{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-74dm6eax","versions":[{"created_at":"2026-06-15T19:36:47Z","element_count":83,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"36cbd150e087e623da1373ec1e53dc50f7742f2a8214435f2ebad727ca58c331","version":3},{"created_at":"2026-06-15T19:32:39Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9e49f4c0ad891d16bd2d9ab45c5b2f5d795a982bc82bbbcf4f7c9eec081165e3","version":2},{"created_at":"2026-06-15T19:32:38Z","element_count":85,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}