{"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-ew9nfi31","versions":[{"created_at":"2026-06-10T22:54:28Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20857152 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1904f49b684421aec27f8d7288ca6ab2cf159db6899189ed5b402cbad08c4912","version":10},{"created_at":"2026-06-10T17:39:46Z","element_count":85,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"819c7c20c0ddca86034f39041e423846d8b459b468f36d3d2d96d57447fc12bb","version":3}]}