Hello, I'm lubrito on Guix IRC, the Outreachy applicant. I'm working on the json output for the render-compare/derivation procedure (controller.scm). I would like to know if I am on the right path with what I've accomplished until now. The attached .ppm file shows the json I have so far. The json is showing only the data for the "outputs", but I already got the data for the rest and I could do the same to them. I am still thinking about how to make the code cleaner, because the way I'm doing could produce many redundancies. I also would like to know if the general structure of the json is correct or if it should be different. For example, under "outputs" "0" is denoting base and "1" is denoting target. The current code for the function is here http://sprunge.us/mKkzX2 -- Best Regards, Luciana Lima Brito MSc. in Computer Science Federal University of Uberlândia