Supports Claude Code, Codex, Pi, and Amp.
This is not a fork (and never will be).
It's powered by Sandbox Agent SDK's wizardry.
Experimental & just for fun.
Issues — Discord — Supported OpenCode Features
## How It Works
```
┌─ Gigacode ────────────────────────────────────────────────────────┐
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ OpenCode TUI │───▶│ Sandbox Agent │───▶│ Claude Code / │ │
│ │ │ │ │ │ Codex / Pi / Amp │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
└───────────────────────────────────────────────────────────────────┘
```
- [Sandbox Agent SDK](https://sandboxagent.dev) provides a universal HTTP API for controlling Claude Code, Codex, Pi, and Amp
- Sandbox Agent SDK exposes an [OpenCode-compatible endpoint](https://sandboxagent.dev/docs/opencode-compatibility) so OpenCode can talk to any agent
- OpenCode connects to Sandbox Agent SDK via [`attach`](https://opencode.ai/docs/cli/#attach)
## OpenCode Models vs Gigacode Agents
- **OpenCode** supports **switching between inference providers** (Anthropic, OpenAI, etc.). This is OpenCode talking directly to the models with its own tools, system prompts, and agentic loop.
- **Gigacode** automates other coding agent harnesses, so it's using the **exact same logic that you would if you ran Claude Code**, Codex, Pi, or Amp natively.
```
OpenCode (native): Model → OpenCode's tool loop → result
Gigacode: Model → Claude Code / Codex / Pi / Amp CLI → result
```
This means you get each agent's specialized capabilities (such as Claude Code's `Read`/`Write`/`Bash` tools, Codex's sandboxed execution, and Amp's permission rules) rather than a single tool loop with different models behind it.
## Install
**macOS / Linux / WSL (Recommended)**
```bash
curl -fsSL https://releases.rivet.dev/sandbox-agent/latest/gigacode-install.sh | sh
```
**npm i -g**
```bash
npm install -g @sandbox-agent/gigacode
gigacode --help
```
**bun add -g**
```bash
bun add -g @sandbox-agent/gigacode
# Allow Bun to run postinstall scripts for native binaries.
bun pm -g trust @sandbox-agent/gigacode-linux-x64 @sandbox-agent/gigacode-linux-arm64 @sandbox-agent/gigacode-darwin-arm64 @sandbox-agent/gigacode-darwin-x64 @sandbox-agent/gigacode-win32-x64
gigacode --help
```
**npx**
```bash
npx @sandbox-agent/gigacode --help
```
**bunx**
```bash
bunx @sandbox-agent/gigacode --help
```
> **Note:** Windows is unsupported. Please use [WSL](https://learn.microsoft.com/en-us/windows/wsl/install).
## Usage
**TUI**
Launch the OpenCode TUI with any coding agent:
```bash
gigacode
```
**Web UI**
Use the [OpenCode Web UI](https://sandboxagent.dev/docs/opencode-compatibility) to control any coding agent from the browser.
**OpenCode SDK**
Use the [`@opencode-ai/sdk`](https://sandboxagent.dev/docs/opencode-compatibility) to programmatically control any coding agent.