{"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-v77jk8ju","versions":[{"created_at":"2026-06-10T23:01:07Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote24212747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"265ebe3e5b716cc176cebff132fae9cd5eaed2096b19f747ef6a27514ddfe9ec","version":9},{"created_at":"2026-06-10T22:00:52Z","element_count":70,"note":"5軸GA polish 54->95 by M5 (autonomous)","saved_by":"mcp","sha256":"35b60203b760322aa30207ca8b2c031f0e5fca0694cc411fb688241b26797798","version":3}]}