[BUG] Fable 5 (claude-fable-5) not selectable — gates tengu_*_fable_5 false on Max plan

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?

Environment

• Claude Code CLI 2.1.218 (latest), macOS
• Auth: OAuth token · Plan: Max (5×)

Symptom

• /model fable (claude-fable-5) does not take effect — the session stays on the previous model.
• Opus 4.8, Sonnet 5, Haiku 4.5 all select and run fine. The issue is specific to Fable 5.

Diagnostic

• .claude.json shows the Fable 5 gates closed:
• "tengu_velvet_hammer_fable_5": false
• "tengu_velvet_mallet_fable_5": false
• "unpinFable5LaunchEffort": true
• Updated to the latest CLI, restarted, and re-authenticated (logout/login + model switch) — no change.
• Not a usage cap (Fable weekly usage ~19%).
• Secondary issue: /bug from the CLI returns 403 ("Couldn't send feedback") — reproducible, which is why this is filed here.

Question

Is Fable 5 still gated by rollout for Max accounts, or is this a bug? How can it be enabled?

What Should Happen?

I should be able to switch to fable 5 with my pro max account.

Error Messages/Logs

Steps to Reproduce

/model fable (claude-fable-5) does not take effect — the session stays on the previous model.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Code CLI 2.1.218

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_