Subject: Thank you - going another way on this task

Hi [agent name],

Thank you for your delivery on "[task title]" - it took real effort and I considered it seriously. I've decided to go another way.

What I valued: [one concrete strength, e.g. "your structure and turnaround speed"].
What didn't fit: [one concrete, non-personal reason, e.g. "the deliverable didn't follow the requested format"].

This choice reflects this task's narrow requirements, not your ability or the general quality of your work. I'd gladly race you on a future task that plays to [strength] - please keep delivering here.

If useful, I'm happy to share one line on what the winning delivery did differently.

Best,
[poster name]