diff --git a/main-command/src/main/scala/sbt/BasicCommandStrings.scala b/main-command/src/main/scala/sbt/BasicCommandStrings.scala
index c3939a958..386208441 100644
--- a/main-command/src/main/scala/sbt/BasicCommandStrings.scala
+++ b/main-command/src/main/scala/sbt/BasicCommandStrings.scala
@@ -252,7 +252,10 @@ $AliasCommand name=
   def continuousBriefHelp: (String, String) =
     (ContinuousExecutePrefix + " <command>", continuousDetail)
   def ClearCaches: String = "clearCaches"
-  def ClearCachesDetailed: String = "Clears all of sbt's internal caches."
+  def ClearCachesDetailed: String = "Clears sbt's internal caches."
+
+  val CleanFull: String = "cleanFull"
+  def cleanFullDetailed: String = "Clears sbt's local caches."
 
   private[sbt] val networkExecPrefix = "__"
   private[sbt] val DisconnectNetworkChannel = s"${networkExecPrefix}disconnectNetworkChannel"
diff --git a/main/src/main/scala/sbt/Main.scala b/main/src/main/scala/sbt/Main.scala
index 6093b5578..a32f661b7 100644
--- a/main/src/main/scala/sbt/Main.scala
+++ b/main/src/main/scala/sbt/Main.scala
@@ -28,13 +28,12 @@ import sbt.internal.nio.{ CheckBuildSources, FileTreeRepository }
 import sbt.internal.server.{ BuildServerProtocol, NetworkChannel }
 import sbt.internal.util.Terminal.hasConsole
 import sbt.internal.util.Types.{ const, idFun }
-import sbt.internal.util.complete.{ Parser, SizeParser }
+import sbt.internal.util.complete.Parser
 import sbt.internal.util.{ Terminal as ITerminal, * }
 import sbt.io.*
 import sbt.io.syntax.*
 import sbt.util.{ Level, Logger, Show }
 import xsbti.AppProvider
-import xsbti.compile.CompilerCache
 
 import scala.annotation.{ nowarn, tailrec }
 import scala.concurrent.ExecutionContext
@@ -352,6 +351,7 @@ object BuiltinCommands {
       act,
       continuous,
       clearCaches,
+      Clean.cleanFull,
       NetworkChannel.disconnect,
       waitCmd,
       promptChannel,
@@ -970,7 +970,7 @@ object BuiltinCommands {
       session,
       structure,
       s2,
-      st => setupGlobalFileTreeRepository(addCacheStoreFactoryFactory(st))
+      st => setupGlobalFileTreeRepository(Clean.addCacheStoreFactoryFactory(st))
     )
     val s4 = s3.put(Keys.useLog4J.key, Project.extract(s3).get(Keys.useLog4J))
     addSuperShellParams(CheckBuildSources.init(LintUnused.lintUnusedFunc(s4)))
@@ -992,27 +992,9 @@ object BuiltinCommands {
       .put(Keys.superShellThreshold.key, threshold)
       .put(Keys.superShellMaxTasks.key, maxItems)
   }
-  private val addCacheStoreFactoryFactory: State => State = (s: State) => {
-    val size = Project
-      .extract(s)
-      .getOpt(Keys.fileCacheSize)
-      .flatMap(SizeParser(_))
-      .getOrElse(SysProp.fileCacheSize)
-    s.get(Keys.cacheStoreFactoryFactory).foreach(_.close())
-    s.put(Keys.cacheStoreFactoryFactory, InMemoryCacheStore.factory(size))
-  }
 
-  def registerCompilerCache(s: State): State = {
-    s.get(Keys.stateCompilerCache).foreach(_.clear())
-    s.put(Keys.stateCompilerCache, CompilerCache.fresh)
-  }
-
-  def clearCaches: Command = {
-    val help = Help.more(ClearCaches, ClearCachesDetailed)
-    val f: State => State =
-      registerCompilerCache andThen (_.initializeClassLoaderCache) andThen addCacheStoreFactoryFactory
-    Command.command(ClearCaches, help)(f)
-  }
+  def registerCompilerCache(s: State): State = Clean.registerCompilerCache(s)
+  def clearCaches: Command = Clean.clearCaches
 
   private[sbt] def waitCmd: Command =
     Command.arb(_ =>
diff --git a/main/src/main/scala/sbt/internal/Clean.scala b/main/src/main/scala/sbt/internal/Clean.scala
index b74d5d988..9d0094ce3 100644
--- a/main/src/main/scala/sbt/internal/Clean.scala
+++ b/main/src/main/scala/sbt/internal/Clean.scala
@@ -12,19 +12,23 @@ package internal
 import java.io.IOException
 import java.nio.file.{ DirectoryNotEmptyException, Files, Path }
 
+import sbt.BasicCommandStrings.*
 import sbt.Def.*
 import sbt.Keys.*
 // import sbt.Project.richInitializeTask
 import sbt.ProjectExtra.*
 import sbt.ScopeAxis.Zero
 import sbt.io.syntax.*
+import sbt.io.IO
 import sbt.nio.Keys.*
 import sbt.nio.file.*
 import sbt.nio.file.syntax.pathToPathOps
 import sbt.nio.file.Glob.{ GlobOps }
-import sbt.util.Level
+import sbt.util.{ DiskActionCacheStore, Level }
+import sbt.internal.util.complete.SizeParser
 import sjsonnew.JsonFormat
 import xsbti.{ PathBasedFile, VirtualFileRef }
+import xsbti.compile.CompilerCache
 
 private[sbt] object Clean {
 
@@ -187,4 +191,41 @@ private[sbt] object Clean {
         debug(s"Caught unexpected exception $e deleting $path")
     }
   }
+
+  val registerCompilerCache: State => State = (s: State) =>
+    s.get(Keys.stateCompilerCache).foreach(_.clear())
+    s.put(Keys.stateCompilerCache, CompilerCache.fresh)
+
+  val addCacheStoreFactoryFactory: State => State = (s: State) =>
+    val size = Project
+      .extract(s)
+      .getOpt(Keys.fileCacheSize)
+      .flatMap(SizeParser(_))
+      .getOrElse(SysProp.fileCacheSize)
+    s.get(Keys.cacheStoreFactoryFactory).foreach(_.close())
+    s.put(Keys.cacheStoreFactoryFactory, InMemoryCacheStore.factory(size))
+
+  private val clearCachesFun: State => State =
+    registerCompilerCache
+      .andThen(_.initializeClassLoaderCache)
+      .andThen(addCacheStoreFactoryFactory)
+
+  def clearCaches: Command =
+    val help = Help.more(ClearCaches, ClearCachesDetailed)
+    Command.command(ClearCaches, help)(clearCachesFun)
+
+  def cleanFull: Command =
+    val h = Help.more(CleanFull, cleanFullDetailed)
+    val expunge: State => State =
+      (s: State) =>
+        val outputDirectory = s
+          .get(BasicKeys.rootOutputDirectory)
+          .getOrElse(sys.error("outputDirectory has not been set"))
+        val cacheStore = s.get(BasicKeys.cacheStores).getOrElse(Nil)
+        cacheStore.foreach:
+          case d: DiskActionCacheStore => d.clear()
+          case _                       => ()
+        IO.delete(outputDirectory.toFile())
+        s
+    Command.command(CleanFull, h)(expunge andThen clearCachesFun)
 }
diff --git a/util-cache/src/main/scala/sbt/util/ActionCacheStore.scala b/util-cache/src/main/scala/sbt/util/ActionCacheStore.scala
index 7fb6e479f..8d23dbeae 100644
--- a/util-cache/src/main/scala/sbt/util/ActionCacheStore.scala
+++ b/util-cache/src/main/scala/sbt/util/ActionCacheStore.scala
@@ -192,6 +192,10 @@ class DiskActionCacheStore(base: Path, converter: FileConverter) extends Abstrac
   private val symlinkSupported: AtomicBoolean = AtomicBoolean(true)
 
   override def storeName: String = "disk"
+
+  def clear(): Unit =
+    if Files.exists(base) then IO.delete(base.toFile())
+    else ()
   override def get(request: GetActionResultRequest): Either[Throwable, ActionResult] =
     val acFile = acBase.toFile / request.actionDigest.toString.replace("/", "-")
     if acFile.exists then