Me trying to pick apart the subtle lore behind the Spire Fleet and the other so-called "spire" ships.
(assuming that the AI is not a Spire Hammer, Spire Descendent, or Spireling type; I am not going to bother with metalore.)My current theory is that no one has the technology to replicate the Spire Fleet proper. The smaller, simpler fleetships have be reverse-engineered, but neither humans, zenith, and AI alike can replicate the capital ships. Only crude mimicry of the Photon Bombardment Cannon is possible. Shadow Champions can mimic anything, but for all intents and purposes the Shadow as a race simply do not exist.
Spire Fleetships aren't meant for Exogalactic Travel, so they kinda got left behind when (if) the Spire Fleet regrouped. However, the AI has been doing exactly this due to its impressive Warp Grid and in fact probably favors using Spire Fleetships against the Imperial Spire just for the sheer irony. The AI got ahold of these fleetship designs though cliché reverse engineering, and we all know how the humans love to steal AI tech.
The Spire Starship, while destructive in its own right, is little more then a crude attempt at mimicking the Spire Fleet. Same goes for the Zenith Beam Frigate, the Zenith Beam Starship, AI Wraith Lance, AI Heavy Beam Guardian, and Human Heavy Beam Turret. Some of these exceed the specifications of the Spire Capital Ships that they are based off of, but none of them have actual Photon Weapons.
However, this theory falls apart when faced with the Spire Corvette.
A starship-sized vessel developed by retrofitting the smallest Imperial Spire combat design with human technology. Has a moderately powerful photon lance, but can also mount a small number of modules.
If the AI was the one using these, it would make sense that the scatterbrained cloud-computing-gone-wrong AI would deploy Corvettes without deploying Frigates. But the humans utilize any and every ship design they can get their grubby hands on. If the humans found the design for the Red Dwarf they'd probably make use of it.
Retrofitting the Spire Frigate makes sense only if Spire Frigates are actually available to retrofit (i.e. Fallen Spire). The humans would be eager to use their Spire Frigates alongside their shiny new Spire Corvettes despite the latter being the superior ship. Yet the Spire Frigate is unavailable to manufacture without the help of the Spire.
And there is the asteroid Spirecraft. These are Spire ships how?
Spirecraft are pre-existing designs with no research needed, and the only reason why the humans are not mass-producing them like everything else is that their construction requires large quantities of rare materials. They are built for humans, by humans, utilizing technology readily available to the humans. Perhaps the Spire has used them once, but they no longer have the awe of the Imperial Spire Fleet that has inspired so much mimicry. Nowhere are they present in the Imperial Spire Fleet. They are so far removed from such, and the humans are the only race currently known to be using such, which makes them human ships.
'Tis a strange galaxy indeed. Even Captain Kirk could not imagine such a world.