Extending Cargo with Custom Commnads

The design of Cargo is such that you can extend it with new subcommands without having to modify Cargo.

If a binary in your $PATH is named cargo-somethig, you can run it as if it was a Cargo subcommand by running cargo something.

Custom commands like this are also listed when you run cargo --list

Using cargo install to install extensions and then run them just like built-in Cargo tools is a very convenient benefit of Cargo's design.