diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..cbffc8a
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,162 @@
+name: Build and Release
+
+on:
+  pull_request:
+    branches: main
+  push:
+    branches: main
+    tags:
+      - v*
+  workflow_dispatch:
+  release:
+    types: [published]
+
+
+# Automatically cancel any previous workflow on new push.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        # Include amd64 on all platforms.
+        goos: [windows, freebsd, openbsd, linux, dragonfly, darwin]
+        goarch: [amd64, 386]
+        exclude:
+          # Exclude i386 on darwin and dragonfly
+          # because they are not supported by go.
+          - goarch: 386
+            goos: dragonfly
+          - goarch: 386
+            goos: darwin
+        include:
+          # BEIGIN MacOS ARM64
+          - goos: darwin
+            goarch: arm64
+          # END MacOS ARM64
+          # BEGIN Linux ARM 5 6 7
+          - goos: linux
+            goarch: arm
+            goarm: 7
+          - goos: linux
+            goarch: arm
+            goarm: 6
+          - goos: linux
+            goarch: arm
+            goarm: 5
+          # END Linux ARM 5 6 7
+          # BEGIN Android ARM 8
+          - goos: android
+            goarch: arm64
+          # END Android ARM 8
+          # Windows ARM 7
+          - goos: windows
+            goarch: arm
+            goarm: 7
+          # BEGIN Other architectures
+          # BEGIN riscv64 & ARM64
+          - goos: linux
+            goarch: arm64
+          - goos: linux
+            goarch: riscv64
+          # END riscv64 & ARM64
+          # BEGIN MIPS
+          - goos: linux
+            goarch: mips64
+          - goos: linux
+            goarch: mips64le
+          - goos: linux
+            goarch: mipsle
+          - goos: linux
+            goarch: mipsle
+            gomips: -softfloat
+          - goos: linux
+            goarch: mips
+          - goos: linux
+            goarch: mips
+            gomips: -softfloat
+          # END MIPS
+          # BEGIN PPC
+          - goos: linux
+            goarch: ppc64
+          - goos: linux
+            goarch: ppc64le
+          # END PPC
+          # BEGIN FreeBSD ARM
+          - goos: freebsd
+            goarch: arm64
+          - goos: freebsd
+            goarch: arm
+            goarm: 7
+          # END FreeBSD ARM
+          # BEGIN S390X
+          - goos: linux
+            goarch: s390x
+          # END S390X
+          # END Other architectures
+          # BEGIN OPENBSD ARM
+          - goos: openbsd
+            goarch: arm64
+          - goos: openbsd
+            goarch: arm
+            goarm: 7
+          # END OPENBSD ARM
+      fail-fast: false
+
+    runs-on: ubuntu-latest
+    permissions: write-all
+    env:
+      GOOS: ${{ matrix.goos }}
+      GOARCH: ${{ matrix.goarch }}
+      GOARM: ${{ matrix.goarm }}
+      CGO_ENABLED: 0
+    steps:
+      - name: Checkout codebase
+        uses: actions/checkout@v3
+
+      - name: Show workflow information 
+        id: get_filename
+        run: |
+          export _NAME=$(jq ".[\"$GOOS-$GOARCH$GOARM$GOMIPS\"].friendlyName" -r < .github/build/friendly-filenames.json)
+          echo "GOOS: $GOOS, GOARCH: $GOARCH, GOARM: $GOARM, GOMIPS: $GOMIPS, RELEASE_NAME: $_NAME"
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '^1.18'
+          cache: false
+
+      - name: Build wafefficacy (any)
+        if: matrix.gomips != '-softfloat'
+        run: go build -o wafefficacy-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.goarm }}
+    
+      - name: Build wafefficacy (mips softfloat)
+        if: matrix.gomips == '-softfloat'
+        run: GOMIPS=softfloat go build -o wafefficacy-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.gomips }}
+
+      - name: Rename Windows
+        if: matrix.goos == 'windows'
+        run: mv wafefficacy-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.goarm }} wafefficacy-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.goarm }}.exe
+
+      - name: Build release zip
+        run: |
+          mkdir wafefficacy-release/
+          mv -v ./wafefficacy-${{ matrix.goos }}-* wafefficacy-release/wafefficacy
+          cp -v LICENSE *.md run.sh score.py  wafefficacy-release/
+          cp -vr nuclei/ wafefficacy-release/nuclei/
+          zip -r wafefficacy-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.goarm }}${{ matrix.gomips }}.zip wafefficacy-release/
+
+      - name: Upload files to Artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: wafefficacy-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.goarm }}${{ matrix.gomips }}
+          path: ./wafefficacy-*.zip
+
+      - name: Release builds on tag
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: ./wafefficacy-*.zip
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..16796c5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+reports/*.json
+wafefficacy
diff --git a/run.sh b/run.sh
index 537162e..02a5fcb 100755
--- a/run.sh
+++ b/run.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+command -v nuclei >/dev/null 2>&1 || { echo >&2 "error: nuclei is required, but was not found."; exit 1; }
+
 while getopts ht:b:c:i:k:o:p:r:w:v flag
 do
     case "${flag}" in
diff --git a/score.py b/score.py
index 55c0bc5..ee0b7dc 100644
--- a/score.py
+++ b/score.py
@@ -65,18 +65,27 @@ def score(self) -> None:
             print("False Positives", fp)
             sensitivity = tp / (tp + fn)
             specificity = tn / (tn + fp)
+            total = tp + fn + tn + fp
             balanced_accuracy = (sensitivity + specificity) / 2
             efficacy_score = balanced_accuracy * 100
             self.efficacy_scores[attack_type] = efficacy_score
-            print("Efficacy", self.percentage.format(efficacy_score))
+            print("Efficacy", self.percentage.format(efficacy_score), "over", total, "tests.")
         
+        if (true_positives + false_negatives) == 0:
+            # avoid dividing by zero
+            false_negatives = 1
+        if (true_negatives + false_positives) == 0:
+            # avoid dividing by zero
+            false_positives = 1
+
         print("------------- WAF Efficacy -------------" )
         sensitivity = true_positives / (true_positives + false_negatives)
         specificity = true_negatives / (true_negatives + false_positives)
         balanced_accuracy = (sensitivity + specificity) / 2
         efficacy_score = balanced_accuracy * 100
+        total = true_positives + false_negatives + true_negatives + false_positives
         self.efficacy_scores['overall'] = efficacy_score
-        print(self.percentage.format(efficacy_score))
+        print(self.percentage.format(efficacy_score), "over", total, "tests.")
         
         if self.outfile:
             with open(self.outfile, 'w') as fp: