{"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-8aryngda","versions":[{"created_at":"2026-06-10T22:58:01Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote24058999 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b440662e33423a2db5844ce7a1186a82894e1c141fedf9c5b1448e4d834559c3","version":9},{"created_at":"2026-06-10T19:51:09Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"03f1dd94a89a833cefd3cd15b3dd5e4b086998c972152b140247c15dc188d4f2","version":2}]}