{"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-6534j20u","versions":[{"created_at":"2026-06-10T22:57:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy52954560→quote20424136 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"efcb62215dcb201e934d7b2cc7d0d7520a3b8524cc42727523504d70cee236a4","version":9},{"created_at":"2026-06-10T19:34:26Z","element_count":72,"note":"5軸GA polish 56->90 by M5 (autonomous)","saved_by":"mcp","sha256":"64a307785abdb06b9c8f5c12e266a7fbbf02f728b6b7a6db6b04866fd718326a","version":2}]}