Feature request: setting to hide individual built-in slash commands from the menu

Description

There's currently no way to hide individual built-in slash commands from the slash-command menu. skillOverrides and disableBundledSkills only affect skills, not built-in commands.

Concrete pain point: /usage and /usage-credits sit adjacent in the menu, and it's easy to accidentally trigger /usage-credits when intending to check usage. I never use /usage-credits and would like to hide it entirely.

Proposed solution

A settings.json option for granular control over built-in command visibility, e.g.:

{
  "commandOverrides": {
    "usage-credits": "hidden"
  }
}

Environment

• Platform: macOS (Darwin 25.5.0)
• Claude Code CLI

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