{"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-bramleygrangehouse-rio9qgya","versions":[{"created_at":"2026-06-10T22:53:41Z","element_count":85,"note":"legacy fix: jpy90050184→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"09d7c2c58c3739ba48941167b8b024c9f8b02784e921e88589ec3e7931094c8c","version":10},{"created_at":"2026-06-10T16:55:14Z","element_count":90,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cf5dd5c875f2e8f3507792014209b4cb171199a0682845628aee546d8e582a82","version":2}]}