{"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-eo5pwu3b","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21693331 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1cd09f03ef7097bb700e2f84777fbeab88d373df0a1cdb272902c2cdec4746fc","version":12},{"created_at":"2026-06-10T15:53:06Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"532d3ccfd5871a989439c3e9f72d53d4c86c68acfbb3347f3bfe913fe2f1a52a","version":4}]}