crab-code

Name: crab-code
Author: lingcoder

lingcoder April 2, 2026

31 copies 0 downloads

🦀 Open-source alternative to Claude Code, built from scratch in Rust. Agentic coding CLI — thinks, plans, and executes with any LLM. Compatible with Claude Code workflows.

Agent Definition

<div align="center">

<img src="assets/logo-horizontal.svg" width="360" alt="Crab Code" />

**Open-source alternative to Claude Code, built from scratch in Rust.**

*Inspired by Claude Code's agentic workflow -- open source, Rust-native, works with any LLM.*

[![Rust](https://img.shields.io/badge/Built%20with-Rust-orange?logo=rust)](https://www.rust-lang.org/)
[![License](https://img.shields.io/badge/License-Apache--2.0-blue.svg)](LICENSE)
[![CI](https://github.com/lingcoder/crab-code/actions/workflows/ci.yml/badge.svg)](https://github.com/lingcoder/crab-code/actions/workflows/ci.yml)
[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](#contributing)

**English** | [**中文**](README.zh-CN.md)

</div>

---

> **Status: Active Development** -- 49 built-in tools, 6 permission modes, extended thinking, multi-agent coordination, structured message TUI with 187 spinner verbs, 3900+ tests across 17 crates, 110k+ LOC. Zero `todo!()` macros.

## What is Crab Code?

[Claude Code](https://docs.anthropic.com/en/docs/claude-code) pioneered the agentic coding CLI -- an AI that doesn't just suggest code, but thinks, plans, and executes autonomously in your terminal.

**Crab Code** brings this experience to the open-source world, independently built from the ground up in Rust:

- **Fully open source** -- Apache 2.0, no feature-gating, no black box
- **Rust-native performance** -- instant startup, minimal memory, no Node.js overhead
- **Model agnostic** -- DeepSeek, GPT, DeepSeek, Qwen, Ollama, or any OpenAI-compatible API
- **Secure** -- 6 permission modes (default, acceptEdits, dontAsk, bypassPermissions, plan, auto)
- **MCP compatible** -- stdio, SSE, and WebSocket transports
- **Claude Code aligned** -- CLI flags, slash commands, tools, and workflows match Claude Code behavior

## Quick Start

```bash
git clone https://github.com/lingcoder/crab-code.git
cd crab-code
cargo build --release

# Set your API key
export ANTHROPIC_API_KEY=sk-ant-...

# Interactive TU

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