# tmux.Server.SetOption

- **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#L29
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-server-setoption/

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

SetOption stores a server-scope option without refreshing existing models. It may validate a known option against the live version. Completed failures return secret-safe option errors; cancellation does not prove the mutation was not accepted by tmux.