procedural-generation/terrain

The ground-specific layer of the procedural-generation skill: the model of a landscape as a raster shaped inside the one procgen graph, ended by terrain.landscape as an element carrying the Terrain component and realized in the scene through a Generator as a Terrain entity (terrain.write saves it as a .terrainData asset) — with the surfaces splatted over it, the holes cut out of it, the water standing on it, the collision under it and the height/slope/water queries it answers — plus the checks a finished landscape is held to.

instructions.md is what an agent receives on invoke; skill.yaml carries the activation description, the acceptance checks and the dependencies.