diff --git a/kpm.go b/kpm.go
index fbafb996..46227da4 100644
--- a/kpm.go
+++ b/kpm.go
@@ -3,6 +3,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/urfave/cli/v2"
@@ -16,7 +17,7 @@ func main() {
 	reporter.InitReporter()
 	kpmcli, err := client.NewKpmClient()
 	if err != nil {
-		reporter.Fatal(err)
+		kpmcli.WriteLog(fmt.Sprintf("Error: %v", err))
 	}
 	app := cli.NewApp()
 	app.Name = "kpm"
diff --git a/pkg/checker/scripts/registry_auth/htpasswd b/pkg/checker/scripts/registry_auth/htpasswd
new file mode 100644
index 00000000..e69de29b
diff --git a/pkg/client/client.go b/pkg/client/client.go
index 9f64c494..421072a1 100644
--- a/pkg/client/client.go
+++ b/pkg/client/client.go
@@ -1,9 +1,11 @@
 package client
 
 import (
+	"fmt"
 	"io"
 	"os"
 	"path/filepath"
+	"strings"
 
 	remoteauth "oras.land/oras-go/v2/registry/remote/auth"
 
@@ -11,6 +13,7 @@ import (
 	"kcl-lang.io/kpm/pkg/constants"
 	"kcl-lang.io/kpm/pkg/downloader"
 	"kcl-lang.io/kpm/pkg/env"
+	"kcl-lang.io/kpm/pkg/logger"
 	pkg "kcl-lang.io/kpm/pkg/package"
 	"kcl-lang.io/kpm/pkg/reporter"
 	"kcl-lang.io/kpm/pkg/settings"
@@ -57,7 +60,7 @@ func NewKpmClient() (*KpmClient, error) {
 	)
 
 	return &KpmClient{
-		logWriter:     os.Stdout,
+		logWriter:     logger.NewLogWriter(),
 		settings:      *settings,
 		homePath:      homePath,
 		ModChecker:    ModChecker,
@@ -65,6 +68,15 @@ func NewKpmClient() (*KpmClient, error) {
 	}, nil
 }
 
+// WriteLog writes a log message
+func (c *KpmClient) WriteLog(message string) {
+	if strings.Contains(message, "[FATAL]") {
+		fmt.Fprintln(c.logWriter, message)
+		os.Exit(1) // Exit the program
+	}
+	c.logWriter.Write([]byte(message + "\n"))
+}
+
 // SetInsecureSkipTLSverify will set the flag of whether to skip the verification of TLS.
 func (c *KpmClient) SetInsecureSkipTLSverify(insecureSkipTLSverify bool) {
 	c.insecureSkipTLSverify = insecureSkipTLSverify
diff --git a/pkg/client/test_data/issues/github.com/kcl-lang/kcl/issues/1760/a/kcl.mod.lock b/pkg/client/test_data/issues/github.com/kcl-lang/kcl/issues/1760/a/kcl.mod.lock
index 252a3083..6a6d847e 100644
--- a/pkg/client/test_data/issues/github.com/kcl-lang/kcl/issues/1760/a/kcl.mod.lock
+++ b/pkg/client/test_data/issues/github.com/kcl-lang/kcl/issues/1760/a/kcl.mod.lock
@@ -19,3 +19,11 @@
     reg = "ghcr.io"
     repo = "kcl-lang/fluxcd-source-controller"
     oci_tag = "v1.3.2"
+  [dependencies.k8s]
+    name = "k8s"
+    full_name = "k8s_1.31.2"
+    version = "1.31.2"
+    sum = "xBZgPsnpVVyWBpahuPQHReeRx28eUHGFoaPeqbct+vs="
+    reg = "ghcr.io"
+    repo = "kcl-lang/k8s"
+    oci_tag = "1.31.2"
diff --git a/pkg/client/test_data/resolve_metadata/with_package/kcl.mod.lock b/pkg/client/test_data/resolve_metadata/with_package/kcl.mod.lock
index 32355765..2d3841c0 100644
--- a/pkg/client/test_data/resolve_metadata/with_package/kcl.mod.lock
+++ b/pkg/client/test_data/resolve_metadata/with_package/kcl.mod.lock
@@ -1,7 +1,7 @@
 [dependencies]
   [dependencies.cc]
     name = "cc"
-    full_name = "flask-demo-kcl-manifests_8308200"
+    full_name = "cc_0.0.1"
     version = "0.0.1"
     url = "https://github.com/kcl-lang/flask-demo-kcl-manifests.git"
     commit = "8308200"
diff --git a/pkg/client/test_data/test_dep_order/kcl.mod.lock b/pkg/client/test_data/test_dep_order/kcl.mod.lock
index c7247002..fac2726b 100644
--- a/pkg/client/test_data/test_dep_order/kcl.mod.lock
+++ b/pkg/client/test_data/test_dep_order/kcl.mod.lock
@@ -3,6 +3,7 @@
     name = "helloworld"
     full_name = "helloworld_0.1.2"
     version = "0.1.2"
+    sum = "PN0OMEV9M8VGFn1CtA/T3bcgZmMJmOo+RkBrLKIWYeQ="
     reg = "ghcr.io"
     repo = "kcl-lang/helloworld"
     oci_tag = "0.1.2"
@@ -10,6 +11,7 @@
     name = "jsonpatch"
     full_name = "jsonpatch_0.0.5"
     version = "0.0.5"
+    sum = "HFrflv3tfgcx+CkCj4Pl7EIXjr+SKH8c+hRI4/A3ThA="
     reg = "ghcr.io"
     repo = "kcl-lang/jsonpatch"
     oci_tag = "0.0.5"
diff --git a/pkg/client/test_data/test_mod_file_package/test_pkg/kcl.mod b/pkg/client/test_data/test_mod_file_package/test_pkg/kcl.mod
deleted file mode 100644
index 921ea2db..00000000
--- a/pkg/client/test_data/test_mod_file_package/test_pkg/kcl.mod
+++ /dev/null
@@ -1,7 +0,0 @@
-[package]
-name = "test_pkg"
-edition = "v0.11.0"
-version = "0.0.1"
-
-[dependencies]
-cc = { git = "https://github.com/kcl-lang/flask-demo-kcl-manifests.git", commit = "8308200", package = "cc" }
diff --git a/pkg/client/test_data/test_mod_file_package/test_pkg/kcl.mod.lock b/pkg/client/test_data/test_mod_file_package/test_pkg/kcl.mod.lock
deleted file mode 100644
index 32355765..00000000
--- a/pkg/client/test_data/test_mod_file_package/test_pkg/kcl.mod.lock
+++ /dev/null
@@ -1,8 +0,0 @@
-[dependencies]
-  [dependencies.cc]
-    name = "cc"
-    full_name = "flask-demo-kcl-manifests_8308200"
-    version = "0.0.1"
-    url = "https://github.com/kcl-lang/flask-demo-kcl-manifests.git"
-    commit = "8308200"
-    package = "cc"
diff --git a/pkg/event/event.go b/pkg/event/event.go
new file mode 100644
index 00000000..496512ad
--- /dev/null
+++ b/pkg/event/event.go
@@ -0,0 +1,18 @@
+package event
+
+import "kcl-lang.io/kpm/pkg/client"
+
+// KpmEvent handles diagnostic events.
+type KpmEvent struct {
+	client *client.KpmClient
+}
+
+// NewKpmEvent creates a new KpmEvent.
+func NewKpmEvent(client *client.KpmClient) *KpmEvent {
+	return &KpmEvent{client: client}
+}
+
+// Log writes a diagnostic message.
+func (e *KpmEvent) Log(message string) {
+	e.client.WriteLog(message)
+}
diff --git a/pkg/logger/logwriter.go b/pkg/logger/logwriter.go
new file mode 100644
index 00000000..f96f4d8b
--- /dev/null
+++ b/pkg/logger/logwriter.go
@@ -0,0 +1,38 @@
+package logger
+
+import (
+	"fmt"
+	"os"
+)
+
+// LogWriter is a custom log writer with log level control.
+type LogWriter struct {
+	Level LogLevel
+}
+
+// LogLevel represents the log level.
+type LogLevel string
+
+const (
+	InfoLevel  LogLevel = "info"
+	DebugLevel LogLevel = "debug"
+)
+
+// NewLogWriter creates a new LogWriter with the given level.
+func NewLogWriter() *LogWriter {
+	level := os.Getenv("KPM_LOG_LEVEL")
+	if level == "" {
+		level = string(InfoLevel)
+	}
+	return &LogWriter{Level: LogLevel(level)}
+}
+
+// Write implements the io.Writer interface.
+func (lw *LogWriter) Write(p []byte) (n int, err error) {
+	if lw.Level == DebugLevel {
+		fmt.Fprintf(os.Stdout, "[DEBUG] %s", string(p))
+	} else {
+		fmt.Fprintf(os.Stdout, "[INFO] %s", string(p))
+	}
+	return len(p), nil
+}
diff --git a/pkg/logger/logwriter_test.go b/pkg/logger/logwriter_test.go
new file mode 100644
index 00000000..96c08b5b
--- /dev/null
+++ b/pkg/logger/logwriter_test.go
@@ -0,0 +1,28 @@
+package logger
+
+import (
+	"os"
+	"testing"
+)
+
+func TestLogWriterInfo(t *testing.T) {
+	os.Setenv("KPM_LOG_LEVEL", "info")
+	writer := NewLogWriter()
+
+	message := "Test Info Message"
+	n, err := writer.Write([]byte(message))
+	if err != nil || n != len(message) {
+		t.Errorf("expected %d bytes written, got %d, error: %v", len(message), n, err)
+	}
+}
+
+func TestLogWriterDebug(t *testing.T) {
+	os.Setenv("KPM_LOG_LEVEL", "debug")
+	writer := NewLogWriter()
+
+	message := "Test Debug Message"
+	n, err := writer.Write([]byte(message))
+	if err != nil || n != len(message) {
+		t.Errorf("expected %d bytes written, got %d, error: %v", len(message), n, err)
+	}
+}