Vital Signals
by berry_
Vital Signals is a Fabric library that gives other mods detailed event information about player status, such as health, hunger and oxygen changes.
What it does
The library is built for mod developers. It exposes a simple event registration system that lets other mods react when a player's health, hunger saturation or underwater oxygen changes, and it captures the stages of the damage calculation as they run. Each damage event records the sources of damage reduction, including armor, shields and magic, so a dependent mod can see why a hit landed as it did.
Vital Signals uses Fabric API for its low-level event hooks and network synchronization, and it sends damage event data over the network in NBT format. The server syncs the data to clients automatically, so client-side code receives the same information without extra setup. It covers death events with complete information about the player's final state, along with hunger and oxygen events, and it ships with an event infrastructure for damage. Fabric Language Kotlin is required as well, and the library is published for Fabric only, on 1.21.11 with version 0.1.2 as the latest alpha file. The code is under the MIT License and is open source.
Key features
Detailed damage capture
Records each stage of the damage calculation and the reduction contributed by armor, shields and magic.
Simple event registration
Mods register listeners for player status events through a compact API designed for developers.
Automatic network synchronization
The server sends player status data to clients, so events stay consistent on both sides of a connection.
Death, hunger and oxygen events
Separate events report death with full player information, hunger saturation changes and underwater oxygen changes.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Status-aware gameplay mods
A mod that reacts to low hunger or dropping oxygen can subscribe to these events instead of polling player data.
Damage analysis tools
Mods that log or display damage breakdowns can use the recorded reduction sources for each hit.
Who it’s for: Developers of Fabric mods who need to react to changes in player health, hunger or oxygen. Server owners only need the library if a mod they run depends on it.
Questions
Does Vital Signals need Fabric API?
Does Vital Signals need Fabric Language Kotlin?
Is Vital Signals a server mod?
Which Minecraft version does Vital Signals support?
In the catalog
Vital Signals is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
A library that provides detailed player status information and an event system for Minecraft mods. This library offers a Mod-friendly API, enabling other mods to receive and process events regarding important player status changes such as health, hunger, oxygen levels, and more. Vital Signals is an event library…
Official listing
- Modrinth page
- modrinth.com/mod/vital-signals
- Owner
- berry_
- Published
- 2026-01-29
- Updated on Modrinth
- 2026-02-11
- Facts verified
- 2026-10-15