{"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-5ah3u2y8","versions":[{"created_at":"2026-06-13T18:35:20Z","element_count":73,"note":"5軸GA polish 47->97 by M5 (autonomous)","saved_by":"mcp","sha256":"61ad64eb6892f2ca815ad297fea0726ee36433785b4d79170cbc4e1b12a08ddd","version":3},{"created_at":"2026-06-13T18:28:47Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7314367f884d406f68b570397c129e4a6a99ebfda4cff639d14f249158bedf2f","version":2},{"created_at":"2026-06-13T18:28:45Z","element_count":89,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}