{"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-theoldmillhouse-nu2kygwu","versions":[{"created_at":"2026-06-13T19:03:23Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"37259c1edc5c87b516a63ed71c418eae42a4dd07f07028a4f1909a5e781eaa8d","version":3},{"created_at":"2026-06-13T18:58:33Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4bb1cf0e58d6fd4ed619903094bcdab18f6a6a9982c97164157ab653ab595717","version":2},{"created_at":"2026-06-13T18:58:26Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}