Issue with orpheus adding @mentions to haiku

<img width="371" height="122" alt="Image" src="https://github.com/user-attachments/assets/bf224d3f-0dd6-4689-8921-2c949c70a99c" />

<img width="748" height="198" alt="Image" src="https://github.com/user-attachments/assets/022a31fa-c45b-4100-9c65-9f194a8f42a6" />

Orpheus Slack bot is unable to add mentions into haiku, as shown by the images above.