diff --git a/internal/keyseq/keys.go b/internal/keyseq/keys.go
index 0bdea03..b5562df 100644
--- a/internal/keyseq/keys.go
+++ b/internal/keyseq/keys.go
@@ -244,8 +244,8 @@ func KeyEventToString(key KeyType, ch rune, mod ModifierKey) (string, error) {
 }
 
 // ToKey parses a single key name string into its KeyType, modifier, and rune components.
-func ToKey(key string) (k KeyType, modifier ModifierKey, ch rune, err error) {
-	modifier = ModNone
+func ToKey(key string) (KeyType, ModifierKey, rune, error) {
+	modifier := ModNone
 
 	// Try full string first. This handles legacy key names like "C-a",
 	// "C-v", "Home", "ArrowLeft", etc. that are registered in stringToKey.
@@ -284,7 +284,7 @@ func ToKey(key string) (k KeyType, modifier ModifierKey, ch rune, err error) {
 
 done:
 	// Try as a single rune (handles multi-byte chars like "せ")
-	ch, _ = utf8.DecodeRuneInString(key)
+	ch, _ := utf8.DecodeRuneInString(key)
 	if ch != utf8.RuneError {
 		return 0, modifier, ch, nil
 	}
diff --git a/internal/keyseq/ternary.go b/internal/keyseq/ternary.go
index afe128e..8480666 100644
--- a/internal/keyseq/ternary.go
+++ b/internal/keyseq/ternary.go
@@ -82,7 +82,7 @@ func (n *TernaryNode) Get(k Key) Node {
 }
 
 // Dig finds or creates a child node for the given key, returning the node and whether it was newly created.
-func (n *TernaryNode) Dig(k Key) (node Node, isnew bool) {
+func (n *TernaryNode) Dig(k Key) (Node, bool) {
 	curr := n.firstChild
 	if curr == nil {
 		n.firstChild = NewTernaryNode(k)