{"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-x0x09rfr","versions":[{"created_at":"2026-06-13T16:16:23Z","element_count":71,"note":"5軸GA polish 41->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8ae5fa75f088b38ed477c70423aee8a5810e2bd20b5bd19a132689f696895ef9","version":3},{"created_at":"2026-06-13T16:08:18Z","element_count":105,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"08e90995d2ad2a60f64ca1fa2f118c47d2958277039c368a3b7322c66a6e6b21","version":2},{"created_at":"2026-06-13T16:08:18Z","element_count":105,"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}]}