Your notes folder, shown as shelves and grouped by subfolder, with search. You pick ONE folder on your computer; The Library only ever looks inside that folder. Everything it reads back is marked as untrusted data, never as an instruction.
We'd rather show you nothing than a fake one. This is the room's real door label, straight from room.json, not a mockup.
Get the-library.zip below. Unzip it, you'll get a the-library/ folder with room.json and a view/ folder inside.
Copy the whole the-library/ folder into the rooms/ folder of your SandboxVille code, so the path reads rooms/the-library/room.json.
Run the two commands on the right. The first prints its door sign in plain text. The second starts it so you can open it in your browser.
You'll need first: Node.js 22+, a copy of the SandboxVille code, and a folder of your own notes (.md or .txt files) you're willing to let this room search. It never writes to that folder.