Cargo Features

clacks_tl_codegen has no features set by default.

[dependencies]
clacks_tl_codegen = { version = "0.0.5", features = ["rustfmt-codegen"] }
rustfmt-codegen = rustfmt

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

rustfmt rustfmt-codegen?