Nice primer. Two quick calibrations before we graft it onto the myth-engine:

1. It's tenet, not tenant. Unless you're implying the Demiurge is subletting the material cosmos, which; stylistically strong, ontologically shaky.

2. In Homestuck, "gnosis" isn't really a single pipeline; it's a routing problem. Multiple buses carry privileged knowledge, and the story keeps hot-swapping who gets root.

- Prospit dreams ≈ gnosis feed. Jade's handle telegraphs that she's the early knowledge bearer because Prospit/Skaia literally rains spoilers. When her dreamself dies, that uplink drops. This isn't the theme disappearing, but failover. This "packet loss" pushes "knower status" toward other roles (Seers, readers, and-awkward cough-authors).

- The Game as Demiurge. SBURB is a craftsman-god knockoff: imperfect world, perfectible through puzzle-ritual labor. Carapacian bureaucracy, Denizen bargains, and quest algebra all function as jailer protocols. You're meant to wake up to how contrived the lattice is, then leverage it (time loops, retcon, juju) rather than pretend you're outside it. No one is outside it. Hi.

- Yaldabaoth's job. Making Caliborn face the Big Fake Maker is on-brand. He doesn't accept the Demiurge's frame and instead murders the exam and graduates himself to Author/Antagonist. That's not anti-gnostic. It's recognizing the prison and deciding to run it. The shift you feel isn't necessarily "gnosticism goes away", but more like gnosis weaponized into authorship.

- Readers as archons (sorry). Early commands ("What will you do?") distribute demiurgic authority to the audience. Later, that power centralizes: first in Caliborn's "masterpiece," then in metatextual narrators who insist they're putting the story back "on the rails". Every time control re-concentrates, the comic asks whether knowing is the same as saving or dominating.

- Ultimate selves = immanent pleroma. The epilogues/HSBC move gnosis from prophecy to integration: you know the truth by becoming the set of your possibilities. I wouldn't categorize it under escape from matter, bur rather version control for souls. Push, merge, resolve conflicts, attempt not to brick the repository.

Where does that leave Jade? Not "theme discarded," but role reallocated. Space still seeds creation, but the privileged-knower mantle migrates to Seers, cheaters (Time players), the Audience, and narrators who think ethics is a UX setting. The gnostic question persists: Who gets to decide what's real, and who has to live in it?

TL;DR - The Demiurge is whoever currently believes they own canon.