fixes

pkg/uuid/uuid.go

@@ -0,0 +1,30 @@
+package uuid
+
+import (
+	"crypto/rand"
+	"fmt"
+)
+
+// UUID represents a UUID (RFC 4122)
+type UUID [16]byte
+
+// New generates a random UUID v4
+func New() UUID {
+	var u UUID
+	// Read random bytes
+	if _, err := rand.Read(u[:]); err != nil {
+		panic(fmt.Sprintf("failed to generate UUID: %v", err))
+	}
+
+	// Set version (4) and variant (RFC 4122)
+	u[6] = (u[6] & 0x0f) | 0x40 // Version 4
+	u[8] = (u[8] & 0x3f) | 0x80 // Variant RFC 4122
+
+	return u
+}
+
+// String returns the UUID in standard format (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
+func (u UUID) String() string {
+	return fmt.Sprintf("%08x-%04x-%04x-%04x-%012x",
+		u[0:4], u[4:6], u[6:8], u[8:10], u[10:16])
+}