{"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-hzp2tmhv","versions":[{"created_at":"2026-06-25T19:29:37Z","element_count":68,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"1419b3decfdd23971765e9d4eddc6bb689e7edaeb00d03e8f66b2bbd6e0a343a","version":3},{"created_at":"2026-06-25T19:21:07Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"192bb9282cdf343adad512b85e703e0ced811bc09f2eb03838b4086c58e372dd","version":2},{"created_at":"2026-06-25T19:21:07Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}