String Duper Fix

String Duper Fix restores classic tripwire string farms on modern Paper servers with bounded, event-driven checks. It runs entirely on the server; players do not need a client mod.

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Highlights

• Restores shears-based tripwire disarming and supported hook-to-hook string farms.
• Supports pistonless, lever-controlled builds.
• Uses bounded, event-driven checks instead of permanent world or chunk scans.
• Provides English, German, French, and Spanish player messages automatically.
• Includes persistent personal sound controls.
• Contains no telemetry, network requests, NMS, reflection, or dependencies.

Commands

• /stringduper on|off|status
• /stringduper sounds — toggle sounds for yourself
• /stringduper sounds on|off — set your persistent personal preference
• /stringduper sounds status — inspect your sound status (admin/OP only)
• /stringduper reload

Personal sound on/off commands are available to every player and only affect that player. Mechanic controls, reload, and both status commands require stringduper.admin (OP by default).

Compatibility

• One JAR for Minecraft 1.21.2 through 26.3
• Paper and compatible forks
• Java 21+ on 1.21.x; Java 25+ on 26.x
• Server-side only

Mojang fixed native tripwire string duplication in Java 1.21.2. The JAR is compiled against Paper API 1.21.1 for 1.21.2-compatible forks. Direct official Paper boot tests start with 1.21.3 because Paper did not publish a separate 1.21.2 server JAR.

Privacy and license

No telemetry or network requests. Open source under the MIT License.