Configuration

Complete reference for YggUtils.yml — every field, type, default, and validation rule.

YggUtils is configured through a single YAML file — YggUtils.yml — located in the same directory you run the JAR from.

Generating the Config

If YggUtils.yml does not exist when YggUtils starts, it is created automatically and YggUtils exits immediately with code 0:

authserver: ''
serverfile: ''

Fill in both fields and run YggUtils again.

Fields

`authserver`

Property	Value
Type	`string`
Required	Yes
Default	(empty)

The root URL of your Yggdrasil-compatible authentication server. This is passed directly to authlib-injector as the agent argument.

authserver: https://auth.example.com

Warning

Provide only the root URL. Do not include a trailing path — authlib-injector appends the necessary API paths itself.

`serverfile`

Property	Value
Type	`string`
Required	Yes
Default	(empty)

The filename of the Minecraft server JAR to launch, relative to the working directory.

serverfile: server.jar

YggUtils verifies this file exists on disk before starting. If it does not exist, YggUtils exits with code 1.

Full Example

authserver: https://auth.example.com
serverfile: fabric-server-launch.jar

Validation Rules

Condition	Behaviour	Exit Code
File does not exist	Config generated, prompts to fill it in	`0`
`authserver` is empty	Warning printed, server not started	`0`
`serverfile` is empty	Warning printed, server not started	`0`
`serverfile` file not found on disk	Error printed	`1`

Reconfiguring

Edit YggUtils.yml directly and restart YggUtils to apply changes. To reset to a blank config, delete the file and run YggUtils once to regenerate it.