{"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-cornerplacebungalow-vu9zo4rr","versions":[{"created_at":"2026-07-07T15:36:00Z","element_count":72,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"1134d3210ef819c2cffeee1bef57912f82de880dd009e039ca0463a4a6ddceeb","version":3},{"created_at":"2026-07-07T15:26:28Z","element_count":101,"note":"loop3: 設計時延床 50.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"274a750864a74b7a7aebf80c9b2622889bd5030e9fb0234bf0039e90112794ac","version":2},{"created_at":"2026-07-07T15:26:27Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}