# split_window

Source: https://libtmux.org/en/py/stable/mcp/tools/split_window/

> Split a tmux window to create a new pane.

tool MCPstable

MCP is in development

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

* **split_window**( [direction](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fdirection)?: "above" | "below" | "left" | "right" | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [environment](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fenvironment)?: [Record](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)")\<string, [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)")> | [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [pane_id](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fpane_id)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [session_id](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsession_id)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [session_name](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsession_name)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [shell](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fshell)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [size](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsize)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [integer](https://json-schema.org/understanding-json-schema/reference/numeric "numeric (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [socket_name](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsocket_name)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [start_directory](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fstart_directory)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [suppress_persistent_history](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsuppress_persistent_history)?: [boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)"), [window_id](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fwindow_id)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), [window_index](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fwindow_index)?: [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"), )

  tool \[[source](https://github.com/tmux-python/libtmux-mcp/blob/4daddc0dfca96c43bf521d818bf91564e1434760/src/libtmux_mcp/tools/window_tools.py#L512)][¶](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window)

  Split a tmux window to create a new pane.

  Creates a new pane by splitting an existing one. Use direction to choose above/below/left/right. Returns the new pane’s info including its pane_id.

  * MCP request method

    `tools/call` Send `split_window` as the tool name, with the arguments below.

  ## Arguments[#](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.parameters)

  * **[`direction`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fdirection)**? = `null` ("above" | "below" | "left" | "right" | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Split direction.

  * **[`environment`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fenvironment)**? = `null` ([Record](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)")\<string, [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)")> | [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    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.

  * **[`pane_id`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fpane_id)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Pane ID to split from. If given, splits adjacent to this pane.

  * **[`session_id`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsession_id)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Session ID (e.g. ‘$1’).

  * **[`session_name`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsession_name)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Session name.

  * **[`shell`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fshell)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Shell command to run in the new pane.

  * **[`size`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsize)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [integer](https://json-schema.org/understanding-json-schema/reference/numeric "numeric (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Size of the new pane. Use a string with ’%%’ suffix for percentage (e.g. ‘50%%’) or an integer for lines/columns.

  * **[`socket_name`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsocket_name)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    tmux socket name.

  * **[`start_directory`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fstart_directory)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Existing directory to start in. `~` expands; a relative path resolves against the MCP server process’s directory.

  * **[`suppress_persistent_history`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fsuppress_persistent_history)**? = `false` ([boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)"))

    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.

  * **[`window_id`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fwindow_id)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Window ID (e.g. ‘@1’).

  * **[`window_index`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.input%2Fproperties%2Fwindow_index)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Window index within the session.

  No other arguments are accepted.

  ## Result[#](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.result)

  Returns [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)")

  * **[`is_caller`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fis_caller)**? = `null` ([boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    MCP caller identity for this pane. `True` when the pane matches the caller’s `TMUX_PANE` *and* lives on the same tmux socket as the caller’s `TMUX` (verified via socket realpath); `False` otherwise, including the case where the pane id matches but the socket does not or cannot be proven to; `None` when the MCP process is not running inside tmux at all.

  * **[`pane_active`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_active)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Active flag (‘1’ or ‘0’)

  * **[`pane_at_bottom`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_at_bottom)**? = `null` ([boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    True when the pane touches the window’s bottom edge.

  * **[`pane_at_left`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_at_left)**? = `null` ([boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    True when the pane touches the window’s left edge.

  * **[`pane_at_right`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_at_right)**? = `null` ([boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    True when the pane touches the window’s right edge.

  * **[`pane_at_top`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_at_top)**? = `null` ([boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    True when the pane touches the window’s top edge. tmux accounts for [`pane-border-status`](https://libtmux.org/en/tmux/latest/catalog/options/pane-border-status/) here, so the top row may be 1 instead of 0 when the status bar is at the top.

  * **[`pane_bottom`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_bottom)**? = `null` ([integer](https://json-schema.org/understanding-json-schema/reference/numeric "numeric (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Bottom edge row (inclusive), window-relative.

  * **[`pane_current_command`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_current_command)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Running command

  * **[`pane_current_path`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_current_path)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Current working directory

  * **[`pane_height`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_height)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Height in rows

  * **[`pane_id`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_id)** ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)"))

    Pane ID (e.g. ‘%1’)

  * **[`pane_index`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_index)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Pane index

  * **[`pane_left`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_left)**? = `null` ([integer](https://json-schema.org/understanding-json-schema/reference/numeric "numeric (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Left edge column, 0-based and window-relative.

  * **[`pane_pid`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_pid)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Process ID

  * **[`pane_right`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_right)**? = `null` ([integer](https://json-schema.org/understanding-json-schema/reference/numeric "numeric (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Right edge column (inclusive), window-relative.

  * **[`pane_title`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_title)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Pane title

  * **[`pane_top`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_top)**? = `null` ([integer](https://json-schema.org/understanding-json-schema/reference/numeric "numeric (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Top edge row, 0-based and window-relative.

  * **[`pane_tty`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_tty)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    TTY device path of the pane (e.g. ‘/dev/pts/5’).

  * **[`pane_width`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fpane_width)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Width in columns

  * **[`session_id`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fsession_id)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Parent session ID

  * **[`window_id`](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.output%2Fproperties%2Fwindow_id)**? = `null` ([string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") | [null](https://json-schema.org/understanding-json-schema/reference/null "null (JSON Schema)"))

    Parent window ID

  ## Annotations[#](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.annotations)

  * [`destructiveHint`](https://libtmux.org/en/py/stable/mcp/reference/glossary/#destructiveHint)

    `true`

  * [`idempotentHint`](https://libtmux.org/en/py/stable/mcp/reference/glossary/#idempotentHint)

    `false`

  * [`openWorldHint`](https://libtmux.org/en/py/stable/mcp/reference/glossary/#openWorldHint)

    `true`

  * [`readOnlyHint`](https://libtmux.org/en/py/stable/mcp/reference/glossary/#readOnlyHint)

    `false`

  ## Protocol data[#](https://libtmux.org/en/py/stable/mcp/tools/split_window/#mcp.tool.split_window.schemas)

  Use the complete advertised contract for validation and client integration.

  Input schema

  ```json
  {
    "additionalProperties": false,
    "properties": {
      "direction": {
        "anyOf": [
          {
            "enum": [
              "above",
              "below",
              "left",
              "right"
            ],
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Split direction."
      },
      "environment": {
        "anyOf": [
          {
            "additionalProperties": {
              "type": "string"
            },
            "type": "object"
          },
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Per-process environment as a mapping or JSON object string. Values do\nnot modify the tmux session environment. Each item becomes a tmux\n``-e`` launch option. Values may be visible to host process inspection\nin the tmux client argv during launch and in the child environment\nafterward; MCP audit redaction does not hide either surface. Pass\ncredential references, not literal credentials."
      },
      "pane_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Pane ID to split from. If given, splits adjacent to this pane."
      },
      "session_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Session ID (e.g. '$1')."
      },
      "session_name": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Session name."
      },
      "shell": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Shell command to run in the new pane."
      },
      "size": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "integer"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Size of the new pane. Use a string with '%%' suffix for\npercentage (e.g. '50%%') or an integer for lines/columns."
      },
      "socket_name": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "tmux socket name."
      },
      "start_directory": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Existing directory to start in. ``~`` expands; a relative path\nresolves against the MCP server process's directory."
      },
      "suppress_persistent_history": {
        "default": false,
        "description": "Whether to suppress persistent history for the spawned shell. Defaults\nto False for MCP and direct Python calls. This per-call option does not\ninherit LIBTMUX_SUPPRESS_HISTORY. Startup files may override these\ncontrols.",
        "type": "boolean"
      },
      "window_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Window ID (e.g. '@1')."
      },
      "window_index": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Window index within the session."
      }
    },
    "type": "object"
  }
  ```

  Output schema

  ```json
  {
    "description": "Serialized tmux pane.",
    "properties": {
      "is_caller": {
        "anyOf": [
          {
            "type": "boolean"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "MCP caller identity for this pane. ``True`` when the pane matches the caller's ``TMUX_PANE`` *and* lives on the same tmux socket as the caller's ``TMUX`` (verified via socket realpath); ``False`` otherwise, including the case where the pane id matches but the socket does not or cannot be proven to; ``None`` when the MCP process is not running inside tmux at all."
      },
      "pane_active": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Active flag ('1' or '0')"
      },
      "pane_at_bottom": {
        "anyOf": [
          {
            "type": "boolean"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "True when the pane touches the window's bottom edge."
      },
      "pane_at_left": {
        "anyOf": [
          {
            "type": "boolean"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "True when the pane touches the window's left edge."
      },
      "pane_at_right": {
        "anyOf": [
          {
            "type": "boolean"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "True when the pane touches the window's right edge."
      },
      "pane_at_top": {
        "anyOf": [
          {
            "type": "boolean"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "True when the pane touches the window's top edge. tmux accounts for ``pane-border-status`` here, so the top row may be 1 instead of 0 when the status bar is at the top."
      },
      "pane_bottom": {
        "anyOf": [
          {
            "type": "integer"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Bottom edge row (inclusive), window-relative."
      },
      "pane_current_command": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Running command"
      },
      "pane_current_path": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Current working directory"
      },
      "pane_height": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Height in rows"
      },
      "pane_id": {
        "description": "Pane ID (e.g. '%1')",
        "type": "string"
      },
      "pane_index": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Pane index"
      },
      "pane_left": {
        "anyOf": [
          {
            "type": "integer"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Left edge column, 0-based and window-relative."
      },
      "pane_pid": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Process ID"
      },
      "pane_right": {
        "anyOf": [
          {
            "type": "integer"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Right edge column (inclusive), window-relative."
      },
      "pane_title": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Pane title"
      },
      "pane_top": {
        "anyOf": [
          {
            "type": "integer"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Top edge row, 0-based and window-relative."
      },
      "pane_tty": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "TTY device path of the pane (e.g. '/dev/pts/5')."
      },
      "pane_width": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Width in columns"
      },
      "session_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Parent session ID"
      },
      "window_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null,
        "description": "Parent window ID"
      }
    },
    "required": [
      "pane_id"
    ],
    "type": "object"
  }
  ```