How a project is stored

A project row owns:

•instances — Roblox-like tree (Name, ClassName, parent path, properties)

•scripts — Luau source keyed by instance

•revisions — snapshots the plugin can pull

•messages — every reasoner / architect / builder / user line

•generations — job status, model slug, errors

Empty explorer means no instances yet. Empty chat means no job has posted. We do not seed demo trees.