{"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-b6va2pt5","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19293329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1b23cd6f2a2cf5fa202de904e2a16bb9ddaabb786870728379c0d74a9927d23d","version":12},{"created_at":"2026-06-10T15:53:07Z","element_count":72,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"56d6416456ad8578ed013a949a3c46831f7b19081c4ef2959410e1f5134f74e8","version":4}]}