opencode-devbox/README.md

# opencode-devbox

Portable AI developer environment in a Docker container. Run [opencode](https://opencode.ai) on any Docker-capable machine with configurable LLM providers, dev tools, and host filesystem access.

## Why?

The official `ghcr.io/anomalyco/opencode` image (now archived) was Alpine-based and minimal — no git, no dev tools, broken PTY support due to musl/glibc incompatibility. This project provides a **Debian-based, production-ready** alternative using the current v1.x release.

## Quick Start

```bash
# Clone
git clone ssh://gitea.jordbo.se:2222/joakimp/opencode-devbox.git
cd opencode-devbox

# Configure
cp .env.example .env
# Edit .env with your provider, API key, workspace path, git config

# Install git hooks (secret scanning)
brew install gitleaks  # macOS / Linuxbrew
./setup-hooks.sh

# Build and run
docker compose run --rm devbox
```

## Features

- **Debian bookworm** base — glibc, full PTY/terminal support
- **Configurable providers** — Anthropic, OpenAI, AWS Bedrock via env vars
- **Host filesystem access** — bind mount any directory as `/workspace`
- **SSH key forwarding** — git push/pull to private repos
- **MCP server support** — Node.js included for `npx`-based MCP servers
- **Non-root user** — runs as `developer` with UID auto-matched to workspace owner (sudo available)
- **Optional runtimes** — Python, Go via build args (Node.js always included — required for opencode v1.x)
- **Multi-agent orchestration** — optional [oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) integration via build arg
- **AWS CLI v2** — built-in SSO/Bedrock authentication with headless device-code flow
- **Multi-arch** — amd64 and arm64

## Usage

### Connecting to the container

From your laptop, SSH into the remote server where Docker is running, then start the container:

```bash
# 1. SSH into the remote server
ssh user@remote-server

# 2. Navigate to the project
cd opencode-devbox

# 3. Start the container with an interactive shell
docker compose run --rm devbox bash

# You're now inside the container — run commands here
aws sso login --sso-session <your-sso-session> --use-device-code
opencode
```

### Running modes

**Interactive shell** — enter the container, run multiple commands:
```bash
docker compose run --rm devbox bash
```

**Direct to opencode** — skips the shell, launches opencode immediately:
```bash
docker compose run --rm devbox
```

**Background container** — keep it running, attach when needed:
```bash
# Start in background
docker compose up -d

# Attach a shell to the running container
docker compose exec -u developer devbox bash

# Or run a single command inside it
docker compose exec -u developer devbox aws --version
```

> `run` creates a new container (cleaned up with `--rm`). `exec` attaches to an already running one.

## Configuration

### Environment Variables

| Variable | Description | Default |
|---|---|---|
| `OPENCODE_PROVIDER` | LLM provider (`anthropic`, `openai`, `amazon-bedrock`) | `anthropic` |
| `OPENCODE_MODEL` | Model override | Provider default |
| `ANTHROPIC_API_KEY` | Anthropic API key | — |
| `OPENAI_API_KEY` | OpenAI API key | — |
| `AWS_REGION` | AWS region for Bedrock | `us-east-1` |
| `AWS_PROFILE` | AWS SSO profile name | `default` |
| `GIT_USER_NAME` | Git commit author name | — |
| `GIT_USER_EMAIL` | Git commit author email | — |
| `WORKSPACE_PATH` | Host path to mount | `.` |
| `SSH_KEY_PATH` | Host SSH key directory | `~/.ssh` |
| `USER_UID` | Override container user UID | Auto-detect from `/workspace` |
| `USER_GID` | Override container user GID | Auto-detect from `/workspace` |
| `ENABLE_OMOS` | Enable oh-my-opencode-slim multi-agent orchestration | `false` |
| `OMOS_TMUX` | Enable tmux pane integration for OMOS | `false` |
| `OMOS_SKILLS` | Install OMOS recommended skills on first run | `true` |
| `OMOS_RESET` | Force regenerate OMOS config on next start | `false` |

### Custom opencode config

Mount your own `opencode.json` for full control (MCP servers, custom models, etc.):

```yaml
volumes:
  - ./my-opencode.json:/home/developer/.config/opencode/opencode.json:ro
```

### Custom skills

Mount your host's opencode skills into the container:

```yaml
volumes:
  - ~/.config/opencode/skills:/home/developer/.config/opencode/skills:ro
  - ~/.agents/skills:/home/developer/.agents/skills:ro
```

### Rebuilding the Image

`docker compose run` and `docker compose up` use the existing image — they **do not rebuild** when you change the Dockerfile or build args (e.g. updating `OPENCODE_VERSION`). Rebuild explicitly:

```bash
# Rebuild then run
docker compose build
docker compose run --rm devbox

# Or rebuild and run in one step
docker compose run --rm --build devbox
```

### Build Args

Enable optional language runtimes or pin a specific opencode version:

```bash
docker compose build --build-arg INSTALL_PYTHON=true --build-arg INSTALL_GO=true
docker compose build --build-arg OPENCODE_VERSION=1.5.0
```

| Arg | Default | Description |
|---|---|---|
| `INSTALL_PYTHON` | `false` | Python 3 + pip + venv |
| `INSTALL_GO` | `false` | Go toolchain |
| `INSTALL_OMOS` | `false` | [oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) multi-agent orchestration (installs Bun, tmux, and plugin) |
| `OMOS_VERSION` | `latest` | Pin a specific oh-my-opencode-slim version |

## oh-my-opencode-slim (Multi-Agent Orchestration)

[oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) adds a multi-agent layer on top of opencode — an Orchestrator delegates tasks to specialized agents (Explorer, Oracle, Librarian, Designer, Fixer), each configurable with different models and providers.

### Setup

A pre-built OMOS image is available on Docker Hub as `joakimp/opencode-devbox:latest-omos`. Alternatively, build from source:

**1. Build the image with OMOS support:**

```bash
docker compose build --build-arg INSTALL_OMOS=true
```

This installs Bun, tmux, and the oh-my-opencode-slim package into the image.

**2. Enable in `.env`:**

```bash
ENABLE_OMOS=true
```

**3. Run as normal:**

```bash
docker compose run --rm devbox
```

On first start, the entrypoint runs the oh-my-opencode-slim installer in non-interactive mode. It generates agent configuration at `~/.config/opencode/oh-my-opencode-slim.json` inside the container. The default preset uses OpenAI models — edit the generated config or mount your own to customize.

### OMOS Environment Variables

| Variable | Default | Description |
|---|---|---|
| `ENABLE_OMOS` | `false` | Activate oh-my-opencode-slim on container start |
| `OMOS_TMUX` | `false` | Enable tmux pane integration (tmux is included with `INSTALL_OMOS`) |
| `OMOS_SKILLS` | `true` | Install recommended skills (simplify, agent-browser, cartography) |
| `OMOS_RESET` | `false` | Force regenerate config on next start (backs up existing config) |

### Custom Configuration

You can mount your own oh-my-opencode-slim config instead of using the auto-generated one:

```yaml
volumes:
  - ./oh-my-opencode-slim.json:/home/developer/.config/opencode/oh-my-opencode-slim.json:ro
```

The config file controls which models power each agent, fallback chains, council setup, and more. See the [oh-my-opencode-slim configuration docs](https://github.com/alvinunreal/oh-my-opencode-slim/blob/master/docs/configuration.md) for the full reference.

### Verifying Agents

After starting opencode with OMOS enabled, run inside the opencode session:

```
ping all agents
```

All six agents should respond if your provider authentication is working.

## AWS Bedrock Authentication

When using AWS Bedrock as your LLM provider, you need:

### 1. AWS config on the host

The container needs access to your `~/.aws/config` with SSO session configuration. If you already have this on another machine, copy it:

```bash
scp -r user@other-machine:~/.aws ~/.aws
```

Or configure from scratch on the host:

```bash
aws configure sso
```

### 2. Mount `~/.aws` into the container

Uncomment the AWS volume mount in `docker-compose.yml`:

```yaml
- ~/.aws:/home/developer/.aws
```

Note: do **not** use `:ro` — SSO writes token cache files to this directory.

### 3. Authenticate inside the container

Since the container runs headless (no browser), use the device-code flow:

```bash
# Start the container
docker compose up -d
docker compose exec -u developer devbox bash

# Authenticate — prints a URL and code you open in your local browser
aws sso login --sso-session <your-sso-session> --use-device-code

# Once approved in the browser, start opencode
opencode
```

The `--use-device-code` flag outputs a URL and short code instead of trying to open a browser. Copy the URL into any browser (on your laptop, phone, etc.), enter the code, and complete the 2FA flow. The CLI in the container picks up the session automatically.

SSO sessions typically last 8–12 hours before requiring re-authentication. Since `~/.aws` is mounted from the host, tokens persist across container restarts.

## Secret Scanning

A [gitleaks](https://github.com/gitleaks/gitleaks) pre-commit hook prevents accidentally committing API keys, passwords, or other secrets.

### Setup

```bash
# macOS / Linuxbrew
brew install gitleaks

# Debian/Ubuntu (download binary)
curl -sSL https://github.com/gitleaks/gitleaks/releases/latest/download/gitleaks_$(uname -s)_$(uname -m).tar.gz | sudo tar -xz -C /usr/local/bin gitleaks
```

The hook runs automatically on every `git commit`. If gitleaks isn't installed, the hook prints a warning and allows the commit (no hard dependency on collaborators).

### Bypass

For legitimate cases (test data, documentation with example keys):

```bash
git commit --no-verify -m "Add test fixtures"
```

### Configuration

Allowlisted paths and rules are in `.gitleaks.toml`. The defaults extend gitleaks' built-in rules and allow `.env.example` and documentation files.

## Architecture

```
Host Machine
├── ~/projects/my-app  ──bind mount──▶  /workspace (container)
├── ~/.ssh             ──bind mount──▶  /home/developer/.ssh (ro)
├── ~/.aws             ──bind mount──▶  /home/developer/.aws (Bedrock SSO)
└── .env               ──env vars───▶  provider config + API keys

Container (Debian bookworm)
├── opencode binary
├── oh-my-opencode-slim (optional — multi-agent orchestration plugin, includes Bun + tmux)
├── AWS CLI v2 (SSO + Bedrock auth)
├── git, ssh, ripgrep, fd, jq, curl, fzf
├── Node.js (for MCP servers)
├── Bun (optional — included with oh-my-opencode-slim)
├── tmux (optional — included with oh-my-opencode-slim, also useful independently)
├── entrypoint.sh (UID adjustment, git config, provider setup)
└── /workspace ← your code lives here
```

### Data persistence

| Path in container | Source | Survives `--rm`? | Contains |
|---|---|---|---|
| `/workspace` | Host bind mount | ✅ Yes | Your project files |
| `/home/developer/.ssh` | Host bind mount (ro) | ✅ Yes | SSH keys |
| `/home/developer/.aws` | Host bind mount (if configured) | ✅ Yes | AWS credentials/SSO cache |
| `/home/developer/.local/share/opencode` | Named volume `devbox-data` | ✅ Yes | Session history, memory |
| `/home/developer/.config/opencode/opencode.json` | Generated by entrypoint | ❌ No | Provider/model config |
| `/home/developer/.config/opencode/oh-my-opencode-slim.json` | Generated by entrypoint (if OMOS enabled) | ❌ No | Agent/model mappings |

**opencode config** (`opencode.json`) is auto-generated from `OPENCODE_PROVIDER` on each start. It sets provider and model only — no MCP servers. To use MCP servers or custom settings, mount your own config file (see Custom opencode config above).

## License

MIT