{"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-yrpwpa7i","versions":[{"created_at":"2026-06-10T22:53:29Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy50261601→quote20965218 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"57c0b5338e42b07a15751c627ce8fb2324381aed832e8af3b52d60e0cf9c6383","version":10},{"created_at":"2026-06-10T16:55:06Z","element_count":89,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"4eda7223a249ee974b4e7641ada894caf57c760f1849434bfa3e1edcfe4ee8c5","version":2}]}