a custom cursor style. At minimum, there should be a way to prevent Claude Code from emitting DECSCUSR (or equivalent) escape sequences that override the terminal's cursor. Actual behavior: The input box (and possibly other UI elements) appears to send cursor-shape escape sequences that override Windows Terminal's cursorShape / cursor-height / blink settings for the duration of the session. Reproduction: 1. Configure a non-default cursor shape (e.g. filledBox or vintage) and/or blink in a Windows Terminal profile. 2. Launch Claude Code in that profile (fullscreen TUI mode). 3. Observe that the cursor shown by Claude Code does not match the profile's setting. Requested feature: Add an opt-out, e.g.: - An environment variable such as CLAUDE_CODE_PRESERVE_CURSOR=1, or - A settings.json key such as "preserveTerminalCursor": true so that Claude Code leaves the terminal's native cursor configuration untouched. Why it matters: Users who carefully tune their terminal cursor (for visibility, accessibility, or aesthetic reasons) lose those settings whenever Claude Code is the foreground application — which, for heavy users, is most of the day.

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.119
• Feedback ID: f860ffb2-1366-4282-bbd8-2d2d9b183289

Errors

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