{"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-theoldoakhouse-lfkozusf","versions":[{"created_at":"2026-06-30T20:25:38Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"3979a9daeadaa5a9073afaf333bfe94af3b4ab759797b6a85714c4b80a67ef9f","version":3},{"created_at":"2026-06-30T20:19:09Z","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":"c0a5686a5e91be613ff497300bc6746e4c43e20934dfd52bfe641e13b33f912f","version":2},{"created_at":"2026-06-30T20:19:09Z","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}]}