# tmux.Server.AppendOption

- **Module:** tmux.Server
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/option_mutation.go#L144
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-server-appendoption/

```
tmux.Server.AppendOption(ctx: context.Context, name: string, value: string, options: SetOptionOptions) -> error
```

AppendOption appends to a server-scope option without refreshing existing models. Completed failures are secret-safe option errors; cancellation does not prove the append was not accepted.