{"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-tpmuo6nh","versions":[{"created_at":"2026-07-13T09:54:01Z","element_count":83,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"f383888850416df2718776394ba50da2b71f7f4f862c50b997a22310892653b5","version":3},{"created_at":"2026-07-13T09:37:50Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a7cb83abe4447e1e3a9d7d93f8ccc86212ab4d741edd4847d70a49e20789e22e","version":2},{"created_at":"2026-07-13T09:37:50Z","element_count":105,"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}]}