Arc Lib
ModA library other mods need to add actions, conditions, and rewards.
Why gradeA
How grades workStrengths
Points lost
No points lost.
All 11 criteria
Maintenance
Full points27 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.6 weeks ago (12 Sep 2026) 12 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.26.2 on Fabric and NeoForge, 1.20.1 on Forge. 72% of the 718 popular Fabric mods updated in the last 6 months also have files for 26.2. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 16 of the last 24 months 6 / 6Stability
Full points22 / 22Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.26 of the 356 modpacks with two or more versions removed it in a later one (7%) 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.No quick fix in 2 years 7 / 7Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
Full points10 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · DAQEM/ArcLib 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · DAQEM/Arc 3 / 3Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.1,250,072 4 / 4Track record
Full points8 / 8AgeHow long the project has existed. It counts less when no new file came out recently.3.3 years, 231 releases 8 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 18 latest files for recent Minecraft versions. See Security
70.6 of the 71 points that apply = 99 out of 100. The points above are rounded to whole numbers.
About
Arc Lib is a Minecraft library for mod developers that lets them define gameplay actions, conditions, and rewards through datapack JSON rather than implementing each behavior from scratch. Actions respond to events such as breaking or placing blocks, crafting or using items, and player movement; conditions then filter whether the configured rewards are granted. Conditions can check details such as the block or item involved, an entity’s attributes, the player’s location, or game state, while rewards can grant items, experience, or effects. For example, a developer can configure a block-breaking action to give a diamond when a player mines stone, with all listed conditions required by default unless an OR condition is used. The default player action holder supports actions that remain active for players, and developers can add custom holders for specialized systems such as job- or power-up-specific actions.
Written from Modrinth . How we write it
In-game changes
Changes the game's code in 6 areas, as a library other mods build on: Inventory and itemsChanges 14 game code files in this area: items, chests and other containers, crafting and enchanting., Mobs and their behaviorChanges 5 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., PlayerChanges 4 game code files in this area: your character: movement, abilities, hunger and controls., Blocks and fluidsChanges 2 game code files in this area: how blocks, fluids and redstone work., User interfaceChanges 1 game code file in this area: menus, screens, tooltips, the chat window and the in-game overlay. and Game data and resourcesChanges 1 game code file in this area: recipes, tags, advancements, language files and other game data..
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creator
- DAQEM Studios
- License
- Apache License 2.0
- Downloads
- 1.3M
- Created
- 4 Jul 2023
- Official pages
- Modrinth , CurseForge
- Links
- Source code , Issues , Wiki , Discord
Security
No harmful code found
We checked its files and read their code, without running it.
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.22 latest files: the newest file for each Minecraft version and loader. The answer above is about the 18 for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Looked for, not foundWe looked for these in the file and did not find them.The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
- Modrinth and CurseForgeA release with a different file on Modrinth and on CurseForge, whose code is not the same. Each file is checked on its own. Nothing is blocked.Minecraft 1.20.1 · Forge · release 1.3.3 · 11 Nov 2023: Modrinthcode differs in 1 release
arc-1.3.3-forge.jar, CurseForgearc-1.3.3-forge.jar. 12 classes changed, 12 classes only in the CurseForge file, 18 classes only in the Modrinth file, in com.daqem.arc:Arc,AbstractCondition,ICondition,AbstractReward,IReward,ArcCommand,ActionManager,ItemReward$Serializer,ItemReward,SideProxyForge,MixinServerPlayer,ClientboundActionScreenPacketand 30 more.
Privacy
We found nothing it sends
We read its code without running it: it contacts no web address while you play.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of all 18 files, for recent Minecraft versions. See each file in Releases
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
No sign that AI was used to make it
We looked for AI tools in its texts, files, images and code history and found none.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content or AI features declared.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Nothing found
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found40 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found10 images read
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file477 code files read
Compatibility
See all 231 filesPoint at or tap a version to see its loaders.
Related projects
Projects that need Arc Lib to work.
Modpacks using this project
Find modpacks with it| Oct 2024 | 18 |
|---|---|
| Nov 2024 | 17 |
| Dec 2024 | 11 |
| Jan 2025 | 17 |
| Feb 2025 | 23 |
| Mar 2025 | 32 |
| Apr 2025 | 34 |
| May 2025 | 41 |
| Jun 2025 | 34 |
| Jul 2025 | 22 |
| Aug 2025 | 25 |
| Sep 2025 | 25 |
| Oct 2025 | 38 |
| Nov 2025 | 27 |
| Dec 2025 | 43 |
| Jan 2026 | 49 |
| Feb 2026 | 45 |
| Mar 2026 | 45 |
| Apr 2026 | 47 |
| May 2026 | 61 |
| Jun 2026 | 51 |
| Jul 2026 | 48 |
| Aug 2026 | 48 |
| Sep 2026 | 36 |
More modpacks put it in their new versions than a year ago: 49 a month now, 30 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..
612 modpacks include Arc Lib in at least one of their versions. Here are the 30 most downloaded.
Better Adventures+2.2M downloadslast version with it 7 Oct 2026
Better MC Skyblock [BMCS]252K downloadslast version with it 3 Jun 2025
Fantasy Skies117K downloadslast version with it 19 Jan 2024
A COZY Adventure NapTime Modpack, The Lil Cafe114K downloadslast version with it 4 Dec 2025
World Terra83K downloadslast version with it 29 Sep 2026
Medieval Immersed78K downloadslast version with it 25 Aug 2026
Craftoria 2 - Worlds Beyond67K downloadslast version with it 25 Aug 2026
Back to Back47K downloadslast version with it 3 Jul 2024
POKEFUN Server - The Ultimate Pokemon Adventure [Cobblemon]33K downloadslast version with it 18 Sep 2026
Path of the Ascended30K downloadslast version with it 4 Mar 2026Often in the same modpacks
Mods that modpacks often add together with Arc Lib. Share: how many of the modpacks with Arc Lib also have that mod.
AmendmentsAModin 49% of the modpacks with Arc Lib
Macaw's FurnitureBModin 43% of the modpacks with Arc Lib
Chat HeadsAModin 43% of the modpacks with Arc Lib
Towns and TowersBModin 42% of the modpacks with Arc Lib
Macaw's RoofsAModin 42% of the modpacks with Arc Lib
Macaw's TrapdoorsAModin 42% of the modpacks with Arc Lib
AttributeFixAModin 42% of the modpacks with Arc Lib
Macaw's Lights and LampsBModin 41% of the modpacks with Arc Lib
ChippedCModin 41% of the modpacks with Arc Lib
HandcraftedCModin 40% of the modpacks with Arc LibLatest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.