docs: tmux notes

README.md

@@ -29,17 +29,33 @@ output := NewOutput(sshSession, envs)
 output.Copy("Hello awesome!")
 ```
 
+If you're using tmux, you could pass the `TMUX` environment variable to help detect tmux:
+
+```sh
+ssh -o SendEnv=TMUX <host>
+```
+
 ### Tmux users
 
-If you're using tmux, make sure you set `set -g default-terminal` in your
-`~/.tmux.conf` file, to a value that starts with `tmux-`. `tmux-256color` for
-instance. See [this](https://github.com/tmux/tmux/wiki/FAQ#why-do-you-use-the-screen-terminal-description-inside-tmux)
+If you're using tmux, make sure you set `set -g default-terminal` in your tmux
+config, to a value that starts with `tmux-`. `tmux-256color` for instance. See
+[this](https://github.com/tmux/tmux/wiki/FAQ#why-do-you-use-the-screen-terminal-description-inside-tmux)
 for more details.
 
-You can instead pass the `TMUX` environment variable:
+`go-osc52` will wrap the OSC52 sequence in a `tmux` escape sequence if tmux is
+detected. If you're running tmux >= 3.3, OSC52 won't work and you'll need to set
+the `set -g allow-passthrough on` in your tmux config.
 
-```sh
-ssh -o SendEnv=TMUX <host>
+```tmux
+set -g allow-passthrough on
+```
+
+or set `set -g set-clipboard on` in your tmux config and use your outer terminal in your code instead:
+
+```go
+// Assuming this code is running in tmux >= 3.3 in kitty
+seq := osc52.Sequence("Hello awesome!", "xterm-kitty", osc52.ClipboardC)
+os.Stderr.WriteString(seq)
 ```
 
 ## Credits