Standardize --version output to include Go runtime and target platform

go.mod

@@ -1,6 +1,6 @@
 module github.com/UnitVectorY-Labs/clip4llm
 
-go 1.26 // GOVERSION
+go 1.26.0 // GOVERSION
 
 require github.com/atotto/clipboard v0.1.4
 

main.go

@@ -8,6 +8,7 @@ import (
 	"io/fs"
 	"log"
 	"os"
+	"runtime"
 	"runtime/debug"
 	"path/filepath"
 	"strings"
@@ -47,7 +48,7 @@ func main() {
 	flag.Parse()
 
 	if *showVersion {
-		fmt.Println("Version:", Version)
+		fmt.Println(formatVersionOutput("clip4llm", Version))
 		return
 	}
 
@@ -397,3 +398,10 @@ func parseCommaSeparated(input string) []string {
 	}
 	return result
 }
+
+func formatVersionOutput(projectName, version string) string {
+	if version != "" && !strings.HasPrefix(version, "v") {
+		version = "v" + version
+	}
+	return fmt.Sprintf("%s version %s (%s, %s/%s)", projectName, version, runtime.Version(), runtime.GOOS, runtime.GOARCH)
+}

main_test.go

@@ -1,8 +1,40 @@
 package main
 
-import "testing"
+import (
+	"fmt"
+	"runtime"
+	"testing"
+)
 
 // TestGreet is a basic unit test for the Greet function
 func TestGreet(t *testing.T) {
 	main()
 }
+
+func TestFormatVersionOutput(t *testing.T) {
+	tests := []struct {
+		name    string
+		version string
+		want    string
+	}{
+		{
+			name:    "adds v prefix when missing",
+			version: "1.2.3",
+			want:    fmt.Sprintf("clip4llm version v1.2.3 (%s, %s/%s)", runtime.Version(), runtime.GOOS, runtime.GOARCH),
+		},
+		{
+			name:    "preserves existing v prefix",
+			version: "v2.3.4",
+			want:    fmt.Sprintf("clip4llm version v2.3.4 (%s, %s/%s)", runtime.Version(), runtime.GOOS, runtime.GOARCH),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := formatVersionOutput("clip4llm", tt.version)
+			if got != tt.want {
+				t.Fatalf("formatVersionOutput() = %q, want %q", got, tt.want)
+			}
+		})
+	}
+}