1. A program product stored on a computer storage media, the computer storage media containing instructions for execution by a computer, which, when executed by the computer, cause the computer to implement a method for automated interaction diagram generation using source code breakpoints, the method comprising: loading source code into an integrated development environment; receiving a plurality of breakpoints using the integrated development environment that corresponds to a plurality of locations within the source code; executing the source code; determining that one of the plurality of breakpoints is reached during the code execution; collecting one of a plurality of breakpoint data in response to the determining; and generating an interaction diagram using the plurality of breakpoint data, wherein, for each individual one of the plurality of breakpoints, the generating comprises: selecting one of the plurality of breakpoints; determining whether the selected breakpoint has custom attributes; in response to determining that the selected breakpoint has custom attributes, providing the custom attributes on the interaction diagram for the selected breakpoint; and in response to determining that the selected breakpoint does not have custom attributes, providing default attributes on the interaction diagram for the selected breakpoint.