Codex
Codex allows you to gain information and do quick calculations in a Satisfactory-style codex screen.
Currently, the mod is a proof of concept - but it is being actively developed.
I wouldn't consider it a replacement for Roughly Enough Items or Too Many Items - as those mods are more focused on the data part of the items.
Codex is more useful if you want to figure out what to do with an item, not how.
Setup
Codex will guide you through it's setup screen when you launch the game for the first time with the mod:

These data sources are from the data repository - and respect the license of the source.
Showcase
Quickmath Parser
The quickmath parser allows you to quickly evaluate arithmetic expressions. This is especially useful for technical minecrafters - as it allows you to calculate various things such as shulker box capacity/redstone tick math using built in functions.

The quickmath parser also supports:
Quickmath Functions And Constants
Functions
stacksin(shulkers) = shulkers * 30shulkersof(stacks) = stacks / 30stacksof(items) = items / 64itemsof(stacks) = stacks * 64secsin(ticks) = ticks / 20ticksin(secs) = secs * 20
Constants
STACK = 64SHULKER = 1920DAY = 72 * 24000HOUR = (72 * 24000) / 24MIN = (72 * 24000) / 24 / 60SEC = (72 * 24000) / 24 / 60 / 60MS = (72 * 24000) / 24 / 60 / 60 / 1000MC_DAY = 24000MC_HOUR = 24000 / 24MC_MIN = 24000 / 24 / 60MC_SEC = 24000 / 24 / 60 / 60MC_MS = 24000 / 24 / 60 / 60 / 1000
Quicksearch
The quicksearch functionality allows you to quickly search for items - you can scroll the searchbar by dragging outside the list or using your scrollwheel.
Clicking on a search element opens it's codex page.

Item descriptions are from the sources you chose during codex setup.
Contributing
Want to add support for your mod? Check out the data repository which stores all the item descriptions and other miscelaneous content.
PS: The mod is All Rights Reserved currently as I do not see it fit for contributions. The data branch of the repository though is licensed by-file, not entirely as a whole. Please see _index.json for licensing of sources.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.19.3
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as codex-b0.1.0+1.19.3.jar — drop this file into the mods folder
- Download size: 1.4 MB
- Download link checked 7 Sept 2026 — working
These come from our own check of the pack file, not from the source page.


