diff --git a/internal/conf/conf.go b/internal/conf/conf.go
index 1d1c118..c6fc558 100644
--- a/internal/conf/conf.go
+++ b/internal/conf/conf.go
@@ -14,98 +14,9 @@ import (
 	"time"
 
 	"github.com/go-git/go-git/v5"
-	"github.com/joint-online-judge/JOJ3/internal/stage"
 	"github.com/koding/multiconfig"
 )
 
-type ConfStage struct {
-	Name     string
-	Group    string
-	Executor struct {
-		Name string
-		With struct {
-			Default stage.Cmd
-			Cases   []OptionalCmd
-		}
-	}
-	Parsers []struct {
-		Name string
-		With interface{}
-	}
-}
-
-type ConfGroup struct {
-	Name           string
-	MaxCount       int
-	TimePeriodHour int
-}
-
-type Conf struct {
-	Name                string `default:"unknown"`
-	LogPath             string `default:""`
-	ActorCsvPath        string `default:""`
-	ExpireUnixTimestamp int64  `default:"-1"`
-	MaxTotalScore       int    `default:"-1"`
-	Stage               struct {
-		SandboxExecServer string `default:"localhost:5051"`
-		SandboxToken      string `default:""`
-		OutputPath        string `default:"joj3_result.json"`
-		Stages            []ConfStage
-	}
-	Teapot struct {
-		LogPath               string `default:"/home/tt/.cache/joint-teapot-debug.log"`
-		EnvFilePath           string `default:"/home/tt/.config/teapot/teapot.env"`
-		ScoreboardPath        string `default:"scoreboard.csv"`
-		FailedTablePath       string `default:"failed-table.md"`
-		GradingRepoName       string `default:""`
-		SkipIssue             bool   `default:"false"`
-		SkipScoreboard        bool   `default:"false"`
-		SkipFailedTable       bool   `default:"false"`
-		SubmitterInIssueTitle bool   `default:"true"`
-		Groups                []ConfGroup
-	}
-}
-
-type OptionalCmd struct {
-	Args   *[]string
-	Env    *[]string
-	Stdin  *stage.CmdFile
-	Stdout *stage.CmdFile
-	Stderr *stage.CmdFile
-
-	CPULimit     *uint64
-	RealCPULimit *uint64
-	ClockLimit   *uint64
-	MemoryLimit  *uint64
-	StackLimit   *uint64
-	ProcLimit    *uint64
-	CPURateLimit *uint64
-	CPUSetLimit  *string
-
-	CopyIn       *map[string]stage.CmdFile
-	CopyInCached *map[string]string
-	CopyInDir    *string
-
-	CopyOut       *[]string
-	CopyOutCached *[]string
-	CopyOutMax    *uint64
-	CopyOutDir    *string
-
-	TTY               *bool
-	StrictMemoryLimit *bool
-	DataSegmentLimit  *bool
-	AddressSpaceLimit *bool
-}
-
-type ConventionalCommit struct {
-	Type        string
-	Scope       string
-	Description string
-	Group       string
-	Body        string
-	Footer      string
-}
-
 func GetCommitMsg() (msg string, err error) {
 	r, err := git.PlainOpen(".")
 	if err != nil {
diff --git a/internal/conf/model.go b/internal/conf/model.go
new file mode 100644
index 0000000..af20477
--- /dev/null
+++ b/internal/conf/model.go
@@ -0,0 +1,93 @@
+package conf
+
+import (
+	"github.com/joint-online-judge/JOJ3/internal/stage"
+)
+
+type ConfStage struct {
+	Name     string
+	Group    string
+	Executor struct {
+		Name string
+		With struct {
+			Default stage.Cmd
+			Cases   []OptionalCmd
+		}
+	}
+	Parsers []struct {
+		Name string
+		With interface{}
+	}
+}
+
+type ConfGroup struct {
+	Name           string
+	MaxCount       int
+	TimePeriodHour int
+}
+
+type Conf struct {
+	Name                string `default:"unknown"`
+	LogPath             string `default:""`
+	ActorCsvPath        string `default:""`
+	ExpireUnixTimestamp int64  `default:"-1"`
+	MaxTotalScore       int    `default:"-1"`
+	Stage               struct {
+		SandboxExecServer string `default:"localhost:5051"`
+		SandboxToken      string `default:""`
+		OutputPath        string `default:"joj3_result.json"`
+		Stages            []ConfStage
+	}
+	Teapot struct {
+		LogPath               string `default:"/home/tt/.cache/joint-teapot-debug.log"`
+		EnvFilePath           string `default:"/home/tt/.config/teapot/teapot.env"`
+		ScoreboardPath        string `default:"scoreboard.csv"`
+		FailedTablePath       string `default:"failed-table.md"`
+		GradingRepoName       string `default:""`
+		SkipIssue             bool   `default:"false"`
+		SkipScoreboard        bool   `default:"false"`
+		SkipFailedTable       bool   `default:"false"`
+		SubmitterInIssueTitle bool   `default:"true"`
+		Groups                []ConfGroup
+	}
+}
+
+type OptionalCmd struct {
+	Args   *[]string
+	Env    *[]string
+	Stdin  *stage.CmdFile
+	Stdout *stage.CmdFile
+	Stderr *stage.CmdFile
+
+	CPULimit     *uint64
+	RealCPULimit *uint64
+	ClockLimit   *uint64
+	MemoryLimit  *uint64
+	StackLimit   *uint64
+	ProcLimit    *uint64
+	CPURateLimit *uint64
+	CPUSetLimit  *string
+
+	CopyIn       *map[string]stage.CmdFile
+	CopyInCached *map[string]string
+	CopyInDir    *string
+
+	CopyOut       *[]string
+	CopyOutCached *[]string
+	CopyOutMax    *uint64
+	CopyOutDir    *string
+
+	TTY               *bool
+	StrictMemoryLimit *bool
+	DataSegmentLimit  *bool
+	AddressSpaceLimit *bool
+}
+
+type ConventionalCommit struct {
+	Type        string
+	Scope       string
+	Description string
+	Group       string
+	Body        string
+	Footer      string
+}