# libtmux_mcp.tools.session_tools.create_window

- **Module:** libtmux_mcp.tools.session_tools
- **Package:** libtmux-mcp
- **Language:** Python
- **Kind:** function
- **Source:** https://github.com/tmux-python/libtmux-mcp/blob/4daddc0dfca96c43bf521d818bf91564e1434760/src/libtmux_mcp/tools/session_tools.py#L113
- **Page:** https://libtmux.org/en/py/stable/mcp/reference/libtmux_mcp-tools-session_tools-create_window/

```
libtmux_mcp.tools.session_tools.create_window(
    session_name: str | None = None,
    session_id: str | None = None,
    window_name: str | None = None,
    start_directory: str | None = None,
    attach: bool = False,
    direction: t.Literal["before", "after"] | None = None,
    socket_name: str | None = None,
    environment: dict[str, str] | str | None = None,
    suppress_persistent_history: bool = False,
) -> WindowInfo
```

Create a new window in a tmux session.

Creates a window with one pane. Use split_window to add more panes afterward.

## Parameters

- `session_name` (`str | None`): Session name to look up.
- `session_id` (`str | None`): Session ID (e.g. '$1') to look up.
- `window_name` (`str | None`): Name for the new window.
- `start_directory` (`str | None`): Existing directory to start in. ``~`` expands; a relative path
resolves against the MCP server process's directory.
- `attach` (`bool`): Whether to make the new window active.
- `direction` (`t.Literal["before", "after"] | None`): Window placement direction.
- `socket_name` (`str | None`): tmux socket name. Defaults to LIBTMUX_SOCKET env var.
- `environment` (`dict[str, str] | str | None`): Per-process environment as a mapping or JSON object string. Values do
not modify the tmux session environment. Each item becomes a tmux
``-e`` launch option. Values may be visible to host process inspection
in the tmux client argv during launch and in the child environment
afterward; MCP audit redaction does not hide either surface. Pass
credential references, not literal credentials.
- `suppress_persistent_history` (`bool`): Whether to suppress persistent history for the spawned shell. Defaults
to False for MCP and direct Python calls. This per-call option does not
inherit LIBTMUX_SUPPRESS_HISTORY. Startup files may override these
controls.

## Returns

WindowInfo
    Serialized window object.