Book of Unlearning

Reset your Skill Trees from Puffish Skills!

1.6K Downloads

fabricutility

About this Mod

A simple mod that adds a book to reset any skill trees that may come from mods or datapacks as long as you've put points into them for Pufferfish's Skills.

Config to disable specific skill trees from appearing: config/book_of_unlearning.json

{
  "blacklisted_skill_trees": [
    "cleanntree:respec"
  ]
}

Dependency:

Pufferfish's Skills

Available Versions

Book of Unlearning 1.0.1release

MC 1.21.1fabric

June 4, 2025

Book of Unlearning 1.0.0release

MC 1.21.1fabric

May 22, 2025

How to Install Book of Unlearning on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).

Install Mod

Open the mod browser in the dashboard and search for "Book of Unlearning". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Book of Unlearning server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Book of Unlearning compatible with fabric?

Book of Unlearning officially supports fabric for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Book of Unlearning – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Book of Unlearning consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.