{"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-9fizk2c2","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21590573 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4458d55459acd612b5941dbcbdcaeded7a8b8f4d3906c00c187945ca0ce34e93","version":12},{"created_at":"2026-06-10T15:53:05Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"272f0ac70dc703741383eb61b511a692ec21f699752df21509c9e0ceb504654c","version":4}]}