{"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-1vgmx224","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b18d253eaeb8a2c839dfcf3df5c8f58e5a83e5d39e8c22dd7231a5089f0983cb","version":15},{"created_at":"2026-06-10T14:46:10Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c47e0c410501eb39c4a79b16856d4d84cf79dbd21cd921e88d92fe14eeb54e01","version":6}]}