[Feature Request] Support reading context files from external repositories

Bug Description
when I use claude runned inside repo A, it does not use CLAUDE.md from repo B when I ask it to change files for repo B from repo A. Sometimes it is not convenient to use another Claude Code instance from repo B and easier to ask to change from repo A, especially when the changes are close between repo A and B.

Environment Info

• Platform: linux
• Terminal: tmux
• Version: 2.1.32
• Feedback ID: 72511237-036d-498e-9acd-88dfe30cc90a

Errors

[]