# LibTmux::MCP::CLI.run

**MCP concept example** A working example of the core library. It can change without notice.

- **Module:** LibTmux::MCP
- **Package:** libtmux-mcp
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/da7b6191b9439e3c84fa1c9eeaa9168263ee7af4/gems/libtmux-mcp/lib/libtmux/mcp/cli.rb#L9
- **Page:** https://libtmux.org/en/ruby/v0.1.1/mcp/reference/libtmux-mcp-cli-run-19of/

```
def self.run: (
  ::Array[::String],
  ?input: ::IO,
  ?out: untyped,
  ?err: untyped,
  ?environment: untyped
) -> ::Integer
```

Behavior: MCP CLI.

Behavior contract: MCP CLI.

## Parameters

- `arg1` (`::Array[::String]`)
- `input` (`::IO`)
- `out` (`untyped`)
- `err` (`untyped`)
- `environment` (`untyped`)

## Guides

Pages that discuss `run`.

- [Ruby MCP examples](/en/ruby/v0.1.1/mcp/examples/)
- [Ruby MCP guides](/en/ruby/v0.1.1/mcp/guides/)