domain-cli
Use when building CLI tools. Keywords: CLI, command line, terminal, clap, structopt, argument parsing, subcommand, interactive, TUI, ratatui, crossterm, indicatif, progress bar, colored output, shell completion, config file, environment variable, 命令行, 终端应用, 参数解析
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/actionbook/rust-skills --skill domain-cli- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads domain-cli automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
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)]
"Need config layering"
↓ m09-domain: Config as domain object
↓ figment/config: Layer sources
"Need progress display"
↓ m12-lifecycle: Progress bar as RAII
↓ indicatif: ProgressBar
Key Crates
| Purpose | Crate |
|---|---|
| Argument parsing | clap |
| Interactive prompts | dialoguer |
| Progress bars | indicatif |
| Colored output | colored |
| Terminal UI | ratatui |
| Terminal control | crossterm |
| Console utilities | console |
Design Patterns
| Pattern | Purpose | Implementation |
|---|---|---|
| Args struct | Type-safe args | #[derive(Parser)] |
| Subcommands | Command hierarchy | #[derive(Subcommand)] |
| Config layers | Override precedence | CLI > env > file |
| Progress | User feedback | ProgressBar::new(len) |
Code Pattern: CLI Structure
use clap::{Parser, Subcommand};
#[derive(Parser)]
#[command(name = "myapp", about = "My CLI tool")]
struct Cli {
/// Enable verbose output
#[arg(short, long)]
verbose: bool,
#[command(subcommand)]
command: Commands,
}
#[derive(Subcommand)]
enum Commands {
/// Initialize a new project
Init { name: String },
/// Run the application
Run {
#[arg(short, long)]
port: Option<u16>,
},
}
fn main() -> anyhow::Result<()> {
let cli = Cli::parse();
match cli.command {
Commands::Init { name } => init_project(&name)?,
Commands::Run { port } => run_server(port.unwrap_or(8080))?,
}
Ok(())
}
Common Mistakes
| Mistake | Domain Violation | Fix |
|---|---|---|
| Errors to stdout | Breaks piping | eprintln! |
| No help text | Poor UX | #[arg(help = "...")] |
| Panic on error | Bad exit code | Result + proper handling |
| No progress for long ops | User uncertainty | indicatif |
Trace to Layer 1
| Constraint | Layer 2 Pattern | Layer 1 Implementation |
|---|---|---|
| Type-safe args | Derive macros | clap Parser |
| Error handling | Result propagation | anyhow + exit codes |
| User feedback | Progress RAII | indicatif ProgressBar |
| Config precedence | Builder pattern | Layered sources |
Related Skills
| When | See |
|---|---|
| Error handling | m06-error-handling |
| Type-driven args | m05-type-driven |
| Progress lifecycle | m12-lifecycle |
| Async CLI | m07-concurrency |
FAQ
What does the domain-cli skill do?
Use when building CLI tools. Keywords: CLI, command line, terminal, clap, structopt, argument parsing, subcommand, interactive, TUI, ratatui, crossterm, indicatif, progress bar, colored output, shell completion, config file, environment variable, 命令行, 终端应用, 参数解析
How do I install domain-cli?
Run npx skills add https://github.com/actionbook/rust-skills --skill domain-cli in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/domain-cli/ (personal) or .claude/skills/domain-cli/ (project).
Which AI agents can use domain-cli?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is domain-cli safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains domain-cli?
It is published by actionbook in actionbook/rust-skills. It has 3,166 recorded installs.
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