[BUG] Native file picker opens on Enter key press, blocking all input (macOS)

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?

When I type a message in Claude Code and press Enter to submit, a native macOS file selection dialog (Finder-style "Open" window) pops up over the input box instead of submitting my message. This happens every time — I can't get past it to send anything. Restarting the app doesn't fix it; the dialog reappears on the next Enter press.

<img width="639" height="416" alt="Image" src="https://github.com/user-attachments/assets/ce6d1cd5-5510-4457-a9b9-d67251148499" />

What Should Happen?

Pressing Enter should submit my message normally. No file dialog should appear.

Error Messages/Logs

No error text or console output observed — just the native file picker dialog appearing. (Screenshot attached.)

Steps to Reproduce

Open Claude Code on macOS
Type any message in the input box
Press Enter
A native "Open" file dialog appears instead of the message submitting

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

unknown- issue started when i logged in under business account

Claude Code Version

Claude 1.37937.1 (edbd3c) 2026-08-25T22:55:59.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_