{"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-uy945uqz","versions":[{"created_at":"2026-07-13T10:23:54Z","element_count":83,"note":"5軸GA polish 41->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4e150a2c617e47117f7fd7f0fc26501b4983e8ee64ef9e8e2663d7ed9aa830e3","version":3},{"created_at":"2026-07-13T10:09:57Z","element_count":126,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"dad7e0f9cd9d199aa3d717b05427d2491d21a2975a7e9739196922304be8658b","version":2},{"created_at":"2026-07-13T10:09:57Z","element_count":126,"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}]}