{"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-98xu7oxr","versions":[{"created_at":"2026-07-02T07:42:01Z","element_count":69,"note":"5軸GA polish 45->93 by M5 (autonomous)","saved_by":"mcp","sha256":"ac627ea0dedf5ce42b388f421a748d25c1e9ca368c1b5540d7b8fe1b84983b11","version":3},{"created_at":"2026-07-02T07:29:52Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2b34b8bba191fdab5ccef272ef1d58a3b1302d62eb0d2243124983ffc6989819","version":2},{"created_at":"2026-07-02T07:29:52Z","element_count":83,"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}]}