0.66.0

Fix #4548

.github/workflows/linux.yml

@@ -23,7 +23,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version: "1.23"
 

.github/workflows/macos.yml

@@ -20,7 +20,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version: "1.23"
 

CHANGELOG.md

@@ -4,7 +4,34 @@ CHANGELOG
 0.66.0
 ------
 
-### Introducing "raw" mode
+### Quick summary
+
+This version introduces many new features centered around the new "raw" mode.
+
+| Type        | Class   | Name                | Description                                        |
+| :--         | :--     | :--                 | :--                                                |
+| New         | Option  | `--raw`             | Enable raw mode by default                         |
+| New         | Option  | `--gutter CHAR`     | Set the gutter column character                    |
+| New         | Option  | `--gutter-raw CHAR` | Set the gutter column character in raw mode        |
+| Enhancement | Option  | `--listen SOCKET`   | Added support for Unix domain sockets              |
+| New         | Action  | `toggle-raw`        | Toggle raw mode                                    |
+| New         | Action  | `enable-raw`        | Enable raw mode                                    |
+| New         | Action  | `disable-raw`       | Disable raw mode                                   |
+| New         | Action  | `up-match`          | Move up to the matching item                       |
+| New         | Action  | `down-match`        | Move down to the matching item                     |
+| New         | Action  | `best`              | Move to the  matching item with the best score     |
+| New         | Color   | `nomatch`           | Color for non-matching items in raw mode           |
+| New         | Env Var | `FZF_RAW`           | Matching status in raw mode (0, 1, or undefined)   |
+| New         | Env Var | `FZF_DIRECTION`     | `up` or `down` depending on the layout             |
+| New         | Env Var | `FZF_SOCK`          | Path to the Unix domain socket fzf is listening on |
+| Enhancement | Key     | `CTRL-N`            | `down` -> `down-match`                             |
+| Enhancement | Key     | `CTRL-P`            | `up` -> `up-match`                                 |
+| Enhancement | Shell   | `CTRL-R` binding    | Toggle raw mode with `ALT-R`                       |
+| Enhancement | Shell   | `CTRL-R` binding    | Opt-out with an empty `FZF_CTRL_R_COMMAND`         |
+
+### 1. Introducing "raw" mode
+
+![](https://github.com/user-attachments/assets/9640ae11-b5f7-43fb-95f1-c29307fc17c2)
 
 This version introduces a new "raw" mode (named so because it shows the list
 "unfiltered"). In raw mode, non-matching items stay in their original positions,
@@ -116,7 +143,11 @@ fzf --raw --bind 'enter:transform:[[ ${FZF_RAW-1} = 1 ]] && echo accept || echo
 
 The `CTRL-R` binding (command history) now lets you toggle raw mode with `ALT-R`.
 
-### Style changes
+### 2. Style changes
+
+The screenshot on the right shows the updated gutter style:
+
+![](https://github.com/user-attachments/assets/8ea7b5ef-c99e-4686-905b-22eb078b700a)
 
 This version includes a few minor updates to fzf's classic visual style:
 
@@ -124,7 +155,25 @@ This version includes a few minor updates to fzf's classic visual style:
 - Markers no longer use background colors.
 - The `--color base16` theme (alias: `16`) has been updated for better compatibility with both dark and light themes.
 
-### Added options
+### 3. `--listen` now supports Unix domain sockets
+
+If an argument to `--listen` ends with `.sock`, fzf will listen on a Unix
+domain socket at the specified path.
+
+```sh
+fzf --listen /tmp/fzf.sock --no-tmux
+
+# GET
+curl --unix-socket /tmp/fzf.sock http
+
+# POST
+curl --unix-socket /tmp/fzf.sock http -d up
+```
+
+Note that any existing file at the given path will be removed before creating
+the socket, so avoid using an important file path.
+
+### 4. Added options
 
 #### `--gutter CHAR`
 
@@ -149,20 +198,24 @@ fzf --gutter ' ' --color gutter:reverse
 
 As noted above, the `--gutter-raw CHAR` option was also added for customizing the gutter column in raw mode.
 
-### Added actions
+### 5. Added actions
 
-| Action        | Description                                                                                       |
-| ---           | ---                                                                                               |
-| `up-match`    | Move up to the matching item; identical to `up` if raw mode is disabled                           |
-| `down-match`  | Move down to the matching item; identical to `down` if raw mode is disabled                       |
-| `toggle-raw`  | Toggle raw mode                                                                                   |
-| `enable-raw`  | Enable raw mode                                                                                   |
-| `disable-raw` | Disable raw mode                                                                                  |
-| `best`        | Move to the first matching item with the best score; identical to `first` if raw mode is disabled |
+The following actions were introduced to support working with raw mode:
 
-### Added environment variable
+| Action        | Description                                                                                 |
+| :--           | :--                                                                                         |
+| `toggle-raw`  | Toggle raw mode                                                                             |
+| `enable-raw`  | Enable raw mode                                                                             |
+| `disable-raw` | Disable raw mode                                                                            |
+| `up-match`    | Move up to the matching item; identical to `up` if raw mode is disabled                     |
+| `down-match`  | Move down to the matching item; identical to `down` if raw mode is disabled                 |
+| `best`        | Move to the matching item with the best score; identical to `first` if raw mode is disabled |
 
-`$FZF_DIRECTION` is now exported to child processes, indicating the list direction of the current layout.
+### 6. Added environment variables
+
+#### `$FZF_DIRECTION`
+
+`$FZF_DIRECTION` is now exported to child processes, indicating the list direction of the current layout:
 
 - `up` for the default layout
 - `down` for `reverse` or `reverse-list`
@@ -174,7 +227,34 @@ like `{up,down}-match`, `{up,down}-selected`, and `toggle+{up,down}`.
 fzf --raw --bind 'result:first+transform:[[ $FZF_RAW = 0 ]] && echo $FZF_DIRECTION-match'
 ```
 
-### Breaking changes
+#### `$FZF_SOCK`
+
+When fzf is listening on a Unix domain socket using `--listen`, the path to the
+socket is exported as `$FZF_SOCK`, analogous to `$FZF_PORT` for TCP sockets.
+
+#### `$FZF_RAW`
+
+As described above, `$FZF_RAW` is now exported to child processes in raw mode,
+indicating whether the current item is a match (`1`) or not (`0`). It is not
+defined when not in raw mode.
+
+#### `$FZF_CTRL_R_COMMAND`
+
+You can opt-out `CTRL-R` binding from the shell integration by setting
+`FZF_CTRL_R_COMMAND` to an empty string. Setting it to any other value is not
+supported and will result in a warning.
+
+```sh
+# Disable the CTRL-R binding from the shell integration
+FZF_CTRL_R_COMMAND= eval "$(fzf --bash)"
+```
+
+### 7. Added key support for `--bind`
+
+Pull request [#3996](https://github.com/junegunn/fzf/pull/3996) added support
+for many additional keys for `--bind` option, such as `ctrl-backspace`.
+
+### 8. Breaking changes
 
 #### Hiding the gutter column
 

install

@@ -2,7 +2,7 @@
 
 set -u
 
-version=0.65.2
+version=0.66.0
 auto_completion=
 key_bindings=
 update_config=2

install.ps1

@@ -1,4 +1,4 @@
-$version="0.65.2"
+$version="0.66.0"
 
 $fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
 

main.go

@@ -11,7 +11,7 @@ import (
 	"github.com/junegunn/fzf/src/protector"
 )
 
-var version = "0.65"
+var version = "0.66"
 var revision = "devel"
 
 //go:embed shell/key-bindings.bash

man/man1/fzf-tmux.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf\-tmux 1 "Aug 2025" "fzf 0.65.2" "fzf\-tmux - open fzf in tmux split pane"
+.TH fzf\-tmux 1 "Oct 2025" "fzf 0.66.0" "fzf\-tmux - open fzf in tmux split pane"
 
 .SH NAME
 fzf\-tmux - open fzf in tmux split pane

man/man1/fzf.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf 1 "Sep 2025" "fzf 0.66.0" "fzf - a command-line fuzzy finder"
+.TH fzf 1 "Oct 2025" "fzf 0.66.0" "fzf - a command-line fuzzy finder"
 
 .SH NAME
 fzf - a command-line fuzzy finder
@@ -1133,19 +1133,25 @@ On Windows, the default value is \fBcmd /s/c\fR when \fB$SHELL\fR is not
 set.
 
 .TP
-.B "\-\-listen[=[ADDR:]PORT]" "\-\-listen\-unsafe[=[ADDR:]PORT]"
-Start HTTP server and listen on the given address. It allows external processes
-to send actions to perform via POST method.
+.B "\-\-listen[=SOCKET_PATH|[ADDR:]PORT]" "\-\-listen\-unsafe[=[ADDR:]PORT]"
+Start HTTP server and listen on the given address or Unix socket. It allows
+external processes to send actions to perform via POST method and query the
+program state via GET method. For the argument to be recognized as a socket
+path, it must have \fB.sock\fR extension.
 
 - If the port number is omitted or given as 0, fzf will automatically choose
-a port and export it as \fBFZF_PORT\fR environment variable to the child processes
+a port and export it as \fBFZF_PORT\fR environment variable to the child processes.
+
+- If a Unix socket path is given, fzf will create a Unix domain socket at the
+  given path. The existing file will be removed. The path to the socket file
+  is exported as \fBFZF_SOCK\fR environment variable.
 
 - If \fBFZF_API_KEY\fR environment variable is set, the server would require
-sending an API key with the same value in the \fBx\-api\-key\fR HTTP header
+  sending an API key with the same value in the \fBx\-api\-key\fR HTTP header.
 
-- \fBFZF_API_KEY\fR is required for a non-localhost listen address
+- \fBFZF_API_KEY\fR is required for a non-localhost listen address.
 
-- To allow remote process execution, use \fB\-\-listen\-unsafe\fR
+- To allow remote process execution, use \fB\-\-listen\-unsafe\fR.
 
 e.g.
      \fB# Start HTTP server on port 6266
@@ -1184,6 +1190,18 @@ e.g.
      '
      \fR
 
+Here is an example script that uses a Unix socket instead of a TCP port.
+
+    \fB
+    fzf --listen=/tmp/fzf.sock
+
+    # GET
+    curl --unix-socket /tmp/fzf.sock http
+
+    # POST
+    curl --unix-socket /tmp/fzf.sock http -d up
+    \fR
+
 .SS DIRECTORY TRAVERSAL
 .TP
 .B "\-\-walker=[file][,dir][,follow][,hidden]"
@@ -1373,6 +1391,8 @@ fzf exports the following environment variables to its child processes.
 .br
 .BR FZF_PORT "            Port number when \-\-listen option is used"
 .br
+.BR FZF_SOCK "            Unix socket path when \-\-listen option is used"
+.br
 .BR FZF_PREVIEW_TOP "     Top position of the preview window"
 .br
 .BR FZF_PREVIEW_LEFT "    Left position of the preview window"

shell/key-bindings.bash

@@ -7,6 +7,7 @@
 # - $FZF_TMUX_OPTS
 # - $FZF_CTRL_T_COMMAND
 # - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_COMMAND
 # - $FZF_CTRL_R_OPTS
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
@@ -132,9 +133,14 @@ if ((BASH_VERSINFO[0] < 4)); then
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
-  bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
-  bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
+  if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
+    if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
+      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+    fi
+    bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
+    bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
+    bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
+  fi
 else
   # CTRL-T - Paste the selected file path into the command line
   if [[ ${FZF_CTRL_T_COMMAND-x} != "" ]]; then
@@ -144,9 +150,14 @@ else
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind -m emacs-standard -x '"\C-r": __fzf_history__'
-  bind -m vi-command -x '"\C-r": __fzf_history__'
-  bind -m vi-insert -x '"\C-r": __fzf_history__'
+  if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
+    if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
+      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+    fi
+    bind -m emacs-standard -x '"\C-r": __fzf_history__'
+    bind -m vi-command -x '"\C-r": __fzf_history__'
+    bind -m vi-insert -x '"\C-r": __fzf_history__'
+  fi
 fi
 
 # ALT-C - cd into the selected directory

shell/key-bindings.fish

@@ -7,6 +7,7 @@
 # - $FZF_TMUX_OPTS
 # - $FZF_CTRL_T_COMMAND
 # - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_COMMAND
 # - $FZF_CTRL_R_OPTS
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
@@ -214,8 +215,13 @@ function fzf_key_bindings
     commandline -f repaint
   end
 
-  bind \cr fzf-history-widget
-  bind -M insert \cr fzf-history-widget
+  if not set -q FZF_CTRL_R_COMMAND; or test -n "$FZF_CTRL_R_COMMAND"
+    if test -n "$FZF_CTRL_R_COMMAND"
+      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+    end
+    bind \cr fzf-history-widget
+    bind -M insert \cr fzf-history-widget
+  end
 
   if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
     bind \ct fzf-file-widget

shell/key-bindings.zsh

@@ -7,6 +7,7 @@
 # - $FZF_TMUX_OPTS
 # - $FZF_CTRL_T_COMMAND
 # - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_COMMAND
 # - $FZF_CTRL_R_OPTS
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
@@ -150,10 +151,15 @@ fzf-history-widget() {
   zle reset-prompt
   return $ret
 }
-zle     -N            fzf-history-widget
-bindkey -M emacs '^R' fzf-history-widget
-bindkey -M vicmd '^R' fzf-history-widget
-bindkey -M viins '^R' fzf-history-widget
+if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
+  if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
+    echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+  fi
+  zle     -N            fzf-history-widget
+  bindkey -M emacs '^R' fzf-history-widget
+  bindkey -M vicmd '^R' fzf-history-widget
+  bindkey -M viins '^R' fzf-history-widget
+fi
 fi
 
 } always {

src/options.go

@@ -206,8 +206,10 @@ Usage: fzf [options]
 
   ADVANCED
     --with-shell=STR         Shell command and flags to start child processes with
-    --listen[=[ADDR:]PORT]   Start HTTP server to receive actions (POST /)
+    --listen[=[ADDR:]PORT]   Start HTTP server to receive actions via TCP
                              (To allow remote process execution, use --listen-unsafe)
+    --listen=SOCKET_PATH     Start HTTP server to receive actions via Unix domain socket
+                             (Path should end with .sock)
 
   DIRECTORY TRAVERSAL        (Only used when $FZF_DEFAULT_COMMAND is not set)
     --walker=OPTS            [file][,dir][,follow][,hidden] (default: file,follow,hidden)

src/server.go

@@ -46,15 +46,20 @@ type httpServer struct {
 type listenAddress struct {
 	host string
 	port int
+	sock string
 }
 
 func (addr listenAddress) IsLocal() bool {
-	return addr.host == "localhost" || addr.host == "127.0.0.1"
+	return addr.host == "localhost" || addr.host == "127.0.0.1" || len(addr.sock) > 0
 }
 
-var defaultListenAddr = listenAddress{"localhost", 0}
+var defaultListenAddr = listenAddress{"localhost", 0, ""}
 
 func parseListenAddress(address string) (listenAddress, error) {
+	if strings.HasSuffix(address, ".sock") {
+		return listenAddress{"", 0, address}, nil
+	}
+
 	parts := strings.SplitN(address, ":", 3)
 	if len(parts) == 1 {
 		parts = []string{"localhost", parts[0]}
@@ -70,7 +75,7 @@ func parseListenAddress(address string) (listenAddress, error) {
 	if len(parts[0]) == 0 {
 		parts[0] = "localhost"
 	}
-	return listenAddress{parts[0], port}, nil
+	return listenAddress{parts[0], port, ""}, nil
 }
 
 func startHttpServer(address listenAddress, actionChannel chan []*action, getHandler func(getParams) string) (net.Listener, int, error) {
@@ -80,21 +85,40 @@ func startHttpServer(address listenAddress, actionChannel chan []*action, getHan
 	if !address.IsLocal() && len(apiKey) == 0 {
 		return nil, port, errors.New("FZF_API_KEY is required to allow remote access")
 	}
-	addrStr := fmt.Sprintf("%s:%d", host, port)
-	listener, err := net.Listen("tcp", addrStr)
-	if err != nil {
-		return nil, port, fmt.Errorf("failed to listen on %s", addrStr)
-	}
-	if port == 0 {
-		addr := listener.Addr().String()
-		parts := strings.Split(addr, ":")
-		if len(parts) < 2 {
-			return nil, port, fmt.Errorf("cannot extract port: %s", addr)
+
+	var listener net.Listener
+	var err error
+	if len(address.sock) > 0 {
+		if _, err := os.Stat(address.sock); err == nil {
+			// Check if the socket is already in use
+			if conn, err := net.Dial("unix", address.sock); err == nil {
+				conn.Close()
+				return nil, 0, fmt.Errorf("socket already in use: %s", address.sock)
+			}
+			os.Remove(address.sock)
 		}
-		var err error
-		port, err = strconv.Atoi(parts[len(parts)-1])
+		listener, err = net.Listen("unix", address.sock)
 		if err != nil {
-			return nil, port, err
+			return nil, 0, fmt.Errorf("failed to listen on %s", address.sock)
+		}
+		os.Chmod(address.sock, 0600)
+	} else {
+		addrStr := fmt.Sprintf("%s:%d", host, port)
+		listener, err = net.Listen("tcp", addrStr)
+		if err != nil {
+			return nil, port, fmt.Errorf("failed to listen on %s", addrStr)
+		}
+		if port == 0 {
+			addr := listener.Addr().String()
+			parts := strings.Split(addr, ":")
+			if len(parts) < 2 {
+				return nil, port, fmt.Errorf("cannot extract port: %s", addr)
+			}
+			var err error
+			port, err = strconv.Atoi(parts[len(parts)-1])
+			if err != nil {
+				return nil, port, err
+			}
 		}
 	}
 

src/terminal.go

@@ -1268,7 +1268,9 @@ func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor
 			return nil, err
 		}
 		t.listener = listener
-		t.listenPort = &port
+		if port > 0 {
+			t.listenPort = &port
+		}
 	}
 
 	if t.hasStartActions {
@@ -1292,6 +1294,9 @@ func (t *Terminal) environForPreview() []string {
 
 func (t *Terminal) environImpl(forPreview bool) []string {
 	env := os.Environ()
+	if t.listenAddr != nil && len(t.listenAddr.sock) > 0 {
+		env = append(env, "FZF_SOCK="+t.listenAddr.sock)
+	}
 	if t.listenPort != nil {
 		env = append(env, fmt.Sprintf("FZF_PORT=%d", *t.listenPort))
 	}
@@ -2454,6 +2459,13 @@ func (t *Terminal) resizeWindows(forcePreview bool, redrawBorder bool) {
 			innerHeight-shrink, tui.WindowList, noBorder, true)
 	}
 
+	if len(t.scrollbar) == 0 {
+		for y := 0; y < t.window.Height(); y++ {
+			t.window.Move(y, t.window.Width()-1)
+			t.window.Print(" ")
+		}
+	}
+
 	createInnerWindow := func(b tui.Window, shape tui.BorderShape, windowType tui.WindowType, shift int) tui.Window {
 		top := b.Top()
 		left := b.Left() + shift

src/tui/tui.go

@@ -1117,6 +1117,22 @@ func InitTheme(theme *ColorTheme, baseTheme *ColorTheme, boldify bool, forceBlac
 		theme.Bg = ColorAttr{colBlack, AttrUndefined}
 	}
 
+	if boldify {
+		boldify := func(c ColorAttr) ColorAttr {
+			dup := c
+			if (c.Attr & AttrRegular) == 0 {
+				dup.Attr |= BoldForce
+			}
+			return dup
+		}
+		theme.Current = boldify(theme.Current)
+		theme.CurrentMatch = boldify(theme.CurrentMatch)
+		theme.Prompt = boldify(theme.Prompt)
+		theme.Input = boldify(theme.Input)
+		theme.Cursor = boldify(theme.Cursor)
+		theme.Spinner = boldify(theme.Spinner)
+	}
+
 	o := func(a ColorAttr, b ColorAttr) ColorAttr {
 		c := a
 		if b.Color != colUndefined {
@@ -1232,22 +1248,6 @@ func InitTheme(theme *ColorTheme, baseTheme *ColorTheme, boldify bool, forceBlac
 	theme.FooterBorder = o(theme.Border, theme.FooterBorder)
 	theme.FooterLabel = o(theme.BorderLabel, theme.FooterLabel)
 
-	if boldify {
-		boldify := func(c ColorAttr) ColorAttr {
-			dup := c
-			if (c.Attr & AttrRegular) == 0 {
-				dup.Attr |= BoldForce
-			}
-			return dup
-		}
-		theme.Current = boldify(theme.Current)
-		theme.CurrentMatch = boldify(theme.CurrentMatch)
-		theme.Prompt = boldify(theme.Prompt)
-		theme.Input = boldify(theme.Input)
-		theme.Cursor = boldify(theme.Cursor)
-		theme.Spinner = boldify(theme.Spinner)
-	}
-
 	if theme.Nomatch.IsUndefined() {
 		theme.Nomatch.Attr = Dim
 	}

test/test_layout.rb

@@ -1192,6 +1192,29 @@ class TestLayout < TestInteractive
     tmux.until { assert_block(block, it) }
   end
 
+  # https://github.com/junegunn/fzf/issues/4537
+  def test_no_scrollbar_preview_toggle
+    x = 'x' * 300
+    y = 'y' * 300
+    tmux.send_keys %(yes #{x} | head -1000 | fzf --bind 'tab:toggle-preview' --border --no-scrollbar --preview 'echo #{y}' --preview-window 'border-left'), :Enter
+
+    # │ ▌ xxxxxxxx·· │ yyyyyyyy│
+    tmux.until do |lines|
+      lines.any? { it.match?(/x·· │ y+│$/) }
+    end
+    tmux.send_keys :Tab
+
+    # │ ▌ xxxxxxxx·· │
+    tmux.until do |lines|
+      lines.none? { it.match?(/x··y│$/) }
+    end
+
+    tmux.send_keys :Tab
+    tmux.until do |lines|
+      lines.any? { it.match?(/x·· │ y+│$/) }
+    end
+  end
+
   def test_combinations
     skip unless ENV['LONGTEST']