---
 cmd/gqlintrospect/main.go | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/cmd/gqlintrospect/main.go b/cmd/gqlintrospect/main.go
index c425cca..3777c12 100644
--- a/cmd/gqlintrospect/main.go
+++ b/cmd/gqlintrospect/main.go
@@ -183,9 +183,14 @@ func typeReference(t Type) string {
 	return typeName
 }
 
+func escapeString(s string) string {
+	s = strings.Replace(s, `\`, `\\`, -1)
+	s = strings.Replace(s, `"`, `\"`, -1)
+	return s
+}
+
 func printDescription(desc string, prefix string) {
-	desc = strings.Replace(desc, `\`, `\\`, -1)
-	desc = strings.Replace(desc, `"`, `\"`, -1)
+	desc = escapeString(desc)
 	if !strings.Contains(desc, "\n") {
 		fmt.Printf("%s\"%s\"\n", prefix, desc)
 	} else {
@@ -197,6 +202,13 @@ func printDescription(desc string, prefix string) {
 	}
 }
 
+func printDeprecated(reason *string) {
+	fmt.Print(" @deprecated")
+	if reason != nil {
+		fmt.Printf("(reason: \"%s\")", escapeString(*reason))
+	}
+}
+
 func printType(t Type) {
 	if t.Description != nil && *t.Description != "" {
 		printDescription(*t.Description, "")
@@ -219,7 +231,11 @@ func printType(t Type) {
 			if e.Description != nil && *e.Description != "" {
 				printDescription(*e.Description, "\t")
 			}
-			fmt.Printf("	%s\n", e.Name)
+			fmt.Printf("	%s", e.Name)
+			if e.IsDeprecated {
+				printDeprecated(e.DeprecationReason)
+			}
+			fmt.Println()
 		}
 		fmt.Print("}\n\n")
 	case TypeKindInputObject:
@@ -265,7 +281,11 @@ func printType(t Type) {
 				}
 				fmt.Print(")")
 			}
-			fmt.Printf(": %s\n", typeReference(*f.Type))
+			fmt.Printf(": %s", typeReference(*f.Type))
+			if f.IsDeprecated {
+				printDeprecated(f.DeprecationReason)
+			}
+			fmt.Println()
 		}
 		fmt.Print("}\n\n")
 	}
-- 
2.37.0

---
 cmd/gqlintrospect/main.go | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/cmd/gqlintrospect/main.go b/cmd/gqlintrospect/main.go
index 3777c12..06c4bb3 100644
--- a/cmd/gqlintrospect/main.go
+++ b/cmd/gqlintrospect/main.go
@@ -291,6 +291,18 @@ func printType(t Type) {
 	}
 }
 
+var builtInScalars = map[string]bool{
+	"Int":     true,
+	"Float":   true,
+	"String":  true,
+	"Boolean": true,
+	"ID":      true,
+}
+
+func isBuiltInType(t Type) bool {
+	return strings.HasPrefix(*t.Name, "__") || builtInScalars[*t.Name]
+}
+
 func main() {
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancel()
@@ -329,7 +341,7 @@ func main() {
 	}
 
 	for _, t := range data.Schema.Types {
-		if t.Name != nil && strings.HasPrefix(*t.Name, "__") {
+		if isBuiltInType(t) {
 			continue
 		}
 		printType(t)
-- 
2.37.0

---
 cmd/gqlintrospect/main.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/gqlintrospect/main.go b/cmd/gqlintrospect/main.go
index 06c4bb3..1dbb814 100644
--- a/cmd/gqlintrospect/main.go
+++ b/cmd/gqlintrospect/main.go
@@ -167,7 +167,7 @@ func typeReference(t Type) string {
 	}
 
 	if ofType.Name == nil {
-		return "<invalid>"
+		panic("invalid type")
 	}
 	typeName := *ofType.Name
 	if len(modifiers) > 0 {
-- 
2.37.0