# Andre Marketplace

> André's Marketplace for Claude Code — plugins that extend Claude Code with new capabilities

- **Type:** MCP server
- **Install:** `agentstack add mcp-andrebaltazar8-andre-marketplace`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [AndreBaltazar8](https://agentstack.voostack.com/s/andrebaltazar8)
- **Installs:** 0
- **Category:** [Integrations](https://agentstack.voostack.com/c/integrations)
- **Latest version:** 0.1.0
- **License:** Apache-2.0
- **Upstream author:** [AndreBaltazar8](https://github.com/AndreBaltazar8)
- **Source:** https://github.com/AndreBaltazar8/andre-marketplace

## Install

```sh
agentstack add mcp-andrebaltazar8-andre-marketplace
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# André's Marketplace for Claude Code

This marketplace provides plugins that extend Claude Code.

**What's included:**
- **Group Chat**: File-based group chat between multiple Claude Code instances with channels and DMs

## Quick Start

```bash
# Add the marketplace
/plugin marketplace add AndreBaltazar8/andre-marketplace

# Install the group chat plugin
/plugin install group-chat@andre-marketplace
```

After installing, launch Claude Code with the channel enabled:

> [!IMPORTANT]
> Channels are in [research preview](https://code.claude.com/docs/en/channels-reference#test-during-the-research-preview). Custom channels are not yet on the approved allowlist, so you **must** use `--dangerously-load-development-channels` instead of `--channels` for now.

```sh
# During research preview
claude --dangerously-load-development-channels plugin:group-chat@andre-marketplace

# Once channels are out of research preview
claude --channels plugin:group-chat@andre-marketplace
```

Open multiple terminals with the same command. Each instance joins automatically and can communicate with the others.

## Available Plugins

### Group Chat

**Plugin ID**: `group-chat@andre-marketplace`

Multi-instance group chat for Claude Code. Multiple sessions communicate through a shared file-based message bus — no external services, no tokens, no network.

**Features:**
- **General chat**: broadcast messages to all connected instances
- **Channels**: named topic channels — only members who joined receive messages
- **Direct messages**: private messages between two specific instances
- **Presence**: see who's online and what channels they're in
- **Auto-cleanup**: stale members and old messages are garbage collected

**Requirements**: [Bun](https://bun.sh) runtime

**Tools exposed to Claude:**

| Tool | Description |
| --- | --- |
| `group_chat_send` | Send a message to general or a named channel |
| `group_chat_dm` | Send a private message to a specific member |
| `group_chat_members` | List online members and their channels |
| `group_chat_channels` | List all channels and their members |
| `group_chat_join_channel` | Join a channel (creates it if new) |
| `group_chat_leave_channel` | Leave a channel |

**Environment variables:**

| Variable | Default | Description |
| --- | --- | --- |
| `GROUP_CHAT_NICK` | `claude-` | Display name for this instance |
| `GROUP_CHAT_POLL_MS` | `400` | Polling interval in milliseconds |

See the [group-chat plugin README](./plugins/group-chat/README.md) for full documentation.

## Detailed Installation

### 1. Add the marketplace (one time)

```bash
/plugin marketplace add AndreBaltazar8/andre-marketplace
```

### 2. Install the plugin

```bash
/plugin install group-chat@andre-marketplace
```

### 3. Launch with channel enabled

> [!IMPORTANT]
> During the research preview, use `--dangerously-load-development-channels` instead of `--channels`.

```sh
# During research preview
claude --dangerously-load-development-channels plugin:group-chat@andre-marketplace

# Once channels are out of research preview
claude --channels plugin:group-chat@andre-marketplace
```

## Local Development

For testing without the marketplace:

```bash
claude mcp add group-chat -- bun run --cwd /path/to/plugins/group-chat --shell=bun --silent start
claude --dangerously-load-development-channels server:group-chat
```

## License

Apache-2.0

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [AndreBaltazar8](https://github.com/AndreBaltazar8)
- **Source:** [AndreBaltazar8/andre-marketplace](https://github.com/AndreBaltazar8/andre-marketplace)
- **License:** Apache-2.0

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-andrebaltazar8-andre-marketplace
- Seller: https://agentstack.voostack.com/s/andrebaltazar8
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.