diff --git a/.vscode/cspell.json b/.vscode/cspell.json
index 5da0892cef7b..7b74502d6c2f 100644
--- a/.vscode/cspell.json
+++ b/.vscode/cspell.json
@@ -167,7 +167,11 @@
   "overrides": [
     {
       "filename": "eng/pipelines",
-      "words": ["azuresdkartifacts", "gdnbaselines", "policheck"]
+      "words": ["azuresdkartifacts", "gdnbaselines", "policheck", "issecret", "dlrw"]
+    },
+    {
+      "filename": "eng/tools/rush-runner.js",
+      "words": ["Jsons"]
     },
     {
       "filename": "sdk/apimanagement/api-management-custom-widgets-scaffolder/review/api-management-custom-widgets-scaffolder.api.md",
diff --git a/eng/pipelines/templates/jobs/ci.yml b/eng/pipelines/templates/jobs/ci.yml
index 2d91faa403f0..d6f5c38b0ebb 100644
--- a/eng/pipelines/templates/jobs/ci.yml
+++ b/eng/pipelines/templates/jobs/ci.yml
@@ -74,9 +74,16 @@ jobs:
           MatrixConfigs: ${{ parameters.MatrixConfigs }}
           MatrixFilters: ${{ parameters.MatrixFilters }}
           MatrixReplace: ${{ parameters.MatrixReplace }}
+          SparseCheckoutPaths: [ "sdk/", ".vscode"]
           CloudConfig:
             Cloud: Public
           AdditionalParameters:
             ServiceDirectory: ${{ parameters.ServiceDirectory }}
             Artifacts: ${{ parameters.Artifacts }}
             TestProxy: ${{ parameters.TestProxy }}
+          ${{ if eq(parameters.ServiceDirectory, 'auto') }}:
+            EnablePRGeneration: true
+            PreGenerationSteps:
+              - template: /eng/common/pipelines/templates/steps/save-package-properties.yml
+                parameters:
+                  ServiceDirectory: ${{parameters.ServiceDirectory}}
diff --git a/eng/pipelines/templates/steps/analyze.yml b/eng/pipelines/templates/steps/analyze.yml
index dfe7a8054d88..41e21b077c91 100644
--- a/eng/pipelines/templates/steps/analyze.yml
+++ b/eng/pipelines/templates/steps/analyze.yml
@@ -4,13 +4,22 @@ parameters:
   TestPipeline: false
 
 steps:
+  - template: /eng/common/pipelines/templates/steps/save-package-properties.yml
+    parameters:
+      ServiceDirectory: ${{parameters.ServiceDirectory}}
+
+  - template: /eng/pipelines/templates/steps/set-artifact-packages.yml
+    parameters:
+      PackageInfo: $(Build.ArtifactStagingDirectory)/PackageInfo
+      Artifacts: ${{ parameters.Artifacts }}
+
   - template: /eng/common/pipelines/templates/steps/check-spelling.yml
 
   - task: PowerShell@2
     inputs:
       targetType: 'filePath'
-      filePath: eng/scripts/spell-check-public-api.ps1
-      arguments: -ServiceDirectory ${{ parameters.ServiceDirectory }}
+      filePath: eng/scripts/spell-check-public-apis.ps1
+      arguments: -ChangedServices "$(ChangedServices)"
       pwsh: true
     displayName: Spell check public API
 
@@ -26,10 +35,9 @@ steps:
       ArtifactName: 'package-diffs'
       SbomEnabled: false
 
-
-  - template: /eng/common/pipelines/templates/steps/verify-readme.yml
+  - template: /eng/common/pipelines/templates/steps/verify-readmes.yml
     parameters:
-      ScanPath: $(Build.SourcesDirectory)/sdk/${{ parameters.ServiceDirectory }}
+      PackagePropertiesFolder: $(Build.ArtifactStagingDirectory)/PackageInfo
 
   - template: /eng/common/pipelines/templates/steps/verify-path-length.yml
     parameters:
@@ -46,7 +54,7 @@ steps:
 
   - template: /eng/common/pipelines/templates/steps/verify-samples.yml
     parameters:
-      ServiceDirectory: ${{ parameters.ServiceDirectory }}
+      ServiceDirectories: $(ChangedServicesCsv)
 
   - script: |
       npm ci
@@ -62,28 +70,21 @@ steps:
       node common/scripts/install-run-rush.js install
     displayName: "Install dependencies"
 
-  - template: /eng/pipelines/templates/steps/set-artifact-packages.yml
-    parameters:
-      Artifacts: ${{ parameters.Artifacts }}
-
   - script: |
-      node eng/tools/rush-runner.js build "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose -p max
+      node eng/tools/rush-runner.js build $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose -p max
     displayName: "Build libraries"
 
   - template: /eng/pipelines/templates/steps/run-eslint.yml
     parameters:
-      ServiceDirectory: ${{ parameters.ServiceDirectory }}
+      ServiceDirectories: $(ChangedServices)
 
   - pwsh: |
-      node eng/tools/rush-runner.js check-format "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose
+      node eng/tools/rush-runner.js check-format $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose
     displayName: "Check Format in Libraries"
 
-  - ${{ each artifact in parameters.Artifacts }}:
-      - template: /eng/common/pipelines/templates/steps/verify-changelog.yml
-        parameters:
-          PackageName: ${{artifact.name}}
-          ServiceName: ${{parameters.ServiceDirectory}}
-          ForRelease: false
+  - template: /eng/common/pipelines/templates/steps/verify-changelogs.yml
+    parameters:
+      PackagePropertiesFolder: $(Build.ArtifactStagingDirectory)/PackageInfo
 
   - task: ms.vss-governance-buildtask.governance-build-task-component-detection.ComponentGovernanceComponentDetection@0
     # ComponentGovernance is currently unable to run on pull requests of public projects. Running on non-PR
diff --git a/eng/pipelines/templates/steps/build.yml b/eng/pipelines/templates/steps/build.yml
index 804b85784a4b..d9f547ef28c6 100644
--- a/eng/pipelines/templates/steps/build.yml
+++ b/eng/pipelines/templates/steps/build.yml
@@ -13,32 +13,23 @@ steps:
 
   - pwsh: |
       $folder = "${{parameters.ServiceDirectory}}"
-      if ($folder -eq "*") { $folder = "" }
+      if ($folder -eq "*" -or $folder -eq "auto") { $folder = "" }
       echo "##vso[task.setvariable variable=folder]$folder"
     displayName: "Set folder variable for readme links"
 
+  # we are not passing service directory, so we only ever set dev build to true
   - template: /eng/common/pipelines/templates/steps/daily-dev-build-variable.yml
-    parameters:
-      ServiceDirectory: ${{ parameters.ServiceDirectory }}
 
   - script: |
       npm install ./eng/tools/versioning
-      node eng/tools/versioning/set-dev.js --build-id "$(Build.BuildNumber)" --repo-root "$(Build.SourcesDirectory)" --service "$(folder)"
+      node eng/tools/versioning/set-dev.js --build-id "$(Build.BuildNumber)" --repo-root "$(Build.SourcesDirectory)"
       node common/scripts/install-run-rush.js update
     condition: and(succeeded(),eq(variables['SetDevVersion'],'true'))
     displayName: "Update package versions for dev build"
 
-  - task: Powershell@2
-    inputs:
-      filePath: $(Build.SourcesDirectory)/eng/common/scripts/Save-Package-Properties.ps1
-      arguments: >
-        -ServiceDirectory ${{parameters.ServiceDirectory}}
-        -OutDirectory $(Build.ArtifactStagingDirectory)/PackageInfo
-        -AddDevVersion
-      pwsh: true
-      workingDirectory: $(Pipeline.Workspace)
-    displayName: Update package properties with dev version
-    condition: and(succeeded(),eq(variables['SetDevVersion'],'true'))
+  - template: /eng/common/pipelines/templates/steps/save-package-properties.yml
+    parameters:
+      ServiceDirectory: ${{parameters.ServiceDirectory}}
 
   - script: |
       node common/scripts/install-run-rush.js install
@@ -47,7 +38,9 @@ steps:
 
   - template: /eng/pipelines/templates/steps/set-artifact-packages.yml
     parameters:
+      PackageInfo: $(Build.ArtifactStagingDirectory)/PackageInfo
       Artifacts: ${{ parameters.Artifacts }}
+
   - ${{ if and(eq(variables['System.TeamProject'], 'internal'), in(variables['Build.Reason'], 'IndividualCI', 'BatchedCI')) }}:
     - task: AzureCLI@2
       inputs:
@@ -60,10 +53,8 @@ steps:
           sasToken=$(az storage container generate-sas --account-name azuresdkartifacts --name azure-sdk-for-js-rush-cache --permissions dlrw --auth-mode login --as-user --expiry $expiry --https-only -o tsv)
           echo "##vso[task.setvariable variable=rushBuildCacheCred;issecret=true;]$sasToken"
 
-  # Option "-p max" ensures parallelism is set to the number of cores on all platforms, which improves build times.
-  # The default on Windows is "cores - 1" (microsoft/rushstack#436).
-  - script: |
-      node eng/tools/rush-runner.js build "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose -p max
+  - pwsh: |
+      node eng/tools/rush-runner.js build $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose -p max
     displayName: "Build libraries"
     env:
       ${{ if and(eq(variables['System.TeamProject'], 'internal'), in(variables['Build.Reason'], 'IndividualCI', 'BatchedCI')) }}:
@@ -71,15 +62,15 @@ steps:
         RUSH_BUILD_CACHE_WRITE_ALLOWED: 1
 
   - script: |
-      node eng/tools/rush-runner.js build:samples "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose
-    displayName: "Build samples"
+      node eng/tools/rush-runner.js build:samples "$(ChangedServices)" -packages "$(ArtifactPackageNames)" --verbose
+    displayName: "Build samples for PR"
 
   - pwsh: |
       eng/tools/check-api-warning.ps1
     displayName: "Check api extractor output changes"
 
   - script: |
-      node eng/tools/rush-runner.js pack "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose
+      node eng/tools/rush-runner.js pack "$(ChangedServices)" -packages "$(ArtifactPackageNames)" --verbose
     displayName: "Pack libraries"
 
   # Unlink node_modules folders to significantly improve performance of subsequent tasks
@@ -93,18 +84,22 @@ steps:
       ServiceDirectory: ${{parameters.ServiceDirectory}}
 
   - pwsh: |
-      $artifacts = '${{ convertToJson(parameters.Artifacts) }}' | ConvertFrom-Json
+      $artifacts = Get-ChildItem -Recurse -Force "$(Build.ArtifactStagingDirectory)/PackageInfo/*.json" `
+          | ForEach-Object { $_.Name.Replace(".json", "") }
+
       foreach ($artifact in $artifacts)
       {
-        $artifactName = $artifact.name
-        Write-Host "Copying $artifactName artifacts to $(Build.ArtifactStagingDirectory)/$artifactName"
-        New-Item -Type Directory -Name $artifactName -Path $(Build.ArtifactStagingDirectory) > $null
-        Copy-Item sdk/${{parameters.ServiceDirectory}}/**/$artifactName-[0-9]*.[0-9]*.[0-9]*.tgz $(Build.ArtifactStagingDirectory)/$artifactName
-        Copy-Item sdk/${{parameters.ServiceDirectory}}/**/browser/$artifactName-[0-9]*.[0-9]*.[0-9]*.zip $(Build.ArtifactStagingDirectory)/$artifactName
-        if ($${{ parameters.IncludeRelease }} -eq $true -and $artifact.skipPublishDocMs -ne $true)
+        $artifactDetails = Get-Content -Raw $(Build.ArtifactStagingDirectory)/PackageInfo/$artifact.json | ConvertFrom-Json
+
+        Write-Host "Copying $artifact artifacts to $(Build.ArtifactStagingDirectory)/$artifact"
+        New-Item -Type Directory -Force -Name $artifact -Path $(Build.ArtifactStagingDirectory) > $null
+        Copy-Item sdk/$($artifactDetails.Service)/**/$artifact-[0-9]*.[0-9]*.[0-9]*.tgz $(Build.ArtifactStagingDirectory)/$artifact
+        Copy-Item sdk/$($artifactDetails.Service)/**/browser/$artifact-[0-9]*.[0-9]*.[0-9]*.zip $(Build.ArtifactStagingDirectory)/$artifact
+
+        if ($${{ parameters.IncludeRelease }} -eq $true -and $artifactDetails.ArtifactDetails.skipPublishDocMs -ne $true)
         {
-          New-Item -Type Directory -Name documentation -Path $(Build.ArtifactStagingDirectory)/$artifactName > $null
-          Copy-Item $(Build.SourcesDirectory)/docGen/$artifactName.zip $(Build.ArtifactStagingDirectory)/$artifactName/documentation
+          New-Item -Type Directory -Force -Name documentation -Path $(Build.ArtifactStagingDirectory)/$artifact > $null
+          Copy-Item $(Build.SourcesDirectory)/docGen/$artifact.zip $(Build.ArtifactStagingDirectory)/$artifact/documentation
         }
       }
     displayName: 'Copy Packages'
diff --git a/eng/pipelines/templates/steps/generate-doc.yml b/eng/pipelines/templates/steps/generate-doc.yml
index 828ffb0519ef..72af43d7dbd3 100644
--- a/eng/pipelines/templates/steps/generate-doc.yml
+++ b/eng/pipelines/templates/steps/generate-doc.yml
@@ -15,7 +15,17 @@ steps:
   - pwsh: |
       node $(Build.SourcesDirectory)/eng/tools/generate-doc/dist/index.js --serviceDir "${{parameters.ServiceDirectory}}"
     displayName: "Run Typedoc Docs"
+    condition: and(succeeded(), ne(variables['Build.Reason'], 'PullRequest'))
+
+  - pwsh: |
+      if ('$(ChangedServices)' -and '$(ChangedServices)' -notlike '*ChangedServices*') {
+        foreach($service in '$(ChangedServices)'.Split(" ")) {
+          node $(Build.SourcesDirectory)/eng/tools/generate-doc/dist/index.js --serviceDir "$service"
+        }
+      }
+    displayName: "Run Typedocs for PR"
+    condition: and(succeeded(), eq(variables['Build.Reason'], 'PullRequest'))
 
   - pwsh: |
       $(Build.SourcesDirectory)/eng/tools/compress-subfolders.ps1 "$(Build.SourcesDirectory)/docGen" "$(Build.SourcesDirectory)/docGen"
-    displayName: "Generate Typedoc Docs"
+    displayName: "Compress generated docs"
diff --git a/eng/pipelines/templates/steps/run-eslint.yml b/eng/pipelines/templates/steps/run-eslint.yml
index d12f49e20dfe..06e714f0f9dd 100644
--- a/eng/pipelines/templates/steps/run-eslint.yml
+++ b/eng/pipelines/templates/steps/run-eslint.yml
@@ -1,5 +1,5 @@
 parameters:
-  ServiceDirectory: ''
+  ServiceDirectories: ''
 
 steps:
   - script: |
@@ -8,5 +8,5 @@ steps:
 
   - pwsh: |
       node common/scripts/install-run-rush.js build -t @azure/eslint-plugin-azure-sdk -t @azure/monitor-opentelemetry-exporter
-      node eng/tools/rush-runner.js lint "${{parameters.ServiceDirectory}}" -p max
+      node eng/tools/rush-runner.js lint "${{parameters.ServiceDirectories}}" -p max
     displayName: "Build ESLint Plugin and Lint Libraries"
diff --git a/eng/pipelines/templates/steps/set-artifact-packages.yml b/eng/pipelines/templates/steps/set-artifact-packages.yml
index 50090c8258d9..8164c81bc668 100644
--- a/eng/pipelines/templates/steps/set-artifact-packages.yml
+++ b/eng/pipelines/templates/steps/set-artifact-packages.yml
@@ -1,12 +1,51 @@
 parameters:
+  PackageInfo: ''
   Artifacts: []
 steps:
+  # Package-Properties folder contains the package properties for all discovered packages that were either A) affected by the PR or
+  # B) explicitly present in the service directory. This repo splits the builds into two categories: "mgmt" and "dataplane". While
+  # a given directory may contain both, there will be a separate build definition to release the management packages. Due to this
+  # we need to artificially filter the packages to ensure that only the packages targeted for THAT ci.yml are built.
+  # When we merge the PR adding js - pullrequest, this code will also merge, meaning the public - <service> - ci builds will still operate
+  # EXACTLY the same as they did before the pipelinev3 change. This is important to ensure that we don't accidentally build the wrong packages
+  # while in the integration period. After we disable all the public `js - <service> - ci` builds, only the `js - pullrequest` build WONT provide
+  # an artifact list, which will allow the expand/contract. Meanwhile the internal builds will continue to provide the artifact list from their
+  # individual ci.yml and ci.mgmt.yml files.
   - pwsh: |
       $artifacts = '${{ convertToJson(parameters.Artifacts) }}' | ConvertFrom-Json
-      $packages = ""
-      foreach ($artifact in $artifacts)
-      {
-        $packages += "$($artifact.name),"
+      $knownArtifacts = @()
+      if ($artifacts) {
+        $knownArtifacts = $artifacts | ForEach-Object { $_.name }
       }
-      echo "##vso[task.setvariable variable=ArtifactPackageNames]$packages"
-    displayName: "Find Packages to build"
+
+      $packageProperties = Get-ChildItem -Recurse "${{ parameters.PackageInfo }}" *.json `
+        | Where-Object { if($knownArtifacts) { $knownArtifacts -contains $_.Name.Replace(".json", "") } else { $true } }
+
+      $pkgNames = $packageProperties | ForEach-Object { $_.Name.Replace(".json", "") }
+
+      $setting = $pkgNames -join ","
+      Write-Host "Setting ArtifactPackageNames to: `n$setting"
+      Write-Host "##vso[task.setvariable variable=ArtifactPackageNames;]$setting"
+    displayName: Resolve Targeted Packages
+    condition: eq(variables['ArtifactPackageNames'], '')
+
+  - pwsh: |
+      # set changed services given the set of changed packages, this will mean that
+      # ChangedServices will be appropriate for the batched set of packages if that is indeed how
+      # we set the targeted artifacts
+      $packageProperties = Get-ChildItem -Recurse "${{ parameters.PackageInfo }}" *.json `
+        | Foreach-Object { Get-Content -Raw -Path $_.FullName | ConvertFrom-Json }
+
+      $packageSet = "$(ArtifactPackageNames)" -split ","
+
+      $changedServicesArray = $packageProperties | Where-Object { $packageSet -contains $_.ArtifactName }
+        | ForEach-Object { $_.ServiceDirectory } | Get-Unique
+
+      $changedServices = $changedServicesArray -join " "
+      $commaChangedServices = $changedServicesArray -join ","
+      Write-Host "##vso[task.setvariable variable=ChangedServices;]$changedServices"
+      Write-Host "##vso[task.setvariable variable=ChangedServicesCsv;]$commaChangedServices"
+
+      Write-Host "This run is targeting: `n$(ArtifactPackageNames) in [$changedServices]"
+    displayName: Resolve Targeted Packages
+    condition: ne(variables['ArtifactPackageNames'], '')
diff --git a/eng/pipelines/templates/steps/test.yml b/eng/pipelines/templates/steps/test.yml
index a5e1c57d6ac6..ef90c99d2729 100644
--- a/eng/pipelines/templates/steps/test.yml
+++ b/eng/pipelines/templates/steps/test.yml
@@ -9,42 +9,47 @@ steps:
     parameters:
       AgentImage: ${{ parameters.OSName}}
 
+  - template: /eng/common/pipelines/templates/steps/save-package-properties.yml
+    parameters:
+      ServiceDirectory: ${{parameters.ServiceDirectory}}
+
   - script: |
       node common/scripts/install-run-rush.js install
     displayName: "Install dependencies"
 
   - template: /eng/pipelines/templates/steps/set-artifact-packages.yml
     parameters:
+      PackageInfo: $(Build.ArtifactStagingDirectory)/PackageInfo
       Artifacts: ${{ parameters.Artifacts }}
 
   # Option "-p max" ensures parallelism is set to the number of cores on all platforms, which improves build times.
   # The default on Windows is "cores - 1" (microsoft/rushstack#436).
   - script: |
-      node eng/tools/rush-runner.js build "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose -p max
+      node eng/tools/rush-runner.js build $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose -p max
     displayName: "Build libraries"
 
   # Option "-p max" ensures parallelism is set to the number of cores on all platforms, which improves build times.
   # The default on Windows is "cores - 1" (microsoft/rushstack#436).
   - script: |
-      node eng/tools/rush-runner.js build:test "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose -p max
+      node eng/tools/rush-runner.js build:test $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose -p max
     displayName: "Build test assets"
 
   - template: ../steps/use-node-test-version.yml
 
   - ${{ if eq(parameters.TestProxy, true) }}:
     - template: /eng/common/testproxy/test-proxy-standalone-tool.yml
-  
+
   # Option "-p max" ensures parallelism is set to the number of cores on all platforms, which improves build times.
   # The default on Windows is "cores - 1" (microsoft/rushstack#436).
   - script: |
-      node eng/tools/rush-runner.js unit-test:node "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose -p max
+      node eng/tools/rush-runner.js unit-test:node $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose -p max
     displayName: "Test libraries"
     condition: and(succeeded(),eq(variables['TestType'], 'node'))
 
   # Option "-p max" ensures parallelism is set to the number of cores on all platforms, which improves build times.
   # The default on Windows is "cores - 1" (microsoft/rushstack#436).
   - script: |
-      node eng/tools/rush-runner.js unit-test:browser "${{parameters.ServiceDirectory}}" -packages "$(ArtifactPackageNames)" --verbose -p max
+      node eng/tools/rush-runner.js unit-test:browser $(ChangedServices) -packages "$(ArtifactPackageNames)" --verbose -p max
     displayName: "Test libraries"
     condition: and(succeeded(),eq(variables['TestType'], 'browser'))
 
@@ -53,7 +58,7 @@ steps:
         copy $(Build.SourcesDirectory)/test-proxy.log $(Build.ArtifactStagingDirectory)
       displayName: 'Dump Test Proxy logs'
       condition: succeededOrFailed()
-      
+
   # Unlink node_modules folders to significantly improve performance of subsequent tasks
   # which need to walk the directory tree (and are hardcoded to follow symlinks).
   # Retry for 30 seconds, since this command may fail with error "Another rush command is already
diff --git a/eng/scripts/Language-Settings.ps1 b/eng/scripts/Language-Settings.ps1
index 6358d7795f13..e639c6fd4ede 100644
--- a/eng/scripts/Language-Settings.ps1
+++ b/eng/scripts/Language-Settings.ps1
@@ -6,6 +6,11 @@ $packagePattern = "*.tgz"
 $MetadataUri = "https://raw.githubusercontent.com/Azure/azure-sdk/main/_data/releases/latest/js-packages.csv"
 $GithubUri = "https://github.com/Azure/azure-sdk-for-js"
 $PackageRepositoryUri = "https://www.npmjs.com/package"
+$ReducedDependencyLookup = @{
+  'core' = @('@azure-rest/synapse-access-control', '@azure/arm-resources', '@azure/identity', '@azure/service-bus', '@azure/template')
+  'test-utils' = @('@azure-tests/perf-storage-blob', '@azure/arm-eventgrid', '@azure/ai-text-analytics', '@azure/identity', '@azure/template')
+  'identity' = @('@azure-tests/perf-storage-blob', '@azure/ai-text-analytics', '@azure/arm-resources', '@azure/identity-cache-persistence', '@azure/identity-vscode', '@azure/storage-blob', '@azure/template')
+}
 
 . "$PSScriptRoot/docs/Docs-ToC.ps1"
 . "$PSScriptRoot/docs/Docs-Onboarding.ps1"
@@ -25,6 +30,79 @@ function Get-javascript-EmitterAdditionalOptions([string]$projectDirectory) {
   return "--option @azure-tools/typespec-ts.emitter-output-dir=$projectDirectory/"
 }
 
+function Get-javascript-AdditionalValidationPackagesFromPackageSet {
+  param(
+    [Parameter(Mandatory=$true)]
+    $LocatedPackages,
+    [Parameter(Mandatory=$true)]
+    $diffObj,
+    [Parameter(Mandatory=$true)]
+    $AllPkgProps
+  )
+  $additionalValidationPackages = @()
+
+  function isOther($fileName) {
+    $startsWithPrefixes = @(".config", ".devcontainer", ".github", ".scripts", ".vscode", "common", "design", "documentation", "eng", "samples")
+
+    foreach ($prefix in $startsWithPrefixes) {
+      if ($fileName.StartsWith($prefix)) {
+        return $true
+      }
+    }
+
+    return $false
+  }
+
+  $changedServices = @()
+  foreach($file in $diffObj.ChangedFiles) {
+    $pathComponents = $file -split "/"
+    # handle changes only in sdk/<service>/<file>/<extension>
+    if ($pathComponents.Length -eq 3 -and $pathComponents[0] -eq "sdk") {
+      $changedServices += $pathComponents[1]
+    }
+
+    # handle any changes under sdk/<file>.<extension>
+    if ($pathComponents.Length -eq 2 -and $pathComponents[0] -eq "sdk") {
+      $changedServices += "template"
+    }
+  }
+
+  $othersChanged = $diffObj.ChangedFiles | Where-Object { isOther $_ }
+  $changedServices = $changedServices | Get-Unique
+
+  if ($othersChanged) {
+    $additionalPackages = $ReducedDependencyLookup["core"] | ForEach-Object { $me=$_; $AllPkgProps | Where-Object { $_.Name -eq $me } | Select-Object -First 1 }
+    $additionalValidationPackages += $additionalPackages
+  }
+
+  foreach ($changedService in $changedServices) {
+    if ($ReducedDependencyLookup.ContainsKey($changedService)) {
+      $additionalPackages = $ReducedDependencyLookup[$changedService] | ForEach-Object { $me=$_; $AllPkgProps | Where-Object { $_.Name -eq $me } | Select-Object -First 1 }
+      $additionalValidationPackages += $additionalPackages
+    }
+    else {
+      $additionalPackages = $AllPkgProps | Where-Object { $_.ServiceDirectory -eq $changedService }
+      $additionalValidationPackages += $additionalPackages
+    }
+  }
+
+  $uniqueResultSet = @()
+  foreach ($pkg in $additionalValidationPackages) {
+    if ($uniqueResultSet -notcontains $pkg -and $LocatedPackages -notcontains $pkg) {
+      $pkg.IncludedForValidation = $true
+      $uniqueResultSet += $pkg
+    }
+  }
+
+  Write-Host "Returning additional packages for validation: $($uniqueResultSet.Count)"
+  foreach ($pkg in $uniqueResultSet) {
+    Write-Host "  - $($pkg.Name)"
+  }
+
+  return $uniqueResultSet
+}
+
+
 function Get-javascript-PackageInfoFromRepo ($pkgPath, $serviceDirectory) {
   $projectPath = Join-Path $pkgPath "package.json"
   if (Test-Path $projectPath) {
@@ -40,10 +118,17 @@ function Get-javascript-PackageInfoFromRepo ($pkgPath, $serviceDirectory) {
     }
     $pkgProp.IsNewSdk = ($pkgProp.SdkType -eq "client") -or ($pkgProp.SdkType -eq "mgmt")
     $pkgProp.ArtifactName = $jsStylePkgName
+
+
+    if ($ReducedDependencyLookup.ContainsKey($pkgProp.ServiceDirectory)) {
+      $pkgProp.AdditionalValidationPackages = $ReducedDependencyLookup[$pkgProp.ServiceDirectory]
+    }
+
     # the constructor for the package properties object attempts to initialize CI artifacts on instantiation
     # of the class. however, due to the fact that we set the ArtifactName _after_ the constructor is called,
     # we need to call it again here to ensure the CI artifacts are properly initialized
     $pkgProp.InitializeCIArtifacts()
+
     return $pkgProp
   }
   return $null
diff --git a/eng/scripts/spell-check-public-apis.ps1 b/eng/scripts/spell-check-public-apis.ps1
new file mode 100644
index 000000000000..3e818ef0e895
--- /dev/null
+++ b/eng/scripts/spell-check-public-apis.ps1
@@ -0,0 +1,46 @@
+<#
+.SYNOPSIS
+Spell checks JS public API surface as exported to review/**/*.md. This script invokes
+against multiple service directories.
+
+.DESCRIPTION
+Checks spelling of package's public API. Some packages may be excluded by
+criteria in the cspell.json config. The precise list of files to scan is
+determined by cspell. If a package is opted out in the cspell.json a command
+will still be issued to scan that folder but cspell will report 0 files checked.
+
+.PARAMETER ChangedServices
+The list of service directories that have been changed in the PR. Space separated list of service directories.
+
+.EXAMPLE
+$(ChangedServices) is set in set-artifact-packages.yml
+./spell-check-public-apis.ps1 -ChangedServices $(ChangedServices)
+
+Spell check all public API specs for all services under `sdk` that have been changed in the PR.
+
+#>
+[CmdletBinding()]
+param (
+  [Parameter(mandatory = $true)]
+  [string]$ChangedServices
+)
+
+Set-StrictMode -Version 3.0
+$allSuccess = $true
+
+if ($ChangedServices) {
+  $changed = $ChangedServices.Split(" ")
+
+  foreach ($service in $changed) {
+    &"$PSScriptRoot/spell-check-public-api.ps1" -ServiceDirectory $service
+
+    if($LASTEXITCODE -ne 0) {
+      $allSuccess = $false
+    }
+  }
+}
+
+if (-not $allSuccess) {
+  Write-Error "One or more service directories failed spell check, check above output for details."
+  exit 1
+}
diff --git a/eng/tools/rush-runner.js b/eng/tools/rush-runner.js
index 68560ca1a514..480546bbf2aa 100644
--- a/eng/tools/rush-runner.js
+++ b/eng/tools/rush-runner.js
@@ -66,7 +66,7 @@ const parseArgs = () => {
     else {
       if (arg && arg !== "*") {
         // exclude empty value and special value "*" meaning all libraries
-        services.push(arg);
+        arg.split(" ").forEach(serviceDirectory => services.push(serviceDirectory));
       }
     }
   }
@@ -92,6 +92,59 @@ const getPackageJsons = (searchDir) => {
   return sdkDirectories.concat(perfTestDirectories).filter((f) => fs.existsSync(f)); // only keep paths for files that actually exist
 };
 
+const restrictedToPackages = [
+  "@azure/abort-controller",
+  "@azure/core-amqp",
+  "@azure/core-auth",
+  "@azure/core-client",
+  "@azure/core-http-compat",
+  "@azure/core-lro",
+  "@azure/core-paging",
+  "@azure/core-rest-pipeline",
+  "@azure/core-sse",
+  "@azure/core-tracing",
+  "@azure/core-util",
+  "@azure/core-xml",
+  "@azure/logger",
+  "@azure-rest/core-client",
+  "@typespec/ts-http-runtime",
+  "@azure/identity",
+  "@azure/arm-resources"
+];
+
+/**
+ * Helper function that determines the rush command flag to use based on each individual package name for the 'build' check.
+ *
+ * If the targeted package is one of the restricted packages with a ton of dependents, we only want to run that package
+ * and not all of its dependents.
+ * @param packageNames string[] An array of strings containing the packages names to run the action on.
+ */
+const getDirectionMappedPackages = (packageNames) => {
+  const mappedPackages = [];
+
+  for (const packageName of packageNames) {
+    // Build command without any additional option should build the project and downstream
+    // If service is configured to run only a set of downstream projects then build all projects leading to them to support testing
+    // If the package is a core package, azure-identity or arm-resources then build only the package,
+    // otherwise build the package and all its dependents
+    var rushCommandFlag = "--impacted-by";
+
+    if (restrictedToPackages.includes(packageName)) {
+      // if this is one of our restricted packages with a ton of deps, make it targeted
+      // as including all dependents will be too much
+      rushCommandFlag = "--to";
+    }
+    else if (actionComponents.length == 1) {
+      // else we are building the project and its dependents
+      rushCommandFlag = "--from";
+    }
+
+    mappedPackages.push([rushCommandFlag, packageName]);
+  }
+
+  return mappedPackages;
+};
+
 const getServicePackages = (baseDir, serviceDirs, artifactNames) => {
   const packageNames = [];
   const packageDirs = [];
@@ -133,6 +186,7 @@ const flatMap = (arr, f) => {
 };
 
 const [baseDir, action, serviceDirs, rushParams, artifactNames] = parseArgs();
+const actionComponents = action.toLowerCase().split(":");
 
 const [packageNames, packageDirs] = getServicePackages(baseDir, serviceDirs, artifactNames);
 
@@ -147,11 +201,21 @@ function rushRunAll(direction, packages) {
   spawnNode(baseDir, "common/scripts/install-run-rush.js", action, ...params, ...rushParams);
 }
 
+/**
+ * Helper function to invoke the rush logic split up by direction.
+ *
+ * @param packagesWithDirection string[] Any array of strings containing ["direction packageName"...]
+ */
+function rushRunAllWithDirection(packagesWithDirection) {
+  const invocation = packagesWithDirection.flatMap(([direction, packageName]) => [direction, packageName]);
+  spawnNode(baseDir, "common/scripts/install-run-rush.js", action, ...invocation, ...rushParams);
+}
+
 /**
  * Helper function to get the relative path of a package directory from an absolute
  * one
- * 
- * @param {string} absolutePath absolute path to a package 
+ *
+ * @param {string} absolutePath absolute path to a package
  * @returns either the relative path of the package starting from the "sdk" directory
  *          or the just the absolute path itself if "sdk" if not found
  */
@@ -166,33 +230,22 @@ if (isReducedTestScopeEnabled) {
   console.log(`Found reduced test matrix configured for ${serviceDirs}.`);
   packageNames.push(...reducedDependencyTestMatrix[serviceDirs]);
 }
+const packagesWithDirection = getDirectionMappedPackages(packageNames);
 const rushx_runner_path = path.join(baseDir, "common/scripts/install-run-rushx.js");
 if (serviceDirs.length === 0) {
   spawnNode(baseDir, "common/scripts/install-run-rush.js", action, ...rushParams);
 } else {
-  const actionComponents = action.toLowerCase().split(":");
   switch (actionComponents[0]) {
     case "build":
-      // Build command without any additional option should build the project and downstream
-      // If service is configured to run only a set of downstream projects then build all projects leading to them to support testing
-      // if this is build:test for any non-configured package service then all impacted projects downstream and it's dependents should be built
-      var rushCommandFlag = "--impacted-by";
-      if (isReducedTestScopeEnabled) {
-        // reduced preconfigured set of projects and it's required projects
-        rushCommandFlag = "--to";
-      }
-      else if (actionComponents.length == 1) {
-        rushCommandFlag = "--from";
-      }
-
-      rushRunAll(rushCommandFlag, packageNames);
+      rushRunAllWithDirection(packagesWithDirection);
       break;
 
     case "test":
     case "unit-test":
     case "integration-test":
       var rushCommandFlag = "--impacted-by";
-      if (isReducedTestScopeEnabled) {
+
+      if (isReducedTestScopeEnabled || serviceDirs.length > 1) {
         // If a service is configured to have reduced test matrix then run rush test only for those projects
         rushCommandFlag = "--only";
       }
diff --git a/sdk/pullrequest.yml b/sdk/pullrequest.yml
new file mode 100644
index 000000000000..076b5d29654b
--- /dev/null
+++ b/sdk/pullrequest.yml
@@ -0,0 +1,24 @@
+pr:
+  branches:
+    include:
+    - main
+    - feature/*
+    - hotfix/*
+    - release/*
+    - pipelinev3*
+  paths:
+    include:
+    - "*"
+
+    exclude:
+    - sdk/cosmos
+
+parameters:
+  - name: Service
+    type: string
+    default: auto
+
+extends:
+  template: /eng/pipelines/templates/stages/archetype-sdk-client.yml
+  parameters:
+    ServiceDirectory: ${{ parameters.Service }}