Responding to my suggestion that the Primordials may be, should be, "semi-canon":
So, where should we draw the line? Everything in Knightfall is canon while everything found elsewhere is not? I'd like to keep the Primordials, so it would be nice to have a easily distinguished "border" of sorts.
I'd like the Primordials to be canonical as well. The border is nonexistent as of yet, because Marc previously declared the Primordials non-canon. I'm trying to give them an existence, albeit one which ended quite a while before the Ancients. There's room for that.
I think Knightfall is nearly all canonical -- it says very little about the builders of the Shimmering City, so there's not much to get in the way. It's the unwritten concept behind those sophonts that's non-canon. At least.
So in a way, I'm not arguing for much, and in fact I may be arguing for nothing that's not already there. We'll see.
(Yes, canon is only for people who will publish. Referees do whatever they wish, whenever they wish. Me included. But still.)
Here's what Knightfall says:
Knightfall said:
The Shimmering City [...] can be dated to around -600,000 [...]
[T]he city was built by a mysterious race which the Ancients themselves were studying [...]
[...] archaeologists have coined a name for this new, previously unknown starfaring race: the Primordials.
* Something like globe technology shields the entire city.
* They built "sentry" towers into their city, situated in a pocket universe of unknown size (p53: "a startling, glimmering, city-like scene appears, sitting on a flat plane that runs in all directions to the horizon.").
* Some of their walkways could have been built on globe technology. [my speculation only]
* Flora and architecture both follow a spiral pattern.
* They built vertically. Living quarters were in high rises, just like other buildings.
* They have Telekinesis and Teleportation.
* They left because "they were dissatisfied". Ennui is a possible reason for vacating their city, although there was likely more to it than that.
* They used organic starship hulls.
* They did not use jump grids, but they did have jump technology (the unpublished backstory claims they could jump psionically. THAT is absolutely not canon. Knightfall does not state this error, so the book is OK there.)
* The Primordials apparently "died from boredom". I suspect that that is not a canon statement, and that there are other theories.
* Artifact: a "Teleportation Artifact"
(WHY create one if you can ALREADY teleport things with your BRAIN???)
* Artifact: Relativity Pistol. Now that is useful to anyone.