{"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-6au1xt55","versions":[{"created_at":"2026-06-10T22:59:01Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy54927201→quote24058999 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f5a8ae26c4e950f09a24ef058f9fd93e898a68c39d53fc1aecde149cb7e8e805","version":9},{"created_at":"2026-06-10T20:22:40Z","element_count":90,"note":"5軸GA polish 56->94 by M5 (autonomous)","saved_by":"mcp","sha256":"38d27f50c3689e4bacb4ad7c375fdb7f3defc948fdd4789a87d63072ecbaa40d","version":2}]}