diff --git a/.builder/action.yml b/.builder/action.yml
new file mode 100644
index 000000000..04ae20766
--- /dev/null
+++ b/.builder/action.yml
@@ -0,0 +1,68 @@
+name: "Home Assistant builder"
+description: "Multi-purpose cross-compile docker builder"
+inputs:
+  args:
+    description: "Arguments passed to the builder"
+    required: true
+    default: "--help"
+runs:
+  using: "composite"
+  steps:
+    - shell: bash
+      id: version
+      run: |
+        input=$(echo "${{ github.action_path }}" | cut -d"/" -f8 )
+        if [[ "${input}" == "master" ]] || [[ -z "${input}" ]]; then
+          input="latest"
+        fi
+        echo "::set-output name=version::${input}"
+
+    - uses: home-assistant/actions/helpers/cas@master
+
+    - shell: bash
+      run: |
+        docker pull ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }}
+
+    - shell: bash
+      run: |
+        for j in {1..15}; do
+          if CAS_API_KEY= cas authenticate --silent --signerID notary@home-assistant.io docker://ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }}; then
+            exit 0
+          fi
+          sleep $((5 * j))
+        done
+
+        echo "Invalid signature!"
+        exit 1
+
+    - shell: bash
+      id: builder
+      run: |
+        builder=$(docker images ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }} -q)
+        echo "::set-output name=id::$builder"
+
+    - shell: bash
+      id: build
+      run: |
+        env > "${{ github.action_path }}/env_file"
+        sed -i "/\(HOME\|TERM\|PWD\|HOSTNAME\|PATH\|SHLVL\|USER\|GOROOT\)/d" "${{ github.action_path }}/env_file"
+
+        docker run --rm --privileged \
+            -v /var/run/docker.sock:/var/run/docker.sock:ro \
+            -v ~/.docker:/root/.docker \
+            -v ${{ github.workspace }}:/data \
+            --env-file "${{ github.action_path }}/env_file" \
+            ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }} \
+            ${{ inputs.args }}
+
+    - shell: bash
+      id: verify
+      run: |
+        docker images \
+          --format "table {{.Repository}}:{{.Tag}}\t{{.Size}}" \
+          --filter reference="*/*" \
+          --filter reference="*" \
+          --filter since=${{ steps.builder.outputs.id }}
+branding:
+  icon: "home"
+  color: "blue"