.

.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
   "features": {
     "ghcr.io/devcontainers/features/docker-in-docker:1": {},
     "ghcr.io/devcontainers/features/dotnet": {
-      "version": "6.0.427"
+      "version": "6.0.425"
     },
     "ghcr.io/devcontainers/features/node:1": {
       "version": "16"

src/Runner.Worker/Handlers/HandlerFactory.cs

@@ -96,6 +96,18 @@ namespace GitHub.Runner.Worker.Handlers
                     var isLocalOptOut = StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable(Constants.Variables.Actions.AllowActionsUseUnsecureNodeVersion));
                     bool isOptOut = isWorkflowOptOutSet ? StringUtil.ConvertToBoolean(workflowOptOut) : isLocalOptOut;
 
+                    if (isOptOut && (executionContext.Global.Variables.GetBoolean("DistributedTask.NotAllowOptOutForNode20") ?? false))
+                    {
+                        executionContext.Global.JobTelemetry.Add(new JobTelemetry()
+                        {
+                            Type = JobTelemetryType.General,
+                            Message = $"Not allowing opt out for node20 in step {executionContext.Id}"
+                        });
+                        Trace.Info("Not allowing opt out for node20");
+                        executionContext.Warning("End of life for Actions Node16. For more info: https://github.blog/changelog/2024-09-25-end-of-life-for-actions-node16/");
+                        isOptOut = false;
+                    }
+
                     if (!isOptOut)
                     {
                         var repoAction = action as Pipelines.RepositoryPathReference;

src/dev.sh

@@ -17,7 +17,7 @@ LAYOUT_DIR="$SCRIPT_DIR/../_layout"
 DOWNLOAD_DIR="$SCRIPT_DIR/../_downloads/netcore2x"
 PACKAGE_DIR="$SCRIPT_DIR/../_package"
 DOTNETSDK_ROOT="$SCRIPT_DIR/../_dotnetsdk"
-DOTNETSDK_VERSION="6.0.427"
+DOTNETSDK_VERSION="6.0.425"
 DOTNETSDK_INSTALLDIR="$DOTNETSDK_ROOT/$DOTNETSDK_VERSION"
 DOTNET8SDK_VERSION="8.0.303"
 DOTNET8SDK_INSTALLDIR="$DOTNETSDK_ROOT/$DOTNET8SDK_VERSION"

src/global.json

@@ -1,5 +1,5 @@
 {
   "sdk": {
-    "version": "6.0.427"
+    "version": "6.0.425"
   }
 }