Subscription, payment, quota, and refund operations. Reading subscription state, extending users, granting quota, looking up payment history.
Review code in the vpn-bot-refactor project; optionally land the change via git push
Runbook for mass outages — prod down, en-masse client disconnects. Order of triage, who to notify, how to roll back.
Server administration — Docker, systemd, logs, certs, SSH between nodes, and git operations on the deployed repo
VPN infrastructure ops — Xray nodes, X-UI panel, traffic, client configs, and entry↔exit failover diagnostics