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Including an example of the shape of your tags helps the model produce a more useful hallucinated guess.

The prompt should include an example of the tag format — like hierarchical product classifications such as 'Furniture / Living Room Furniture / Coffee Tables' — so the model's imagined tags look right. ✦ AI generated

the author · Simon Willison's Weblog · 2026-08-14 · original ↗

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His example prompt suggests including an example of the shape of your tags to help the model make a more useful guess.

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◉ Doug Turnbull

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explains mechanism → Instead of classifying against a fixed tag vocabulary, let the model freely hallucinate candidate tags, then resolve them to concrete existing tags via vector embeddings over the corpus.the author · Simon Willison's Weblog