Caduceus

A Clojure-based Hex Casting addon for advanced meta-evaluation.

10.3K Downloads

fabricforgecursed

Rent Server with this Mod

Screenshots

Delimited continuations with Arke's Gambit

About this Mod

Caduceus

CurseForge | GitHub

A Clojure-based Hex Casting addon for advanced meta-evaluation. Created for HexJam 2025.

Features

Adds the following meta-evaluation features:
- Delimited continuations
- Continuation marks
- Jump iota manipulation
- Improved jump iota display
All non-mixin code is written in Clojure.
On Fabric, support is automatically added for third-party continuation frame types by scanning the classpath and generating a mixin at runtime with a dynamic targets list.

Attribution

Icon: SamsTheNerd (GitHub, Modrinth)

Available Versions

v0.2.1+1.20.1 [Fabric]release

MC 1.20.1fabric

January 16, 2026

v0.2.1+1.20.1 [Forge]release

MC 1.20.1forge

January 16, 2026

v0.2.0+1.20.1 [Forge]release

MC 1.20.1forge

January 4, 2026

v0.2.0+1.20.1 [Fabric]release

MC 1.20.1fabric

January 4, 2026

v0.1.1+1.20.1 [Forge]release

MC 1.20.1forge

June 30, 2025

How to Install Caduceus 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 (1.20.1).

Install Mod

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

Compatibility

Mod Loaders

fabricforge

Minecraft Versions

1.20.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Caduceus 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 (1.20.1). You can switch loaders with one click in the panel.

Is Caduceus compatible with fabric and forge?

Caduceus officially supports fabric, forge for Minecraft 1.20.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Caduceus – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Caduceus 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.