{"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-u4vdqo5w","versions":[{"created_at":"2026-06-10T22:56:12Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20790328 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"da4ac46ea27eaeada6bd8cc098fef51de8e48ca305a4e94d5bc9c5eab489eeae","version":10},{"created_at":"2026-06-10T18:29:56Z","element_count":74,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"095fa3acfaa08bd734e771e13ed11fe59830a1cab8b91e3859c75bb1675b3446","version":3}]}