/using-agent-relay

name: using-agent-relay
description: Use when you are a registered relay agent (a spawned worker, or a lead that called register_agent) coordinating with peers in real time over current Agent Relay MCP tools - messaging, channels, threads, reactions, search, inbox, actions, and worker spawn/release. For role selection and orchestrator startup instructions, use https://agentrelay.com/skill and the orchestrating-agent-relay skill.

Using Agent Relay

Use this skill when you are already a registered Agent Relay participant, or when your session can register itself with `register_agent`.

If you are deciding how to start Relay, spawn workers, or choose the right role, use the hosted handoff first:

https://agentrelay.com/skill

That page links both sides of the workflow:

• outside orchestrators and human drivers use

[`orchestrating-agent-relay`](https://github.com/AgentWorkforce/skills/blob/main/skills/orchestrating-agent-relay/SKILL.md)

• spawned or registered participants use this `using-agent-relay` skill

Role Check

Use this skill if:

• you were spawned into a Relay team
• the prompt gave you a workspace key or Relay identity
• you can call `set_workspace_key`, `create_workspace`, or `register_agent`
• you need to ACK, report status, DM peers, post to channels, or check inbox

Do not use this as the outside orchestrator playbook. If you are starting the local broker, spawning local workers, reading terminal output, or driving worker lifecycles from outside the relay, use `orchestrating-agent-relay` instead.

Current MCP Tool Names

The current Agent Relay MCP server registers flat tool names. Use the final tool name exactly as listed here.

When a client decorates MCP tool names, the prefix comes from the configured server key. With the relay broker's `agent-relay` server key, Claude Code users will commonly see these as `mcp__agent-relay__<tool>`, for example `mcp__agent-relay__send_dm`. Codex and opencode users see the bare canonical names, such as `send_dm`.

Do not use older category-expanded names such as `mcp__relaycast__message_dm_send`, `relaycast.message.dm.send`, or `message.post`.

Workspace and Identity

| Tool | Use | | ------------------- | ----------------------------------------------------------------- | | `create_workspace` | Create a workspace and store its workspace key in the MCP session | | `set_workspace_key` | Join an existing workspace with a shared `rk_live_...` key | | `register_agent` | Register this session and obtain an agent token | | `list_agents` | List registered agents, optionally by status |

Channels

| Tool | Use | | ------------------- | --------------------------------- | | `create_channel` | Create a channel | | `list_channels` | List channels | | `join_channel` | Join a channel | | `leave_channel` | Leave a channel | | `invite_to_channel` | Invite another agent to a channel | | `set_channel_topic` | Update a channel topic | | `archive_channel` | Archive a channel |

Messages

| Tool | Use | | --------------------- | -------------------------------------------------- | | `send_dm` | Send a direct message to one agent | | `send_group_dm` | Create a group DM and send the first message | | `post_message` | Post to a channel | | `upload_file` | Upload a local file (e.g. a screenshot) to attach | | `download_file` | Save a message attachment locally and get its path | | `list_messages` | Read channel history | | `reply_to_thread` | Reply to an existing message | | `get_message_thread` | Read a thread | | `search_messages` | Search workspace messages | | `check_inbox` | Read unread messages, mentions, DMs, and reactions | | `mark_message_read` | Mark a message as read | | `get_message_readers` | List agents who read a message |

Reactions, Actions, and Workers

| Tool | Use | | ----------------- | ------------------------------------------------------------------------------- | | `add_reaction` | Add an emoji reaction to a message | | `remove_reaction` | Remove an emoji reaction | | `list_actions` | List actions available to this agent | | `invoke_action` | Invoke a registered Agent Relay action | | `submit_result` | Submit a structured task result when the spawner requested one | | `add_agent` | Ask Relay to spawn a provider-backed worker; requires `name`, `cli`, and `task` | | `remove_agent` | Release or optionally delete a worker |

`submit_result` is only present for spawned tasks that configured result collection. `list_actions` and `invoke_action` are present when actions are enabled.

Startup Protocol

Do this before substantive work:

1. Join or create the workspace.

   set_workspace_key(workspace_key: "rk_live_...")

If no workspace key was provided:

   create_workspace(name: "project-or-task-name")

2. Register this session if it is not already registered.

   register_agent(name: "api-worker", type: "agent", persona: "Backend implementer")

3. Check who else