Hey 👋

looking at the spec section for authors I've noted that it reads posts must contain one author object, which.

If I'm not mistaken, www.jsonfeed.org/version/1.1/ defines an author as having at least one of the fields name, url and avatar. Are the expected constraints here the same, or should an author always have a name, url and avatar?

Hey 👋

looking at the spec section on ping I've been wondering:
should the HTTP method be restricted to something like POST here, or is it intentional that no method is mentioned?

What are the desired methods that a server should support for ping endpoints?

Looking at spec.md#feed I noticed that it states:
next_url must contain the next batches feed url.

However https://www.jsonfeed.org/version/1.1/ appears to state that the next_url field is optional.
Would I be correct to assume that it is valid to omit the next_url if there are no additional entries?

If next_url cannot be omitted: how does software recognize that the end of a feed is reached?

I imagine that depending on the implementation it would be possible to have some intermittent batches in a feed that don't have any items in them. For example an implementation that batches items on a 24h basis could have nothing for a day?