{"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-m8is2keq","versions":[{"created_at":"2026-06-10T22:54:21Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"41e1190eab634bdacb38f93e6d98ce62d02a52ed37c71c80e8d5325d9cf787c6","version":10},{"created_at":"2026-06-10T17:23:09Z","element_count":89,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"c395d5c2b54fc40ef16b00b89c61f9d20ffcaf3a7449222aa3221e702a3376f9","version":2}]}