I appreciate you sharing this, but I need to clarify: this appears to be about Fable (a programming language) and vehicle ECU parameters, which is unrelated to Claude Code (Anthropic's CLI tool for coding with Claude). If you're experiencing an issue with
Status Open
Reported on v2.1.263
Maintainer reply None cached
Activity 0 comments · opened Sep 6, 2026
Bug Description
I uploaded my vehicle's ECU database to decode its PIDs. I have been using Fable 5.1 for this purpose with success. However, the last time I uploaded this data, a safeguard flag was triggered. I had been using Fable 5.0 for this purpose for months without any issues.
Environment Info
- Platform: linux
- Terminal: ghostty
- Version: 2.1.263
- Feedback ID: 205e0673-5d03-4280-b77e-ab7abb2c3f76
Errors
Fable 5.1's safeguards flagged this message. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate coding, cybersecurity, and biology tasks. Switched to Opus 4.8. Send feedback with /feedback or learn more
Details: [cyber]
⎿ Tip: You can configure model switch behavior in /config