Built-in /remote-control command not recognized in projects with .claude/skills/ directory

Description

/remote-control works in projects without a .claude/skills/ directory but returns Unknown skill: remote-control in projects that have one.

Reproduction

1. Create a project with .claude/skills/ containing custom skills
2. Run claude and type /remote-control
3. Result: Unknown skill: remote-control

1. In a different project without .claude/skills/, run claude and type /remote-control
2. Result: Works correctly, generates session URL

Environment

• Claude Code v2.1.72
• Windows 11 Pro
• Both projects on the same machine, same account

Expected behavior

Built-in CLI commands like /remote-control should take precedence over (or coexist with) custom skill resolution regardless of project structure.