Echo Protocol

# Echo Protocol 0.5.0-beta.2 — The House Remembers

 > You were never the only thing being recorded.

 This is the first beta release of Echo Protocol and a major update from 0.4.1-alpha.

 ## Highlights

 - Added persistent per-player Echo memory
 - Added the Room Memory Graph
 - Added generated Memory Threads with 2–4 connected events
 - Added seven forms of contradictory memories
 - Added memory contamination and observation profiles
 - Added four intensity presets: Subtle, Standard, Intense, and Custom
 - Added new hidden advancements and English/Russian localization
 - Added new operator commands for memory, threads, contradictions, contamination, and presets

 ## The House Remembers

 The world can now remember familiar rooms, routes, sounds, habits, Panic Imprints, and significant events.

 Memory Threads connect these fragments into short generated sequences involving:

 - Memory and False Memory Echoes
 - Audio Residue
 - Peripheral Echoes
 - Panic Imprints
 - Contradictory memories
 - The Original

 Memory Threads are generated experiences rather than fixed quests or a scripted campaign.

 ## The Original

 The Original now has improved behavior and presentation:

 - Visible administrative event spawning
 - Faster walking and distinct running behavior
 - Acceleration, braking, approaches, and retreats
 - Improved body and head tracking
 - Door-aware local route planning
 - Observation-aware pauses and reactions
 - More expressive Waiting, Your Bed, Confrontation, Already Home, and Empty Room events
 - Short-lived spectral block-placement actions

 Moving Echoes can visually open nearby doors. Replayed block-use actions may also create temporary spectral blocks.

 These effects are visual-only and automatically restore. They do not permanently modify the world.

 ## Event Director 3.0

 The Event Director now considers:

 - Event history and repetition
 - Current danger and combat state
 - Active Memory Threads
 - Safety and loaded chunks
 - Event cooldowns
 - Contamination
 - Observation style
 - Actual spawn success

 Failed events no longer incorrectly consume progression or create stale event locks.

 ## Persistence

 Echo Protocol now uses versioned, bounded server-side persistence.

 Existing 0.2–0.4.1 progression data can be imported while preserving valid:

 - Stage progression
 - Cooldown delays
 - Familiar locations

 The mod does not persist complete movement recordings.

 ## Multiplayer and Privacy

 - Persistent memories, room graphs, threads, profiles, and contamination remain server-side
 - Private Echoes are restricted to their target when `shared_echoes=false`
 - Private sounds, particles, text, and spectral block reactions remain target-only
 - The mod never records microphones, voice chat, IP addresses, private messages, or container contents

 ## Configuration

 Added new configuration options for:

 - Persistent memory limits
 - Room Memory
 - Memory Threads
 - Contradictory memories
 - Contamination
 - Observation profiles
 - Intensity presets
 - Thread-aware events

 Existing valid configuration values and unknown fields are preserved where possible.

 The legacy default Original movement speeds are automatically upgraded. Custom movement speeds remain unchanged.

 ## Requirements

 - Minecraft Java Edition 1.21.1
 - Fabric Loader 0.16.14 or compatible
 - Fabric API 0.116.13+1.21.1
 - Java 21

 ## Beta Notice

 This is a beta release. Back up important worlds before installing.

 Automated tests, clean builds, and dedicated-server startup have passed. Some multiplayer and subjective visual scenarios still require additional real-client testing.