diff --git a/pkg/hook/builder.go b/pkg/hook/builder.go
index f4e4d2b0..cafc5c3a 100644
--- a/pkg/hook/builder.go
+++ b/pkg/hook/builder.go
@@ -1,18 +1,16 @@
 package hook
 
-type (
-	// Builder builds a new Hooks.
-	Builder []func(*Hook) error
-)
+// Builder builds a new Hooks.
+type Builder []func(*Hook) error
 
 // NewBuilder returns a new HooksBuilder.
 func NewBuilder(funcs ...func(*Hook) error) Builder {
 	return Builder(funcs)
 }
 
-// AddToHooks adds all registered hook to s.
-func (b *Builder) AddToHooks(h *Hook) error {
-	for _, f := range *b {
+// AddToHooks adds all registered hooks to h.
+func (b Builder) AddToHooks(h *Hook) error {
+	for _, f := range b {
 		if err := f(h); err != nil {
 			return err
 		}
@@ -20,13 +18,13 @@ func (b *Builder) AddToHooks(h *Hook) error {
 	return nil
 }
 
-// Register adds one or more hook.
+// Register adds one or more hooks.
 func (b *Builder) Register(funcs ...func(*Hook) error) {
 	*b = append(*b, funcs...)
 }
 
 // Build returns a new Hooks containing the registered hooks.
-func (b *Builder) Build() (*Hook, error) {
+func (b Builder) Build() (*Hook, error) {
 	h := New()
 	if err := b.AddToHooks(h); err != nil {
 		return nil, err
diff --git a/pkg/hook/hook.go b/pkg/hook/hook.go
index aabf50ea..95b7654e 100644
--- a/pkg/hook/hook.go
+++ b/pkg/hook/hook.go
@@ -7,24 +7,22 @@ import (
 	"github.com/siyul-park/uniflow/pkg/symbol"
 )
 
-type (
-	// Hook is a collection of hook functions.
-	Hook struct {
-		loadHooks   []symbol.LoadHook
-		unloadHooks []symbol.UnloadHook
-		mu          sync.RWMutex
-	}
-)
+// Hook is a collection of hook functions for loading and unloading nodes.
+type Hook struct {
+	loadHooks   []symbol.LoadHook
+	unloadHooks []symbol.UnloadHook
+	mu          sync.RWMutex
+}
 
 var _ symbol.LoadHook = &Hook{}
 var _ symbol.UnloadHook = &Hook{}
 
-// New returns a new Hooks.
+// New creates a new Hook instance.
 func New() *Hook {
 	return &Hook{}
 }
 
-// AddLoadHook adds a LoadHook.
+// AddLoadHook adds a LoadHook function to the Hook.
 func (h *Hook) AddLoadHook(hook symbol.LoadHook) {
 	h.mu.Lock()
 	defer h.mu.Unlock()
@@ -32,7 +30,7 @@ func (h *Hook) AddLoadHook(hook symbol.LoadHook) {
 	h.loadHooks = append(h.loadHooks, hook)
 }
 
-// AddUnloadHook adds a UnloadHook.
+// AddUnloadHook adds an UnloadHook function to the Hook.
 func (h *Hook) AddUnloadHook(hook symbol.UnloadHook) {
 	h.mu.Lock()
 	defer h.mu.Unlock()
@@ -40,7 +38,7 @@ func (h *Hook) AddUnloadHook(hook symbol.UnloadHook) {
 	h.unloadHooks = append(h.unloadHooks, hook)
 }
 
-// Load runs LoadHooks.
+// Load executes LoadHooks on the provided node.
 func (h *Hook) Load(n node.Node) error {
 	h.mu.RLock()
 	defer h.mu.RUnlock()
@@ -53,7 +51,7 @@ func (h *Hook) Load(n node.Node) error {
 	return nil
 }
 
-// Unload runs UnloadHooks.
+// Unload executes UnloadHooks on the provided node.
 func (h *Hook) Unload(n node.Node) error {
 	h.mu.RLock()
 	defer h.mu.RUnlock()