{"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-ib5roiv2","versions":[{"created_at":"2026-06-19T06:02:19Z","element_count":70,"note":"5軸GA polish 46->95 by M5 (autonomous)","saved_by":"mcp","sha256":"7c19a5ce607ca7921c47d1cc4e9179ed0b4dce64a3d0a6dd0927133e703330bb","version":3},{"created_at":"2026-06-19T05:55:19Z","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":"01dd222eb54fe0ddbb0bd5f3a0acb7dc4501776d6c683d2b3055b76ee301f3de","version":2},{"created_at":"2026-06-19T05:55:19Z","element_count":105,"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}]}