{"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-cunninghamedgehouse-wmnl5fmg","versions":[{"created_at":"2026-06-10T13:20:13Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(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":"11fce66ac776e5d57aa88f75f17df534382494105c29250dbba0496941c1e1c1","version":10},{"created_at":"2026-06-10T10:23:21Z","element_count":73,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ba511503ce4758fb0686d9ec51ec9447b75382b6441c233f11b5c978ed438431","version":2}]}