[Bug] Model downgrade from Claude Fable to Opus during security implementation tasks

Bug Description
Will you please do something to fix the model dropping from Fable to Opus on writing a new application when it gets anywhere near a cybersecurity fix or adjustment.. My application is for a home services business and I need security to secure the app.. what this is doing is absolutely ridiculous.. it is steering real work away from the model which is most capable to PREVENT hackers from being able to break into a legitimate appllication... this isn't the first time.. I bet CODEX doesn't do this. I bet gemma 4 and qwen plus all the other open source models don't do this.. you're going to hurt your own customers abilities to deliver real secure applications

Environment Info

• Platform: win32
• Terminal: cursor
• Version: 2.1.214
• Feedback ID: 4b13c2f5-e13d-454b-b6f3-1fae9fd7220c

Errors

[{"error":"TelemetrySafeError: VirtualMessageList: itemKeys/messages length desync (keys=116 messages=115 range=[92,116))\n    at hob (B:/~BUN/root/src/entrypoints/cli.js:13253:8188)\n    at Rjp (B:/~BUN/root/src/entrypoints/cli.js:13253:1103)\n    at Xn (B:/~BUN/root/src/entrypoints/cli.js:2598:21391)\n    at XE (B:/~BUN/root/src/entrypoints/cli.js:2598:40495)\n    at nj (B:/~BUN/root/src/entrypoints/cli.js:2598:51434)\n    at Fje (B:/~BUN/root/src/entrypoints/cli.js:2598:89101)\n    at $je (B:/~BUN/root/src/entrypoints/cli.js:2598:88051)\n    at lDe (B:/~BUN/root/src/entrypoints/cli.js:2598:87870)\n    at dU (B:/~BUN/root/src/entrypoints/cli.js:2598:84132)\n    at Pt (B:/~BUN/root/src/entrypoints/cli.js:2598:6680)","timestamp":"2026-07-19T16:10:06.297Z"}]