{"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-xda075et","versions":[{"created_at":"2026-06-10T22:49:46Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81611913→quote24269040 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"aa2ad9c80a350203dec49dfe8a402889b6e5c787331affd998f912933cb2882a","version":25},{"created_at":"2026-06-10T13:07:34Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"74b1c66b49525b35311ff9474e847654d59716a33ce0a88538f870a54e8cb5d2","version":11},{"created_at":"2026-06-10T07:25:47Z","element_count":83,"note":"5軸GA polish 57->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f472c973c385550c03a7dfa9536ac0f941fa619492a0b4be4da89a38a413fdc8","version":2}]}