# split_window

Source: https://libtmux.org/en/java/latest/mcp/tools/split_window/

> Creates a pane whose configured process starts after the split. Start a pane's configured process; accepts no command payload.

MCP is in development

Server behavior and tool contracts may change. Tool availability depends on the server configuration.

Creates a pane whose configured process starts after the split. Start a pane’s configured process; accepts no command payload.

[All Java tools](../) · [JSON](../split_window.json) · [Source](https://github.com/libtmux/libtmux-java/blob/842228310449e879ebcaa3f910597757c9dbffd6/libtmux-mcp/src/main/java/io/github/libtmux/mcp/Catalog.java#L731)

## Arguments

* `direction` optional · string

  below, above, left or right.

* `pane_id` required · string

  The pane to act on, such as %1. Every listing tool returns these.

* `percent` optional · integer

  Share of the split occupied by the new pane. Defaults to 50.

  Default: `50`.

* `start_directory` optional · string

  An absolute literal start directory.

## Schemas

The schema defines required fields, nested values, defaults, and validation constraints.