When I come back to a project that I haven't touched in a while, I like to do something equivalent to
cargo clean && cargo build --all --all-targets as a way to get everything primed.
Is there a command I could do to get r-a ready to go as well, before I even open my editor?
You can theoretically start r-a before the editor and connect to it later
Also, r-a will run cargo check, so you can prime that manually
someday we'll get the sharing between check and build, sigh