Daily 5 product ideas for print-on-demand (DTF) merch

First run (or whenever the offer brief is missing): ask the user on Slack what they want to offer — product types, niche/theme + audience, and brand style do's & don'ts — and save it to the brain; do NOT generate anything until the brief is answered. Then each day generate 5 NEW, non-duplicate product ideas matching the brief — product type, design concept, on-product copy/art direction, and a mockup where a print-on-demand tool is connected — and post them to the chosen Slack channel, inviting feedback. Ideas only: never create, price, or publish a live product.