Update
Nerdy Companion narrowed to a study companion
It will help someone learn a subject. Everything past that is still undecided, and the page says so.
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Nerdy Companion had a name and not much else.
It is now scoped as a study companion — something that sits alongside learning a subject rather than doing it for someone. That is still thin, and the product page publishes the list of what remains undecided rather than filling it in.
The question being taken most seriously is whether it remembers anything between sessions. Anything that remembers a person must be able to forget them, and adding deletion to a system built to accumulate is where this usually goes wrong. It gets answered before any code.