{"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-h8ll9b0i","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20556188 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6a7154f992ebefad5705e23d29582bfa7951d44e2064a08a18c093063de7b632","version":11},{"created_at":"2026-06-10T15:53:07Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2a7d43d765a1157573c996fe4ea1452d72720edb599722dfeeb2f5504b8fddb0","version":3}]}