# Slimefun/Slimefun4

Slimefun 4 - A unique Spigot/Paper plugin that looks and feels like a modpack. We've been giving you backpacks, jetpacks, reactors and much more since 2013.

Repository: https://github.com/Slimefun/Slimefun4
Canonical: https://ross.abutalabs.com/products/slimefun4
Language: Java
License: GPL-3.0
License Family: copyleft
Topics: java, plugin, minecraft, slimefun, modpack, mods, bukkit, spigot, survival, spigotmc, paper, papermc, modded, open-source, hacktoberfest
Last push: 2026-08-08T07:51:05+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 96, release rhythm 8, longevity 100
- inputs: {"age_days": 4484, "days_push": 25, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1126, forks 657 (observed 2026-08-28T04:03:41.160621+00:00)

## What it is
Slimefun 4 is a Spigot/Paper Minecraft server plugin that adds a modpack-like experience with over 500 items and recipes, including backpacks, jetpacks, reactors, magic altars, and power grids, without requiring client-side mods. It has been actively developed since 2013 and supports a large ecosystem of addons.

## Use cases
- add modpack-style content to a vanilla Minecraft server
- give players jetpacks and backpacks without installing mods
- add machines and an electric power grid to survival gameplay
- extend a Spigot or Paper server with tech and magic items
- let players choose between magic and tech progression on a server

## When to choose
- you run a Spigot or Paper server and want mod-like content without client mods
- you want a large, mature plugin with an active community and addon ecosystem
- you want players to opt into tech or magic content individually

## When to avoid
- you run a vanilla server or a server platform other than Spigot/Paper
- you want actual client-side mods rather than server-side plugins
- you need content for Minecraft versions outside 1.16-1.20

## Facets
- artifact type: plugin
- maturity: active
- function: game, plugin-system
- domain: gaming-tools
- platform: jvm, self-hosted
- tags: spigot, papermc, bukkit, modpack-like, survival, tech-and-magic-items, minecraft, game-development

## Member repositories
- Slimefun/Slimefun4 (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:41.160621+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:39:11.024220+00:00, confidence not recorded.
  - readme: https://github.com/Slimefun/Slimefun4 (fetched 2026-08-28T04:03:41.160621+00:00, sha 32ee8464baff)
- Data as of 2026-08-30T08:39:29.467469+00:00.