{"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-bs0v4a5a","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19910068 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"36629601c0fa801d74f29024b272b896fb38201ca878bf321023ec4bb1a9394b","version":12},{"created_at":"2026-06-10T15:36:59Z","element_count":70,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"bf8f89ac815837a3d8763da7907aa8642acfab73555a58c8497fe898508bc323","version":4}]}