If you maintain an open-source project in the range of 10k-200k lines of code, add an ARCHITECTURE document next to README and CONTRIBUTING. Keep it short: every recurring contributor will have to read it. Only specify things that are unlikely to frequently change. Don’t try to keep it synchronized with code. Instead, revisit it a couple of times a year.

\<blockquote>ghostwriter is a cross-platform, aesthetic, distraction-free Markdown editor. - wereturtle/ghostwriter\</blockquote>