{"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-8twdy45t","versions":[{"created_at":"2026-06-10T22:52:46Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote22616301 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"35c60562e120e36f84f598518289f825df28a2c46dc0695b32ff7cdfacf661ff","version":11},{"created_at":"2026-06-10T15:53:07Z","element_count":85,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d39bf8565cc184597cd085ee52a4d63da741a7340a007758f78314a382c3f8a5","version":3}]}