[BUG] Slash command autocomplete no longer works mid-message (normal mode)

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?

Slash command/skill autocomplete suggestions no longer appear when typing / in the middle of a message. Autocomplete only triggers when / is at the very beginning of the input.

What Should Happen?

Typing / mid-message should show autocomplete suggestions for available slash commands and skills, as documented in the CHANGELOG ("slash command autocomplete support when / appears
anywhere in input").

Error Messages/Logs

None - no error, the autocomplete dropdown simply doesn't appear.

Steps to Reproduce

1. Ensure vim mode is disabled (run /vim - it should show "Editor mode set to normal")
2. Start typing a message, e.g.: I want to
3. Type / to trigger autocomplete for a slash command
4. Observe: no autocomplete dropdown appears
5. For comparison: clear input and type / at the start - autocomplete works correctly

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Unknown - noticed after recent update, I guess previous

Claude Code Version

2.0.61 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

Same issue with Ghostty