{"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-hpp6r1ja","versions":[{"created_at":"2026-06-10T23:00:33Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ba8b0e5d4846c2f4e10619c3dae0d6403e56da6e54ba998e8bc9ef71afdcf59c","version":9},{"created_at":"2026-06-10T21:27:50Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ace06949aa69a1a5ca0f9bc5cbbc19ecbc0625f31724311f234492b134fa0b6d","version":3}]}