It's okay, we all miss these guidelines from time to time but if you wanted to know if people are interested in that type of product or not before launch, you can join the monthly discussion "Ask HN: What are you working on?" [1]. If the HN community is interested in your idea, you will get a lot of feedback/questions to validate your concept.

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1.(https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...)