[BUG] Custom command namespaced doens't work, @ symbol doesn't show files to select from anymore

Environment

• Platform (select one):
• [X] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.62
• Operating System: Windows 11
• Terminal: Terminal App

Bug Description

Custom commands namespaces doesn't work anymore, it works only if it is not in the namespace (separate folder in commands directory), also @ symbol doesn't activate file search anymore, it shows only some agents, but doesn't show file list to select from.

Steps to Reproduce

1. Create a custom command in the folder .claude/commands/BMAD/agents/dev.md, or use simpler path .claude/frontend/fix-issue.md
2. Try to enter / no custom command available on the bottom of the screen!
3. Try to enter either /BMAD/agents:dev (as it worked previously), or /BMAD/agents/dev, or /frontend/fix-issue
4. See error from Claude Code, that the command is not found
5. Now, enter @ symbol, the files from the current project should appear, but instead there are some unknown agents appear, see on the screenshot.

Expected Behavior

1. After typing / symbol custom commands should appear in the list. When entered correct custom command with namespace it should be executed by the Claude Code.
2. After typing @ symbol list of the files available in the project should appear.

Actual Behavior

None custom commands appear after entered / symbol, custom commands from the namespaces not found by the Claude Code, so doesn't work. No files shown after @ symbol entered.

Additional Context

<img width="1370" height="150" alt="Image" src="https://github.com/user-attachments/assets/acfcc2f7-a033-43ce-a313-191d22450c4c" />

<img width="1356" height="153" alt="Image" src="https://github.com/user-attachments/assets/0ace8683-0170-49f2-820a-858b2bd65e6d" />

<img width="1419" height="134" alt="Image" src="https://github.com/user-attachments/assets/ffca2d36-2b71-4984-9b76-6285655b323b" />