{"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-iomiyvrl","versions":[{"created_at":"2026-06-26T06:28:49Z","element_count":90,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"cf8e69459821d1f25bc4d074e8e24dbd7377764c6e2d87a498a3ffe173a15131","version":3},{"created_at":"2026-06-26T06:18:14Z","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":"4d845d2ac23b801a58e81ac166537a5e12404d54de5d2d29697816f0fb38e685","version":2},{"created_at":"2026-06-26T06:18:14Z","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}]}