Ctrl+B Keybinding Conflict on macOS

Issue Description

The Ctrl+B hotkey for running background commands in Claude Code conflicts with the default macOS terminal keybinding for moving the cursor backward by one character.

Problem Details

• Claude Code Version: 1.0.71+ (feature introduced in 1.0.71)
• Platform: macOS
• Conflicting Keybinding: Ctrl+B is a standard Unix/macOS terminal keybinding for backward cursor movement
• Expected Feature: Run Bash commands in background while Claude continues working

Impact

macOS users cannot use the background command feature as the system intercepts Ctrl+B for cursor navigation, preventing Claude Code from receiving the keystroke.

Reproduction Steps

1. Open Claude Code on macOS
2. Try to use Ctrl+B to run a command in background
3. Observe that cursor moves backward instead of triggering background execution

Suggested Solutions

1. Add configurable keybindings: Allow users to customize the background command hotkey through settings.json
2. Use different default on macOS: Detect macOS and use an alternative default keybinding (e.g., Cmd+B, Ctrl+Shift+B)
3. Multiple keybinding options: Support multiple keybindings for the same action

References

• Apple Support: Mac keyboard shortcuts
• Claude Code v1.0.71 release notes mentioning the Ctrl+B feature

Workaround

Currently, there is no workaround as keybindings are hardcoded and not configurable.