Echo Protocol

Echo Protocol 0.5.0-beta.2 — Minecraft 1.21.9–1.21.10

Compatibility port of Echo Protocol 0.5.0-beta.2 — The House Remembers to Minecraft 1.21.9 and 1.21.10.

This release does not add new gameplay content. It brings the existing 0.5.0-beta.2 experience to newer Minecraft versions.

Changes

• Added support for Minecraft 1.21.9 and 1.21.10.
• Updated Yarn mappings and Fabric dependencies.
• Adapted Echo Protocol to Minecraft 1.21.9+ entity and world APIs.
• Updated version-specific rendering and networking compatibility.
• Preserved the modern Echo render-state system.
• Preserved translucent Echo rendering and player skin support.
• Preserved the stable UUID tracked-data implementation.
• Preserved server-authoritative multiplayer privacy.
• Preserved configuration and persistent memory compatibility.
• Verified Memory Echo, Corrupted Echo, Mimic Echo, False Memories, Peripheral Echo, Audio Residue and The Original.
• Verified dedicated-server and real-client startup on both versions.
• The exact same compiled JAR was tested on Minecraft 1.21.9 and 1.21.10.

Verification

• 50 automated tests: Passed
• Production build: Passed
• Minecraft 1.21.9 server/client: Verified
• Minecraft 1.21.10 server/client: Verified
• Representative gameplay: Verified
• Echo renderer: Verified
• No critical packet, mixin or runtime errors detected

Requirements

• Minecraft Java Edition 1.21.9 or 1.21.10
• Fabric Loader 0.19.3+
• Fabric API
• Java 21
• Install on both client and server for multiplayer