minecraft-modpack-server

A setup guide for running a Minecraft server with community-made modpacks from CurseForge or Modrinth. It covers server software such as Forge and NeoForge.

In plain words
What is it for?
Use it to configure a modded Minecraft server, including its name, world seed, difficulty, game mode, player access, memory, view distance, PvP, whitelist, and backup schedule.
Why use it?
It removes the guesswork from turning a modpack download into a working multiplayer server. It also helps choose settings for players, hardware, performance, and backups.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/starrycod/cogitum/minecraft-modpack-server
Any agent
npx skills add StarryCod/cogitum --skill minecraft-modpack-server
Clone the repo
git clone --depth 1 https://github.com/StarryCod/cogitum

Made for: Claude Code, Codex.

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,851 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
Origin 97% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00019 $0.01851
Opus 5 $0.00010 $0.00925
Sonnet 5 $0.00004 $0.00370
Haiku 4.5 $0.00002 $0.00185

Measured 2d ago against content hash 858f64c0e67e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

minecraft-modpack-server scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Minecraft 1.21+ → Java 21: `sudo apt install openjdk-21-jre-headless`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

wget -O serverpack.zip "<URL>"
Origin

This is a copy

97% identical to minecraft-modpack-server — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

cogitum/data/skills/gaming/minecraft-modpack-server/SKILL.md · 188 lines

How it starts

The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Minecraft Modpack Server Setup

When to use

  • User wants to set up a modded Minecraft server from a server pack zip
  • User needs help with NeoForge/Forge server configuration
  • User asks about Minecraft server performance tuning or backups

Gather User Preferences First

Before starting setup, ask the user for:

  • Server name / MOTD — what should it say in the server list?
  • Seed — specific seed or random?
  • Difficulty — peaceful / easy / normal / hard?
  • Gamemode — survival / creative / adventure?
  • Online mode — true (Mojang auth, legit accounts) or false (LAN/cracked friendly)?
  • Player count — how many players expected? (affects RAM & view distance tuning)
  • RAM allocation — or let agent decide based on mod count & available RAM?
  • View distance / simulation distance — or let agent pick based on player count & hardware?
  • PvP — on or off?
  • Whitelist — open server or whitelist only?
  • Backups — want automated backups? How often?

Use sensible defaults if the user doesn't care, but always ask before generating the config.

Steps

1. Download & Inspect the Pack

mkdir -p ~/minecraft-server
cd ~/minecraft-server
wget -O serverpack.zip "<URL>"
unzip -o serverpack.zip -d server
ls server/

Look for: startserver.sh, installer jar (neoforge/forge), user_jvm_args.txt, mods/ folder. Check the script to determine: mod loader type, version, and required Java version.

2. Install Java

  • Minecraft 1.21+ → Java 21: sudo apt install openjdk-21-jre-headless
  • Minecraft 1.18-1.20 → Java 17: sudo apt install openjdk-17-jre-headless
  • Minecraft 1.16 and below → Java 8: sudo apt install openjdk-8-jre-headless
  • Verify: java -version

3. Install the Mod Loader

Most server packs include an install script. Use the INSTALL_ONLY env var to install without launching:

cd ~/minecraft-server/server
ATM10_INSTALL_ONLY=true bash startserver.sh
# Or for generic Forge packs:
# java -jar forge-*-installer.jar --installServer

This downloads libraries, patches the server jar, etc.

Read the full file on GitHub · 188 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 188 lines · 19 tokens per session scan B 858f64c0e67e

Subscribe to this mod's changes

minecraft-modpack-server is a skill published in the GitHub repository StarryCod/cogitum (11 stars, last pushed 3mo ago), licensed MIT. It adds 19 tokens to every session and 1,851 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). It is 97% identical to minecraft-modpack-server, differing in 3 lines, and is treated as a copy.