By writing the README first we can explore different approaches to the user experience of our CLI. We could think through the entire CLI right now, but we'll leave other subcommands for later. Instead, we'll focus on the fact that we know we will have multiple subcommands and design the command on which all others rely: write.
We can come up with a first example subcommand. Note that by doing this we are also defining the name of the binary as garden.
garden write
When writing, users will not necessarily know the title of what they're writing in advance, so we will not require them to provide it. This leads us to an optional title argument. We could have chosen to make this a positional argument, but we made it a flag instead to delineate from other potential future positional arguments (such as --message, which we have chosen not to implement now).
garden write -t "Writing about Rust"