{"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-uxgnz12w","versions":[{"created_at":"2026-06-13T21:01:23Z","element_count":83,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"e5519a998728c418e7cd160bfa0085402161e01ac2bba869308876bbed165a91","version":3},{"created_at":"2026-06-13T20:54:44Z","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":"a5ec81c6952538802e6257a49f5647a3ffc21b7fc49e62a7108d65128f21f609","version":2},{"created_at":"2026-06-13T20:54:38Z","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}]}