{"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-8n7x3bgt","versions":[{"created_at":"2026-06-30T19:50:48Z","element_count":68,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ec0348df601fbab34f5393a0f81137b419e55b3c8a446fb8671efd54acffb55e","version":3},{"created_at":"2026-06-30T19:35:09Z","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":"461459a45dc267b15c526879a6e09191a47e26e1f1b448fa648ef6c55c41f450","version":2},{"created_at":"2026-06-30T19:35:09Z","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}]}