{"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-det1y2cv","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21000231 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4cff3647f1b8616241a27879e0babc1b3f7bc10cf54f819b132ae8889e5942b3","version":16},{"created_at":"2026-06-10T14:46:03Z","element_count":89,"note":"5軸GA polish 55->98 by M5 (autonomous)","saved_by":"mcp","sha256":"608dc7eafd3381d941240209ad5b3f25771c100cb1017585098d70eb2929767b","version":7}]}