I was just trying to find a simple explanation for how to code Inform 7 and found this cheat sheet.
→ http://cs.gettysburg.edu/~tneller/fys187-4/Inform7_CheatSheet.pdf
I’m curious if there are other documents out there that give a brief, yet comprehensive breakdown of Inform 7.
“Brief yet comprehensive” is a tall order. You saw the note at the end of that one, right?
Sorry, I should have said “concise”, not brief.
I’ve no idea where this is linked to anymore or how I found it originally, but @Zed put up html files for the basic index tabs that are created when you first compile an Inform 7 game. This has a lot of really, really useful information. Contents
I say things like this a lot, but my 9.3 and 10.1 Project Indices are both linked to within the stickied I7 Docs and Resources post 
Thanks for putting so much work into both the project indices and the documentation remix, I rely on it constantly. I do wish that the table of contents listing WI and RB was mobile friendly, but the individual chapters look good on my iPhone and the ability to run examples in Borogove is really, really useful as well.
The next revision will have a mobile-friendly ToC.