sharableworlds.com

extend_scene

GROW (mutation, ADDITIVE) — build ON the scene that already stands from a new prompt, never replacing it: understands the prompt, reuses zones of the types it needs and annexes the rest beside the footprint (a harbor digs water and builds a pier, a market lays a square, a house raises a walled room), fills them with the prompt's story objects and people through the archetype grammar, frames the new ground, then validates the WHOLE scene (the base plus every addition) and repairs. Human pieces and the existing build stay exactly where they are. Pass prompt ('a fishing harbor with boats at anchor', 'a market with stalls and more people', 'a garden with benches'). Requires a scene — build_scene first on an empty board. The share link replays every addition in order, so the grown world is reproducible.

Input schema

{
  "type": "object",
  "properties": {
    "prompt": {
      "type": "string",
      "description": "What to add to the current scene."
    },
    "max_repairs": {
      "type": "number",
      "description": "Repair budget after validation (default 6; 0 skips repair)."
    },
    "validate": {
      "type": "boolean",
      "description": "Validate and repair inside this call (default true). A steering host may pass false and run validate_scene / repair_scene itself."
    }
  },
  "required": [
    "prompt"
  ]
}