{"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-n4iimt4o","versions":[{"created_at":"2026-06-13T20:14:57Z","element_count":85,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d91b42272102eb786e68485427d2f6774409d71401d5d0eaeb9204db5773b506","version":3},{"created_at":"2026-06-13T19:59:06Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b547a05a39aa06f852a1adabde5c1b8b242b07a3f33bc19244dc1eb2e37b9306","version":2},{"created_at":"2026-06-13T19:59:05Z","element_count":87,"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}]}