{"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-o44cpi4z","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c0224b897f5e2175a4df04d1cb0d831394d98a5cc57ff58b78f21abbf7a76a06","version":18},{"created_at":"2026-06-10T14:12:48Z","element_count":85,"note":"5軸GA polish 66->98 by M5 (autonomous)","saved_by":"mcp","sha256":"159aac6a3b860d8a9af816e950e4b75f61368af0a9a99098e8416b0484911720","version":7},{"created_at":"2026-06-10T13:47:50Z","element_count":50,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"190411a9fcb2f4ac3f64444406ba349898300853c4f48b77ed88bd60d4a3e1e7","version":4}]}