From the website:<p>> sim is a simple, interactive, multi-file text editor designed for screens with monospaced font. It is heavily inspired on the 'vim' and 'sam' text editors, hence the name sim. The main goal of this software is portability. It only depends only on the C89 standard, and tries to minimize the usage of system calls as much as possible, making it easy (or not even necessary) to port to another environment.
Well I had to scout around a bit, but this is a 2021/2022 project, despite what that background might have you believe.<p>the editor itself is only about 1000 lines of C.