[BUG]

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?

Input history navigation cannot be disabled — mouse scroll clobbers typed input

Problem

The in-session input history (up/down arrow cycling through previous prompts) cannot be disabled. This causes several UX problems:

1. Mouse scroll triggers history navigation — scrolling the mouse wheel (or trackpad) sends arrow key events that cycle through previous inputs, clobbering whatever is currently typed
2. Screen resizes during history cycling — previous entries of different lengths cause the input area to resize, losing visual context
3. No setting to disable it — "history": false in ~/.claude/settings.json only controls session transcript persistence, not in-session input history navigation

Expected behavior

There should be a setting (e.g., "inputHistory": false) to disable in-session input history navigation entirely, so that up/down arrows only move the cursor within multiline input.

Environment

• Claude Code CLI (terminal)
• macOS (Darwin 24.6.0)
• Shell: zsh
• Terminal: mac console in tmux session

Workaround

None found. The "history": false setting does not affect this behavior.

What Should Happen?

Expected behavior

There should be a setting (e.g., "inputHistory": false) to disable in-session input history navigation entirely, so that up/down arrows only move the cursor within multiline input.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code CLI in a terminal
2. Send a few prompts (so there is input history to cycle through)
3. Start typing a new prompt
4. Scroll the mouse wheel or trackpad while the cursor is in the input area
5. Observe: the typed text is replaced by a previous prompt from history
6. Also observe: the input area resizes to fit the historical entry, causing the screen to jump

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.92

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_