{"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-riverviewhouse-m1e66fr6","versions":[{"created_at":"2026-06-13T19:17:03Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"37259c1edc5c87b516a63ed71c418eae42a4dd07f07028a4f1909a5e781eaa8d","version":3},{"created_at":"2026-06-13T19:12:44Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"cba5b9525be2042ab781a4e99e07d6d8e39e3f3ffd369063cded7da27599cd14","version":2},{"created_at":"2026-06-13T19:12:43Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}