Echo Protocol

Added

• Stage 3: The Original
• Independent Original Echo behavior
• Familiar-location tracking
• Bed, storage, crafting, furnace, doorway, portal, and idle-location markers
• Observing, inhabiting, recognizing, replacing, confronting, and leaving states
• Rare replacement events in familiar locations
• Optional target-only Original text events
• Optional non-lethal confrontation damage
• New administrator commands
• Five new Stage 3 advancements
• Persistent Stage 3 progress and cooldowns

Improved

• Late-game psychological horror progression
• Safe Echo positioning
• Familiar-location tracking
• Server-authoritative multiplayer privacy
• Persistence of event counters and familiar locations

Known Limitations

• The Original uses scripted movement rather than advanced navigation
• Familiar locations use bounded heuristics
• Old Mimic advancement progress is not imported retroactively
• Recorded movement routes are not saved across server restarts