{"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-1s0gnjja","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote19841009 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"15b8f8c93b5d852b11dc4dc9b3e1c2a5e92d3014b268592511dbd0d44cfe6404","version":23},{"created_at":"2026-06-10T13:30:22Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.3㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"6c21ddd163d179c20d15f8feb9f4d9decd06fbd1fb73ba078212aa8519a3ab46","version":9},{"created_at":"2026-06-10T11:43:25Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"03c09ade9f6bce438baba0a1d5f3b3617a1ad1aece50185a11e2b28c025fa3ec","version":4}]}