Mod Detector Plugin

Added

• Per-Session Mod Tracking

  • Each session now records which mods the player was using
  • /md info displays the full mod list for each session
  • Useful for tracking mod usage changes over time

• Delta Compression for Sessions

  • Sessions use smart delta compression to minimize storage
  • First session stores full mod list
  • Subsequent sessions store only changes (added/removed) if < 3 mods changed
  • Large changes (3+ mods) trigger a new full snapshot
  • Unchanged sessions store only time data

• Enhanced /md info Display

  • Shows firstSeen timestamp
  • Shows total playtime formatted (e.g., "1h 30m")
  • Sessions display reconstructed mod list with duration

Changed

• Storage Efficiency
  • Typical player with same mods across 100 sessions: ~3KB (was ~25KB)
  • ~88% reduction in storage for players with stable mod configurations
  • Backwards compatible with existing data (old sessions show as-is)

Example Detection Entry

{
  "uuid": "f999e944-a15d-4287-bff4-34f63a97832e",
  "username": "PlayerName",
  "mods": ["Simple Voice Chat", "Jade", "Minimap"],
  "channels": ["unknown:channel"],
  "firstSeen": "2026-01-16T17:28:01Z",
  "lastSeen": "2026-01-18T12:00:00Z",
  "totalTimePlayedSeconds": 3600,
  "sessionCount": 4,
  "sessions": [
    {"joinTime": "2026-01-16T17:27:59Z", "leaveTime": "2026-01-16T17:30:00Z", "durationSeconds": 121, "mods": ["Jade", "Voice Chat"]},
    {"joinTime": "2026-01-17T10:00:00Z", "leaveTime": "2026-01-17T10:30:00Z", "durationSeconds": 1800, "added": ["Minimap"]},
    {"joinTime": "2026-01-17T14:00:00Z", "leaveTime": "2026-01-17T14:20:00Z", "durationSeconds": 1200},
    {"joinTime": "2026-01-18T12:00:00Z", "leaveTime": "2026-01-18T12:08:00Z", "durationSeconds": 479, "removed": ["Jade"]}
  ]
}