Create a new message. Args: session_id: Parent session ID role: Message role content: Text content (if no

* Create a new model for a given path. * * @param options - Optional parameters to construct the model. * * @returns A new documen

* Move the head of an existing contiguous selection to extend the selection. * * @param index - The new head of the existing selection. *

* Create an iterator over the file types that have been registered. * * @returns A new iterator of file types.

* See if a widget already exists for the given path and widget name. * * @param path - The file path to use. * * @param widgetName - The n

Best-effort hook fan-out when a running event loop exists.

* Get the locator to the input of a cell * * @param cellIndex Cell index * @returns Locator to the cell input

* Returns an id based on the given code. * * @param code The source code. * @param kernel The kernel name from current session.

* Get the head and anchor of a contiguous cell selection. * * The head of a contiguous selection is always the active cell. * * If there a

* Get a config option for the editor.

* Get the locator on a given tab * * @param id Tab id * @returns Tab locator

* Get a widget factory by name. * * @param widgetName - The name of the widget factory. * * @returns A widget factory instance.

* Whether a notebook is currently active or not * * @returns Notebook active status

* The current line of the model.

* Navigate to a new path within the application. * * @param path - The new path or empty string if redirecting to root. * * @param options

* Replaces selection with the given text.

* Send a `kernel_info_request` message. * * @returns A promise that resolves with the response message. * * #### Notes * See [Messaging

* Restore the state of a debug session.

Run the agent with a user prompt. This implements the main ReAct loop: 1. Create user message 2. Get conversation history

* Change the session name. * * @returns A promise that resolves when the session has renamed. * * #### Notes * This uses the Jupyter RE

* Shut down all kernels. * * @returns A promise that resolves when all of the kernels are shut down.

If the first line is an incomplete `/prefix` command (no space after name), return prefix after `/`. Returns None when suggestions should be hidd

* The current status of the kernel.

Uninstall an extension by name or path. Returns `True` if a rebuild is recommended, `False` otherwise.

Convert message history to provider format with multimodal support. Uses incremental conversion: only processes new messages since the last c

Helper to use deprecated kwargs for AppOption

* Add a default editor extension * * @template T Extension parameter type * @param factory Extension factory

* Append a code block to the end of the virtual document. * * @param block - block to be appended * @param editorShift - position shift in

If cursor is in an ``@query`` token, return ``(at_col, query)`` else None. ``query`` is the substring after ``@`` up to the cursor (no spaces ins

* Set the ObservableMap to an empty map.

* Clear currently highlighted match.

* Clone a widget. * * @param widget - The source widget. * * @returns A new widget or `undefined`. * * #### Notes * Uses the sam

* Connect a command/argument pair to a given node so that when it is clicked, * the command will execute. * * @param node - The node being co

* Create a string and insert it in the database. * * @param path the path for the string. * * @returns the string that was created.

Filter built-ins by command name prefix (case-sensitive, as typed). ``extra``: optional (name, description) pairs from plugin skills, appended af

Flush the writer (no-op for structured logging).

* Returns the content for the given line number. * * @param line - The line of interest. * * @returns The value of the line.

* Returns the primary selection, never `null`.

* Get a theme. * * #### Notes * It falls back to the default theme * * @param name Theme name * @returns Theme extension

Get all built-in tools. Args: permissions: Permission service (optional) session_service: Session service (optional) mess

Create an integer parameter schema. Args: description: Parameter description **kwargs: Additional schema properties Returns:

Run the tool for logical operation *op* with normalized *params*.

* Whether a tab is active or not * * @param name Activity name * @returns Active status

List extensions for a given ``query`` search term. This will return the extensions installed (if ``query`` is None) or available if a

* Mark a trusted DOM boundary.

Mark a file as read (highlighted in the tree).

* Remove and return the value at a specific index. * * @param index - The index of the value of interest. * * @returns The value at the sp

* * A message handler invoked on a `'child-removed'` message. * * * @param widget - The widget to remove from the layout. * * #### Notes

Render 5 content lines + 1 trailing blank row (6 lines total; stable height). Row layout (matches claude-hud red-box screenshot): 1 sess

* Lazy load missing data of an item. * @param activeIndex - the item or its index * @remarks * Resolving item by index will be deprecat

* Resolve a relative url to an absolute url path.

* Restart a kernel. * * @param id - The id of the kernel to restart. * * @returns A promise that resolves when the kernel is restarted.

* Restore the widgets of a particular widget tracker. * * @param tracker - The widget tracker whose widgets will be restored. * * @param o

Run a single autonomous closed-loop cycle with structured outputs.

Scroll to the end (bottom) of the message list.

* Select a kernel for the session.

* Set URI fragment identifier.

* Set a config option for the editor.

Create a tool use start event.

Derive a filesystem-safe slug from a natural-language topic.

Best-effort parse of tool-call input. Models occasionally emit object-like strings that are not strict JSON (single quotes, Python dict liter

* Find the cell index containing the target html element. * * #### Notes * Returns -1 if the cell is not found.

* (Re-)focus an item in the directory listing. * * @param index The index of the item node to focus

Read first available key from params.