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Description

Sometimes I wish I had an description field for documenting what each target it is a more human-friendly way.

tar_target(
  name,
  command,
  description = "a field where we can briefly describe the target",
)

One could write a code comment, but this approach would be better because it could show up in tar_manifest(). It would also help generate READMEs.

Arguably, we should make the commands into simple functions and document those functions, but the trouble I have is having several end-products and recalling what they are.