SQLite

This demo runs on a single SQLite file in WAL mode, and there is nothing apologetic about that. The server talks to one storage abstraction that dispatches per backend, so Postgres is a config change and a different set of migrations — not a rewrite, and not a decision you owe anyone on day one.

What it actually stores

Document updates, not rendered pages. The prose you are reading is a sequence of CRDT operations that happens to converge on this paragraph; the HTML is derived, cached, and thrown away whenever the document changes.