Domain Cli

Constrains Claude to follow CLI best practices when building command line tools in Rust. You get argument parsing with clap's derive macros, proper config precedence (CLI args beat env vars beat config files), and the critical stuff like errors to stderr and correct exit codes. The trace down pattern is actually useful here: it maps domain requirements like "need progress display" directly to indicatif's ProgressBar with RAII lifecycle management. Includes working patterns for subcommands, layered config, and interactive elements. Most valuable when you want Claude to respect Unix conventions and scriptability instead of inventing its own error handling.

skills.sh installs: 3.4K
GitHub stars: 1.6K
last updated: Aug 21, 2026

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Install

$ npx -y skills add actionbook/rust-skills --skill domain-cli --agent claude-code

Installs into .claude/skills of the current project.

Files

CLI Domain

Layer 3: Domain Constraints

Domain Constraints → Design Implications

Domain Rule	Design Constraint	Rust Implication
User ergonomics	Clear help, errors	clap derive macros
Config precedence	CLI > env > file	Layered config loading
Exit codes	Non-zero on error	Proper Result handling
Stdout/stderr	Data vs errors	eprintln! for errors
Interruptible	Handle Ctrl+C	Signal handling

Critical Constraints

User Communication

RULE: Errors to stderr, data to stdout
WHY: Pipeable output, scriptability
RUST: eprintln! for errors, println! for data

Configuration Priority

RULE: CLI args > env vars > config file > defaults
WHY: User expectation, override capability
RUST: Layered config with clap + figment/config

Exit Codes

RULE: Return non-zero on any error
WHY: Script integration, automation
RUST: main() -> Result<(), Error> or explicit exit()

Trace Down ↓

From constraints to design (Layer 2):

"Need argument parsing"
    ↓ m05-type-driven: Derive structs for args
    ↓ clap: #[derive(Parser)]

SKILL.md on GitHub

Details

Repository: github.com/actionbook/rust-skills
Categories: Rust, CLI & Terminal
First seen: May 16, 2026