{"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-3ly5v40u","versions":[{"created_at":"2026-06-10T22:54:05Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote24371566 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bdda89b41ae9c4a2d83ff6254ad2076c8e144a9fe5ba694ec73584ee8a8117bc","version":10},{"created_at":"2026-06-10T17:23:22Z","element_count":71,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"9379f043b68809ac6223f488f46208b93d770270a2d81a09f2cb31d343cfa088","version":2}]}