{"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-theoldmillhouse-dwnu4psu","versions":[{"created_at":"2026-06-13T19:03:36Z","element_count":91,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"188ec94710ac37776317b33a690041c63b492e6bf3da519e66eea4f850098317","version":3},{"created_at":"2026-06-13T18:52:19Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"42aa277cb4c100f50583b2fa26532e21f4b0f401b42b944a7c91db146ad57195","version":2},{"created_at":"2026-06-13T18:52:18Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}