diff --git a/cmd/joj3/conf/conf.go b/cmd/joj3/conf/conf.go
index 5c18a21..6242dd7 100644
--- a/cmd/joj3/conf/conf.go
+++ b/cmd/joj3/conf/conf.go
@@ -1,3 +1,5 @@
+// Package conf provides a configuration file parser for JOJ3.
+// The configuration file path is determined by the commit message.
 package conf
 
 import (
diff --git a/cmd/joj3/env/env.go b/cmd/joj3/env/env.go
index 8d9a01e..4535751 100644
--- a/cmd/joj3/env/env.go
+++ b/cmd/joj3/env/env.go
@@ -1,3 +1,4 @@
+// Package env stores the environment variables from actions environment.
 package env
 
 import (
diff --git a/internal/parser/clangtidy/formatter.go b/internal/parser/clangtidy/formatter.go
index 31d1b38..85ad3c2 100644
--- a/internal/parser/clangtidy/formatter.go
+++ b/internal/parser/clangtidy/formatter.go
@@ -1,4 +1,3 @@
-// Referenced from https://github.com/yuriisk/clang-tidy-converter/blob/master/clang_tidy_converter/parser/clang_tidy_parser.py
 package clangtidy
 
 import (
@@ -6,6 +5,7 @@ import (
 	"strings"
 )
 
+// Referenced from https://github.com/yuriisk/clang-tidy-converter/blob/master/clang_tidy_converter/parser/clang_tidy_parser.py
 type JsonMessage struct {
 	Type        string                 `json:"type"`
 	CheckName   string                 `json:"checkname"`