{"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-aa8njymb","versions":[{"created_at":"2026-06-13T16:42:43Z","element_count":91,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"033888b159ac3f0ad8296ab80424a36aa9182fa0b2380ae16cb87235b53009bf","version":3},{"created_at":"2026-06-13T16:27:36Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"054e4889ba73f1c1744609768d8fa132547f18f6c164db180b6ebb83020b7ebd","version":2},{"created_at":"2026-06-13T16:27:32Z","element_count":119,"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}]}