cli-agents 0.2.3

Build agentic apps over users' existing AI subscriptions (Claude, Codex, Gemini)
Documentation 
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---
title: cli-agents
description: Build agentic apps on top of your users' existing AI subscriptions
generated: true
---

# cli-agents

Build agentic apps on top of your users' existing AI subscriptions.

Instead of requiring API keys or managing token costs, `cli-agents` spawns the AI CLI tools users already have installed — Claude Code, Codex, or Gemini CLI — and provides a unified Rust interface for streaming events, tool calls, cancellation, and structured results. Your app brings the UX; the user brings their own subscription.

## Key features

- **Single API** — `run()` works with any supported CLI backend
- **Auto-discovery** — finds installed CLIs in PATH, nvm, homebrew, and common install locations
- **Streaming events** — unified `StreamEvent` enum for text, thinking, tool calls, errors, and completion across all providers
- **Timeouts & guardrails** — idle timeout, total timeout, and consecutive tool-failure limits with automatic cancellation
- **MCP support** — configure Model Context Protocol servers for all adapters
- **Async / Tokio** — fully async with cancellation via `CancellationToken`

## Quick example

```rust
use cli_agents::{run, RunOptions, StreamEvent, CliName};
use std::sync::Arc;

#[tokio::main]
async fn main() {
    let opts = RunOptions {
        cli: Some(CliName::Claude),
        task: "List all public functions in src/lib.rs".into(),
        cwd: Some("./my-project".into()),
        skip_permissions: true,
        ..Default::default()
    };

    let handle = run(opts, Some(Arc::new(|event: StreamEvent| {
        match &event {
            StreamEvent::TextDelta { text } => print!("{text}"),
            StreamEvent::Done { result } => println!("\nDone: {:?}", result.success),
            _ => {}
        }
    })));

    let result = handle.result.await.unwrap().unwrap();
    println!("Success: {}", result.success);
}
```

## Why cli-agents?

AI APIs require API keys and charge per token. Most developers already pay for Claude Pro, ChatGPT Plus, or Gemini — and those subscriptions come with CLI tools. `cli-agents` lets you build desktop apps, dev tools, and automation that run on the user's existing subscription with zero API cost to you.

This is especially powerful for **Tauri desktop apps**: your Rust backend spawns the agent, streams events to the frontend, and the user's own subscription handles the AI — no API keys to configure, no billing to manage.

## Platform support

| Platform | Status |
|----------|--------|
| macOS (ARM64, x64) | Fully tested end-to-end |
| Linux (x64, ARM64) | Compiles and passes unit tests in CI |
| Windows (x64) | Compiles and passes unit tests in CI — Unix-specific APIs need platform implementations |