{"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-8ttcqpgf","versions":[{"created_at":"2026-06-22T06:30:21Z","element_count":90,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"25227f7c7d3f91e148ce9ed641fb9d7588cb453e5ae7e160f5b4d77b7f599cae","version":3},{"created_at":"2026-06-22T06:20:21Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c8fad8be3ecdccb11f67818d26a4f0216b8b8bc5ec2ffc6ee74dcad613efad19","version":2},{"created_at":"2026-06-22T06:20:21Z","element_count":126,"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}]}