I will write and test the instructions for your custom gpt

Most custom GPTs fail in the same place. They work when you test them and drift the moment a real user phrases something sideways.

I write the instructions so that does not happen. That means telling the GPT what it is for, what it must refuse, what to do when the question is outside its knowledge, and what format the answer comes back in.

Then I test it. I write 30 to 50 questions, including the awkward ones people actually ask, run them through, and fix what breaks. You get that test set with the delivery, so when you change something later you can check nothing quietly broke.

Recent work: a custom GPT for SEO metadata with an eligibility gate and a QC checklist built in. The client stress-tested it for three days and left five stars.

Works for ChatGPT custom GPTs, Claude projects, and assistants built on the API. Send me what the GPT should do and who will use it, and I will tell you what it needs before you pay anything.