diff --git a/build/yaml/botbuilder-js-ci.yml b/build/yaml/botbuilder-js-ci.yml
new file mode 100644
index 0000000000..78195c178e
--- /dev/null
+++ b/build/yaml/botbuilder-js-ci.yml
@@ -0,0 +1,50 @@
+#
+# This runs under botbuilder-js-ci.yml. Runs unit tests on Node versions 10 and 12.
+#
+
+# "name" here defines the build number format. Build number is accessed via $(Build.BuildNumber)
+name: $(Build.BuildId)
+
+pool:
+  vmImage: 'macOS-10.15'
+
+variables:
+  PackageVersion: 4.8.0-preview.$(Build.BuildNumber)
+  PreviewPackageVersion: 4.8.0-preview.$(Build.BuildNumber)
+
+stages:
+- stage: Node10CI
+  dependsOn: [] # Run this stage in parallel
+  displayName: 'Node 10.x CI'
+  variables:
+    NodeVersion: 10.x
+  jobs:
+  - job: Node10UnitTests
+    displayName: 'Node 10.x Unit Tests'
+    steps:
+    - template: js-build-steps.yml
+
+    - powershell: |
+        pushd ..
+        Get-ChildItem -Recurse -Force | Where {$_.FullName -notlike "*node_modules*"}
+      displayName: 'Dir workspace except node-modules (takes 5 seconds)'
+      continueOnError: true
+      condition: succeededOrFailed()
+
+- stage: Node12CI
+  dependsOn: [] # Run this stage in parallel
+  displayName: 'Node 12.x CI'
+  variables:
+    NodeVersion: 12.x
+  jobs:
+  - job: Node12UnitTests
+    displayName: 'Node 12.x Unit Tests'
+    steps:
+    - template: js-build-steps.yml
+
+    - powershell: |
+        pushd ..
+        Get-ChildItem -Recurse -Force | Where {$_.FullName -notlike "*node_modules*"}
+      displayName: 'Dir workspace except node-modules (takes 5 seconds)'
+      continueOnError: true
+      condition: succeededOrFailed()
\ No newline at end of file
diff --git a/build/yaml/botbuilder-js-daily.yml b/build/yaml/botbuilder-js-daily.yml
new file mode 100644
index 0000000000..b7138fabb5
--- /dev/null
+++ b/build/yaml/botbuilder-js-daily.yml
@@ -0,0 +1,111 @@
+# This runs under BotBuilder-JS-daily-yaml.
+
+# "name" here defines the build number format. Build number is accessed via $(Build.BuildNumber)
+name: $(Build.BuildId)
+
+pool:
+  vmImage: 'macOS-10.15'
+
+variables:
+  NodeVersion: 12.x
+#  PackageVersion: Define this in Azure to be settable at queue time. Ex: 4.8.0-dev.{DateStamp}.{CommitHash} 
+#  PreviewPackageVersion: Define this in Azure to be settable at queue time. Ex: 4.8.0-dev.{DateStamp}.{CommitHash}
+
+steps:
+- powershell: |
+   # Replace {DateStamp} and {CommitHash} tokens with the actual values in vars PackageVersion and PreviewPackageVersion
+   $dateStamp = (Get-Date -format "yyyyMMdd");
+   $commitHash = "$(Build.SourceVersion)".SubString(0,7);
+   
+   "Raw PackageVersion = $(PackageVersion)";
+   $v = "$(PackageVersion)".Replace("{DateStamp}",$dateStamp).Replace("{CommitHash}",$commitHash);
+   Write-Host "##vso[task.setvariable variable=PackageVersion;]$v";
+   "Resolved PackageVersion = $v";
+   
+   "Raw PreviewPackageVersion = $(PreviewPackageVersion)";
+   $ppv = "$(PreviewPackageVersion)".Replace("{DateStamp}",$dateStamp).Replace("{CommitHash}",$commitHash);
+   Write-Host "##vso[task.setvariable variable=PreviewPackageVersion;]$ppv";
+   "Resolved PreviewPackageVersion = $ppv";
+  displayName: 'Resolve package version variables'
+
+- template: js-daily-build-steps.yml
+
+- script: 'lerna exec --no-private npm pack'
+  displayName: 'lerna exec --no-private npm pack'
+
+- task: CopyFiles@2
+  displayName: 'Copy TGZ files to staging'
+  inputs:
+    SourceFolder: libraries
+    Contents: '*/*.tgz'
+    TargetFolder: '$(Build.ArtifactStagingDirectory)'
+    flattenFolders: true
+
+- task: PublishBuildArtifacts@1
+  displayName: 'Publish staging to Build Artifacts'
+
+- powershell: |
+   [string[]]$outvar = (Get-ChildItem *.tgz -Path $(Build.ArtifactStagingDirectory) ).Name;
+   
+   [int] $packageCount = $outvar.Length;
+   $PackagesDescription = "$packageCount packages";
+   $PackagesDescription;
+   $outvar;
+   
+   "##vso[task.setvariable variable=PackagesDescription;]$PackagesDescription";
+   [int] $maxTags = 5;
+   
+   if ($packageCount -gt $maxTags) {
+       # Too many packages for tags.
+   
+       # Set a few package name variables for tags
+       for ($i = 0; $i -lt $maxTags; $i++ ) {
+           $p = $outvar[$i];
+           "##vso[task.setvariable variable=pkg$i;]$p";
+       }
+   
+       $message = "(See 'Package names' task log for full list)";
+       Write-Host "##vso[task.setvariable variable=pkg$i;]$message";
+       Write-Host $message;
+       $packageCount = ++$i;
+   } else {
+       # Set package name variables for tags
+       for ($i = 0; $i -lt $packageCount; $i++ ) {
+           $p = $outvar[$i];
+           "##vso[task.setvariable variable=pkg$i;]$p";
+       }
+   }
+   
+   for ($i = $packageCount; $i -le 30; $i++ ) {
+       # Set remaining variables to an empty string
+       "##vso[task.setvariable variable=pkg$i;]";
+   }
+  displayName: 'Package names'
+  continueOnError: true
+
+- task: colinsalmcorner.colinsalmcorner-buildtasks.tag-build-task.tagBuildOrRelease@0
+  displayName: 'Tag Build with package names'
+  inputs:
+    tags: |
+     $(PACKAGESDESCRIPTION)
+     $(PKG0)
+     $(PKG1)
+     $(PKG2)
+     $(PKG3)
+     $(PKG4)
+     $(PKG5)
+     $(PKG6)
+     $(PKG7)
+     $(PKG8)
+     $(PKG9)
+     $(PKG10)
+     $(PKG11)
+     $(PKG12)
+  continueOnError: true
+
+- powershell: |
+   pushd ..
+   ls -R
+  displayName: 'Dir workspace'
+  continueOnError: true
+  condition: succeededOrFailed()
\ No newline at end of file
diff --git a/build/yaml/js-build-steps.yml b/build/yaml/js-build-steps.yml
new file mode 100644
index 0000000000..8f45e6352f
--- /dev/null
+++ b/build/yaml/js-build-steps.yml
@@ -0,0 +1,85 @@
+#variables:
+#  PackageVersion: Define this in the calling pipeline.
+
+steps:
+- task: colinsalmcorner.colinsalmcorner-buildtasks.tag-build-task.tagBuildOrRelease@0
+  displayName: 'Tag Build with version number. (Skip if a fork PR to avoid access denied error.)'
+  inputs:
+    tags: |
+     v: $(PackageVersion)
+     preview v: $(PreviewPackageVersion)
+  continueOnError: true
+  condition: and(succeeded(), eq(variables['System.PullRequest.IsFork'], 'false'))
+
+- task: NodeTool@0
+  displayName: 'Use Node $(NodeVersion)'
+  inputs:
+    versionSpec: $(NodeVersion)
+
+- task: Npm@1
+  displayName: 'npm install lerna ...'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'install --global lerna@3.22.1 nyc mocha eslint-plugin-jsdoc'
+
+- task: Npm@1
+  displayName: '/tools npm install'
+  inputs:
+    workingDir: tools
+    verbose: false
+
+- bash: |
+   set -o xtrace
+   sed -i '' 's/${Version}/$(PackageVersion)/g' package.json 
+   sed -i '' 's/${Version}/$(PreviewPackageVersion)/g' libraries/adaptive-expressions/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-ai/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-applicationinsights/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-azure/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-core/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-dialogs/package.json
+   sed -i '' 's/${Version}/$(PreviewPackageVersion)/g' libraries/botbuilder-lg/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-testing/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-config/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-connector/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-schema/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-streaming/package.json
+  displayName: 'Replace version number in package.json files'
+  continueOnError: true
+
+- bash: |
+   npm run update-versions
+  displayName: 'npm run update-versions'
+  env:
+    Version: $(PackageVersion)
+    PreviewPackageVersion: $(PreviewPackageVersion)
+
+- powershell: |
+   $fileName = 'package-lock.json'
+   Get-ChildItem -Path ./tools -File | Where-Object {$_.Name -eq $fileName};
+   Write-Host "`nDeleting any files listed above";
+   Get-ChildItem -Path ./tools -File | Where-Object {$_.Name -eq $fileName} | Remove-Item -Force;
+  displayName: 'Delete tools/package-lock.json. Maybe avoids intermittent error in \"npm run postinstall\" ENOENT: no such file or directory, lchown ''/Users/runner/.npm/_locks/staging-7c222bec8116519f.lock'''
+  continueOnError: true
+
+- task: Npm@1
+  displayName: 'npm run postinstall'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'run postinstall'
+
+- task: Npm@1
+  displayName: 'npm run build'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'run build'
+
+- task: Npm@1
+  displayName: 'npm run test'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'run test'
\ No newline at end of file
diff --git a/build/yaml/js-daily-build-steps.yml b/build/yaml/js-daily-build-steps.yml
new file mode 100644
index 0000000000..6f06e3ea83
--- /dev/null
+++ b/build/yaml/js-daily-build-steps.yml
@@ -0,0 +1,86 @@
+#variables:
+#  PackageVersion: Define this in the calling pipeline.
+#  PreviewPackageVersion: Define this in Azure to be settable at queue time. Ex: 4.9.0-dev.{DateStamp}.{CommitHash}
+
+steps:
+- task: colinsalmcorner.colinsalmcorner-buildtasks.tag-build-task.tagBuildOrRelease@0
+  displayName: 'Tag Build with version number. (Skip if a fork PR to avoid access denied error.)'
+  inputs:
+    tags: |
+     v: $(PackageVersion)
+     preview v: $(PreviewPackageVersion)
+  continueOnError: true
+  condition: and(succeeded(), eq(variables['System.PullRequest.IsFork'], 'false'))
+
+- task: NodeTool@0
+  displayName: 'Use Node $(NodeVersion)'
+  inputs:
+    versionSpec: $(NodeVersion)
+
+- task: Npm@1
+  displayName: 'npm install lerna ...'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'install --global lerna@3.22.1 nyc mocha eslint-plugin-jsdoc'
+
+- task: Npm@1
+  displayName: '/tools npm install'
+  inputs:
+    workingDir: tools
+    verbose: false
+
+- bash: |
+   set -o xtrace
+   sed -i '' 's/${Version}/$(PackageVersion)/g' package.json 
+   sed -i '' 's/${Version}/$(PreviewPackageVersion)/g' libraries/adaptive-expressions/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-ai/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-applicationinsights/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-azure/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-core/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-dialogs/package.json
+   sed -i '' 's/${Version}/$(PreviewPackageVersion)/g' libraries/botbuilder-lg/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botbuilder-testing/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-config/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-connector/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-schema/package.json
+   sed -i '' 's/${Version}/$(PackageVersion)/g' libraries/botframework-streaming/package.json
+  displayName: 'Replace version number in package.json files'
+  continueOnError: true
+
+- bash: |
+   npm run update-versions
+  displayName: 'npm run update-versions'
+  env:
+    Version: $(PackageVersion)
+    PreviewPackageVersion: $(PreviewPackageVersion)
+
+- powershell: |
+   $fileName = 'package-lock.json'
+   Get-ChildItem -Path ./tools -File | Where-Object {$_.Name -eq $fileName};
+   Write-Host "`nDeleting any files listed above";
+   Get-ChildItem -Path ./tools -File | Where-Object {$_.Name -eq $fileName} | Remove-Item -Force;
+  displayName: 'Delete tools/package-lock.json. Maybe avoids intermittent error in \"npm run postinstall\" ENOENT: no such file or directory, lchown ''/Users/runner/.npm/_locks/staging-7c222bec8116519f.lock'''
+  continueOnError: true
+
+- task: Npm@1
+  displayName: 'npm run postinstall'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'run postinstall'
+
+- task: Npm@1
+  displayName: 'npm run build'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'run build'
+
+- task: Npm@1
+  displayName: 'npm run test'
+  inputs:
+    command: custom
+    verbose: false
+    customCommand: 'run test'
\ No newline at end of file
diff --git a/libraries/botframework-connector/src/auth/jwtTokenValidation.ts b/libraries/botframework-connector/src/auth/jwtTokenValidation.ts
index 7957929409..fed19cd74e 100644
--- a/libraries/botframework-connector/src/auth/jwtTokenValidation.ts
+++ b/libraries/botframework-connector/src/auth/jwtTokenValidation.ts
@@ -133,7 +133,7 @@ export namespace JwtTokenValidation {
             await authConfig.validateClaims(claims);
         } else if (SkillValidation.isSkillClaim(claims)) {
             // Skill claims must be validated using AuthenticationConfiguration validateClaims
-            throw new AuthenticationError('Unauthorized Access. Request is not authorized. Skill Claims require validation.', StatusCodes.UNAUTHORIZED); 
+            throw new Error('Unauthorized Access. Request is not authorized. Skill Claims require validation.'); 
         }
     }
 
diff --git a/libraries/botframework-streaming/src/interfaces/INodeSocket.ts b/libraries/botframework-streaming/src/interfaces/INodeSocket.ts
index 3e5faeb12e..a92853c8f0 100644
--- a/libraries/botframework-streaming/src/interfaces/INodeSocket.ts
+++ b/libraries/botframework-streaming/src/interfaces/INodeSocket.ts
@@ -28,6 +28,7 @@ export interface INodeSocket {
     readonly writableLength: number;
     readonly readableHighWaterMark: number;
     readonly readableLength: number;
+    readonly readableFlowing: boolean | null;
 
     address(): AddressInfo | string;