{"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-house-y8gdybum","versions":[{"created_at":"2026-06-25T19:29:36Z","element_count":89,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"d7fdae64269d5c47406ac28172e6eacac2fc8247022273f3b8894af12f3df653","version":3},{"created_at":"2026-06-25T19:25:49Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"acbbb8881c360ee22cfbd2dc9a33ab379965aa135b6e320101ef562ea6ad7c15","version":2},{"created_at":"2026-06-25T19:25:48Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}