Add the Jackdaw-inspired level-blockout workflow: brush schema, draw/edit modes, CSG, per-face materials.
Make assets feel live and production-like: material browser, PBR grouping, drag/drop assignment, reference repair, headless processing.
Add larger-world authoring and practical prop placement: terrain sculpting plus physics drop/settle.
Turn Blacksite from a single editor crate into a future-game editor platform through static extensions and narrow remote prototypes.
Lock in quality: samples, tests, profiling, docs, and first-run guidance.
Future brush architecture beyond the Jackdaw-inspired MVP: first-class concave authored brushes, compiled brush geometry, robust CSG, material/UV preservation, collision output, and diagnostics.