diff --git a/aggregator-agent/go.mod b/aggregator-agent/go.mod
index f2a5f96..9a76862 100644
--- a/aggregator-agent/go.mod
+++ b/aggregator-agent/go.mod
@@ -12,6 +12,7 @@ require (
 )
 
 require (
+	github.com/Fimeg/RedFlag/aggregator v0.0.0
 	github.com/Microsoft/go-winio v0.4.21 // indirect
 	github.com/containerd/log v0.1.0 // indirect
 	github.com/distribution/reference v0.6.0 // indirect
@@ -36,3 +37,5 @@ require (
 	golang.org/x/time v0.5.0 // indirect
 	gotest.tools/v3 v3.5.2 // indirect
 )
+
+replace github.com/Fimeg/RedFlag/aggregator => ../aggregator
diff --git a/aggregator-agent/internal/migration/detection.go b/aggregator-agent/internal/migration/detection.go
index aca8dd6..d1b7d6b 100644
--- a/aggregator-agent/internal/migration/detection.go
+++ b/aggregator-agent/internal/migration/detection.go
@@ -9,29 +9,19 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
-)
 
-// AgentFile represents a file associated with the agent
-type AgentFile struct {
-	Path         string    `json:"path"`
-	Size         int64     `json:"size"`
-	ModifiedTime time.Time `json:"modified_time"`
-	Version      string    `json:"version,omitempty"`
-	Checksum     string    `json:"checksum"`
-	Required     bool      `json:"required"`
-	Migrate      bool      `json:"migrate"`
-	Description  string    `json:"description"`
-}
+	"github.com/Fimeg/RedFlag/aggregator/pkg/common"
+)
 
 // AgentFileInventory represents all files associated with an agent installation
 type AgentFileInventory struct {
-	ConfigFiles       []AgentFile `json:"config_files"`
-	StateFiles        []AgentFile `json:"state_files"`
-	BinaryFiles       []AgentFile `json:"binary_files"`
-	LogFiles          []AgentFile `json:"log_files"`
-	CertificateFiles  []AgentFile `json:"certificate_files"`
-	OldDirectoryPaths []string    `json:"old_directory_paths"`
-	NewDirectoryPaths []string    `json:"new_directory_paths"`
+	ConfigFiles       []common.AgentFile `json:"config_files"`
+	StateFiles        []common.AgentFile `json:"state_files"`
+	BinaryFiles       []common.AgentFile `json:"binary_files"`
+	LogFiles          []common.AgentFile `json:"log_files"`
+	CertificateFiles  []common.AgentFile `json:"certificate_files"`
+	OldDirectoryPaths []string           `json:"old_directory_paths"`
+	NewDirectoryPaths []string           `json:"new_directory_paths"`
 }
 
 // MigrationDetection represents the result of migration detection
@@ -184,8 +174,8 @@ func scanAgentFiles(config *FileDetectionConfig) (*AgentFileInventory, error) {
 }
 
 // scanDirectory scans a directory for files matching specific patterns
-func scanDirectory(dirPath string, patterns map[string][]string) ([]AgentFile, error) {
-	var files []AgentFile
+func scanDirectory(dirPath string, patterns map[string][]string) ([]common.AgentFile, error) {
+	var files []common.AgentFile
 
 	err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -203,7 +193,7 @@ func scanDirectory(dirPath string, patterns map[string][]string) ([]AgentFile, e
 			return nil
 		}
 
-		file := AgentFile{
+		file := common.AgentFile{
 			Path:         path,
 			Size:         info.Size(),
 			ModifiedTime: info.ModTime(),
diff --git a/aggregator-agent/internal/migration/docker.go b/aggregator-agent/internal/migration/docker.go
index a35cdd3..e0c7163 100644
--- a/aggregator-agent/internal/migration/docker.go
+++ b/aggregator-agent/internal/migration/docker.go
@@ -14,6 +14,8 @@ import (
 	"runtime"
 	"strings"
 	"time"
+
+	"github.com/Fimeg/RedFlag/aggregator/pkg/common"
 )
 
 // DockerDetection represents Docker secrets detection results
@@ -23,7 +25,7 @@ type DockerDetection struct {
 	RequiredSecrets     []string `json:"required_secrets"`
 	ExistingSecrets     []string `json:"existing_secrets"`
 	MigrateToSecrets    bool     `json:"migrate_to_secrets"`
-	SecretFiles         []AgentFile `json:"secret_files"`
+	SecretFiles         []common.AgentFile `json:"secret_files"`
 	DetectionTime       time.Time `json:"detection_time"`
 }
 
@@ -88,8 +90,8 @@ func DetectDockerSecretsRequirements(config *FileDetectionConfig) (*DockerDetect
 }
 
 // scanSecretFiles scans for files containing sensitive data
-func scanSecretFiles(config *FileDetectionConfig) ([]AgentFile, error) {
-	var secretFiles []AgentFile
+func scanSecretFiles(config *FileDetectionConfig) ([]common.AgentFile, error) {
+	var secretFiles []common.AgentFile
 
 	// Define sensitive file patterns
 	secretPatterns := []string{
@@ -116,8 +118,8 @@ func scanSecretFiles(config *FileDetectionConfig) ([]AgentFile, error) {
 }
 
 // scanSecretDirectory scans a directory for files that may contain secrets
-func scanSecretDirectory(dirPath string, patterns []string) ([]AgentFile, error) {
-	var files []AgentFile
+func scanSecretDirectory(dirPath string, patterns []string) ([]common.AgentFile, error) {
+	var files []common.AgentFile
 
 	err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -146,13 +148,13 @@ func scanSecretDirectory(dirPath string, patterns []string) ([]AgentFile, error)
 }
 
 // addSecretFile adds a file to the secret files list
-func addSecretFile(files *[]AgentFile, path string, info os.FileInfo) error {
+func addSecretFile(files *[]common.AgentFile, path string, info os.FileInfo) error {
 	checksum, err := calculateFileChecksum(path)
 	if err != nil {
 		return nil // Skip files we can't read
 	}
 
-	file := AgentFile{
+	file := common.AgentFile{
 		Path:         path,
 		Size:         info.Size(),
 		ModifiedTime: info.ModTime(),
@@ -228,7 +230,7 @@ func containsString(s, substr string) bool {
 }
 
 // identifyRequiredSecrets identifies which secrets need to be created
-func identifyRequiredSecrets(secretFiles []AgentFile) []string {
+func identifyRequiredSecrets(secretFiles []common.AgentFile) []string {
 	var secrets []string
 	for _, file := range secretFiles {
 		secretName := filepath.Base(file.Path)
diff --git a/aggregator-agent/internal/migration/docker_executor.go b/aggregator-agent/internal/migration/docker_executor.go
index ef85ff6..d41c621 100644
--- a/aggregator-agent/internal/migration/docker_executor.go
+++ b/aggregator-agent/internal/migration/docker_executor.go
@@ -7,6 +7,8 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
+
+	"github.com/Fimeg/RedFlag/aggregator/pkg/common"
 )
 
 // DockerSecretsExecutor handles the execution of Docker secrets migration
@@ -96,7 +98,7 @@ func (e *DockerSecretsExecutor) createSecretsBackup() error {
 }
 
 // migrateSecretFile migrates a single secret file to Docker secrets
-func (e *DockerSecretsExecutor) migrateSecretFile(secretFile AgentFile) error {
+func (e *DockerSecretsExecutor) migrateSecretFile(secretFile common.AgentFile) error {
 	secretName := filepath.Base(secretFile.Path)
 	secretPath := filepath.Join(e.detection.SecretsMountPath, secretName)
 
@@ -120,7 +122,7 @@ func (e *DockerSecretsExecutor) migrateSecretFile(secretFile AgentFile) error {
 }
 
 // migrateConfigFile handles special migration of config.json with encryption
-func (e *DockerSecretsExecutor) migrateConfigFile(secretFile AgentFile) error {
+func (e *DockerSecretsExecutor) migrateConfigFile(secretFile common.AgentFile) error {
 	// Read original config
 	configData, err := os.ReadFile(secretFile.Path)
 	if err != nil {
diff --git a/aggregator-agent/internal/migration/executor.go b/aggregator-agent/internal/migration/executor.go
index 39b4c4f..057b74a 100644
--- a/aggregator-agent/internal/migration/executor.go
+++ b/aggregator-agent/internal/migration/executor.go
@@ -6,6 +6,8 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
+
+	"github.com/Fimeg/RedFlag/aggregator/pkg/common"
 )
 
 // MigrationPlan represents a complete migration plan
@@ -239,8 +241,8 @@ func (e *MigrationExecutor) validateMigration() error {
 
 // Helper methods
 
-func (e *MigrationExecutor) collectAllFiles() []AgentFile {
-	var allFiles []AgentFile
+func (e *MigrationExecutor) collectAllFiles() []common.AgentFile {
+	var allFiles []common.AgentFile
 	allFiles = append(allFiles, e.plan.Detection.Inventory.ConfigFiles...)
 	allFiles = append(allFiles, e.plan.Detection.Inventory.StateFiles...)
 	allFiles = append(allFiles, e.plan.Detection.Inventory.BinaryFiles...)
@@ -249,7 +251,7 @@ func (e *MigrationExecutor) collectAllFiles() []AgentFile {
 	return allFiles
 }
 
-func (e *MigrationExecutor) backupFile(file AgentFile, backupPath string) error {
+func (e *MigrationExecutor) backupFile(file common.AgentFile, backupPath string) error {
 	relPath, err := filepath.Rel(e.plan.Config.OldConfigPath, file.Path)
 	if err != nil {
 		// Try relative to old state path
diff --git a/aggregator-server/go.mod b/aggregator-server/go.mod
index f1dde0f..801b54c 100644
--- a/aggregator-server/go.mod
+++ b/aggregator-server/go.mod
@@ -12,6 +12,7 @@ require (
 )
 
 require (
+	github.com/Fimeg/RedFlag/aggregator v0.0.0
 	github.com/bytedance/sonic v1.14.0 // indirect
 	github.com/bytedance/sonic/loader v0.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect
@@ -43,3 +44,5 @@ require (
 	golang.org/x/tools v0.34.0 // indirect
 	google.golang.org/protobuf v1.36.9 // indirect
 )
+
+replace github.com/Fimeg/RedFlag/aggregator => ../aggregator
diff --git a/aggregator-server/internal/services/build_types.go b/aggregator-server/internal/services/build_types.go
index 70a6020..34dd83f 100644
--- a/aggregator-server/internal/services/build_types.go
+++ b/aggregator-server/internal/services/build_types.go
@@ -10,6 +10,8 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
+
+	"github.com/Fimeg/RedFlag/aggregator/pkg/common"
 )
 
 // NewBuildRequest represents a request for a new agent build
@@ -57,25 +59,13 @@ type InstallationDetection struct {
 
 // AgentFileInventory represents all files associated with an agent installation
 type AgentFileInventory struct {
-	ConfigFiles      []AgentFile `json:"config_files"`
-	StateFiles       []AgentFile `json:"state_files"`
-	BinaryFiles      []AgentFile `json:"binary_files"`
-	LogFiles         []AgentFile `json:"log_files"`
-	CertificateFiles []AgentFile `json:"certificate_files"`
-	ExistingPaths    []string    `json:"existing_paths"`
-	MissingPaths     []string    `json:"missing_paths"`
-}
-
-// AgentFile represents a file associated with the agent
-type AgentFile struct {
-	Path         string `json:"path"`
-	Size         int64  `json:"size"`
-	ModifiedTime string `json:"modified_time"`
-	Version      string `json:"version,omitempty"`
-	Checksum     string `json:"checksum"`
-	Required     bool   `json:"required"`
-	Migrate      bool   `json:"migrate"`
-	Description  string `json:"description"`
+	ConfigFiles      []common.AgentFile `json:"config_files"`
+	StateFiles       []common.AgentFile `json:"state_files"`
+	BinaryFiles      []common.AgentFile `json:"binary_files"`
+	LogFiles         []common.AgentFile `json:"log_files"`
+	CertificateFiles []common.AgentFile `json:"certificate_files"`
+	ExistingPaths    []string           `json:"existing_paths"`
+	MissingPaths     []string           `json:"missing_paths"`
 }
 
 // MigrationDetection represents migration detection results (from existing migration system)
@@ -115,8 +105,8 @@ func (id *InstallationDetector) DetectExistingInstallation(agentID string) (*Ins
 }
 
 // scanDirectory scans a directory for agent-related files
-func (id *InstallationDetector) scanDirectory(dirPath string) ([]AgentFile, error) {
-	var files []AgentFile
+func (id *InstallationDetector) scanDirectory(dirPath string) ([]common.AgentFile, error) {
+	var files []common.AgentFile
 
 	entries, err := os.ReadDir(dirPath)
 	if err != nil {
@@ -143,10 +133,10 @@ func (id *InstallationDetector) scanDirectory(dirPath string) ([]AgentFile, erro
 			checksum = ""
 		}
 
-		file := AgentFile{
+		file := common.AgentFile{
 			Path:         fullPath,
 			Size:         info.Size(),
-			ModifiedTime: info.ModTime().Format(time.RFC3339),
+			ModifiedTime: info.ModTime(),
 			Checksum:     checksum,
 			Required:     id.isRequiredFile(entry.Name()),
 			Migrate:      id.shouldMigrateFile(entry.Name()),
@@ -160,7 +150,7 @@ func (id *InstallationDetector) scanDirectory(dirPath string) ([]AgentFile, erro
 }
 
 // categorizeFile categorizes a file into the appropriate inventory section
-func (id *InstallationDetector) categorizeFile(file AgentFile, inventory *AgentFileInventory) {
+func (id *InstallationDetector) categorizeFile(file common.AgentFile, inventory *AgentFileInventory) {
 	filename := filepath.Base(file.Path)
 
 	switch {
diff --git a/aggregator/go.mod b/aggregator/go.mod
new file mode 100644
index 0000000..c020602
--- /dev/null
+++ b/aggregator/go.mod
@@ -0,0 +1,3 @@
+module github.com/Fimeg/RedFlag/aggregator
+
+go 1.23.0
diff --git a/aggregator/pkg/common/agentfile.go b/aggregator/pkg/common/agentfile.go
new file mode 100644
index 0000000..9f970bd
--- /dev/null
+++ b/aggregator/pkg/common/agentfile.go
@@ -0,0 +1,44 @@
+package common
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"os"
+	"time"
+)
+
+type AgentFile struct {
+	Path         string    `json:"path"`
+	Size         int64     `json:"size"`
+	ModifiedTime time.Time `json:"modified_time"`
+	Version      string    `json:"version,omitempty"`
+	Checksum     string    `json:"checksum"`
+	Required     bool      `json:"required"`
+	Migrate      bool      `json:"migrate"`
+	Description  string    `json:"description"`
+}
+
+// CalculateChecksum computes SHA256 checksum of a file
+func CalculateChecksum(filePath string) (string, error) {
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return "", err
+	}
+	hash := sha256.Sum256(data)
+	return hex.EncodeToString(hash[:]), nil
+}
+
+// IsRequiredFile determines if a file is required for agent operation
+func IsRequiredFile(path string) bool {
+	requiredFiles := []string{
+		"/etc/redflag/config.json",
+		"/usr/local/bin/redflag-agent",
+		"/etc/systemd/system/redflag-agent.service",
+	}
+	for _, rf := range requiredFiles {
+		if path == rf {
+			return true
+		}
+	}
+	return false
+}