diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..8f30cfb
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,108 @@
+name: Build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: windows-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Get base version from version.json
+      id: version
+      uses: notiz-dev/github-action-json-property@release
+      with:
+        path: version.json
+        prop_path: 'version'
+
+    - name: Set branch name (push)
+      if: startsWith(github.ref, 'refs/heads/')
+      shell: pwsh
+      run: |
+        $branch = "${{ github.ref }}" -replace 'refs/heads/', '' -replace '[\s_]', '-'
+        echo "BRANCH_NAME=$branch" >> $env:GITHUB_ENV
+
+    - name: Set branch name (PR)
+      if: startsWith(github.ref, 'refs/pull/')
+      shell: pwsh
+      run: |
+        $prNumber = "${{ github.ref }}" -replace 'refs/pull/', '' -replace '/merge', ''
+        echo "BRANCH_NAME=PR-$prNumber" >> $env:GITHUB_ENV
+
+    - name: Set package version (master)
+      if: github.ref == 'refs/heads/master'
+      shell: pwsh
+      run: |
+        $numericVersion = "${{ steps.version.outputs.prop }}.${{ github.run_number }}"
+        echo "PACKAGE_VERSION=$numericVersion" >> $env:GITHUB_ENV
+        echo "ASSEMBLY_VERSION=$numericVersion.0" >> $env:GITHUB_ENV
+
+    - name: Set package version (non-master)
+      if: github.ref != 'refs/heads/master'
+      shell: pwsh
+      run: |
+        $sha = "${{ github.sha }}".Substring(0, 8)
+        $numericVersion = "${{ steps.version.outputs.prop }}.${{ github.run_number }}"
+        echo "PACKAGE_VERSION=$numericVersion-$env:BRANCH_NAME-$sha" >> $env:GITHUB_ENV
+        echo "ASSEMBLY_VERSION=$numericVersion.0" >> $env:GITHUB_ENV
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '8.x'
+
+    - name: Restore dependencies
+      run: dotnet restore Seq.Client.WindowsLogins.sln
+
+    - name: Build
+      run: dotnet build Seq.Client.WindowsLogins.sln --configuration Release --no-restore /p:Version="$env:PACKAGE_VERSION" /p:AssemblyVersion="$env:ASSEMBLY_VERSION" /p:FileVersion="$env:ASSEMBLY_VERSION"
+
+    - name: Test
+      run: dotnet test Seq.Client.WindowsLogins.sln --configuration Release --no-build --verbosity normal
+
+    - name: Create release package
+      id: create_package
+      shell: pwsh
+      run: |
+        $outputDir = "Seq.Client.WindowsLogins/bin/Release/net462"
+        $zipName = "Seq.Client.WindowsLogins-$env:PACKAGE_VERSION.zip"
+        Compress-Archive -Path "$outputDir/*" -DestinationPath $zipName
+        echo "ZIP_NAME=$zipName" >> $env:GITHUB_ENV
+
+    - name: Upload build artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: Seq.Client.WindowsLogins-${{ env.PACKAGE_VERSION }}
+        path: Seq.Client.WindowsLogins/bin/Release/net462/
+
+    - name: Comment on PR with artifact link
+      if: github.event_name == 'pull_request'
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const runUrl = `${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
+          const version = process.env.PACKAGE_VERSION || 'unknown';
+          await github.rest.issues.createComment({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            issue_number: context.issue.number,
+            body: `📦 **Build artifact ready:** \`Seq.Client.WindowsLogins-${version}\`\n\nDownload it from the [workflow run artifacts](${runUrl}#artifacts).`
+          });
+
+    - name: Create GitHub release
+      if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+      uses: softprops/action-gh-release@v2
+      with:
+        tag_name: v${{ env.PACKAGE_VERSION }}
+        name: Release v${{ env.PACKAGE_VERSION }}
+        files: ${{ env.ZIP_NAME }}
+        generate_release_notes: true
diff --git a/version.json b/version.json
new file mode 100644
index 0000000..dde0723
--- /dev/null
+++ b/version.json
@@ -0,0 +1,3 @@
+{
+  "version": "1.1"
+}