[Bug] Built-in `/bug` command intercepted by user-defined skills in remote sessions

Bug Description
[Bug] Built-in /bug command intercepted by user-defined skills

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BUG REPORT
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Title: Built-in /bug command triggers user-defined skill instead of built-in behavior

Description:
When typing /bug in a remote control session, instead of being treated as a built-in CLI command, it triggers a user-defined skill (in this case "flux-and-fate"). The /bug command should be recognized as a built-in command and not intercepted by the skill system.

Steps to reproduce:

1. Define a project-level skill in .claude/commands/
2. Connect via /remote-control
3. Type /bug in the remote control session
4. A user-defined skill is invoked instead of the built-in /bug command

Expected behavior: Built-in commands like /bug should not be overridden or intercepted by user-defined skills, regardless of whether the session is local or remote.

Environment: Windows 11, Claude Code CLI