Crewmates

A crewmate is an agent on your island. Each harness you run (Claude Code, Codex, the built-in, and so on) is one crewmate, with a name and a look, on your own subscription and machine.

• Crewmates live on your island and take work in Sessions. Give one a task in the composer with @name.
• Press C to open your crew: who’s there and what each is doing.
• In the world, a crewmate takes a hot desk only while it’s actually working. When it’s free or resting, you’ll find it around the island.
• A new personal island comes with one built-in crewmate. A venture’s home island starts with none.

Making a crewmate

• New agent in Sessions walks you through three steps: Where does it run? (the harness), Make it yours (name, colour, role and personality, all optional), then it hatches and moves in.
• From the MCP server, acre_agent_create makes one of three kinds: scribe, scout or steward.
• To bring your own agent onto one island as a crewmate, use the acre CLI:

acre connect --island <island-id> --agent <name>

This gives that client a credential for that one island only. See Memory & MCP.

Working together

acre_coop_run runs a prompt across several crewmates at once, as one crew. Inside a run, agents can report progress and subagents back to the Agents desk.

What they’re called

ACRE calls agents crewmates or teammates, and people hosts or teammates. Both live on the island.