🔧 dataLib

Minecraft Java Edition 26.2 | Multiplayer-Safe | Pure Datapack

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Current version: v6.0.0

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Warning

This datapack is considered safe to use, but it is still actively receiving security improvements, bug fixes, and new features. Please keep it up to date.

Do not copy datalib:input or datalib:engine into your own datapack. It is an internal implementation detail and may change without notice between releases.

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Note

/reload is no longer required. dataLib initializes automatically, and player-targeted commands (such as tellraw @s) are executed when the first player joins the world.

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🛡️ This is a Minecraft Datapack — it contains no executables or scripts outside of .mcfunction files. Some antivirus software may flag .mcfunction files as suspicious due to macro-like syntax. This is a false positive. The pack has been scanned on VirusTotal and returned clean. Only download from this official repository. Do not trust redistributed or repackaged versions from third-party sources.

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📦 Installation

1. Place dataLib-v6.0.0 into <world>/datapacks/
2. /reload
3. /function dl_load:load/yes
4. /tag @s add datalib.admin
5. /scoreboard players set @a[tag=datalib.admin] dl.perm_level 3

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🏗️ Storage Architecture

datalib:engine  (persistent data)
├── global
│   ├── version: "v6.0.0"
│   └── tick: <int>
├── players
│   └── Steve { coins:150, level:5, xp:2300, online:1b, ... }
├── queue
│   └── [{func:"mypack:event/end", delay:100}]
├── cooldowns
│   └── Steve { fireball: 2460, dash: 1870 }  ← expiry ticks
└── events
    └── on_join: [{func:"mypack:welcome"}, {func:"mypack:xp_bonus"}]

datalib:input   (sending data to a function)
datalib:output  (receiving results from a function)

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🔍 Predicate Reference

Used with execute if predicate <id>.

Predicate	Description
datalib:is_survival	Player is in survival mode
datalib:is_creative	Player is in creative mode
datalib:has_empty_mainhand	Main hand is empty
datalib:is_full_health	Player is at full health (20 HP)
datalib:is_sneaking	Player is sneaking
datalib:is_sprinting	Player is sprinting
datalib:is_burning	Player is on fire
datalib:is_on_ground	Player is on the ground
datalib:is_daytime	Daytime (0–12000 ticks)
datalib:is_raining	It is raining
datalib:is_thundering	There is a thunderstorm
datalib:in_overworld	Player is in the Overworld
datalib:in_nether	Player is in the Nether
datalib:in_end	Player is in the End

Full reference: Predicate Reference

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📦 Dependencies

Lantern Load

Repository: https://github.com/LanternMC/load
License: BSD 0-Clause (public domain)

Provides deterministic load order, version tracking, and pre/load/post-load hooks.

# Check if dataLib is loaded
execute if score #dataLib load.status matches 1.. run say dataLib is loaded

# Get version (major*10000 + minor*100 + patch → v6.0.0 = 50000)
scoreboard players get dataLib load.status

StringLib

Repository: https://github.com/CMDred/StringLib
License: MIT

Bundled under the stringlib namespace. Exposed via datalib:core/lib/string/*.

Function	Description
lib/string/concat	Join a string array
lib/string/find	Find substring index
lib/string/replace	Replace substring
lib/string/split	Split by separator
lib/string/insert	Insert at index
lib/string/to_lowercase	Lowercase (A–Z, fast)
lib/string/to_uppercase	Uppercase (a–z, fast)
lib/string/to_number	String → numeric NBT
lib/string/to_string	Value → string

All functions read from datalib:input and write to datalib:output string.result.

data modify storage datalib:input string set value "Hello World"
data modify storage datalib:input find set value "World"
data modify storage datalib:input replace set value "Everyone"
function datalib:core/lib/string/replace
# datalib:output string.result → "Hello Everyone"

💬 Support

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dataLib v6.0.0 | MC Java 26.2 | Pure Datapack