{"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-thewillowhouse-rr85f9hk","versions":[{"created_at":"2026-06-13T19:17:00Z","element_count":74,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d1077d6b6904e6aacd446a9d1c48de3b929f0a172a39f9b6559eabb29b0a9c62","version":3},{"created_at":"2026-06-13T19:04:45Z","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":"bcecf9b24b97ce8eb98781760df3079d45eec2efe5f31026e67c20f7cf112d4d","version":2},{"created_at":"2026-06-13T19:04:43Z","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}]}