{"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-9ug2c1sc","versions":[{"created_at":"2026-06-10T22:01:07Z","element_count":54,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"6ac6be96f1fb2588000fb2abe2f3c4affaa38b99fc28f80a2ec48a97bacb4ca1","version":13},{"created_at":"2026-06-10T14:13:30Z","element_count":71,"note":"5軸GA polish 59->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e2f000a05f4758315606f661eb46a37854edad53919fff7efd1a3df711cdc643","version":7},{"created_at":"2026-06-10T13:47:00Z","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":"a395dcf4ba9c46272e405267bc3d331213cbd39289624c32b132f63c25acbc77","version":4}]}