{"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-tzvx49o4","versions":[{"created_at":"2026-06-13T15:50:57Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ea4b93aeb5dacb4880b5f1c7d58679e149cc2702ea149966d3333430623c2117","version":3},{"created_at":"2026-06-13T15:46:09Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5aba555e632da893bca0b5497518d6f7dd21939dbfc35494e04f8c3775a53c43","version":2},{"created_at":"2026-06-13T15:46:04Z","element_count":107,"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}]}