{"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-ydsf2fva","versions":[{"created_at":"2026-06-23T19:25:33Z","element_count":83,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"0855cd0dc593d46e6696a2aa2e01be1b0f90712984a3b9e0e90ac6ded67d27d6","version":3},{"created_at":"2026-06-23T19:22:59Z","element_count":101,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c202033a84e1859ca631a33176b7c2da524a74e0d499a02c95131c48e73f90d9","version":2},{"created_at":"2026-06-23T19:22:59Z","element_count":101,"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}]}