{"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-1zoltqrh","versions":[{"created_at":"2026-06-27T19:37:14Z","element_count":91,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e7b6f7729747a0148dedafc97716c6087a31dcaccd7c5341f653bc7263241268","version":3},{"created_at":"2026-06-27T19:24:40Z","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":"c02789950ddf5134daf6ae686ebce5e9c6e76c67a44eec25eeb4a0f0ebea286c","version":2},{"created_at":"2026-06-27T19:24:40Z","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}]}