diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000000..324d309ae1
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,38 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.0"
+
+      - name: Get dependencies
+        run: go mod download
+
+      - name: Run tests
+        run: go test ./...
+
+  style:
+    name: Style
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.0"
+
+      - name: Check formatting
+        run: test -z "$(go fmt ./...)"
diff --git a/README.md b/README.md
index c2bec0368b..8d30a9993b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # learn-cicd-starter (Notely)
+![Tests](https://github.com/Sashozk/learn-cicd-starter/actions/workflows/ci.yml/badge.svg)
 
 This repo contains the starter code for the "Notely" application for the "Learn CICD" course on [Boot.dev](https://boot.dev).
 
@@ -21,3 +22,5 @@ go build -o notely && ./notely
 *This starts the server in non-database mode.* It will serve a simple webpage at `http://localhost:8080`.
 
 You do *not* need to set up a database or any interactivity on the webpage yet. Instructions for that will come later in the course!
+
+Sasho Zikov's version of Boot.dev's Notely app.
diff --git a/internal/auth/auth.go b/internal/auth/auth.go
index f969aacf63..69f07002c0 100644
--- a/internal/auth/auth.go
+++ b/internal/auth/auth.go
@@ -2,6 +2,7 @@ package auth
 
 import (
 	"errors"
+	"fmt"
 	"net/http"
 	"strings"
 )
@@ -21,3 +22,7 @@ func GetAPIKey(headers http.Header) (string, error) {
 
 	return splitAuth[1], nil
 }
+
+func main() {
+	fmt.Println("hello world!")
+}
diff --git a/internal/auth/auth_test.go b/internal/auth/auth_test.go
new file mode 100644
index 0000000000..8e573ea807
--- /dev/null
+++ b/internal/auth/auth_test.go
@@ -0,0 +1,37 @@
+package auth
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestGetAPIKey(t *testing.T) {
+	t.Run("returns key when header is valid", func(t *testing.T) {
+		h := http.Header{}
+		h.Set("Authorization", "ApiKey abc123")
+		got, err := GetAPIKey(h)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if got != "abc123" {
+			t.Fatalf("expected abc123, got %q", got)
+		}
+	})
+
+	t.Run("returns ErrNoAuthHeaderIncluded when header missing", func(t *testing.T) {
+		h := http.Header{}
+		_, err := GetAPIKey(h)
+		if err != ErrNoAuthHeaderIncluded {
+			t.Fatalf("expected ErrNoAuthHeaderIncluded, got %v", err)
+		}
+	})
+
+	t.Run("returns error when header malformed", func(t *testing.T) {
+		h := http.Header{}
+		h.Set("Authorization", "Bearer abc123")
+		_, err := GetAPIKey(h)
+		if err == nil {
+			t.Fatalf("expected error for malformed header, got nil")
+		}
+	})
+}