Fable 5 not appearing in CLI model picker — policy-limits.json has allow_cobalt_plinth: false

Environment

• Claude Code version: 2.1.170
• OS: macOS (Darwin 25.4.0)
• Account type: Personal Stripe subscription

Problem

Fable 5 does not appear in the /model picker in the CLI, even after upgrading to 2.1.170 which is listed as the required version for Fable 5 access.

What I've tried

• Upgraded to 2.1.170 ✅
• Full restart of Claude Code ✅
• Removed explicit model pin from settings.json (was "model": "opus[1m]") ✅

Observations

1. Fable 5 is visible on claude.ai web with the same account
2. Other users on the same CLI version can see Fable 5 in the model picker
3. ~/.claude/policy-limits.json contains the following server-pushed restriction:

{
  "restrictions": {
    "allow_cobalt_plinth": {
      "allowed": false
    }
  }
}

1. When this file is manually edited to "allowed": true, Claude Code reverts it back to false on restart — confirming it is server-controlled and cannot be overridden client-side.

Expected behavior

Fable 5 should appear in the CLI model picker for accounts that can access it on the web.

Question

Is allow_cobalt_plinth related to Fable 5 CLI availability? If so, can this restriction be lifted for this account?