Lag Doctor 0.3.0 — Paper 26.3 beta

Lag Doctor 0.3.0 — Paper 26.3 beta

Created by William Liu (@starchlorddotcom), with substantial AI assistance.

This compatibility release targets Paper 26.3 and Java 25+. It pins the Paper API to 26.3.build.143-beta and updates the plugin descriptor, Java bytecode, local demo and documentation. Commands, configuration and diagnostic behavior are unchanged.

Install

Stop Paper 26.3, remove any older LagDoctor JAR from plugins/, add LagDoctor-0.3.0.jar, and restart using Java 25+. Keep your existing configuration. Run /ld report after about a minute.

For Paper 1.21.11, keep using LagDoctor 0.2.0. Other Minecraft versions, Spigot and Folia are not supported. Paper 26.3 itself is currently beta; back up and test separately before upgrading a world.

Verified

All 18 automated tests pass. A fresh local Paper 26.3 build 143 server verified plugin loading, tick reports, two-entity scan counts, concurrent-scan rejection, scan cancellation, redacted and location-enabled exports, overlapping-baseline rejection, spike detection, incident recovery and before/after comparisons. The test server was stopped cleanly. Large-server overhead and player-client interactions are not validated.

Source

Download the attached LagDoctor-0.3.0-source.zip for the complete 0.3.0 source, Gradle wrapper, tests, updated documentation and sample reports. The repository currently stores source in release ZIPs; GitHub's automatically generated Source code archives are not the complete 0.3.0 source package.

No telemetry, subscriptions or automatic world changes. Heuristic evidence does not prove lag causes. MIT licensed.