{"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-shcud170","versions":[{"created_at":"2026-06-10T22:52:36Z","element_count":85,"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":"c9fb4cb9b5186cd36050f75003daf327988b9b0b703fc93ff9befddf7fd65736","version":18},{"created_at":"2026-06-10T14:12:49Z","element_count":91,"note":"5軸GA polish 63->97 by M5 (autonomous)","saved_by":"mcp","sha256":"71e0ac92ddb491a44ef9aea3b0f768e725ada27521db88f20b29f56fca31dc48","version":7},{"created_at":"2026-06-10T13:47:32Z","element_count":54,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"383c1bf559072919998b17245974dae5ba88a6cad0ae99835181dfc2392729b4","version":4}]}