{"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-71yyzrug","versions":[{"created_at":"2026-06-25T07:32:36Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2b98733c947b56e3142a2b6675879d2bfd1d3e2bef29e2a22d35bcf63434b9b5","version":3},{"created_at":"2026-06-25T07:30:30Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e12719982ad06141fe88cc1bdb854b751caa3a216707973dab8320d9f2f2b0f5","version":2},{"created_at":"2026-06-25T07:30:30Z","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}]}