diff --git "a/examples/\345\217\214\346\240\270\345\277\203\351\233\206\346\210\220\347\244\272\344\276\213.go" "b/examples/\345\217\214\346\240\270\345\277\203\351\233\206\346\210\220\347\244\272\344\276\213.go"
index aee62937..504e12ca 100644
--- "a/examples/\345\217\214\346\240\270\345\277\203\351\233\206\346\210\220\347\244\272\344\276\213.go"
+++ "b/examples/\345\217\214\346\240\270\345\277\203\351\233\206\346\210\220\347\244\272\344\276\213.go"
@@ -99,7 +99,7 @@ func exampleAsyncResult() {
 		WorkerCount: 4,
 	}
 
-	persistCfg := persist.Config{
+	persistCfg := config.PersistConfig{
 		Enabled:   true,
 		Directory: "data/state",
 		File:      "server-state.json",
@@ -144,7 +144,7 @@ func exampleMonitorCore2() {
 		WorkerCount: 4,
 	}
 
-	persistCfg := persist.Config{
+	persistCfg := config.PersistConfig{
 		Enabled:   true,
 		Directory: "data/state",
 		File:      "server-state.json",
@@ -198,7 +198,7 @@ func exampleIntegration() {
 		WorkerCount: 4,
 	}
 
-	persistCfg := persist.Config{
+	persistCfg := config.PersistConfig{
 		Enabled:     true,
 		Directory:   "data/state",
 		File:        "server-state.json",
diff --git a/internal/logic/lexer.go b/internal/logic/lexer.go
index f1dbf705..7c4ec2c9 100644
--- a/internal/logic/lexer.go
+++ b/internal/logic/lexer.go
@@ -231,7 +231,7 @@ func (t Token) String() string {
 	case True, False:
 		return fmt.Sprintf("BOOL(%s)", t.Literal)
 	default:
-		return fmt.Sprintf("%s(%s)", t.Type, t.Literal)
+		return fmt.Sprintf("%v(%s)", t.Type, t.Literal)
 	}
 }
 
diff --git a/internal/logic/parser.go b/internal/logic/parser.go
index ee618d78..cb14a7ee 100644
--- a/internal/logic/parser.go
+++ b/internal/logic/parser.go
@@ -181,7 +181,7 @@ func (e *BinaryExpr) nodeType() string {
 
 // String returns a string representation of the binary expression.
 func (e *BinaryExpr) String() string {
-	return fmt.Sprintf("(%s %s %s)", e.Left, e.Operator, e.Right)
+	return fmt.Sprintf("(%s %v %s)", e.Left, e.Operator, e.Right)
 }
 
 // UnaryExpr represents a unary operation.
@@ -201,7 +201,7 @@ func (e *UnaryExpr) nodeType() string {
 
 // String returns a string representation of the unary expression.
 func (e *UnaryExpr) String() string {
-	return fmt.Sprintf("%s%s", e.Operator, e.Operand)
+	return fmt.Sprintf("%v%s", e.Operator, e.Operand)
 }
 
 // CallExpr represents a function call.
diff --git a/internal/mods/loader.go b/internal/mods/loader.go
index a8d4d6f9..de58c805 100644
--- a/internal/mods/loader.go
+++ b/internal/mods/loader.go
@@ -3,11 +3,11 @@ package mods
 import (
 	"encoding/json"
 	"fmt"
-	"os"
 	"path/filepath"
+	"strings"
 
 	"mdt-server/internal/config"
-	"mdt-server/internal/mods/go"
+	gomod "mdt-server/internal/mods/go"
 	"mdt-server/internal/mods/java"
 	"mdt-server/internal/mods/js"
 	"mdt-server/internal/mods/node"
@@ -53,7 +53,7 @@ func (ml *ModLoader) Load(path string) error {
 	}
 
 	// Check mod type and load accordingly
-	ext := filepath.Ext(path)
+	ext := strings.ToLower(filepath.Ext(path))
 	switch ext {
 	case ".jar":
 		manager, exists := ml.managers["java"]
@@ -89,7 +89,7 @@ func (ml *ModLoader) Load(path string) error {
 	case ".go":
 		manager, exists := ml.managers["go"]
 		if !exists {
-			manager = go.NewGoModManager()
+			manager = gomod.NewGoModManager()
 			ml.managers["go"] = manager
 		}
 
@@ -101,6 +101,21 @@ func (ml *ModLoader) Load(path string) error {
 		ml.loadedMods[mod.Name] = mod
 		return nil
 
+	case ".node":
+		manager, exists := ml.managers["node"]
+		if !exists {
+			manager = node.NewNodeModManager()
+			ml.managers["node"] = manager
+		}
+
+		mod := &LoadedMod{
+			Name:     filepath.Base(path),
+			Path:     path,
+			DataType: "node",
+		}
+		ml.loadedMods[mod.Name] = mod
+		return nil
+
 	default:
 		return fmt.Errorf("mod loader: mod type not supported: %s", ext)
 	}
@@ -108,7 +123,7 @@ func (ml *ModLoader) Load(path string) error {
 
 // Unload unloads a mod by name
 func (ml *ModLoader) Unload(name string) error {
-	if mod, exists := ml.loadedMods[name]; exists {
+	if _, exists := ml.loadedMods[name]; exists {
 		delete(ml.loadedMods, name)
 		return nil
 	}
@@ -180,30 +195,30 @@ func (ml *ModLoader) SetConfig(cfg config.ModsConfig) {
 // MarshalJSON implements json.Marshaler
 func (ml *ModLoader) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
-		Enabled      bool
-		LoadedMods   []string
-		JavaHome     string
-		JSDir        string
-		GoDir        string
-		NodeDir      string
+		Enabled    bool
+		LoadedMods []string
+		JavaHome   string
+		JSDir      string
+		GoDir      string
+		NodeDir    string
 	}{
-		Enabled:      ml.cfg.Enabled,
-		LoadedMods:   ml.ListMods(),
-		JavaHome:     ml.cfg.JavaHome,
-		JSDir:        ml.cfg.JSDir,
-		GoDir:        ml.cfg.GoDir,
-		NodeDir:      ml.cfg.NodeDir,
+		Enabled:    ml.cfg.Enabled,
+		LoadedMods: ml.ListMods(),
+		JavaHome:   ml.cfg.JavaHome,
+		JSDir:      ml.cfg.JSDir,
+		GoDir:      ml.cfg.GoDir,
+		NodeDir:    ml.cfg.NodeDir,
 	})
 }
 
 // UnmarshalJSON implements json.Unmarshaler
 func (ml *ModLoader) UnmarshalJSON(data []byte) error {
 	var cfg struct {
-		Enabled      bool   `json:"enabled"`
-		JavaHome     string `json:"java_home"`
-		JSDir        string `json:"js_dir"`
-		GoDir        string `json:"go_dir"`
-		NodeDir      string `json:"node_dir"`
+		Enabled  bool   `json:"enabled"`
+		JavaHome string `json:"java_home"`
+		JSDir    string `json:"js_dir"`
+		GoDir    string `json:"go_dir"`
+		NodeDir  string `json:"node_dir"`
 	}
 	if err := json.Unmarshal(data, &cfg); err != nil {
 		return err
diff --git a/internal/mods/loader_test.go b/internal/mods/loader_test.go
new file mode 100644
index 00000000..238149a5
--- /dev/null
+++ b/internal/mods/loader_test.go
@@ -0,0 +1,54 @@
+package mods
+
+import "testing"
+
+func TestModLoaderLoadTypes(t *testing.T) {
+	ml := NewModLoader()
+	ml.SetEnabled(true)
+
+	cases := []struct {
+		path string
+		typ  string
+	}{
+		{path: "mods/A.jar", typ: "java"},
+		{path: "mods/b.js", typ: "js"},
+		{path: "mods/c.go", typ: "go"},
+		{path: "mods/d.node", typ: "node"},
+		{path: "mods/E.NODE", typ: "node"},
+	}
+
+	for _, tc := range cases {
+		if err := ml.Load(tc.path); err != nil {
+			t.Fatalf("load %s failed: %v", tc.path, err)
+		}
+		mod, err := ml.GetMod(lastPathBase(tc.path))
+		if err != nil {
+			t.Fatalf("get mod %s failed: %v", tc.path, err)
+		}
+		if mod.DataType != tc.typ {
+			t.Fatalf("expected type %s for %s, got %s", tc.typ, tc.path, mod.DataType)
+		}
+	}
+}
+
+func TestModLoaderDisabledAndUnsupported(t *testing.T) {
+	ml := NewModLoader()
+
+	if err := ml.Load("mods/x.js"); err == nil {
+		t.Fatalf("expected error when mods disabled")
+	}
+
+	ml.SetEnabled(true)
+	if err := ml.Load("mods/x.txt"); err == nil {
+		t.Fatalf("expected unsupported type error")
+	}
+}
+
+func lastPathBase(p string) string {
+	for i := len(p) - 1; i >= 0; i-- {
+		if p[i] == '/' || p[i] == '\\' {
+			return p[i+1:]
+		}
+	}
+	return p
+}
diff --git a/internal/mods/manager.go b/internal/mods/manager.go
index c2d9a5b8..599ef233 100644
--- a/internal/mods/manager.go
+++ b/internal/mods/manager.go
@@ -5,14 +5,8 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"sort"
 	"strings"
 	"sync"
-
-	"mdt-server/internal/mods/go"
-	"mdt-server/internal/mods/java"
-	"mdt-server/internal/mods/js"
-	"mdt-server/internal/mods/node"
 )
 
 // ====================
@@ -138,10 +132,12 @@ func (m *ModManager) LoadAll() error {
 	// load each mod
 	for _, path := range modFiles {
 		if err := m.loader.Load(path); err != nil {
-			Log.Warn("failed to load mod: %s (%v)", path, err)
+			modLog.Warn("failed to load mod: %s (%v)", path, err)
 		}
 	}
 
+	m.mods = m.collectLoadedModsLocked()
+
 	return nil
 }
 
@@ -154,9 +150,10 @@ func (m *ModManager) UnloadAll() error {
 	for _, mod := range m.mods {
 		if err := m.loader.Unload(mod.Name); err != nil {
 			errors = append(errors, err)
-			Log.Warn("failed to unload mod: %s (%v)", mod.Name, err)
+			modLog.Warn("failed to unload mod: %s (%v)", mod.Name, err)
 		}
 	}
+	m.mods = m.mods[:0]
 
 	if len(errors) > 0 {
 		return fmt.Errorf("failed to unload some mods: %v", errors)
@@ -179,13 +176,9 @@ func (m *ModManager) StartAll() error {
 	defer m.mu.Unlock()
 
 	var errors []error
-	for _, mod := range m.mods {
-		if !mod.Started {
-			if err := mod.Start(); err != nil {
-				errors = append(errors, err)
-				Log.Warn("failed to start mod: %s (%v)", mod.Name, err)
-			}
-		}
+	if err := m.loader.Start(); err != nil {
+		errors = append(errors, err)
+		modLog.Warn("failed to start mods: %v", err)
 	}
 
 	if len(errors) > 0 {
@@ -201,13 +194,9 @@ func (m *ModManager) StopAll() error {
 	defer m.mu.Unlock()
 
 	var errors []error
-	for _, mod := range m.mods {
-		if mod.Started {
-			if err := mod.Stop(); err != nil {
-				errors = append(errors, err)
-				Log.Warn("failed to stop mod: %s (%v)", mod.Name, err)
-			}
-		}
+	if err := m.loader.Stop(); err != nil {
+		errors = append(errors, err)
+		modLog.Warn("failed to stop mods: %v", err)
 	}
 
 	if len(errors) > 0 {
@@ -276,3 +265,15 @@ func (m *ModManager) GetProperty(key string) (interface{}, error) {
 func (m *ModManager) GetLoader() *ModLoader {
 	return m.loader
 }
+
+func (m *ModManager) collectLoadedModsLocked() []*LoadedMod {
+	names := m.loader.ListMods()
+	mods := make([]*LoadedMod, 0, len(names))
+	for _, name := range names {
+		mod, err := m.loader.GetMod(name)
+		if err == nil {
+			mods = append(mods, mod)
+		}
+	}
+	return mods
+}
diff --git a/internal/mods/types.go b/internal/mods/types.go
index 833374fb..314da808 100644
--- a/internal/mods/types.go
+++ b/internal/mods/types.go
@@ -23,6 +23,8 @@ type Log interface {
 // simpleLogger simple logger
 type simpleLogger struct{}
 
+var modLog Log = &simpleLogger{}
+
 func (l *simpleLogger) Info(msg string, args ...interface{}) {
 	fmt.Printf("[MOD] "+msg+"\n", args...)
 }
diff --git a/internal/render/render.go b/internal/render/render.go
index c0f1f998..e68ce888 100644
--- a/internal/render/render.go
+++ b/internal/render/render.go
@@ -264,9 +264,9 @@ func GetTeamColor(team world.TeamID) Color {
 		{R: 0.95, G: 0.56, B: 0.12, A: 1.0}, // rime
 	}
 	// Ensure teamIdx is non-negative and within bounds
-	teamIdx := int(team) % int32(len(colors))
+	teamIdx := int(team) % len(colors)
 	if teamIdx < 0 {
-		teamIdx += int32(len(colors))
+		teamIdx += len(colors)
 	}
 	return colors[teamIdx]
 }