SoC line-level history browser question

I would like to know how the interface (the command line arguments
passed to the program) and output should look like (a rough example
would be fine).
I'm very interested in participating in Google Summer of Code, but
living in the Southern Hemisphere means that I would have to do it in
parallel with my university classes, therefore limiting the scope of
projects that I can handle. The line-level history browser appears to
be well within my reach.

André Ferreira