CLI Tools

The mental model behind idiomatic Rust CLIs - declarative argument parsing with clap, exit codes as a contract with the shell, and ownership concerns in terminal I/O.

Anatomy of a good Rust CLI.

Derive-based args, subcommands, and validation.

Layering flags, env vars, and config files.

`indicatif` progress bars and colored output.

Interactive terminal user interfaces.

`anyhow`/`miette` for friendly CLI errors.

Generating from your `clap` definitions.

`cargo-dist`, binaries, and installers.

Discoverable, scriptable, fast tools.