Installation

Requirements

• Scala 3.3+
• sbt 1.9+

Adding Dependencies

Add uni to your build.sbt:

// Core utilities (object wiring, logging, JSON, HTTP, Rx, etc.)
libraryDependencies += "org.wvlet.uni" %% "uni" % "2026.1.6"

Cross-Platform Projects

For Scala.js or Scala Native projects:

// Scala.js
libraryDependencies += "org.wvlet.uni" %%% "uni" % "2026.1.6"

// Scala Native
libraryDependencies += "org.wvlet.uni" %%% "uni" % "2026.1.6"

Imports

Common imports for getting started:

// Object wiring
import wvlet.uni.design.Design

// Logging
import wvlet.uni.log.{LogSupport, Logger, LogLevel}

// JSON
import wvlet.uni.json.JSON

// HTTP
import wvlet.uni.http.{Http, HttpRequest, HttpResponse}

// Reactive streams
import wvlet.uni.rx.Rx

// Control flow
import wvlet.uni.control.{Retry, CircuitBreaker, Resource}

Verifying Installation

Create a simple test to verify the installation:

import wvlet.uni.log.LogSupport

object Main extends App with LogSupport:
  info("uni is working!")

Run with:

sbt run

You should see log output with your message.

IDE Support

uni works with all major Scala IDEs:

• IntelliJ IDEA with Scala plugin
• VS Code with Metals
• Neovim with Metals

The library uses standard Scala 3 features, so IDE support is seamless.