{"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-willowcreekbungalow-xzxqn1us","versions":[{"created_at":"2026-06-13T17:52:40Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"1934cc83610a72f450081093b6a77e59e7afe3c0e83bbf118e0bf1a0633b5af5","version":3},{"created_at":"2026-06-13T17:38:59Z","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":"b2926be88b864969caac4beabda5459e90c5467e93036a51b34c48a51f4c4b24","version":2},{"created_at":"2026-06-13T17:38:58Z","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}]}