{"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-1vkusncs","versions":[{"created_at":"2026-06-13T15:50:57Z","element_count":90,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"87566a39b68fef1587bb1c5c1ac72264d410aa69a21a3bb7919dc5b448aefc3a","version":3},{"created_at":"2026-06-13T15:48:20Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"cfbb8d5c1a47a1f9de51190cce9989137d836eace766d51e528ac7d59aa2a36b","version":2},{"created_at":"2026-06-13T15:48:17Z","element_count":119,"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}]}