{"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-j1ihtp1s","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote18890067 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"335b4ceab91eb2aa8baf41677c4015b73223eaccbca05a26925ab595ed46a485","version":23},{"created_at":"2026-06-10T13:30:29Z","element_count":77,"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":"4586314634af48af1b4417fdd8b8c46463a4edb85dc6485214051e718147e5bf","version":9},{"created_at":"2026-06-10T11:43:39Z","element_count":73,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"0eaf0b0e205e6d5e35e6cc8524e370460e1751aa637ecf50663d561b94c58898","version":4}]}