{"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-eu8qtqrf","versions":[{"created_at":"2026-06-27T05:58:54Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"a7c8751a40eaaedee38098260bbdd3c2d7ad6134c0199dff6279e5051067a429","version":3},{"created_at":"2026-06-27T05:52:54Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a3ac7f389b431724aded89638ca57bffaea351788614ff3c3f86b187af5cea25","version":2},{"created_at":"2026-06-27T05:52:54Z","element_count":87,"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}]}