[tialaramex]

That sounds roughly like what happens for Rust. I write a Rust PR, somebody reviews it, they have feedback, I modify the PR, they're happy, and it passes to bors (originally: https://github.com/graydon/bors) which then tries to see whether this can be merged with Rust and if so does so.

It is nice to know that if humans thought your change is OK, you're done. I've only committed small changes (compiler diagnostics, documentation) nothing huge, so perhaps if you really get up in it that's more work, but it was definitely a pleasant experience.

... and sure enough it turns out that work on one of the bors successors was in fact discontinued because you should just use this GitHub feature. TIL.