{"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-gcy0ocp1","versions":[{"created_at":"2026-06-10T22:52:36Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote21040267 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ce6e876a10c4eaa17f511d5e89a8b4744d02a788687743bbe37bf5e23e3933db","version":18},{"created_at":"2026-06-10T14:12:53Z","element_count":84,"note":"5軸GA polish 69->98 by M5 (autonomous)","saved_by":"mcp","sha256":"db1843df9287fe621be51f107b71accb22a6af0773a68cf5a99e03a2dd39cd91","version":7},{"created_at":"2026-06-10T13:46:55Z","element_count":44,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"a08a36f0dfa5a8ba289286cd65013cec1ed4bcb847e2024197a0caa416bd65d8","version":4}]}