{"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-7vuv0d7u","versions":[{"created_at":"2026-06-10T22:56:33Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72844800→quote24557037 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"653aeb63c7363a73ea7d6fa07a3f98288f20971dacddc4b0ea251cb5e8c2b67d","version":10},{"created_at":"2026-06-10T18:46:37Z","element_count":72,"note":"5軸GA polish 61->95 by M5 (autonomous)","saved_by":"mcp","sha256":"8e028195aa6ed47cc0596297020f4bcc9d7c1b9d6fd7aa30b34d6483757c9e39","version":3}]}