{"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-0vk12k0m","versions":[{"created_at":"2026-06-10T22:49:53Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21115024 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4c2d5a4d95884520c872fc91cca71f3e96c630c6e851c847ed12b338b3ccf0a3","version":25},{"created_at":"2026-06-10T13:08:00Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"00f88679e8b5107efa35045770c208cd28abb799f6c4df2c55f02845728e4cb1","version":11},{"created_at":"2026-06-10T07:25:57Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2680df062bf4e4e3f3887e2c123e35312f4e17d1495485bedd04e82dfab30d46","version":2}]}