{"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-m29qh7qy","versions":[{"created_at":"2026-06-10T23:05:54Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0ab78e46573e41363fa7326c5d0b9ada2aea2bbf799990d9dec33e4792565762","version":9},{"created_at":"2026-06-10T22:17:52Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"01cbbcbd446523dee10005d0f12c9c10e1db9423ba3e07edf002bd3777c48705","version":4}]}