This Markdown-based task manager is more effective than I imagined

Since I'm a freelancer and I contribute to multiple publications, it's extremely vital for me to stay organized. I need to keep track of all the articles I've pitched to the different publications I write for, to ensure I deliver my work within the stipulated duration, and that there are no conflicts between all the pitches for the different websites. Now, there are several tools available for this sort of workflow. There's Asana, Trello, and a bunch of other software that I already use, since they are also used by the companies I work with. So, I wanted a different app to consolidate all my tasks into one.