{"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-gqlv2i7m","versions":[{"created_at":"2026-06-26T06:53:08Z","element_count":73,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"145601cf71aef138e6ac2542cb7351801f827cd65138d9d20de72db41d301b6a","version":3},{"created_at":"2026-06-26T06:47:28Z","element_count":101,"note":"loop3: 設計時延床 80.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f1b8b888ec99f5edd1e49000b1cf1a6ea17c80419e2aa2a777388aedbc79a2de","version":2},{"created_at":"2026-06-26T06:47:28Z","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}]}