{"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-4472d6zz","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21000231 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e2ea92dfa5850630fbcebfb1224b1e1f44f87b864724f4d72a4fe74c7a817990","version":15},{"created_at":"2026-06-10T14:45:53Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"82c1911fe06d004d74f8d4fc6096c2a0f9606a7470c9092a497bfac3bd771078","version":6}]}