diff --git a/eng/Version.Details.props b/eng/Version.Details.props
index 26f55640d96..5980727663e 100644
--- a/eng/Version.Details.props
+++ b/eng/Version.Details.props
@@ -27,7 +27,7 @@ This file should be imported by eng/Versions.props
     <MicrosoftCodeAnalysisFeaturesPackageVersion>5.0.0-2.25480.7</MicrosoftCodeAnalysisFeaturesPackageVersion>
     <MicrosoftVisualStudioLanguageServicesPackageVersion>5.0.0-2.25480.7</MicrosoftVisualStudioLanguageServicesPackageVersion>
     <!-- dotnet/arcade dependencies -->
-    <MicrosoftDotNetArcadeSdkPackageVersion>10.0.0-beta.26110.1</MicrosoftDotNetArcadeSdkPackageVersion>
+    <MicrosoftDotNetArcadeSdkPackageVersion>11.0.0-beta.26113.2</MicrosoftDotNetArcadeSdkPackageVersion>
     <!-- _git/dotnet-optimization dependencies -->
     <optimizationlinuxarm64MIBCRuntimePackageVersion>1.0.0-prerelease.26110.1</optimizationlinuxarm64MIBCRuntimePackageVersion>
     <optimizationlinuxx64MIBCRuntimePackageVersion>1.0.0-prerelease.26110.1</optimizationlinuxx64MIBCRuntimePackageVersion>
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index d7a4a9b49ae..2abbd03e888 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -76,9 +76,9 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.26110.1">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="11.0.0-beta.26113.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4bf37ce670528cf2aef4d9b1cd892554b1b02d9d</Sha>
+      <Sha>96ff8183603cb80dd7ee87b926a11382b643d81f</Sha>
     </Dependency>
     <Dependency Name="optimization.windows_nt-x64.MIBC.Runtime" Version="1.0.0-prerelease.26110.1">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-optimization</Uri>
diff --git a/eng/common/SetupNugetSources.ps1 b/eng/common/SetupNugetSources.ps1
index 65ed3a8adef..fc8d618014e 100644
--- a/eng/common/SetupNugetSources.ps1
+++ b/eng/common/SetupNugetSources.ps1
@@ -1,7 +1,6 @@
 # This script adds internal feeds required to build commits that depend on internal package sources. For instance,
-# dotnet6-internal would be added automatically if dotnet6 was found in the nuget.config file. Similarly,
-# dotnet-eng-internal and dotnet-tools-internal are added if dotnet-eng and dotnet-tools are present.
-# In addition, this script also enables disabled internal Maestro (darc-int*) feeds.
+# dotnet6-internal would be added automatically if dotnet6 was found in the nuget.config file. In addition also enables
+# disabled internal Maestro (darc-int*) feeds.
 #
 # Optionally, this script also adds a credential entry for each of the internal feeds if supplied.
 #
@@ -174,16 +173,4 @@ foreach ($dotnetVersion in $dotnetVersions) {
     }
 }
 
-# Check for dotnet-eng and add dotnet-eng-internal if present
-$dotnetEngSource = $sources.SelectSingleNode("add[@key='dotnet-eng']")
-if ($dotnetEngSource -ne $null) {
-    AddOrEnablePackageSource -Sources $sources -DisabledPackageSources $disabledSources -SourceName "dotnet-eng-internal" -SourceEndPoint "https://pkgs.dev.azure.com/dnceng/internal/_packaging/dotnet-eng-internal/nuget/$feedSuffix" -Creds $creds -Username $userName -pwd $Password
-}
-
-# Check for dotnet-tools and add dotnet-tools-internal if present
-$dotnetToolsSource = $sources.SelectSingleNode("add[@key='dotnet-tools']")
-if ($dotnetToolsSource -ne $null) {
-    AddOrEnablePackageSource -Sources $sources -DisabledPackageSources $disabledSources -SourceName "dotnet-tools-internal" -SourceEndPoint "https://pkgs.dev.azure.com/dnceng/internal/_packaging/dotnet-tools-internal/nuget/$feedSuffix" -Creds $creds -Username $userName -pwd $Password
-}
-
 $doc.Save($filename)
diff --git a/eng/common/SetupNugetSources.sh b/eng/common/SetupNugetSources.sh
index b2163abbe71..b97cc536379 100755
--- a/eng/common/SetupNugetSources.sh
+++ b/eng/common/SetupNugetSources.sh
@@ -1,9 +1,8 @@
 #!/usr/bin/env bash
 
 # This script adds internal feeds required to build commits that depend on internal package sources. For instance,
-# dotnet6-internal would be added automatically if dotnet6 was found in the nuget.config file. Similarly,
-# dotnet-eng-internal and dotnet-tools-internal are added if dotnet-eng and dotnet-tools are present.
-# In addition, this script also enables disabled internal Maestro (darc-int*) feeds.
+# dotnet6-internal would be added automatically if dotnet6 was found in the nuget.config file. In addition also enables
+# disabled internal Maestro (darc-int*) feeds.
 # 
 # Optionally, this script also adds a credential entry for each of the internal feeds if supplied.
 #
@@ -174,18 +173,6 @@ for DotNetVersion in ${DotNetVersions[@]} ; do
     fi
 done
 
-# Check for dotnet-eng and add dotnet-eng-internal if present
-grep -i "<add key=\"dotnet-eng\"" $ConfigFile > /dev/null
-if [ "$?" == "0" ]; then
-    AddOrEnablePackageSource "dotnet-eng-internal" "https://pkgs.dev.azure.com/dnceng/internal/_packaging/dotnet-eng-internal/nuget/$FeedSuffix"
-fi
-
-# Check for dotnet-tools and add dotnet-tools-internal if present
-grep -i "<add key=\"dotnet-tools\"" $ConfigFile > /dev/null
-if [ "$?" == "0" ]; then
-    AddOrEnablePackageSource "dotnet-tools-internal" "https://pkgs.dev.azure.com/dnceng/internal/_packaging/dotnet-tools-internal/nuget/$FeedSuffix"
-fi
-
 # I want things split line by line
 PrevIFS=$IFS
 IFS=$'\n'
diff --git a/eng/common/build.sh b/eng/common/build.sh
index 9767bb411a4..ec3e80d189e 100755
--- a/eng/common/build.sh
+++ b/eng/common/build.sh
@@ -92,7 +92,7 @@ runtime_source_feed=''
 runtime_source_feed_key=''
 
 properties=()
-while [[ $# > 0 ]]; do
+while [[ $# -gt 0 ]]; do
   opt="$(echo "${1/#--/-}" | tr "[:upper:]" "[:lower:]")"
   case "$opt" in
     -help|-h)
diff --git a/eng/common/core-templates/job/job.yml b/eng/common/core-templates/job/job.yml
index 5ce51840619..748c4f07a64 100644
--- a/eng/common/core-templates/job/job.yml
+++ b/eng/common/core-templates/job/job.yml
@@ -19,6 +19,8 @@ parameters:
   # publishing defaults
   artifacts: ''
   enableMicrobuild: false
+  enablePreviewMicrobuild: false
+  microbuildPluginVersion: 'latest'
   enableMicrobuildForMacAndLinux: false
   microbuildUseESRP: true
   enablePublishBuildArtifacts: false
@@ -71,6 +73,8 @@ jobs:
     templateContext: ${{ parameters.templateContext }}
 
   variables:
+  - name: AllowPtrToDetectTestRunRetryFiles
+    value: true
   - ${{ if ne(parameters.enableTelemetry, 'false') }}:
     - name: DOTNET_CLI_TELEMETRY_PROFILE
       value: '$(Build.Repository.Uri)'
@@ -128,6 +132,8 @@ jobs:
     - template: /eng/common/core-templates/steps/install-microbuild.yml
       parameters:
         enableMicrobuild: ${{ parameters.enableMicrobuild }}
+        enablePreviewMicrobuild: ${{ parameters.enablePreviewMicrobuild }}
+        microbuildPluginVersion: ${{ parameters.microbuildPluginVersion }}
         enableMicrobuildForMacAndLinux: ${{ parameters.enableMicrobuildForMacAndLinux }}
         microbuildUseESRP: ${{ parameters.microbuildUseESRP }}
         continueOnError: ${{ parameters.continueOnError }}
@@ -153,6 +159,8 @@ jobs:
     - template: /eng/common/core-templates/steps/cleanup-microbuild.yml
       parameters:
         enableMicrobuild: ${{ parameters.enableMicrobuild }}
+        enablePreviewMicrobuild: ${{ parameters.enablePreviewMicrobuild }}
+        microbuildPluginVersion: ${{ parameters.microbuildPluginVersion }}
         enableMicrobuildForMacAndLinux: ${{ parameters.enableMicrobuildForMacAndLinux }}
         continueOnError: ${{ parameters.continueOnError }}
 
diff --git a/eng/common/core-templates/job/publish-build-assets.yml b/eng/common/core-templates/job/publish-build-assets.yml
index b955fac6e13..c9ee8ffd8f1 100644
--- a/eng/common/core-templates/job/publish-build-assets.yml
+++ b/eng/common/core-templates/job/publish-build-assets.yml
@@ -91,8 +91,8 @@ jobs:
       fetchDepth: 3
       clean: true
 
-    - ${{ if eq(parameters.isAssetlessBuild, 'false') }}: 
-      - ${{ if eq(parameters.publishingVersion, 3) }}: 
+    - ${{ if eq(parameters.isAssetlessBuild, 'false') }}:
+      - ${{ if eq(parameters.publishingVersion, 3) }}:
         - task: DownloadPipelineArtifact@2
           displayName: Download Asset Manifests
           inputs:
@@ -117,7 +117,7 @@ jobs:
             flattenFolders: true
           condition: ${{ parameters.condition }}
           continueOnError: ${{ parameters.continueOnError }}
-    
+
     - task: NuGetAuthenticate@1
 
     # Populate internal runtime variables.
@@ -125,7 +125,7 @@ jobs:
       ${{ if eq(variables['System.TeamProject'], 'DevDiv') }}:
         parameters:
             legacyCredential: $(dn-bot-dnceng-artifact-feeds-rw)
-    
+
     - template: /eng/common/templates/steps/enable-internal-runtimes.yml
 
     - task: AzureCLI@2
@@ -145,7 +145,7 @@ jobs:
 
       condition: ${{ parameters.condition }}
       continueOnError: ${{ parameters.continueOnError }}
-    
+
     - task: powershell@2
       displayName: Create ReleaseConfigs Artifact
       inputs:
@@ -173,7 +173,7 @@ jobs:
             artifactName: AssetManifests
             displayName: 'Publish Merged Manifest'
             retryCountOnTaskFailure: 10 # for any logs being locked
-            sbomEnabled: false  # we don't need SBOM for logs
+            sbomEnabled: false # we don't need SBOM for logs
 
     - template: /eng/common/core-templates/steps/publish-build-artifacts.yml
       parameters:
@@ -190,7 +190,7 @@ jobs:
           BARBuildId: ${{ parameters.BARBuildId }}
           PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
           is1ESPipeline: ${{ parameters.is1ESPipeline }}
-
+          
       # Darc is targeting 8.0, so make sure it's installed
       - task: UseDotNet@2
         inputs:
@@ -218,4 +218,4 @@ jobs:
       - template: /eng/common/core-templates/steps/publish-logs.yml
         parameters:
           is1ESPipeline: ${{ parameters.is1ESPipeline }}
-          JobLabel: 'Publish_Artifacts_Logs'     
+          JobLabel: 'Publish_Artifacts_Logs'
diff --git a/eng/common/core-templates/post-build/post-build.yml b/eng/common/core-templates/post-build/post-build.yml
index b942a79ef02..3bed9cdb49d 100644
--- a/eng/common/core-templates/post-build/post-build.yml
+++ b/eng/common/core-templates/post-build/post-build.yml
@@ -1,106 +1,106 @@
 parameters:
-  # Which publishing infra should be used. THIS SHOULD MATCH THE VERSION ON THE BUILD MANIFEST.
-  # Publishing V1 is no longer supported
-  # Publishing V2 is no longer supported
-  # Publishing V3 is the default
-  - name: publishingInfraVersion
-    displayName: Which version of publishing should be used to promote the build definition?
-    type: number
-    default: 3
-    values:
-    - 3
-
-  - name: BARBuildId
-    displayName: BAR Build Id
-    type: number
-    default: 0
-
-  - name: PromoteToChannelIds
-    displayName: Channel to promote BARBuildId to
-    type: string
-    default: ''
-
-  - name: enableSourceLinkValidation
-    displayName: Enable SourceLink validation
-    type: boolean
-    default: false
-
-  - name: enableSigningValidation
-    displayName: Enable signing validation
-    type: boolean
-    default: true
-
-  - name: enableSymbolValidation
-    displayName: Enable symbol validation
-    type: boolean
-    default: false
-
-  - name: enableNugetValidation
-    displayName: Enable NuGet validation
-    type: boolean
-    default: true
-    
-  - name: publishInstallersAndChecksums
-    displayName: Publish installers and checksums
-    type: boolean
-    default: true
-    
-  - name: requireDefaultChannels
-    displayName: Fail the build if there are no default channel(s) registrations for the current build
-    type: boolean
-    default: false
-
-  - name: SDLValidationParameters
-    type: object
-    default:
-      enable: false
-      publishGdn: false
-      continueOnError: false
-      params: ''
-      artifactNames: ''
-      downloadArtifacts: true
-
-  - name: isAssetlessBuild
-    type: boolean
-    displayName: Is Assetless Build
-    default: false
-
-  # These parameters let the user customize the call to sdk-task.ps1 for publishing
-  # symbols & general artifacts as well as for signing validation
-  - name: symbolPublishingAdditionalParameters
-    displayName: Symbol publishing additional parameters
-    type: string
-    default: ''
-
-  - name: artifactsPublishingAdditionalParameters
-    displayName: Artifact publishing additional parameters
-    type: string
-    default: ''
-
-  - name: signingValidationAdditionalParameters
-    displayName: Signing validation additional parameters
-    type: string
-    default: ''
-
-  # Which stages should finish execution before post-build stages start
-  - name: validateDependsOn
-    type: object
-    default:
-    - build
-
-  - name: publishDependsOn
-    type: object
-    default:
-    - Validate
-
-  # Optional: Call asset publishing rather than running in a separate stage
-  - name: publishAssetsImmediately
-    type: boolean
-    default: false
-
-  - name: is1ESPipeline
-    type: boolean
-    default: false
+# Which publishing infra should be used. THIS SHOULD MATCH THE VERSION ON THE BUILD MANIFEST.
+# Publishing V1 is no longer supported
+# Publishing V2 is no longer supported
+# Publishing V3 is the default
+- name: publishingInfraVersion
+  displayName: Which version of publishing should be used to promote the build definition?
+  type: number
+  default: 3
+  values:
+  - 3
+
+- name: BARBuildId
+  displayName: BAR Build Id
+  type: number
+  default: 0
+
+- name: PromoteToChannelIds
+  displayName: Channel to promote BARBuildId to
+  type: string
+  default: ''
+
+- name: enableSourceLinkValidation
+  displayName: Enable SourceLink validation
+  type: boolean
+  default: false
+
+- name: enableSigningValidation
+  displayName: Enable signing validation
+  type: boolean
+  default: true
+
+- name: enableSymbolValidation
+  displayName: Enable symbol validation
+  type: boolean
+  default: false
+
+- name: enableNugetValidation
+  displayName: Enable NuGet validation
+  type: boolean
+  default: true
+
+- name: publishInstallersAndChecksums
+  displayName: Publish installers and checksums
+  type: boolean
+  default: true
+
+- name: requireDefaultChannels
+  displayName: Fail the build if there are no default channel(s) registrations for the current build
+  type: boolean
+  default: false
+
+- name: SDLValidationParameters
+  type: object
+  default:
+    enable: false
+    publishGdn: false
+    continueOnError: false
+    params: ''
+    artifactNames: ''
+    downloadArtifacts: true
+
+- name: isAssetlessBuild
+  type: boolean
+  displayName: Is Assetless Build
+  default: false
+
+# These parameters let the user customize the call to sdk-task.ps1 for publishing
+# symbols & general artifacts as well as for signing validation
+- name: symbolPublishingAdditionalParameters
+  displayName: Symbol publishing additional parameters
+  type: string
+  default: ''
+
+- name: artifactsPublishingAdditionalParameters
+  displayName: Artifact publishing additional parameters
+  type: string
+  default: ''
+
+- name: signingValidationAdditionalParameters
+  displayName: Signing validation additional parameters
+  type: string
+  default: ''
+
+# Which stages should finish execution before post-build stages start
+- name: validateDependsOn
+  type: object
+  default:
+  - build
+
+- name: publishDependsOn
+  type: object
+  default:
+  - Validate
+
+# Optional: Call asset publishing rather than running in a separate stage
+- name: publishAssetsImmediately
+  type: boolean
+  default: false
+
+- name: is1ESPipeline
+  type: boolean
+  default: false
 
 stages:
 - ${{ if or(eq( parameters.enableNugetValidation, 'true'), eq(parameters.enableSigningValidation, 'true'), eq(parameters.enableSourceLinkValidation, 'true'), eq(parameters.SDLValidationParameters.enable, 'true')) }}:
@@ -108,10 +108,10 @@ stages:
     dependsOn: ${{ parameters.validateDependsOn }}
     displayName: Validate Build Assets
     variables:
-      - template: /eng/common/core-templates/post-build/common-variables.yml
-      - template: /eng/common/core-templates/variables/pool-providers.yml
-        parameters:
-          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+    - template: /eng/common/core-templates/post-build/common-variables.yml
+    - template: /eng/common/core-templates/variables/pool-providers.yml
+      parameters:
+        is1ESPipeline: ${{ parameters.is1ESPipeline }}
     jobs:
     - job:
       displayName: NuGet Validation
@@ -134,28 +134,28 @@ stages:
             demands: ImageOverride -equals windows.vs2026preview.scout.amd64
 
       steps:
-        - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
-          parameters:
-            BARBuildId: ${{ parameters.BARBuildId }}
-            PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
-            is1ESPipeline: ${{ parameters.is1ESPipeline }}
-
-        - task: DownloadBuildArtifacts@0
-          displayName: Download Package Artifacts
-          inputs:
-            buildType: specific
-            buildVersionToDownload: specific
-            project: $(AzDOProjectName)
-            pipeline: $(AzDOPipelineId)
-            buildId: $(AzDOBuildId)
-            artifactName: PackageArtifacts
-            checkDownloadedFiles: true
-
-        - task: PowerShell@2
-          displayName: Validate
-          inputs:
-            filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/nuget-validation.ps1
-            arguments: -PackagesPath $(Build.ArtifactStagingDirectory)/PackageArtifacts/
+      - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
+        parameters:
+          BARBuildId: ${{ parameters.BARBuildId }}
+          PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
+          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Package Artifacts
+        inputs:
+          buildType: specific
+          buildVersionToDownload: specific
+          project: $(AzDOProjectName)
+          pipeline: $(AzDOPipelineId)
+          buildId: $(AzDOBuildId)
+          artifactName: PackageArtifacts
+          checkDownloadedFiles: true
+
+      - task: PowerShell@2
+        displayName: Validate
+        inputs:
+          filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/nuget-validation.ps1
+          arguments: -PackagesPath $(Build.ArtifactStagingDirectory)/PackageArtifacts/
 
     - job:
       displayName: Signing Validation
@@ -169,7 +169,7 @@ stages:
           os: windows
         # If it's not devdiv, it's dnceng
         ${{ else }}:
-          ${{ if eq(parameters.is1ESPipeline, true) }}:        
+          ${{ if eq(parameters.is1ESPipeline, true) }}:
             name: $(DncEngInternalBuildPool)
             image: 1es-windows-2022
             os: windows
@@ -177,46 +177,46 @@ stages:
             name: $(DncEngInternalBuildPool)
             demands: ImageOverride -equals windows.vs2026preview.scout.amd64
       steps:
-        - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
-          parameters:
-            BARBuildId: ${{ parameters.BARBuildId }}
-            PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
-            is1ESPipeline: ${{ parameters.is1ESPipeline }}
-
-        - task: DownloadBuildArtifacts@0
-          displayName: Download Package Artifacts
-          inputs:
-            buildType: specific
-            buildVersionToDownload: specific
-            project: $(AzDOProjectName)
-            pipeline: $(AzDOPipelineId)
-            buildId: $(AzDOBuildId)
-            artifactName: PackageArtifacts
-            checkDownloadedFiles: true
-
-        # This is necessary whenever we want to publish/restore to an AzDO private feed
-        # Since sdk-task.ps1 tries to restore packages we need to do this authentication here
-        # otherwise it'll complain about accessing a private feed.
-        - task: NuGetAuthenticate@1
-          displayName: 'Authenticate to AzDO Feeds'
-
-        # Signing validation will optionally work with the buildmanifest file which is downloaded from
-        # Azure DevOps above.
-        - task: PowerShell@2
-          displayName: Validate
-          inputs:
-            filePath: eng\common\sdk-task.ps1
-            arguments: -task SigningValidation -restore -msbuildEngine vs
-              /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts'
-              /p:SignCheckExclusionsFile='$(System.DefaultWorkingDirectory)/eng/SignCheckExclusionsFile.txt'
-              ${{ parameters.signingValidationAdditionalParameters }}
-
-        - template: /eng/common/core-templates/steps/publish-logs.yml
-          parameters:
-            is1ESPipeline: ${{ parameters.is1ESPipeline }}
-            StageLabel: 'Validation'
-            JobLabel: 'Signing'
-            BinlogToolVersion: $(BinlogToolVersion)
+      - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
+        parameters:
+          BARBuildId: ${{ parameters.BARBuildId }}
+          PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
+          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Package Artifacts
+        inputs:
+          buildType: specific
+          buildVersionToDownload: specific
+          project: $(AzDOProjectName)
+          pipeline: $(AzDOPipelineId)
+          buildId: $(AzDOBuildId)
+          artifactName: PackageArtifacts
+          checkDownloadedFiles: true
+
+      # This is necessary whenever we want to publish/restore to an AzDO private feed
+      # Since sdk-task.ps1 tries to restore packages we need to do this authentication here
+      # otherwise it'll complain about accessing a private feed.
+      - task: NuGetAuthenticate@1
+        displayName: 'Authenticate to AzDO Feeds'
+
+      # Signing validation will optionally work with the buildmanifest file which is downloaded from
+      # Azure DevOps above.
+      - task: PowerShell@2
+        displayName: Validate
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task SigningValidation -restore -msbuildEngine vs
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts'
+            /p:SignCheckExclusionsFile='$(System.DefaultWorkingDirectory)/eng/SignCheckExclusionsFile.txt'
+            ${{ parameters.signingValidationAdditionalParameters }}
+
+      - template: /eng/common/core-templates/steps/publish-logs.yml
+        parameters:
+          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+          StageLabel: 'Validation'
+          JobLabel: 'Signing'
+          BinlogToolVersion: $(BinlogToolVersion)
 
     - job:
       displayName: SourceLink Validation
@@ -230,7 +230,7 @@ stages:
           os: windows
         # If it's not devdiv, it's dnceng
         ${{ else }}:
-          ${{ if eq(parameters.is1ESPipeline, true) }}:          
+          ${{ if eq(parameters.is1ESPipeline, true) }}:
             name: $(DncEngInternalBuildPool)
             image: 1es-windows-2022
             os: windows
@@ -238,33 +238,33 @@ stages:
             name: $(DncEngInternalBuildPool)
             demands: ImageOverride -equals windows.vs2026preview.scout.amd64
       steps:
-        - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
-          parameters:
-            BARBuildId: ${{ parameters.BARBuildId }}
-            PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
-            is1ESPipeline: ${{ parameters.is1ESPipeline }}
-
-        - task: DownloadBuildArtifacts@0
-          displayName: Download Blob Artifacts
-          inputs:
-            buildType: specific
-            buildVersionToDownload: specific
-            project: $(AzDOProjectName)
-            pipeline: $(AzDOPipelineId)
-            buildId: $(AzDOBuildId)
-            artifactName: BlobArtifacts
-            checkDownloadedFiles: true
-
-        - task: PowerShell@2
-          displayName: Validate
-          inputs:
-            filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/sourcelink-validation.ps1
-            arguments: -InputPath $(Build.ArtifactStagingDirectory)/BlobArtifacts/ 
-              -ExtractPath $(Agent.BuildDirectory)/Extract/ 
-              -GHRepoName $(Build.Repository.Name) 
-              -GHCommit $(Build.SourceVersion)
-              -SourcelinkCliVersion $(SourceLinkCLIVersion)
-          continueOnError: true
+      - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
+        parameters:
+          BARBuildId: ${{ parameters.BARBuildId }}
+          PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
+          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          buildType: specific
+          buildVersionToDownload: specific
+          project: $(AzDOProjectName)
+          pipeline: $(AzDOPipelineId)
+          buildId: $(AzDOBuildId)
+          artifactName: BlobArtifacts
+          checkDownloadedFiles: true
+
+      - task: PowerShell@2
+        displayName: Validate
+        inputs:
+          filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/sourcelink-validation.ps1
+          arguments: -InputPath $(Build.ArtifactStagingDirectory)/BlobArtifacts/ 
+            -ExtractPath $(Agent.BuildDirectory)/Extract/ 
+            -GHRepoName $(Build.Repository.Name) 
+            -GHCommit $(Build.SourceVersion)
+            -SourcelinkCliVersion $(SourceLinkCLIVersion)
+        continueOnError: true
 
 - ${{ if ne(parameters.publishAssetsImmediately, 'true') }}:
   - stage: publish_using_darc
@@ -274,10 +274,10 @@ stages:
       dependsOn: ${{ parameters.validateDependsOn }}
     displayName: Publish using Darc
     variables:
-      - template: /eng/common/core-templates/post-build/common-variables.yml
-      - template: /eng/common/core-templates/variables/pool-providers.yml
-        parameters:
-          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+    - template: /eng/common/core-templates/post-build/common-variables.yml
+    - template: /eng/common/core-templates/variables/pool-providers.yml
+      parameters:
+        is1ESPipeline: ${{ parameters.is1ESPipeline }}
     jobs:
     - job:
       displayName: Publish Using Darc
@@ -291,42 +291,41 @@ stages:
           os: windows
         # If it's not devdiv, it's dnceng
         ${{ else }}:
-          ${{ if eq(parameters.is1ESPipeline, true) }}:          
+          ${{ if eq(parameters.is1ESPipeline, true) }}:
             name: NetCore1ESPool-Publishing-Internal
             image: windows.vs2022.amd64
             os: windows
           ${{ else }}:
             name: NetCore1ESPool-Publishing-Internal
-            demands: ImageOverride -equals windows.vs2022.amd64          
+            demands: ImageOverride -equals windows.vs2022.amd64
       steps:
-        - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
-          parameters:
-            BARBuildId: ${{ parameters.BARBuildId }}
-            PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
-            is1ESPipeline: ${{ parameters.is1ESPipeline }}
-
-        - task: NuGetAuthenticate@1
-
-        # Populate internal runtime variables.
-        - template: /eng/common/templates/steps/enable-internal-sources.yml
-          parameters:
-            legacyCredential: $(dn-bot-dnceng-artifact-feeds-rw)
-
-        - template: /eng/common/templates/steps/enable-internal-runtimes.yml
-
-        # Darc is targeting 8.0, so make sure it's installed
-        - task: UseDotNet@2
-          inputs:
-            version: 8.0.x
-
-        - task: AzureCLI@2
-          displayName: Publish Using Darc
-          inputs:
-            azureSubscription: "Darc: Maestro Production"
-            scriptType: ps
-            scriptLocation: scriptPath
-            scriptPath: $(System.DefaultWorkingDirectory)/eng/common/post-build/publish-using-darc.ps1
-            arguments: >
+      - template: /eng/common/core-templates/post-build/setup-maestro-vars.yml
+        parameters:
+          BARBuildId: ${{ parameters.BARBuildId }}
+          PromoteToChannelIds: ${{ parameters.PromoteToChannelIds }}
+          is1ESPipeline: ${{ parameters.is1ESPipeline }}
+
+      - task: NuGetAuthenticate@1
+
+      # Populate internal runtime variables.
+      - template: /eng/common/templates/steps/enable-internal-sources.yml
+        parameters:
+          legacyCredential: $(dn-bot-dnceng-artifact-feeds-rw)
+
+      - template: /eng/common/templates/steps/enable-internal-runtimes.yml
+
+      - task: UseDotNet@2
+        inputs:
+          version: 8.0.x
+
+      - task: AzureCLI@2
+        displayName: Publish Using Darc
+        inputs:
+          azureSubscription: "Darc: Maestro Production"
+          scriptType: ps
+          scriptLocation: scriptPath
+          scriptPath: $(System.DefaultWorkingDirectory)/eng/common/post-build/publish-using-darc.ps1
+          arguments: >
               -BuildId $(BARBuildId)
               -PublishingInfraVersion ${{ parameters.publishingInfraVersion }}
               -AzdoToken '$(System.AccessToken)'
diff --git a/eng/common/core-templates/steps/generate-sbom.yml b/eng/common/core-templates/steps/generate-sbom.yml
index c05f6502797..003f7eae0fa 100644
--- a/eng/common/core-templates/steps/generate-sbom.yml
+++ b/eng/common/core-templates/steps/generate-sbom.yml
@@ -5,7 +5,7 @@
 # IgnoreDirectories - Directories to ignore for SBOM generation. This will be passed through to the CG component detector.
 
 parameters:
-  PackageVersion: 10.0.0
+  PackageVersion: 11.0.0
   BuildDropPath: '$(System.DefaultWorkingDirectory)/artifacts'
   PackageName: '.NET'
   ManifestDirPath: $(Build.ArtifactStagingDirectory)/sbom
diff --git a/eng/common/core-templates/steps/install-microbuild-impl.yml b/eng/common/core-templates/steps/install-microbuild-impl.yml
new file mode 100644
index 00000000000..da22beb3f60
--- /dev/null
+++ b/eng/common/core-templates/steps/install-microbuild-impl.yml
@@ -0,0 +1,34 @@
+parameters:
+  - name: microbuildTaskInputs
+    type: object
+    default: {}
+
+  - name: microbuildEnv
+    type: object
+    default: {}
+
+  - name: enablePreviewMicrobuild
+    type: boolean
+    default: false
+
+  - name: condition
+    type: string
+
+  - name: continueOnError
+    type: boolean
+
+steps:
+- ${{ if eq(parameters.enablePreviewMicrobuild, true) }}:
+    - task: MicroBuildSigningPluginPreview@4
+      displayName: Install Preview MicroBuild plugin
+      inputs: ${{ parameters.microbuildTaskInputs }}
+      env: ${{ parameters.microbuildEnv }}
+      continueOnError: ${{ parameters.continueOnError }}
+      condition: ${{ parameters.condition }}
+- ${{ else }}:
+  - task: MicroBuildSigningPlugin@4
+    displayName: Install MicroBuild plugin
+    inputs: ${{ parameters.microbuildTaskInputs }}
+    env: ${{ parameters.microbuildEnv }}
+    continueOnError: ${{ parameters.continueOnError }}
+    condition: ${{ parameters.condition }}
diff --git a/eng/common/core-templates/steps/install-microbuild.yml b/eng/common/core-templates/steps/install-microbuild.yml
index 553fce66b94..4f4b56ed2a6 100644
--- a/eng/common/core-templates/steps/install-microbuild.yml
+++ b/eng/common/core-templates/steps/install-microbuild.yml
@@ -4,6 +4,8 @@ parameters:
   # Enable install tasks for MicroBuild on Mac and Linux
   # Will be ignored if 'enableMicrobuild' is false or 'Agent.Os' is 'Windows_NT'
   enableMicrobuildForMacAndLinux: false
+  # Enable preview version of MB signing plugin
+  enablePreviewMicrobuild: false
   # Determines whether the ESRP service connection information should be passed to the signing plugin.
   # This overlaps with _SignType to some degree. We only need the service connection for real signing.
   # It's important that the service connection not be passed to the MicroBuildSigningPlugin task in this place.
@@ -13,6 +15,8 @@ parameters:
   microbuildUseESRP: true
   # Microbuild installation directory
   microBuildOutputFolder: $(Agent.TempDirectory)/MicroBuild
+  # Microbuild version
+  microbuildPluginVersion: 'latest'
 
   continueOnError: false
 
@@ -69,42 +73,46 @@ steps:
     # YAML expansion, and Windows vs. Linux/Mac uses different service connections. However,
     # we can avoid including the MB install step if not enabled at all. This avoids a bunch of
     # extra pipeline authorizations, since most pipelines do not sign on non-Windows.
-    - task: MicroBuildSigningPlugin@4
-      displayName: Install MicroBuild plugin (Windows)
-      inputs:
-        signType: $(_SignType)
-        zipSources: false
-        feedSource: https://dnceng.pkgs.visualstudio.com/_packaging/MicroBuildToolset/nuget/v3/index.json
-        ${{ if eq(parameters.microbuildUseESRP, true) }}:
-          ConnectedServiceName: 'MicroBuild Signing Task (DevDiv)'
-          ${{ if eq(variables['System.TeamProject'], 'DevDiv') }}:
-            ConnectedPMEServiceName: 6cc74545-d7b9-4050-9dfa-ebefcc8961ea
-          ${{ else }}:
-            ConnectedPMEServiceName: 248d384a-b39b-46e3-8ad5-c2c210d5e7ca
-      env:
-        TeamName: $(_TeamName)
-        MicroBuildOutputFolderOverride: ${{ parameters.microBuildOutputFolder }}
-        SYSTEM_ACCESSTOKEN: $(System.AccessToken)
-      continueOnError: ${{ parameters.continueOnError }}
-      condition: and(succeeded(), eq(variables['Agent.Os'], 'Windows_NT'), in(variables['_SignType'], 'real', 'test'))
-
-    - ${{ if eq(parameters.enableMicrobuildForMacAndLinux, true) }}:
-      - task: MicroBuildSigningPlugin@4
-        displayName: Install MicroBuild plugin (non-Windows)
-        inputs:
+    - template: /eng/common/core-templates/steps/install-microbuild-impl.yml@self
+      parameters:
+        enablePreviewMicrobuild: ${{ parameters.enablePreviewMicrobuild }}
+        microbuildTaskInputs:
           signType: $(_SignType)
           zipSources: false
           feedSource: https://dnceng.pkgs.visualstudio.com/_packaging/MicroBuildToolset/nuget/v3/index.json
-          workingDirectory: ${{ parameters.microBuildOutputFolder }}
+          version: ${{ parameters.microbuildPluginVersion }}
           ${{ if eq(parameters.microbuildUseESRP, true) }}:
             ConnectedServiceName: 'MicroBuild Signing Task (DevDiv)'
             ${{ if eq(variables['System.TeamProject'], 'DevDiv') }}:
-              ConnectedPMEServiceName: beb8cb23-b303-4c95-ab26-9e44bc958d39
+              ConnectedPMEServiceName: 6cc74545-d7b9-4050-9dfa-ebefcc8961ea
             ${{ else }}:
-              ConnectedPMEServiceName: c24de2a5-cc7a-493d-95e4-8e5ff5cad2bc
-        env:
+              ConnectedPMEServiceName: 248d384a-b39b-46e3-8ad5-c2c210d5e7ca
+        microbuildEnv:
           TeamName: $(_TeamName)
           MicroBuildOutputFolderOverride: ${{ parameters.microBuildOutputFolder }}
           SYSTEM_ACCESSTOKEN: $(System.AccessToken)
         continueOnError: ${{ parameters.continueOnError }}
-        condition: and(succeeded(), ne(variables['Agent.Os'], 'Windows_NT'),  eq(variables['_SignType'], 'real'))
+        condition: and(succeeded(), eq(variables['Agent.Os'], 'Windows_NT'), in(variables['_SignType'], 'real', 'test'))
+
+    - ${{ if eq(parameters.enableMicrobuildForMacAndLinux, true) }}:
+      - template: /eng/common/core-templates/steps/install-microbuild-impl.yml@self
+        parameters:
+          enablePreviewMicrobuild: ${{ parameters.enablePreviewMicrobuild }}
+          microbuildTaskInputs:
+            signType: $(_SignType)
+            zipSources: false
+            feedSource: https://dnceng.pkgs.visualstudio.com/_packaging/MicroBuildToolset/nuget/v3/index.json
+            version: ${{ parameters.microbuildPluginVersion }}
+            workingDirectory: ${{ parameters.microBuildOutputFolder }}
+            ${{ if eq(parameters.microbuildUseESRP, true) }}:
+              ConnectedServiceName: 'MicroBuild Signing Task (DevDiv)'
+              ${{ if eq(variables['System.TeamProject'], 'DevDiv') }}:
+                ConnectedPMEServiceName: beb8cb23-b303-4c95-ab26-9e44bc958d39
+              ${{ else }}:
+                ConnectedPMEServiceName: c24de2a5-cc7a-493d-95e4-8e5ff5cad2bc
+          microbuildEnv:
+            TeamName: $(_TeamName)
+            MicroBuildOutputFolderOverride: ${{ parameters.microBuildOutputFolder }}
+            SYSTEM_ACCESSTOKEN: $(System.AccessToken)
+          continueOnError: ${{ parameters.continueOnError }}
+          condition: and(succeeded(), ne(variables['Agent.Os'], 'Windows_NT'),  eq(variables['_SignType'], 'real'))
diff --git a/eng/common/core-templates/steps/source-build.yml b/eng/common/core-templates/steps/source-build.yml
index b9c86c18ae4..acf16ed3496 100644
--- a/eng/common/core-templates/steps/source-build.yml
+++ b/eng/common/core-templates/steps/source-build.yml
@@ -24,7 +24,7 @@ steps:
     # in the default public locations.
     internalRuntimeDownloadArgs=
     if [ '$(dotnetbuilds-internal-container-read-token-base64)' != '$''(dotnetbuilds-internal-container-read-token-base64)' ]; then
-      internalRuntimeDownloadArgs='/p:DotNetRuntimeSourceFeed=https://ci.dot.net/internal /p:DotNetRuntimeSourceFeedKey=$(dotnetbuilds-internal-container-read-token-base64) --runtimesourcefeed https://ci.dot.net/internal --runtimesourcefeedkey '$(dotnetbuilds-internal-container-read-token-base64)''
+      internalRuntimeDownloadArgs='/p:DotNetRuntimeSourceFeed=https://ci.dot.net/internal /p:DotNetRuntimeSourceFeedKey=$(dotnetbuilds-internal-container-read-token-base64) --runtimesourcefeed https://ci.dot.net/internal --runtimesourcefeedkey $(dotnetbuilds-internal-container-read-token-base64)'
     fi
 
     buildConfig=Release
diff --git a/eng/common/core-templates/steps/source-index-stage1-publish.yml b/eng/common/core-templates/steps/source-index-stage1-publish.yml
index e9a694afa58..3ad83b8c307 100644
--- a/eng/common/core-templates/steps/source-index-stage1-publish.yml
+++ b/eng/common/core-templates/steps/source-index-stage1-publish.yml
@@ -1,6 +1,6 @@
 parameters:
-  sourceIndexUploadPackageVersion: 2.0.0-20250818.1
-  sourceIndexProcessBinlogPackageVersion: 1.0.1-20250818.1
+  sourceIndexUploadPackageVersion: 2.0.0-20250906.1
+  sourceIndexProcessBinlogPackageVersion: 1.0.1-20250906.1
   sourceIndexPackageSource: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json
   binlogPath: artifacts/log/Debug/Build.binlog
 
@@ -14,8 +14,8 @@ steps:
     workingDirectory: $(Agent.TempDirectory)
 
 - script: |
-    $(Agent.TempDirectory)/dotnet/dotnet tool install BinLogToSln --version ${{parameters.sourceIndexProcessBinlogPackageVersion}} --add-source ${{parameters.SourceIndexPackageSource}} --tool-path $(Agent.TempDirectory)/.source-index/tools
-    $(Agent.TempDirectory)/dotnet/dotnet tool install UploadIndexStage1 --version ${{parameters.sourceIndexUploadPackageVersion}} --add-source ${{parameters.SourceIndexPackageSource}} --tool-path $(Agent.TempDirectory)/.source-index/tools
+    $(Agent.TempDirectory)/dotnet/dotnet tool install BinLogToSln --version ${{parameters.sourceIndexProcessBinlogPackageVersion}} --source ${{parameters.sourceIndexPackageSource}} --tool-path $(Agent.TempDirectory)/.source-index/tools
+    $(Agent.TempDirectory)/dotnet/dotnet tool install UploadIndexStage1 --version ${{parameters.sourceIndexUploadPackageVersion}} --source ${{parameters.sourceIndexPackageSource}} --tool-path $(Agent.TempDirectory)/.source-index/tools
   displayName: "Source Index: Download netsourceindex Tools"
   # Set working directory to temp directory so 'dotnet' doesn't try to use global.json and use the repo's sdk.
   workingDirectory: $(Agent.TempDirectory)
diff --git a/eng/common/cross/build-rootfs.sh b/eng/common/cross/build-rootfs.sh
index 8abfb71f727..ef97671fe6c 100755
--- a/eng/common/cross/build-rootfs.sh
+++ b/eng/common/cross/build-rootfs.sh
@@ -72,7 +72,7 @@ __AlpinePackages+=" krb5-dev"
 __AlpinePackages+=" openssl-dev"
 __AlpinePackages+=" zlib-dev"
 
-__FreeBSDBase="13.4-RELEASE"
+__FreeBSDBase="13.5-RELEASE"
 __FreeBSDPkg="1.21.3"
 __FreeBSDABI="13"
 __FreeBSDPackages="libunwind"
@@ -295,9 +295,7 @@ while :; do
             ;;
         noble) # Ubuntu 24.04
             __CodeName=noble
-            if [[ -z "$__LLDB_Package" ]]; then
-                __LLDB_Package="liblldb-19-dev"
-            fi
+            __LLDB_Package="liblldb-19-dev"
             ;;
         stretch) # Debian 9
             __CodeName=stretch
@@ -383,7 +381,7 @@ while :; do
             ;;
         freebsd14)
             __CodeName=freebsd
-            __FreeBSDBase="14.2-RELEASE"
+            __FreeBSDBase="14.3-RELEASE"
             __FreeBSDABI="14"
             __SkipUnmount=1
             ;;
diff --git a/eng/common/darc-init.sh b/eng/common/darc-init.sh
index e889f439b8d..9f5ad6b763b 100755
--- a/eng/common/darc-init.sh
+++ b/eng/common/darc-init.sh
@@ -5,7 +5,7 @@ darcVersion=''
 versionEndpoint='https://maestro.dot.net/api/assets/darc-version?api-version=2020-02-20'
 verbosity='minimal'
 
-while [[ $# > 0 ]]; do
+while [[ $# -gt 0 ]]; do
   opt="$(echo "$1" | tr "[:upper:]" "[:lower:]")"
   case "$opt" in
     --darcversion)
diff --git a/eng/common/dotnet-install.sh b/eng/common/dotnet-install.sh
index 7b9d97e3bd4..61f302bb677 100755
--- a/eng/common/dotnet-install.sh
+++ b/eng/common/dotnet-install.sh
@@ -18,7 +18,7 @@ architecture=''
 runtime='dotnet'
 runtimeSourceFeed=''
 runtimeSourceFeedKey=''
-while [[ $# > 0 ]]; do
+while [[ $# -gt 0 ]]; do
   opt="$(echo "$1" | tr "[:upper:]" "[:lower:]")"
   case "$opt" in
     -version|-v)
diff --git a/eng/common/dotnet.sh b/eng/common/dotnet.sh
index 2ef68235675..f6d24871c1d 100755
--- a/eng/common/dotnet.sh
+++ b/eng/common/dotnet.sh
@@ -19,7 +19,7 @@ source $scriptroot/tools.sh
 InitializeDotNetCli true # install
 
 # Invoke acquired SDK with args if they are provided
-if [[ $# > 0 ]]; then
+if [[ $# -gt 0 ]]; then
   __dotnetDir=${_InitializeDotNetCli}
   dotnetPath=${__dotnetDir}/dotnet
   ${dotnetPath} "$@"
diff --git a/eng/common/internal-feed-operations.sh b/eng/common/internal-feed-operations.sh
index 9378223ba09..6299e7effd4 100755
--- a/eng/common/internal-feed-operations.sh
+++ b/eng/common/internal-feed-operations.sh
@@ -100,7 +100,7 @@ operation=''
 authToken=''
 repoName=''
 
-while [[ $# > 0 ]]; do
+while [[ $# -gt 0 ]]; do
   opt="$(echo "$1" | tr "[:upper:]" "[:lower:]")"
   case "$opt" in
     --operation)
diff --git a/eng/common/native/install-dependencies.sh b/eng/common/native/install-dependencies.sh
index 477a44f335b..abb47beacfa 100644
--- a/eng/common/native/install-dependencies.sh
+++ b/eng/common/native/install-dependencies.sh
@@ -24,14 +24,16 @@ case "$os" in
             apt update
 
             apt install -y build-essential gettext locales cmake llvm clang lld lldb liblldb-dev libunwind8-dev libicu-dev liblttng-ust-dev \
-                libssl-dev libkrb5-dev pigz cpio
+                libssl-dev libkrb5-dev pigz cpio ninja-build
 
             localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
-        elif [ "$ID" = "fedora" ] || [ "$ID" = "rhel" ] || [ "$ID" = "azurelinux" ]; then
+        elif [ "$ID" = "fedora" ] || [ "$ID" = "rhel" ] || [ "$ID" = "azurelinux" ] || [ "$ID" = "centos" ]; then
             pkg_mgr="$(command -v tdnf 2>/dev/null || command -v dnf)"
-            $pkg_mgr install -y cmake llvm lld lldb clang python curl libicu-devel openssl-devel krb5-devel lttng-ust-devel pigz cpio
+            $pkg_mgr install -y cmake llvm lld lldb clang python curl libicu-devel openssl-devel krb5-devel lttng-ust-devel pigz cpio ninja-build
+        elif [ "$ID" = "amzn" ]; then
+            dnf install -y cmake llvm lld lldb clang python libicu-devel openssl-devel krb5-devel lttng-ust-devel pigz cpio ninja-build
         elif [ "$ID" = "alpine" ]; then
-            apk add build-base cmake bash curl clang llvm-dev lld lldb krb5-dev lttng-ust-dev icu-dev openssl-dev pigz cpio
+            apk add build-base cmake bash curl clang llvm-dev lld lldb krb5-dev lttng-ust-dev icu-dev openssl-dev pigz cpio ninja
         else
             echo "Unsupported distro. distro: $ID"
             exit 1
@@ -52,6 +54,7 @@ brew "openssl@3"
 brew "pkgconf"
 brew "python3"
 brew "pigz"
+brew "ninja"
 EOF
         ;;
 
diff --git a/eng/common/post-build/redact-logs.ps1 b/eng/common/post-build/redact-logs.ps1
index 472d5bb562c..fc0218a013d 100644
--- a/eng/common/post-build/redact-logs.ps1
+++ b/eng/common/post-build/redact-logs.ps1
@@ -9,7 +9,8 @@ param(
   [Parameter(Mandatory=$false)][string] $TokensFilePath,
   [Parameter(ValueFromRemainingArguments=$true)][String[]]$TokensToRedact,
   [Parameter(Mandatory=$false)][string] $runtimeSourceFeed,
-  [Parameter(Mandatory=$false)][string] $runtimeSourceFeedKey)
+  [Parameter(Mandatory=$false)][string] $runtimeSourceFeedKey
+)
 
 try {
   $ErrorActionPreference = 'Stop'
diff --git a/eng/common/tools.ps1 b/eng/common/tools.ps1
index 049fe6db994..f6bde268379 100644
--- a/eng/common/tools.ps1
+++ b/eng/common/tools.ps1
@@ -157,9 +157,6 @@ function InitializeDotNetCli([bool]$install, [bool]$createSdkLocationFile) {
     return $global:_DotNetInstallDir
   }
 
-  # Don't resolve runtime, shared framework, or SDK from other locations to ensure build determinism
-  $env:DOTNET_MULTILEVEL_LOOKUP=0
-
   # Disable first run since we do not need all ASP.NET packages restored.
   $env:DOTNET_NOLOGO=1
 
@@ -225,7 +222,6 @@ function InitializeDotNetCli([bool]$install, [bool]$createSdkLocationFile) {
   # Make Sure that our bootstrapped dotnet cli is available in future steps of the Azure Pipelines build
   Write-PipelinePrependPath -Path $dotnetRoot
 
-  Write-PipelineSetVariable -Name 'DOTNET_MULTILEVEL_LOOKUP' -Value '0'
   Write-PipelineSetVariable -Name 'DOTNET_NOLOGO' -Value '1'
 
   return $global:_DotNetInstallDir = $dotnetRoot
diff --git a/eng/common/tools.sh b/eng/common/tools.sh
index c1841c9dfd0..6c121300ac7 100755
--- a/eng/common/tools.sh
+++ b/eng/common/tools.sh
@@ -115,9 +115,6 @@ function InitializeDotNetCli {
 
   local install=$1
 
-  # Don't resolve runtime, shared framework, or SDK from other locations to ensure build determinism
-  export DOTNET_MULTILEVEL_LOOKUP=0
-
   # Disable first run since we want to control all package sources
   export DOTNET_NOLOGO=1
 
@@ -166,7 +163,6 @@ function InitializeDotNetCli {
   # build steps from using anything other than what we've downloaded.
   Write-PipelinePrependPath -path "$dotnet_root"
 
-  Write-PipelineSetVariable -name "DOTNET_MULTILEVEL_LOOKUP" -value "0"
   Write-PipelineSetVariable -name "DOTNET_NOLOGO" -value "1"
 
   # return value
diff --git a/eng/templates/regression-test-jobs.yml b/eng/templates/regression-test-jobs.yml
index 049b9f140e0..2203c20388d 100644
--- a/eng/templates/regression-test-jobs.yml
+++ b/eng/templates/regression-test-jobs.yml
@@ -118,6 +118,28 @@ jobs:
         version: '10.0.100'
         installationPath: $(Pipeline.Workspace)/TestRepo/.dotnet
 
+    # Install the SDK that built the compiler (version from global.json)
+    # into the regression test's .dotnet so fsc.dll can find the runtime.
+    # Tries default feed first, then ci.dot.net/public (same fallback as eng/common).
+    - pwsh: |
+        $v = (Get-Content "$(Build.SourcesDirectory)/global.json" | ConvertFrom-Json).tools.dotnet
+        $d = "$(Pipeline.Workspace)/TestRepo/.dotnet"
+        $u = "https://builds.dotnet.microsoft.com/dotnet/scripts/v1"
+        if ($IsWindows) {
+          Invoke-WebRequest "$u/dotnet-install.ps1" -OutFile "$d/dotnet-install.ps1"
+          & "$d/dotnet-install.ps1" -Version $v -InstallDir $d -SkipNonVersionedFiles
+          if ($LASTEXITCODE -ne 0) {
+            & "$d/dotnet-install.ps1" -Version $v -InstallDir $d -SkipNonVersionedFiles -AzureFeed "https://ci.dot.net/public"
+          }
+        } else {
+          Invoke-WebRequest "$u/dotnet-install.sh" -OutFile "$d/dotnet-install.sh"
+          chmod +x "$d/dotnet-install.sh"
+          bash "$d/dotnet-install.sh" --version $v --install-dir $d --skip-non-versioned-files ||
+            bash "$d/dotnet-install.sh" --version $v --install-dir $d --skip-non-versioned-files --azure-feed "https://ci.dot.net/public"
+        }
+      displayName: Install compiler SDK for ${{ item.displayName }}
+      continueOnError: true
+
     - pwsh: |
         Set-Location $(Pipeline.Workspace)/TestRepo
         
diff --git a/global.json b/global.json
index 5f9b3ffbbfa..7f2589bb0b2 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "10.0.101",
+    "version": "11.0.100-preview.1.26078.121",
     "allowPrerelease": true,
     "paths": [
       ".dotnet",
@@ -9,7 +9,7 @@
     "errorMessage": "The .NET SDK could not be found, please run ./eng/common/dotnet.sh."
   },
   "tools": {
-    "dotnet": "10.0.101",
+    "dotnet": "11.0.100-preview.1.26078.121",
     "vs": {
       "version": "18.0",
       "components": [
@@ -19,7 +19,7 @@
     "xcopy-msbuild": "18.0.0"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "10.0.0-beta.26110.1",
+    "Microsoft.DotNet.Arcade.Sdk": "11.0.0-beta.26113.2",
     "Microsoft.DotNet.Helix.Sdk": "8.0.0-beta.23255.2"
   }
 }