{"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-320bvpb0","versions":[{"created_at":"2026-06-10T22:59:46Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote23449367 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"376803c70f4fdf98ad84ed46e688086aa5456dbc8697fb6eb0cbf0d98d3b7d6d","version":9},{"created_at":"2026-06-10T20:54:26Z","element_count":84,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"227c70604aa03e2ede379d5466207bf18d2791a45de3aebb5c9df145ac0d8e78","version":3}]}