{"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-mmiiggkp","versions":[{"created_at":"2026-06-10T23:00:18Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20954809 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"be5b0e3f70199eed44bc79b91556c103ee37f5007c744c31585723c131bcc1f3","version":9},{"created_at":"2026-06-10T21:11:29Z","element_count":83,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9c8627887952abae5a1be5404951208bb092f3e7efe41a36e09e1a34c99cf863","version":3}]}