{"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-ye46u4ny","versions":[{"created_at":"2026-07-03T19:41:49Z","element_count":72,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"6b4de3562e71f7dc16575ad8493b44804f63d0fd926782590f68ad2ca5c07d29","version":3},{"created_at":"2026-07-03T19:36:14Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b1e7652d69c94a46d2edcc4b8f36ec75a67310ae0e7489ae2ce69d9c3ef26d50","version":2},{"created_at":"2026-07-03T19:36:14Z","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}]}