{"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-wt3hy8zx","versions":[{"created_at":"2026-06-29T06:21:00Z","element_count":88,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"7e1fe58280de173b253955c85aa31cf102971fe4aea4488564bdd1c9fd12b31a","version":3},{"created_at":"2026-06-29T06:16:28Z","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":"74b1770f18f875d20315a279524c97fbc9eb68642ec5642b47e924bf4a1e7054","version":2},{"created_at":"2026-06-29T06:16:28Z","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}]}