{"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-1f71uu2g","versions":[{"created_at":"2026-06-29T06:32:37Z","element_count":84,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"d1e447bd7ff22c14265bcf031168dec1cad80114aa55c2cdee408131981de9f0","version":3},{"created_at":"2026-06-29T06:18:53Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"63cb07f1128f8d97151591a42b4c1f5274d8a7847eebc33e5ae00e0eac9b0188","version":2},{"created_at":"2026-06-29T06:18:53Z","element_count":83,"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}]}