I'm not a lawyer but I do read a lot of law and I've followed this case very closely (including attending the trial that just got overturned).
@Ashrand this case is certainly being closely monitored, and earlier rounds of litigation have led to follow-up suits. One prominent example is Cisco v. Arista, which is now in front of the same Court of Appeals https://www.eff.org/deeplinks/2018/01/cisco-v-arista
1) Does this mean that anyone implementing an API-compatible replacement for a library needs to license the API from the original library author?
2) Are there any sort of BSD/GPL-like "API licenses" that companies can use to authorize reimplementation of their API without open-sourcing their entire project?
@lm 1) I would say you'll see a lot of developers and companies spooked and looking for licenses where they hadn't needed to before.
2) this is a good question and I don't know the answer. There hasn't really been demand for such a license previously, as this was considered (properly so, imo) to be uncopyrightable material.
Generalistic and moderated instance. All opinions are welcome, but hate speeches are prohibited. Users who don't respect rules will be silenced or suspended, depending on the violation severity.