{"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-61n5fg2y","versions":[{"created_at":"2026-06-10T22:52:42Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20821160 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3c71ad55349af85cbdab4ae3dbda75c6c6c339e53f1b0e4758017b97dc43b3cf","version":13},{"created_at":"2026-06-10T15:19:00Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b1c4e5b49d350e9770bba58ead9278b4a7ce71bb96caf80eaef9a471fe15409b","version":5}]}