{"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-xzs23q9s","versions":[{"created_at":"2026-07-03T06:27:36Z","element_count":89,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"1117679d723f3a7ae56375ce6a3f73702323d9bdc6e150284481a44293b8c6b7","version":3},{"created_at":"2026-07-03T06:23:57Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"70ffe8ec2fe33064a80d8cd06dfc6af4ccb0c74ed1e514fdf95ef2320d1c8b67","version":2},{"created_at":"2026-07-03T06:23:57Z","element_count":126,"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}]}