diff --git a/internal/executors/sandbox/executor.go b/internal/executors/sandbox/executor.go
index d8cbd08..edadfa1 100644
--- a/internal/executors/sandbox/executor.go
+++ b/internal/executors/sandbox/executor.go
@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
+	"os"
+	"path/filepath"
 
 	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage"
 	"github.com/criyle/go-judge/pb"
@@ -24,6 +26,25 @@ func (e *Sandbox) Run(cmd stage.Cmd) (*stage.Result, error) {
 			cmd.CopyIn[k] = stage.CmdFile{FileID: &fileID}
 		}
 	}
+	if cmd.CopyInCwd {
+		err := filepath.Walk(".",
+			func(path string, info os.FileInfo, err error) error {
+				if err != nil {
+					return err
+				}
+				absPath, err := filepath.Abs(path)
+				if err != nil {
+					return err
+				}
+				if !info.IsDir() {
+					cmd.CopyIn[path] = stage.CmdFile{Src: &absPath}
+				}
+				return nil
+			})
+		if err != nil {
+			return nil, err
+		}
+	}
 	req := &pb.Request{Cmd: convertPBCmd([]stage.Cmd{cmd})}
 	ret, err := e.execClient.Exec(context.TODO(), req)
 	if err != nil {
diff --git a/internal/stage/model.go b/internal/stage/model.go
index 78997b3..3da0242 100644
--- a/internal/stage/model.go
+++ b/internal/stage/model.go
@@ -45,6 +45,7 @@ type Cmd struct {
 
 	CopyIn       map[string]CmdFile `json:"copyIn"`
 	CopyInCached map[string]string  `json:"copyInCached"`
+	CopyInCwd    bool               `json:"copyInCwd"`
 
 	CopyOut       []string `json:"copyOut"`
 	CopyOutCached []string `json:"copyOutCached"`