{"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-willowbrookhouse-1ened3mq","versions":[{"created_at":"2026-06-11T04:23:37Z","element_count":70,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"090f5b9561fc5e7742db121e4b37d2125694ef9df6a7faeb0b34e961869c6cf0","version":3},{"created_at":"2026-06-11T04:10:42Z","element_count":106,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6f62924828018303becc46a812d9cc2ec4a6028f3ac12f1ae3182342f786b2c3","version":2}]}