CLI Arguments Generator in Rust

What You'll Build

You'll build a universal command-line companion that understands natural-language requests and turns them into the exact arguments for the tool you're already using. Say "drop the last commit" while invoking it for Git and it proposes git reset --soft HEAD^, ready to run.

The utility works as a plus-suffixed wrapper you can call alongside your everyday commands (think git+, ffmpeg+, rg+), always showing a clear preview and asking for confirmation before executing. It makes powerful actions quick, transparent, and safe.

Learning Objectives

Set up a Rust project with async capabilities
Parse command-line arguments using the plus-suffix convention
Craft and fill a prompt template for an LLM
Integrate with an OpenAI-compatible API via the rig crate
Split LLM output into shell-safe arguments
Spawn and manage child processes asynchronously
Propagate exit codes for correct pipeline behavior
Add an interactive confirmation dialog for safety

Prerequisites

Basic Rust syntax (structs, impl blocks, Result)
Familiarity with Cargo and dependencies
Understanding of async/await concepts
Basic command-line experience

Course curriculum

1 Binary Setup and Parsing

Initialize CLI App
Extract Command Name

2 Prompt to Parameters

Add Prompt Template
Fill Prompt Template
Send Prompt to Model

3 Confirm Command Execution

Confirm Command
Execute Confirmed Command

4 Release Build and Alias

Install Release Binary
Run the Tool

Technologies

Rust CLI LLM OpenAI Prompt Engineering Async Tokio Process Management Shell Parsing Code Generation

Read the concepts behind this playground

FAQ

Is this a video course?

No. You implement the project yourself, step by step, right in your browser — with a full reference solution for every step when you get stuck.

Do I need to install anything?

No. The playground runs entirely in your browser — no toolchain or local setup required.

Can I try it before subscribing?

Yes. Preview steps are available without a subscription so you can see the format and quality first.

What do I get with full access?

Every step unlocked, the Workbench app, a snapshot for each step, jump-to-any-step navigation, and all new playground releases.

Does it work with an AI agent like Claude or Codex?

Yes. You can work through a playground solo or alongside an AI agent.

Is there reference code?

Yes. Every step has a complete reference solution you can compare against.