{"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-gfhu38gg","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"73c7169f7c21867b0d10772e1fc9ac8e9775ee2034fedb25b58b28532c65209d","version":15},{"created_at":"2026-06-10T15:03:44Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3d4b59c260946d0c665d5b5be306d36da68fdf9d13b1094967d6c6ac387af185","version":7}]}