{"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-o0o3ywjb","versions":[{"created_at":"2026-06-10T23:00:28Z","element_count":54,"note":"legacy fix: rooms設備語除去 / jpy53284740→quote17927991 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"320b685a31774442d7050faeb8134a1f1702281a7c5da77dc83dcbe4b1fe8425","version":9},{"created_at":"2026-06-10T21:27:55Z","element_count":56,"note":"5軸GA polish 61->92 by M5 (autonomous)","saved_by":"mcp","sha256":"a1d24a1c4a9979728e4622a23b87fe45472e5cbcec6e2e401424b758035d6726","version":3}]}