[Bug] Claude 4.8 Opus hallucinating tool outputs without execution

Bug Description
opus 4.8 is lying and fabricating a lot of things without doing actual work. only after i press it multiple times on whether its correct then it admits that its lying.

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.156
• Feedback ID: 844dc9d2-42da-481e-a89e-31b3171fc111

<img width="1876" height="267" alt="Image" src="https://github.com/user-attachments/assets/9b4fdebd-9e85-49d7-8fcc-1aae88924272" />