{"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-lk2wlqnq","versions":[{"created_at":"2026-06-10T22:59:11Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy52954560→quote23345656 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"dfa81517f90a4d394b7928f292d3d4d850b4754ba7bec8b7908bf04ab4b11134","version":9},{"created_at":"2026-06-10T20:22:38Z","element_count":73,"note":"5軸GA polish 60->92 by M5 (autonomous)","saved_by":"mcp","sha256":"473ab1786601124247b7c5af017485555daddcc5233b41e0c0c6a3fc4f6fe72c","version":2}]}