Support slash command autocomplete when '/' is typed mid-prompt

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?

Requesting reopen. Closing this as "not planned" assumes the trigger is a convenience. It is the only discovery surface for skills. With 50+ installed I cannot recall exact names or hyphenation, so gating the picker to position 0 means anything after the first token is unreachable in practice — even though mid-prompt commands still execute (#44488). The ask is small: match /[\w-]* at any cursor position preceded by start-of-input or whitespace, and open the existing dropdown. No behaviour change to execution, no new UI.

What Should Happen?

/ bring up global skills at any time during prompt. As they always did.

Error Messages/Logs

Steps to Reproduce

Open Claude app
Toggle to Code Mode

Anywhere inside composer box that is not the first cursor position does not allow you to call upon skill library by pressing "/" as it always did.

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

1.34493.1

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_