{"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-5fqgjaeq","versions":[{"created_at":"2026-06-13T17:24:32Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"9ce3530871c77a59fbcdcf86b0f4a856dc26e700abd08c7df7f66420a5a227bb","version":3},{"created_at":"2026-06-13T17:14:44Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ff31bdb2ab6b5555d3cf3c843796b25e8edd07b9aac44c211899ed97a34de7ac","version":2},{"created_at":"2026-06-13T17:14:42Z","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}]}