diff --git a/build/mixin-completions-core.sh b/build/mixin-completions-core.sh
new file mode 100755
index 000000000..cd339f97c
--- /dev/null
+++ b/build/mixin-completions-core.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+set -e
+
+# Get the OAuth token from the git config
+result=$(git config --get-regexp '.*extraheader' '^AUTHORIZATION:')
+basicToken=$(echo "$result" | sed 's/.*AUTHORIZATION: basic //')
+oauthToken=$(echo "$basicToken" | base64 -d | cut -d':' -f2)
+
+# Get the completions core version from package.json
+completionsCoreVersion=$(node -p "require('./package.json').completionsCore")
+
+# Clone the vscode-copilot-completions repository
+git clone -b completions-port "https://vscode:$oauthToken@github.com/microsoft/vscode-copilot-completions.git" --depth 1 src/extension/completions-core
+
+# Navigate to the cloned directory and checkout the specific version
+pushd src/extension/completions-core
+git checkout "$completionsCoreVersion"
+popd
+
+# Remove the existing file and rename the .txt version
+rm src/extension/completions/vscode-node/completionsCoreContribution.ts
+mv src/extension/completions/vscode-node/completionsCoreContribution.ts.txt src/extension/completions/vscode-node/completionsCoreContribution.ts
\ No newline at end of file
diff --git a/build/pre-release.yml b/build/pre-release.yml
index ba9c0df40..e9d7c5e23 100644
--- a/build/pre-release.yml
+++ b/build/pre-release.yml
@@ -97,18 +97,7 @@ extends:
           Remove-Item -Recurse -Force ../vscode-capi
         displayName: mixin
 
-      - pwsh: |
-          $result = git config --get-regexp .*extraheader ^AUTHORIZATION:
-          $basicToken = $result -split "AUTHORIZATION: basic " | Select-Object -Last 1
-          $oauthToken = [System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String($basicToken)) -split ":" | Select-Object -Last 1
-          $PackageJson = Get-Content -Path package.json -Raw | ConvertFrom-Json
-          $CompletionsCoreVersion = $PackageJson.completionsCore
-          git clone -b completions-port https://vscode:$oauthToken@github.com/microsoft/vscode-copilot-completions.git --depth 1 src/extension/completions-core
-          pushd src/extension/completions-core
-          git checkout $CompletionsCoreVersion
-          popd
-          rm src/extension/completions/vscode-node/completionsCoreContribution.ts
-          mv src/extension/completions/vscode-node/completionsCoreContribution.ts.txt src/extension/completions/vscode-node/completionsCoreContribution.ts
+      - script: ./build/mixin-completions-core.sh
         condition: and(succeeded(), eq(${{ parameters.mixinCompletionsCore }}, true))
         displayName: Mixin the completions core repo
 
@@ -176,18 +165,7 @@ extends:
       - script: npm run setup:dotnet
         displayName: Install dotnet cli
 
-      - pwsh: |
-          $result = git config --get-regexp .*extraheader ^AUTHORIZATION:
-          $basicToken = $result -split "AUTHORIZATION: basic " | Select-Object -Last 1
-          $oauthToken = [System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String($basicToken)) -split ":" | Select-Object -Last 1
-          $PackageJson = Get-Content -Path package.json -Raw | ConvertFrom-Json
-          $CompletionsCoreVersion = $PackageJson.completionsCore
-          git clone -b completions-port https://vscode:$oauthToken@github.com/microsoft/vscode-copilot-completions.git --depth 1 src/extension/completions-core
-          pushd src/extension/completions-core
-          git checkout $CompletionsCoreVersion
-          popd
-          rm src/extension/completions/vscode-node/completionsCoreContribution.ts
-          mv src/extension/completions/vscode-node/completionsCoreContribution.ts.txt src/extension/completions/vscode-node/completionsCoreContribution.ts
+      - script: ./build/mixin-completions-core.sh
         condition: and(succeeded(), eq(${{ parameters.mixinCompletionsCore }}, true))
         displayName: Mixin the completions core repo
 
diff --git a/build/release.yml b/build/release.yml
index e2703c33d..9ef46d18d 100644
--- a/build/release.yml
+++ b/build/release.yml
@@ -99,18 +99,7 @@ extends:
           Remove-Item -Recurse -Force ../vscode-capi
         displayName: mixin
 
-      - pwsh: |
-          $result = git config --get-regexp .*extraheader ^AUTHORIZATION:
-          $basicToken = $result -split "AUTHORIZATION: basic " | Select-Object -Last 1
-          $oauthToken = [System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String($basicToken)) -split ":" | Select-Object -Last 1
-          $PackageJson = Get-Content -Path package.json -Raw | ConvertFrom-Json
-          $CompletionsCoreVersion = $PackageJson.completionsCore
-          git clone -b completions-port https://vscode:$oauthToken@github.com/microsoft/vscode-copilot-completions.git --depth 1 src/extension/completions-core
-          pushd src/extension/completions-core
-          git checkout $CompletionsCoreVersion
-          popd
-          rm src/extension/completions/vscode-node/completionsCoreContribution.ts
-          mv src/extension/completions/vscode-node/completionsCoreContribution.ts.txt src/extension/completions/vscode-node/completionsCoreContribution.ts
+      - script: ./build/mixin-completions-core.sh
         condition: and(succeeded(), eq(${{ parameters.mixinCompletionsCore }}, true))
         displayName: Mixin the completions core repo
 
@@ -178,18 +167,7 @@ extends:
       - script: npm run setup:dotnet
         displayName: Install dotnet cli
 
-      - pwsh: |
-          $result = git config --get-regexp .*extraheader ^AUTHORIZATION:
-          $basicToken = $result -split "AUTHORIZATION: basic " | Select-Object -Last 1
-          $oauthToken = [System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String($basicToken)) -split ":" | Select-Object -Last 1
-          $PackageJson = Get-Content -Path package.json -Raw | ConvertFrom-Json
-          $CompletionsCoreVersion = $PackageJson.completionsCore
-          git clone -b completions-port https://vscode:$oauthToken@github.com/microsoft/vscode-copilot-completions.git --depth 1 src/extension/completions-core
-          pushd src/extension/completions-core
-          git checkout $CompletionsCoreVersion
-          popd
-          rm src/extension/completions/vscode-node/completionsCoreContribution.ts
-          mv src/extension/completions/vscode-node/completionsCoreContribution.ts.txt src/extension/completions/vscode-node/completionsCoreContribution.ts
+      - script: ./build/mixin-completions-core.sh
         condition: and(succeeded(), eq(${{ parameters.mixinCompletionsCore }}, true))
         displayName: Mixin the completions core repo