{"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-eyoumj1p","versions":[{"created_at":"2026-07-20T06:06:56Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a726ae6600f8ba96b19f7d20f703a271ce2b5ff58ff324c81b7226817c18f9e5","version":3},{"created_at":"2026-07-20T05:59:36Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"dbb1ef7b1256b125e06c5943015f46e0fc9185720347c06ad39f6feba949cf10","version":2},{"created_at":"2026-07-20T05:59:36Z","element_count":130,"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}]}