[FEATURE] Enable commands to be run in sub-directories

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

For a project with both frontend and backend, I usually open claude in their parent folders, like:
meta-folder -> 'frontend', 'backend'

FE and BE are git repo but meta-folder is not. I want to be able to run commands like /pr-comments in one of the dir directly

Proposed Solution

I'd like something like @backend /pr-comments

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_