{"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-01y3tgei","versions":[{"created_at":"2026-06-16T05:59:40Z","element_count":90,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"15de0d2920ba889a9b325eef24c5fd8b6a6e2e849620d486730463da856b1c20","version":3},{"created_at":"2026-06-16T05:56:12Z","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":"44a2fa0a7b6c411d6eb260529f4075105dea15450da5ef613c5df72322cb4e0d","version":2},{"created_at":"2026-06-16T05:56:07Z","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}]}