{"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-xv135j9m","versions":[{"created_at":"2026-06-30T19:37:02Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"70fea5629807a384e95079cb2b7abf0736b450b9bb76c9dd2303b87afb9aca4e","version":3},{"created_at":"2026-06-30T19:28:43Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5c4e13f5b75a48efa87676addea3f2bf4303482b199abb0a3edfdb669f06790a","version":2},{"created_at":"2026-06-30T19:28:43Z","element_count":134,"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}]}