{"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-vnhu7fxm","versions":[{"created_at":"2026-06-13T17:52:19Z","element_count":74,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d1077d6b6904e6aacd446a9d1c48de3b929f0a172a39f9b6559eabb29b0a9c62","version":3},{"created_at":"2026-06-13T17:48:42Z","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":"b099a71ae2a955499c4002db027810a440e96e9fe787c5a34f52fc946343fd5c","version":2},{"created_at":"2026-06-13T17:48:39Z","element_count":105,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}