[Bug] Locked out of Fable 5 after transcript revision with setup issues

Bug Description
I have been using Fable 5 (I even allowed transcript revision) and suddenly I'm locked out
$ claude
▐▛███▜▌ Claude Code v2.1.177
▝▜█████▛▘ Fable 5 with xhigh effort · Claude Max
▘▘ ▝▝ ~/repos/termius

⚠ 5 setup issues: MCP · /doctor

❯ /doctor
⎿ Claude Code diagnostics dismissed

❯ Test

Environment Info

• Platform: linux
• Terminal: xterm-256color
• Version: 2.1.177
• Feedback ID: 118c8950-6ea8-45f7-a77f-8c04af6aa31b

Errors

[{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzSHT8SV5Uvw3rYAawG3\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67544)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:03:00.100Z"}]