Parallel development of a software system having multiple streams is managed. A selected section from a first artifact in a first stream of the multiple streams is removed from a plurality of sections included within the first artifact. A second artifact is created and includes the selected section and does not include at least one other section of the plurality of sections. An annotation, as a computer data structure, is generated and the annotation specifies the first artifact, a range within the first artifact corresponding to the selected section, and the second artifact.