diff --git a/README.md b/README.md
index 0a23357..88fc15e 100644
--- a/README.md
+++ b/README.md
@@ -806,34 +806,34 @@ For now, styles of following 7 items can be customized in `config.json`.
 
 ### Foreground Colors
 
-- `"black"` for `termbox.ColorBlack`
-- `"red"` for `termbox.ColorRed`
-- `"green"` for `termbox.ColorGreen`
-- `"yellow"` for `termbox.ColorYellow`
-- `"blue"` for `termbox.ColorBlue`
-- `"magenta"` for `termbox.ColorMagenta`
-- `"cyan"` for `termbox.ColorCyan`
-- `"white"` for `termbox.ColorWhite`
+- `"black"` for `tcell.ColorBlack`
+- `"red"` for `tcell.ColorRed`
+- `"green"` for `tcell.ColorGreen`
+- `"yellow"` for `tcell.ColorYellow`
+- `"blue"` for `tcell.ColorBlue`
+- `"magenta"` for `tcell.ColorMagenta`
+- `"cyan"` for `tcell.ColorCyan`
+- `"white"` for `tcell.ColorWhite`
 - `"0"`-`"255"` for 256color ([Use256Color](#use256color) must be enabled)
 
 ### Background Colors
 
-- `"on_black"` for `termbox.ColorBlack`
-- `"on_red"` for `termbox.ColorRed`
-- `"on_green"` for `termbox.ColorGreen`
-- `"on_yellow"` for `termbox.ColorYellow`
-- `"on_blue"` for `termbox.ColorBlue`
-- `"on_magenta"` for `termbox.ColorMagenta`
-- `"on_cyan"` for `termbox.ColorCyan`
-- `"on_white"` for `termbox.ColorWhite`
+- `"on_black"` for `tcell.ColorBlack`
+- `"on_red"` for `tcell.ColorRed`
+- `"on_green"` for `tcell.ColorGreen`
+- `"on_yellow"` for `tcell.ColorYellow`
+- `"on_blue"` for `tcell.ColorBlue`
+- `"on_magenta"` for `tcell.ColorMagenta`
+- `"on_cyan"` for `tcell.ColorCyan`
+- `"on_white"` for `tcell.ColorWhite`
 - `"on_0"`-`"on_255"` for 256color ([Use256Color](#use256color) must be enabled)
 
 ### Attributes
 
-- `"bold"` for fg: `termbox.AttrBold`
-- `"underline"` for fg: `termbox.AttrUnderline`
-- `"reverse"` for fg: `termbox.AttrReverse`
-- `"on_bold"` for bg: `termbox.AttrBold` (this attribute actually makes the background blink on some platforms/environments, e.g. linux console, xterm...)
+- `"bold"` for fg: `tcell.AttrBold`
+- `"underline"` for fg: `tcell.AttrUnderline`
+- `"reverse"` for fg: `tcell.AttrReverse`
+- `"on_bold"` for bg: `tcell.AttrBold` (this attribute actually makes the background blink on some platforms/environments, e.g. linux console, xterm...)
 
 ## CustomFilter
 
diff --git a/event.go b/event.go
index c18c7e5..fc9cb53 100644
--- a/event.go
+++ b/event.go
@@ -14,9 +14,7 @@ const (
 	EventError
 )
 
-// Event is peco's internal event type, replacing termbox.Event.
-// This decouples all code outside the screen adapter from the
-// terminal library.
+// Event is peco's internal event type, decoupled from any terminal library.
 type Event struct {
 	Type EventType
 	Key  keyseq.KeyType
diff --git a/input.go b/input.go
index bdfd10a..61452fd 100644
--- a/input.go
+++ b/input.go
@@ -49,7 +49,7 @@ func (i *Input) handleInputEvent(ctx context.Context, ev Event) error {
 		return nil
 	case EventKey:
 		// ModAlt is a sequence of letters with a leading \x1b (=Esc).
-		// It would be nice if termbox differentiated this for us, but
+		// The terminal library doesn't differentiate this for us, so
 		// we workaround it by waiting (juuuust a few milliseconds) for
 		// extra key events. If no extra events arrive, it should be Esc
 
diff --git a/internal/keyseq/keys.go b/internal/keyseq/keys.go
index a0127e3..29d4ab3 100644
--- a/internal/keyseq/keys.go
+++ b/internal/keyseq/keys.go
@@ -6,10 +6,8 @@ import (
 	"unicode/utf8"
 )
 
-// KeyType represents a keyboard key. Values are defined to match termbox-go's
-// constants so that the adapter layer in screen.go can do simple type casts
-// during Phase 1 of the migration. In Phase 2, the adapter will map between
-// peco's KeyType and tcell's key constants.
+// KeyType represents a keyboard key. The adapter layer in screen.go maps
+// between peco's KeyType and tcell's key constants.
 type KeyType uint16
 
 // Function keys
@@ -39,8 +37,8 @@ const (
 )
 
 // Mouse keys.
-// In termbox-go there is one internal gap constant between KeyArrowRight
-// and MouseLeft, so MouseLeft = KeyArrowRight - 2 (not -1).
+// There is an intentional gap between KeyArrowRight and MouseLeft
+// (MouseLeft = KeyArrowRight - 2, not -1) for historical reasons.
 const (
 	MouseLeft   KeyType = 0xFFFF - iota - 23 // KeyArrowRight - 2
 	MouseMiddle                              // KeyArrowRight - 3
@@ -211,8 +209,7 @@ func ToKeyList(ksk string) (KeyList, error) {
 }
 
 // KeyEventToString returns a human-readable name for a key event described
-// by the given key type, character, and modifier. This replaces the old
-// EventToString that took a termbox.Event directly.
+// by the given key type, character, and modifier.
 func KeyEventToString(key KeyType, ch rune, mod ModifierKey) (string, error) {
 	s := ""
 	if key == 0 {
diff --git a/layout.go b/layout.go
index d1ed1a9..6bcc71f 100644
--- a/layout.go
+++ b/layout.go
@@ -145,7 +145,7 @@ func (u UserPrompt) Draw(state *Peco) {
 	fg := u.styles.Query.fg
 	bg := u.styles.Query.bg
 
-	// Used to notify termbox where our cursor is
+	// Used to notify the screen where our cursor is
 	var posX int
 
 	switch ql {
diff --git a/peco.go b/peco.go
index 3cb1089..d37f3d3 100644
--- a/peco.go
+++ b/peco.go
@@ -118,7 +118,7 @@ func New() *Peco {
 		idgen:             newIDGen(),
 		queryExecDelay:    50 * time.Millisecond,
 		readyCh:           make(chan struct{}),
-		screen:            NewTermbox(),
+		screen:            NewTcellScreen(),
 		selection:         NewSelection(),
 		maxScanBufferSize: bufio.MaxScanTokenSize,
 	}
@@ -425,7 +425,7 @@ func (p *Peco) Run(ctx context.Context) (err error) {
 	}
 	p.source = src
 
-	// If --height is specified, use InlineScreen instead of the default Termbox screen
+	// If --height is specified, use InlineScreen instead of the default TcellScreen
 	if p.heightSpec != nil {
 		p.screen = NewInlineScreen(*p.heightSpec)
 	}
diff --git a/screen.go b/screen.go
index 4b001d8..41d6afa 100644
--- a/screen.go
+++ b/screen.go
@@ -13,9 +13,8 @@ import (
 	"github.com/peco/peco/internal/keyseq"
 )
 
-// Termbox implements the Screen interface using tcell/v2.
-// The name is kept for compatibility with the rest of the codebase.
-type Termbox struct {
+// TcellScreen implements the Screen interface using tcell/v2.
+type TcellScreen struct {
 	mutex     sync.Mutex
 	screen    tcell.Screen
 	resumeCh  chan chan struct{}
@@ -76,7 +75,7 @@ func tcellEventToEvent(tev tcell.Event) Event {
 		if key == tcell.KeyRune {
 			r := ev.Rune()
 			// Special case: space must be sent as KeySpace with Ch=0
-			// to match termbox behavior expected by doAcceptChar
+			// to match the convention expected by doAcceptChar
 			if r == ' ' {
 				return Event{
 					Type: EventKey,
@@ -159,7 +158,7 @@ func attributeToTcellStyle(fg, bg Attribute) tcell.Style {
 	return style
 }
 
-func (t *Termbox) Init(cfg *Config) error {
+func (t *TcellScreen) Init(cfg *Config) error {
 	screen, err := tcell.NewScreen()
 	if err != nil {
 		return fmt.Errorf("failed to create tcell screen: %w", err)
@@ -173,8 +172,8 @@ func (t *Termbox) Init(cfg *Config) error {
 	return t.PostInit(cfg)
 }
 
-func NewTermbox() *Termbox {
-	return &Termbox{
+func NewTcellScreen() *TcellScreen {
+	return &TcellScreen{
 		suspendCh: make(chan struct{}),
 		resumeCh:  make(chan chan struct{}),
 		doneCh:    make(chan struct{}),
@@ -184,7 +183,7 @@ func NewTermbox() *Termbox {
 // finiScreen finalizes the tcell screen without signaling a permanent
 // shutdown. Used by the suspend handler so the goroutine continues
 // to listen for further suspend/resume cycles.
-func (t *Termbox) finiScreen() {
+func (t *TcellScreen) finiScreen() {
 	t.mutex.Lock()
 	s := t.screen
 	t.screen = nil
@@ -197,16 +196,16 @@ func (t *Termbox) finiScreen() {
 
 // Close permanently shuts down the screen and signals all goroutines
 // started by PollEvent to exit.
-func (t *Termbox) Close() error {
+func (t *TcellScreen) Close() error {
 	if pdebug.Enabled {
-		pdebug.Printf("Termbox: Close")
+		pdebug.Printf("TcellScreen: Close")
 	}
 	t.finiScreen()
 	t.closeOnce.Do(func() { close(t.doneCh) })
 	return nil
 }
 
-func (t *Termbox) SetCursor(x, y int) {
+func (t *TcellScreen) SetCursor(x, y int) {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
 	if t.screen == nil {
@@ -218,12 +217,12 @@ func (t *Termbox) SetCursor(x, y int) {
 // SendEvent is used to allow programmers generate random
 // events, but it's only useful for testing purposes.
 // When interacting with tcell, this method is a noop
-func (t *Termbox) SendEvent(_ Event) {
+func (t *TcellScreen) SendEvent(_ Event) {
 	// no op
 }
 
 // Flush calls tcell's Show to synchronize the screen
-func (t *Termbox) Flush() error {
+func (t *TcellScreen) Flush() error {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
 	if t.screen == nil {
@@ -236,7 +235,7 @@ func (t *Termbox) Flush() error {
 // Sync forces a complete redraw of every cell on the physical display.
 // This recovers from screen corruption caused by external output (e.g.,
 // STDERR messages written directly to the terminal).
-func (t *Termbox) Sync() {
+func (t *TcellScreen) Sync() {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
 	if t.screen == nil {
@@ -248,7 +247,7 @@ func (t *Termbox) Sync() {
 // PollEvent returns a channel that you can listen to for
 // terminal events. The actual polling is done in a
 // separate goroutine
-func (t *Termbox) PollEvent(ctx context.Context, cfg *Config) chan Event {
+func (t *TcellScreen) PollEvent(ctx context.Context, cfg *Config) chan Event {
 	evCh := make(chan Event)
 
 	go func() {
@@ -313,14 +312,14 @@ func (t *Termbox) PollEvent(ctx context.Context, cfg *Config) chan Event {
 	return evCh
 }
 
-func (t *Termbox) Suspend() {
+func (t *TcellScreen) Suspend() {
 	select {
 	case t.suspendCh <- struct{}{}:
 	default:
 	}
 }
 
-func (t *Termbox) Resume(ctx context.Context) {
+func (t *TcellScreen) Resume(ctx context.Context) {
 	// Resume must be a block operation, because we can't safely proceed
 	// without actually knowing that the screen has been re-initialized.
 	// So we send a channel where we expect a reply back, and wait for that.
@@ -343,7 +342,7 @@ func (t *Termbox) Resume(ctx context.Context) {
 }
 
 // SetCell writes to the terminal
-func (t *Termbox) SetCell(x, y int, ch rune, fg, bg Attribute) {
+func (t *TcellScreen) SetCell(x, y int, ch rune, fg, bg Attribute) {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
 	if t.screen == nil {
@@ -354,7 +353,7 @@ func (t *Termbox) SetCell(x, y int, ch rune, fg, bg Attribute) {
 }
 
 // Size returns the dimensions of the current terminal
-func (t *Termbox) Size() (int, int) {
+func (t *TcellScreen) Size() (int, int) {
 	t.mutex.Lock()
 	defer t.mutex.Unlock()
 	if t.screen == nil {
@@ -374,7 +373,7 @@ type PrintArgs struct {
 	ANSIAttrs []ansi.AttrSpan // per-character ANSI attributes for this segment
 }
 
-func (t *Termbox) Print(args PrintArgs) int {
+func (t *TcellScreen) Print(args PrintArgs) int {
 	return screenPrint(t, args)
 }
 
diff --git a/screen_inline.go b/screen_inline.go
index ed954ba..6aec588 100644
--- a/screen_inline.go
+++ b/screen_inline.go
@@ -209,7 +209,7 @@ func (s *InlineScreen) PollEvent(ctx context.Context, cfg *Config) chan Event {
 	return evCh
 }
 
-// SendEvent is a no-op for InlineScreen (same as Termbox).
+// SendEvent is a no-op for InlineScreen (same as TcellScreen).
 func (s *InlineScreen) SendEvent(_ Event) {}
 
 // Suspend is a no-op for inline mode.
diff --git a/screen_posix.go b/screen_posix.go
index 4fceee6..de73da2 100644
--- a/screen_posix.go
+++ b/screen_posix.go
@@ -5,6 +5,6 @@ package peco
 
 // PostInit is a no-op on POSIX systems. tcell auto-detects
 // color capability via terminfo.
-func (t *Termbox) PostInit(cfg *Config) error {
+func (t *TcellScreen) PostInit(cfg *Config) error {
 	return nil
 }
diff --git a/screen_test.go b/screen_test.go
index bdfb93d..4331b1d 100644
--- a/screen_test.go
+++ b/screen_test.go
@@ -8,12 +8,12 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// TestTermboxSuspendHandlerExitsOnClose verifies that the suspend handler
+// TestTcellScreenSuspendHandlerExitsOnClose verifies that the suspend handler
 // goroutine (started by PollEvent) exits when Close() is called, even if
 // the context has not been cancelled. This is the goroutine leak described
 // in CODE_REVIEW.md §7.1.
-func TestTermboxSuspendHandlerExitsOnClose(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenSuspendHandlerExitsOnClose(t *testing.T) {
+	tb := NewTcellScreen()
 
 	// Use a context that will NOT be cancelled during this test.
 	// The goroutine must exit via doneCh, not ctx.Done().
@@ -46,11 +46,11 @@ func TestTermboxSuspendHandlerExitsOnClose(t *testing.T) {
 	}
 }
 
-// TestTermboxPollingGoroutineExitsOnClose verifies that a goroutine blocked
+// TestTcellScreenPollingGoroutineExitsOnClose verifies that a goroutine blocked
 // on resumeCh (as the polling goroutine would be after screen finalization)
 // exits when Close() is called.
-func TestTermboxPollingGoroutineExitsOnClose(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenPollingGoroutineExitsOnClose(t *testing.T) {
+	tb := NewTcellScreen()
 
 	ctx := context.Background()
 
@@ -78,11 +78,11 @@ func TestTermboxPollingGoroutineExitsOnClose(t *testing.T) {
 	}
 }
 
-// TestTermboxCloseIdempotent verifies that Close() can be called multiple
+// TestTcellScreenCloseIdempotent verifies that Close() can be called multiple
 // times without panicking (important because the suspend handler calls
 // finiScreen and then Close() is called at shutdown).
-func TestTermboxCloseIdempotent(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenCloseIdempotent(t *testing.T) {
+	tb := NewTcellScreen()
 
 	require.NotPanics(t, func() {
 		tb.Close()
@@ -91,11 +91,11 @@ func TestTermboxCloseIdempotent(t *testing.T) {
 	})
 }
 
-// TestTermboxSuspendThenClose verifies that a suspend (which calls finiScreen)
+// TestTcellScreenSuspendThenClose verifies that a suspend (which calls finiScreen)
 // followed by a permanent Close() works correctly — the doneCh should be
 // closed by Close() even though finiScreen was already called.
-func TestTermboxSuspendThenClose(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenSuspendThenClose(t *testing.T) {
+	tb := NewTcellScreen()
 
 	ctx := context.Background()
 
@@ -130,8 +130,8 @@ func TestTermboxSuspendThenClose(t *testing.T) {
 	}
 }
 
-func TestTermboxResumeNoDeadlock(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenResumeNoDeadlock(t *testing.T) {
+	tb := NewTcellScreen()
 
 	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
 	defer cancel()
@@ -158,8 +158,8 @@ func TestTermboxResumeNoDeadlock(t *testing.T) {
 	}
 }
 
-func TestTermboxResumeDoesNotDropSend(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenResumeDoesNotDropSend(t *testing.T) {
+	tb := NewTcellScreen()
 
 	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
 	defer cancel()
@@ -181,8 +181,8 @@ func TestTermboxResumeDoesNotDropSend(t *testing.T) {
 	}
 }
 
-func TestTermboxResumeContextCancelled(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenResumeContextCancelled(t *testing.T) {
+	tb := NewTcellScreen()
 
 	ctx, cancel := context.WithCancel(context.Background())
 
@@ -203,8 +203,8 @@ func TestTermboxResumeContextCancelled(t *testing.T) {
 	}
 }
 
-func TestTermboxResumeContextCancelledWhileWaitingForReply(t *testing.T) {
-	tb := NewTermbox()
+func TestTcellScreenResumeContextCancelledWhileWaitingForReply(t *testing.T) {
+	tb := NewTcellScreen()
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
diff --git a/screen_windows.go b/screen_windows.go
index 6390d95..755b178 100644
--- a/screen_windows.go
+++ b/screen_windows.go
@@ -1,6 +1,6 @@
 package peco
 
 // PostInit is a no-op on Windows. tcell handles input mode automatically.
-func (t *Termbox) PostInit(cfg *Config) error {
+func (t *TcellScreen) PostInit(cfg *Config) error {
 	return nil
 }