User interface with command-line link creation for generating graphical objects linked to third-party content

A computer-implemented method comprising:

• receiving a first portion of a textual input within an editor of a graphical user interface provided by a first platform, the first portion of the textual input including a first command character designating the first portion of the textual input as a link-insertion command;
• receiving a second portion of the textual input in the editor following the first portion, the second portion of the textual input defining at least a portion of a hierarchical string;
• analyzing the second portion of the textual input to identify a second platform that is different than the first platform;
• in response to requesting hosted data from the second platform, receiving the hosted data, the hosted data including one or more of additional link path data or target content data;
• causing display of at least a portion of the hosted data in line with the textual input to define an additional portion of the hierarchical string;
• and
• in response to detecting completion of the hierarchical string, replacing the textual input with a selectable graphical object rendered within the editor of the first platform, the selectable graphical object including content of a respective object provided by the second platform.

A system for generating a selectable graphical object, the system comprising:

• one or more processors;
• computer-readable memory operably coupled to the one or more processors and storing computer-readable instructions that when executed by the one or more processors cause the system to:
• cause display of a graphical user interface of a documentation platform on a client device, the graphical user interface having content-generation region configured to receive user-generated content;
• in response to receiving textual input including a command character in the content-generation region, analyze the portion of the textual input to determine an external platform service;
• access, using an application programming interface, object data hosted by the external platform service;
• cause display of a set of selectable items corresponding to a format for displaying the object data;
• and
• in response to a user selection of one of the set of selectable items, cause the textual input to be replaced with a selectable graphical object rendered within the editor region, the selectable graphical object formatted in accordance with the user selection and including content extracted from a respective object provided by the external platform service.