If a skill exists, the assistant should not offer to create a skill.

How to reproduce:

1) Create a skill
2) Invoke it a few times

-> Assistant asks you to create a skill.

<img width="529" height="236" alt="Image" src="https://github.com/user-attachments/assets/7d3bc0be-393c-42c5-a451-94c15f5bb58e" />