{"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-a83g7b2b","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote23621627 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c07fa4042de6fc79314f8b2686381d5c433153397ade4c9e49bbcb7f70cac068","version":20},{"created_at":"2026-06-10T13:35:07Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(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":"598d125834ec8b87458411407ec53b44a561ff50fb5a0d750fab5cde48d9ac1e","version":7},{"created_at":"2026-06-10T13:06:04Z","element_count":71,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"fbf7e37fe3a62dd78b8a8900f10ed2d3fdd3e84e4e0dff92420a44d28463f8cd","version":4}]}