Add ce3 module and iolocal instances

build.sbt

@@ -77,6 +77,16 @@ lazy val noop = crossProject(JSPlatform, JVMPlatform)
     name := "log4cats-noop"
   )
 
+lazy val ce3 = crossProject(JSPlatform, JVMPlatform)
+  .settings(commonSettings)
+  .dependsOn(core)
+  .settings(
+    name := "log4cats-ce3",
+    libraryDependencies ++= Seq(
+      "org.typelevel" %%% "cats-effect" % catsEffectV
+    )
+  )
+
 lazy val slf4j = project
   .settings(commonSettings)
   .dependsOn(core.jvm)

ce3/shared/src/main/scala/org/typelevel/log4cats/ce3/IOLocalHelpers.scala

@@ -0,0 +1,16 @@
+package org.typelevel.log4cats.ce3
+
+import cats.effect.{IO, IOLocal}
+import org.typelevel.log4cats.{LoggerFactory, SelfAwareStructuredLogger}
+
+object IOLocalHelpers {
+  def loggerWithContextFromIOLocal(
+      sl: SelfAwareStructuredLogger[IO],
+      local: IOLocal[Map[String, String]]
+  ): SelfAwareStructuredLogger[IO] = SelfAwareStructuredLogger.withContextF(sl)(local.get)
+
+  def factoryWithContextFromKleisli(
+      lf: LoggerFactory[IO],
+      local: IOLocal[Map[String, String]]
+  ): LoggerFactory[IO] = LoggerFactory.withContextF(lf)(local.get)
+}