Purpur Sentinel

Passive, explainable movement-pattern observation for Purpur servers.

Sentinel gives permitted operators bounded evidence of repeated suspicious on-foot horizontal movement, contextually impossible ground speed, and sustained unauthorized unsupported flight. Contextual ground-speed evidence uses server-authoritative movement attributes, locomotion state, and Speed/Slowness effects while retaining conservative geometry and lifecycle exclusions. It does not cancel movement, change flight permissions, punish players, persist player evidence, or export telemetry.

Development

Requires Java 25 and Node.js 20.

./gradlew clean check jar

The output JAR is written to build/libs/. Production installation and deployment are separately gated operations.