{"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-h4a415zj","versions":[{"created_at":"2026-06-10T22:53:20Z","element_count":47,"note":"legacy fix: rooms設備語除去 / jpy47104992→quote19725193 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d7373e43a02876731bb52aff6ea6cdbf8952c8740de6bb24982b57b094d95352","version":10},{"created_at":"2026-06-10T16:55:06Z","element_count":52,"note":"5軸GA polish 60->89 by M5 (autonomous)","saved_by":"mcp","sha256":"d26cddefe367e3725eadd5d4f09bc16e36d6288d15a1062ac60ddab169a4d7b9","version":2}]}