{"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-e5m5s1wp","versions":[{"created_at":"2026-06-10T22:54:29Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21473216 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ad1be5328c7ded18dcf7e232e006eeb82fb596c97ae76a7d01c9c7ce5c127827","version":10},{"created_at":"2026-06-10T17:39:38Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7a5fefa8955c53935873e7701b86825645e78a1ad266dc608bf06c640e61b81c","version":3}]}