{"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-z78vzkon","versions":[{"created_at":"2026-06-11T01:05:14Z","element_count":72,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"16c136cbb3998aa5ca14b02c4f74285cb6533cfef827e11a8e582dfd15c07f15","version":16},{"created_at":"2026-06-10T23:10:42Z","element_count":50,"note":"legacy fix: jpy45030000→quote17714989 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5ce916d664700c2221d268621c1447f21ccc69a3516bd6dc35f260030e63f03e","version":8},{"created_at":"2026-06-10T22:11:00Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"df85a255fb4b998d705dace81ebeb30c7ece12c91237dcc30682a18551e176fa","version":2}]}