{"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-jvp0de6a","versions":[{"created_at":"2026-07-19T20:05:13Z","element_count":89,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"8c1ae311250f9b12d67f2a2be2585e530649f77efd8bf6c7a097603280028409","version":3},{"created_at":"2026-07-19T19:57:19Z","element_count":85,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fdf32b4c4c9c51fa1ab737064daad964bdf2f398c2803a4fb4495634b6af4bd7","version":2},{"created_at":"2026-07-19T19:57:19Z","element_count":85,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}