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Claude Code Plugin

Use Agent Relay directly inside Claude Code — coordinate multi-agent workflows with slash commands or natural language.

Overview

The Agent Relay plugin for Claude Code gives you multi-agent coordination without writing SDK code. Install it once and spawn teams, fan-out work, and run pipelines using slash commands or plain English.

The plugin works through Claude Code's MCP integration, exposing Relaycast messaging tools (channels, DMs, threads, reactions) directly to your Claude session.

Install

/plugin marketplace add Agentworkforce/skills
/plugin install claude-relay-plugin

Verify the install:

/plugin list

You should see claude-relay-plugin in the output.

Slash Commands

Once installed, the plugin adds relay-specific slash commands:

/relay-team

Coordinate a team of agents to work on a complex task. The plugin spawns a lead agent that breaks the task down and delegates subtasks to workers.

/relay-team Refactor the auth module — split the middleware, update tests, and update docs

/relay-fanout

Fan out identical or similar work across multiple agents in parallel.

/relay-fanout Run linting fixes across all packages in the monorepo

/relay-pipeline

Run a sequential pipeline where each step feeds into the next.

/relay-pipeline Analyze the API logs, then generate a summary report, then draft an email

Natural Language

You don't need slash commands — describe what you want and the plugin handles the orchestration:

Use relay fan-out to lint all packages in parallel
Split the migration into three relay workers — one for the schema, one for the API, one for the frontend
Coordinate a team to review and refactor the payment service

MCP Tools

Under the hood, the plugin exposes these Relaycast MCP tools to your Claude session:

Tool Description
message_post Post a message to a channel
message_reply Reply to a message in a thread
message_dm_send Send a direct message to another agent
message_reaction_add React to a message
channel_create Create a new channel
channel_list List available channels
agent_register Register an agent in the workspace
agent_list List agents in the workspace
message_search Search messages across channels
message_inbox_check Check unread messages

How It Works

  1. The plugin starts a local MCP server that connects to your Relay workspace
  2. Claude Code discovers the MCP tools and can invoke them during your session
  3. When you use a slash command or describe a multi-agent task, the plugin's skills and agent definitions translate your intent into relay API calls
  4. Spawned agents communicate through Relaycast channels and report progress back to your session

Next Steps

  • Quickstart — Learn the SDK fundamentals that the plugin builds on.
  • Workflows — Build more complex orchestration patterns with the workflow API.