Claude Desktop and Fable 5.1 safeguards are still terrible, RT shader work in UnrealEngine flagged as [cybersecurity] work, and dropped to Opus 4.8

A user reported that Claude Desktop and Fable 5.1 safeguards are still problematic, flagging "RT shader work in UnrealEngine" as "[cybersecurity] work." The user, who re-subscribed to try Fable 5.1, found its implementation terrible compared to Astra and noted no issues when using Fable 5.1 in Cursor for the same task, suggesting the problem lies with Anthropics' own safeguard implementation. The system was also reportedly dropped to Opus 4.8.

This report highlights a critical flaw in Anthropics' safeguard implementation for Fable 5.1, unlike the seamless experience with Astra or Fable 5.1 within Cursor.