diff --git a/internal/parser/clangtidy/score.go b/internal/parser/clangtidy/score.go
index 52bb4e5..3689edb 100644
--- a/internal/parser/clangtidy/score.go
+++ b/internal/parser/clangtidy/score.go
@@ -2,8 +2,9 @@ package clangtidy
 
 import (
 	"fmt"
-	"sort"
 	"strings"
+
+	"github.com/joint-online-judge/JOJ3/pkg/utils"
 )
 
 func GetResult(jsonMessages []JsonMessage, conf Conf) (int, string) {
@@ -33,21 +34,14 @@ func GetResult(jsonMessages []JsonMessage, conf Conf) (int, string) {
 			}
 		}
 	}
-	type kv struct {
-		Key   string
-		Value int
-	}
-	var ss []kv
-	for k, v := range categoryCount {
-		ss = append(ss, kv{k, v})
-	}
-	sort.Slice(ss, func(i, j int) bool {
-		if ss[i].Value == ss[j].Value {
-			return ss[i].Key < ss[j].Key
-		}
-		return ss[i].Value > ss[j].Value
-	})
-	for i, kv := range ss {
+	sortedMap := utils.SortMap(categoryCount,
+		func(i, j utils.Pair[string, int]) bool {
+			if i.Value == j.Value {
+				return i.Key < j.Key
+			}
+			return i.Value > j.Value
+		})
+	for i, kv := range sortedMap {
 		comment += fmt.Sprintf("%d. %s: %d\n", i+1, kv.Key, kv.Value)
 	}
 	return score, comment
diff --git a/internal/parser/cpplint/parser.go b/internal/parser/cpplint/parser.go
index 9d83e42..7c448f5 100644
--- a/internal/parser/cpplint/parser.go
+++ b/internal/parser/cpplint/parser.go
@@ -5,8 +5,10 @@ import (
 	"log/slog"
 	"regexp"
 	"strconv"
+	"strings"
 
 	"github.com/joint-online-judge/JOJ3/internal/stage"
+	"github.com/joint-online-judge/JOJ3/pkg/utils"
 )
 
 type Conf struct {
@@ -21,18 +23,19 @@ func Parse(executorResult stage.ExecutorResult, conf Conf) stage.ParserResult {
 	re := regexp.MustCompile(pattern)
 	matches := re.FindAllStringSubmatch(stderr, -1)
 	score := 0
-	comment := ""
+	comment := "### Test results summary\n\n"
+	categoryCount := map[string]int{}
 	for _, match := range matches {
-		fileName := match[1]
-		lineNum, err := strconv.Atoi(match[2])
-		if err != nil {
-			slog.Error("parse lineNum", "error", err)
-			return stage.ParserResult{
-				Score:   0,
-				Comment: fmt.Sprintf("Unexpected parser error: %s.", err),
-			}
-		}
-		message := match[3]
+		// fileName := match[1]
+		// lineNum, err := strconv.Atoi(match[2])
+		// if err != nil {
+		// 	slog.Error("parse lineNum", "error", err)
+		// 	return stage.ParserResult{
+		// 		Score:   0,
+		// 		Comment: fmt.Sprintf("Unexpected parser error: %s.", err),
+		// 	}
+		// }
+		// message := match[3]
 		category := match[4]
 		confidence, err := strconv.Atoi(match[5])
 		if err != nil {
@@ -43,9 +46,21 @@ func Parse(executorResult stage.ExecutorResult, conf Conf) stage.ParserResult {
 			}
 		}
 		score -= confidence
-		// TODO: add more detailed comment, just re-assemble for now
-		comment += fmt.Sprintf("%s:%d:  %s  [%s] [%d]\n",
-			fileName, lineNum, message, category, confidence)
+		parts := strings.Split(category, "/")
+		if len(parts) > 0 {
+			category := parts[0]
+			categoryCount[category] += 1
+		}
+	}
+	sortedMap := utils.SortMap(categoryCount,
+		func(i, j utils.Pair[string, int]) bool {
+			if i.Value == j.Value {
+				return i.Key < j.Key
+			}
+			return i.Value > j.Value
+		})
+	for i, kv := range sortedMap {
+		comment += fmt.Sprintf("%d. %s: %d\n", i+1, kv.Key, kv.Value)
 	}
 	return stage.ParserResult{
 		Score:   score,
diff --git a/pkg/utils/map.go b/pkg/utils/map.go
new file mode 100644
index 0000000..ba07f87
--- /dev/null
+++ b/pkg/utils/map.go
@@ -0,0 +1,19 @@
+package utils
+
+import "sort"
+
+type Pair[K comparable, V any] struct {
+	Key   K
+	Value V
+}
+
+func SortMap[K comparable, V any](m map[K]V, less func(i, j Pair[K, V]) bool) []Pair[K, V] {
+	pairs := make([]Pair[K, V], 0, len(m))
+	for k, v := range m {
+		pairs = append(pairs, Pair[K, V]{k, v})
+	}
+	sort.Slice(pairs, func(i, j int) bool {
+		return less(pairs[i], pairs[j])
+	})
+	return pairs
+}