[Bug] Model downgraded to Opus during security checks blocking security vulnerability analysis

[iraabbott]

Bug Description
Fable downgraded to Opus when running a security check. It is one thing to block attempts to subvert security, it is another to block telling me how to fix security holes unless the goal is leave security holes intentionlly out there.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.175
• Feedback ID: f97fe2a7-f9c9-42e7-abe5-498cbc5b046f

Errors

[]

[github-actions]

Found 3 possible duplicate issues:

1. [Bug] Claude model auto-switches from selected model during security vulnerability analysis #68053
2. [Bug] Model downgrade blocks legitimate security auditing workflows #66826
3. [Bug] Fable 5 safety classifier false-positives on authorized defensive security audits #66697

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