User reported NoClassDefFoundError: net/minecraft/class_7471 on MC 26.1.2.
Root cause: v1.1.1 was built for 1.21.6 intermediary, which uses
class_NNNN obfuscated names. MC 26.x ships an unobfuscated server jar
with Mojang names directly, so intermediary lookups for class_7471
(=PlayerChatMessage in 1.21.6) fail at runtime.
Build retargeted to 26.1.2:
- minecraft 26.1.2 / loader 0.19.2 / fabric-api 0.148.2+26.1.2
- Loom 1.16-SNAPSHOT, Shadow 9.4.1 (Java 25 bytecode support)
- Gradle 9.5.1, JDK 25 toolchain
- Drop officialMojangMappings(); use intermediary:0.0.0 identity
(Mojang stopped publishing proguard mappings for 26.x).
- Adapt code: ServerPlayer.getServer() removed in 26.1.2 → use
player.level().getServer() (ServerPlayer.level() returns ServerLevel).
- NeoForge dropped from this build — moddev plugin can't parse 26.1.2
yet, falls back to 1.21.5.
- 1.2.0 = Fabric only; 1.21.6 users stay on 1.1.1.
Hooks ServerMessageEvents.ALLOW_CHAT_MESSAGE to intercept chat while the
music_quiz datapack is in answer-accepting state (init=5 on objective
'main'). Intercepted messages are forwarded to mq:answer/submit with the
player's UUID context and the chat broadcast is suppressed so the answer
stays hidden from other players. Outside that state chat passes through
normally.
Target: Minecraft 1.21.6+, Java 21, Fabric Loader 0.16+, Fabric API.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
