editor mode: update writes to the shared shelf (in-memory
across tabs). To save to file, go to the editor tab and click save file.
upload mode: update mutates the block in memory. Use
download to save a copy of the edited JSON.
0 / 0
cube = one semantic (_ / biome 0, auto-detected) · 1=center, 2-9 spiral CW from N · root on floor · depth 1 above · depth ≥2 below · glowing cube = hidden content (shift-click to dive in) · green ghost = this wake's write, landing next frame