{"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-k71l11c6","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote24966245 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6eb70a6f36c275ef6ea7e1eacb2f8251a7a3de2de3926ab6a57fc6d0f36ee4c5","version":23},{"created_at":"2026-06-10T13:30:54Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(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":"fd5e36cb83e933fa4fdf35ce8a416e860abf844288328311acdf00e1a936dc19","version":9},{"created_at":"2026-06-10T11:59:58Z","element_count":84,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"5d482f874be15ea5548cc1ae7d1ec3f8fa186523262e757d14f1aabd809656ca","version":4}]}