Urth
Sparse-first planetary twin, spatial indexes, and the 2026 world-model landscape
Urth is WeftOS’s sparse-first digital twin of the planet. Geometry lives in the BVH. Appearance may be a splat. Plans may use Graph Views or optional LeWM. Generative fill is never metric truth.
Scrollyteller
The living briefing (where we are, 2026 sources, research queue):
Canon
- ADR-056 BVH spatial-temporal index
- ADR-078 splat feeds structure
- ADR-079 Urth LOD and honesty rule
- Survey:
docs/research/spatial-intelligence-2026/README.md
Indexes
| Lens | Answers |
|---|---|
| BVH | where / when / shape |
| HNSW | feature similarity |
| Causal + UNID | why / lookup |
| Graph Views | fusion, then promote into BVH |
Residuals (live publish, daemon RPC, F9 promote, OSM ingest) were recorded in docs rather than as board tickets when this page was written. Plane is historical since the cutover to the dashboard board; check the board for current status before relying on this list.