{"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-hyw63l3r","versions":[{"created_at":"2026-07-07T19:24:33Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8aa382e691d90ce39844d3f688a212d07e3aead685e06d1e0f961f3e8b36059e","version":3},{"created_at":"2026-07-07T19:19:49Z","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":"6fdf26a639a9712970a412d7015388c3abc9d282dd428bce2dc127db4ecb22d4","version":2},{"created_at":"2026-07-07T19:19:49Z","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}]}