in fact - he got nothing, no formal contract, no license.
[...]
If you call that sloppy licensing from the original authors, I surely agree. But that doesn't mean that the story has to continue like this. What you're currently doing is again a sloppy/risky scheme by not knowing the details and backgrounds.
Again, if you want to be on firm grounds, "re-implementing" a closed source API does not help much. It only continues the trouble. As said, you have two options: Either try to get a valid license (and for (L)GPL, a *transferable* license) from the owners, or reimplement an rtg system with its own API.
So I don't quite see in how far your attempt can possibly clear up the situation. It cannot. It just adds more uncertainty on uncertainty.
sloopy licensing.. i literally imagine how this went, under the table, with some loosely worded hints and appointments as the one invitiation to table towards gunnar. no wonder, the subject of these appointments was worth nothing, worth no time to set up any written agreement, and it is still worth nothing or almost nothing. and since the ends went loose once you will hardly be able catch them again let alone bind them together. dont phantasize, that the situation might ever legally improve, it can only get worse, from your point of view. athropy even if gradually. and this concerns many if not most dealings around "amiga" this days, not only p96, but also deeds of the entities you consider secure. probably the only actually legal island aroud here, of any, is whats been developed as open source.