{"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-gentlehillbungalow-oos6bkn7","versions":[{"created_at":"2026-06-13T17:38:59Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d64d5705b7f16ce8a951b343ed5c2c856d2824a4044cd2e4d0ad287f9050c226","version":3},{"created_at":"2026-06-13T17:29:50Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4b319607a0490669ac19f322ea7fa5b5906693372dc06bd026f05a9d2f98dd39","version":2},{"created_at":"2026-06-13T17:29:47Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}