Fabric mod generator for Minecraft 26.x

Fabric is a lightweight mod loader. It starts fast, follows new Minecraft releases closely and keeps its core small, leaving features to separate libraries. That is why it is usually among the first loaders ready on a new version, and why our generator selects it by default.

Most of the ecosystem sits on Fabric API, a library mod split into modules: events, registries, rendering hooks, commands, networking. Nearly every Fabric mod depends on it, so players install it once next to your mod.

Fabric is also the home of many client-side mods: HUD tweaks, info overlays, keybinds and other quality-of-life additions that need nothing on the server.

A Fabric mod talks directly to Minecraft's classes, and those classes need readable names. For years Fabric used its community Yarn names, but Yarn stops at 1.21.11. On the 26.x line, Fabric works with Mojang's official names.

This matters if you learn from older tutorials. Code written with Yarn names such as MinecraftClient or DrawContext does not compile on 26.x, and even ResourceLocation is now called Identifier. Our AI writes 26.x mods with the names that exist in the version you select.

Details also move between releases. On 26.3, keyboard input switched from GLFW to SDL, so key codes are not written the same way as on 26.2. The generator follows the version you picked instead of mixing APIs from different releases.

Every Fabric mod carries a fabric.mod.json at the root of its .jar. It is the mod's ID card: its ID, name and version, the classes Fabric runs at startup (the entrypoints) and the dependencies it needs.

The generator writes this file for you and pins the Minecraft dependency to the version you built for. If the mod lands on another version, Fabric stops with a readable incompatibility message instead of launching and crashing later.

The side you pick, client only, server only or both, is passed to the AI with your description, so client features such as a HUD stay in client code.

Fabric API covers common needs, but it cannot foresee everything. For the rest, Fabric mods use mixins. A mixin is a small class that tells Fabric: when Minecraft loads this method, insert my code at this exact spot. That is how mods change behavior no event exposes.

That precision is also a weakness. A mixin targets one method in one version, so a Minecraft update can break it. The rule most Fabric developers follow: use a Fabric API event when one exists, and keep mixins for what nothing else can reach.

Keep that in mind when you write a prompt. Describe the behavior you want, like “show a message when the player breaks a block”, rather than the technique, and let the code use the cleanest hook available.

Client-side mods are a natural fit: overlays with armor durability or a timer, a key that toggles an option, a client command that prints information. They work on any server, vanilla ones included.

Content mods work too: items, foods, tools and blocks registered through Fabric API. Those must be installed on the server and on every client, with Fabric API present on both.