{"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-mnbyj924","versions":[{"created_at":"2026-06-27T19:37:15Z","element_count":68,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"6cc8212e9a4db429b2a7b741753169249e6a04b27f61036d0c37dde6d693ae47","version":3},{"created_at":"2026-06-27T19:24:13Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7018a131d9762755f064997b8b4b19e4a012dfb96b07e568d06c20dd5716319f","version":2},{"created_at":"2026-06-27T19:24:13Z","element_count":86,"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}]}