Fix Bug

Changelog

All notable changes to this project will be documented in this file. This project adheres to Keep a Changelog and Semantic Versioning (when applicable).

Added

• Name Registry to record names that have successfully verified as premium (name -> premium UUID).
• Policy: knownPremiumDenyOffline — once a name verifies as premium, deny offline fallback for that name on future failures.
• Policy: allowOfflineForUnknownOnly — allow offline fallback only for names that have never verified as premium.
• Recent IP Grace window (configurable TTL) to temporarily allow premium session if same name+IP recently verified.
• Admin command: /trueuuid link <name> with dry-run and backups to migrate/merge offline data to the premium UUID.
• Short Title subtitles configuration: auth.offlineShortSubtitle, auth.onlineShortSubtitle.

Changed

• Configuration documented and expanded:
  • auth.knownPremiumDenyOffline = true
  • auth.allowOfflineForUnknownOnly = true
  • auth.recentIpGrace.enabled = true
  • auth.recentIpGrace.ttlSeconds = 300 (defaults)
• Improved user messaging: clearer offline fallback chat message.

Fixed

• Client sometimes only showed “Disconnected” without reason on Forge 1.20.1 login stage:
  • Server now explicitly sends Login and Game disconnect packets before closing to ensure the client displays the reason.

Notes

• Recent IP Grace is for usability, not strong security. Use a small TTL and avoid shared networks if possible.

A Forge 1.20.x mod that securely verifies premium accounts on an offline-mode server during the login phase, without sending the player's access token to the server.