[BUG] Skill override "off" in settings.json does not prevent skill from being available/invocable

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Setting a skill to "off" in skillOverrides within ~/.claude/settings.json does not disable the skill. The skill still appears in the available skills list in system-reminder and can be invoked via /skill-name.

What Should Happen?

Skill should not appear in the available skills list in system-reminder

• Invoking /skill-name should fail or indicate the skill is disabled

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce:

1. Add a skill override to ~/.claude/settings.json:

{
"skillOverrides": {
"skill-name": "off"
}
}

1. Start a new Claude Code session
2. Observe that skill-name still appears in the available skills list
3. Type /skill-name— the skill executes instead of being blocked

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

v2.1.123

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_