{"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-lnwukzqn","versions":[{"created_at":"2026-06-15T06:31:14Z","element_count":70,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9fc7b58a9980d4f8363f7ba1eef9f9234fb5039a5940e678dacdb5e33ed0218f","version":3},{"created_at":"2026-06-15T06:21:55Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"09d31e76e9ba5fd80353c7710e1977038fcc06fe1c320c49fbc1d95d7ca687c3","version":2},{"created_at":"2026-06-15T06:21:55Z","element_count":105,"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}]}