[BUG] Remapping 'enter' → 'chat:newline' in keybindings.json doesn't suppress default submit; newline persists into next prompt's input buffer

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?

After keybinding that binds Enter to newline is added, pressing Enter in the input field still triggers 'send' of the input content with newline added. The content (with newline added) remains in the input field (the field does not get cleared as happens without the altered keybinding after 'enter' is pressed).
keybindings.json:
{ "bindings": [{ "context": "Chat", "bindings": { "enter": "chat:newline", "ctrl+j": "chat:submit" } }]

What Should Happen?

Enter inserts newline only; Ctrl+J submits

Error Messages/Logs

Steps to Reproduce

1. Create a key bindings file (~/.claude/keybindings.json) with content:

{ "bindings": [{ "context": "Chat", "bindings": { "enter": "chat:newline", "ctrl+j": "chat:submit" } }]

1. start claude
2. write any prompt and hit 'Enter' key

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.85

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_