yume-extract-author

Stage 5 of the text-to-world pipeline (2026-05-25). Reads a semantic map (PNG) + class catalog (JSON from stage 2) + optional heightmap (PNG from stage 4), and writes a per-scene Python extraction script that emits extracted.json — the sparse tile-map output containing per-class biome masks (terrain_shader), per-instance positions+rotations+sizes (object_placement), and a heightmap reference (terrain_displacement).…