alt Hacker Newsive looked at your project before but forgot about it. I think mine is in a similar vein: https://github.com/mischief/clm
it grew out of annoyance of dependencies on js runtimes, probably similar to you. mine additionally works on solaris and esp32.
could be interesting to collaborate!
I'm using fourlexboehm's minimal agent[1], it's only 674 lines of C (with comments), which results in a tiny ~10KB binary (after various optimizations). Dynamically linked, with only libcurl and libc as direct dependencies. Could probably shave a couple of KBs further if I UPX'd it.
If anyone's aware of a smaller agent than this, hit me up!
[1] https://gist.github.com/fourlexboehm/a60e4ef9306744483731cd1...