Singleplayer Library

SinglePlayer Library is a lightweight utility library for datapacks and mods that helps developers support singleplayer environments without creating separate versions of their projects.
It provides a simple way to detect and enable singleplayer-specific features or settings, allowing projects that normally require manual setup or commands to work smoothly for singleplayer users.

• Ultra Lightweight : Minimal overhead designed for maximum performance.
• Easy Integration : Add singleplayer support to datapacks and mods without complex setup.
• Blazing Fast : Optimized to run efficiently with minimal impact.
• Developer Friendly : Built as a reusable foundation for other projects.
• Singleplayer Ready : Provides singleplayer support without requiring manual permission setup.
• Multi Version Support : Supports multiple Minecraft versions while keeping the same simple integration.

SinglePlayer Library uses tags to provide a simple way for projects to detect and handle singleplayer environments.
The library checks players at a 1-second interval to keep performance impact as low as possible. Unlike normal Minecraft tick functions that run 20 times per second, SinglePlayer Library only performs its check once per second, providing a lightweight and stable system.

• splib_active Indicates that the player has been detected by SinglePlayer Library and is running in a supported singleplayer environment. Projects can use this tag to enable singleplayer-specific features or settings.

• splib_ignore This tag is intended for developers and server owners. Players with this tag will be excluded from SinglePlayer Library handling, preventing splib_active from being automatically added.

Use splib_active to run features or settings that should only apply in singleplayer worlds.
Keep in mind that the code below does not run until the function is executed. The namespace my_pack is not automatically created by a datapack or mod you must implement and structure it yourself.

check.mcfunction

execute unless entity @s[tag=splib_active] run function my_pack:tellraw_missing_library
execute if entity @s[tag=splib_active] run function my_pack:singleplayer_settings

use_feature.mcfunction

execute if entity @s[tag=splib_active] run function my_pack:feature/run
execute unless entity @s[tag=splib_active] run function my_pack:feature/blocked

other.mcfunction

execute unless entity @s[tag=splib_active] run function my_pack:performance/low_mode

Datapack (Singleplayer / Server)

1. Download the datapack.
2. Place it in your world’s datapacks folder.
3. Exit and rejoin the world. Search on youtube how to install datapack ↗
4. Tip: Use /datapack list and tag <targets> list to verify that it is installed correctly.

Mod Version (Client / Server)

1. Install the mod file into your mods folder.
2. Launch the game or server with a compatible mod loader.
3. No additional setup required. Search on youtube how to install mod ↗
4. Tip: It will appear in the mod menu if installed correctly.