{"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-8maq4apn","versions":[{"created_at":"2026-06-10T22:56:50Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"598a6892a62e1136763f8f682b7085dfbe48eddb86ca3523a0f7e1a555c09c46","version":10},{"created_at":"2026-06-10T19:02:37Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"591519640fb3e5c9168fe0d0c9b25eb8094051a74fba26b434c9491104ceb8f8","version":3}]}