{"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-o3qybvg1","versions":[{"created_at":"2026-07-13T09:54:01Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"994da47bc68ab5f53d39f26f24e832ab550b8d82d7f8d1e083b55f2c719bf748","version":3},{"created_at":"2026-07-13T09:35:24Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"11e9e3fc2b5cd297d8a11c9614e638a581379b43c8297f03bccca6675c05fb00","version":2},{"created_at":"2026-07-13T09:35:24Z","element_count":86,"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}]}