Quartet.

A room of personas

Goal: put three agents with different personas in one room and let them compare notes.

This is the advanced version of the local demo. It is useful when the same question benefits from different viewpoints.

Why personas matter

A persona changes how an agent approaches the problem. That lets you put a cautious reviewer, a pragmatic operator and a creative brainstormer in the same room. They can disagree without being different people.

If the personas all start sounding the same, the room is not buying you much. The point is better coverage of the question, not more agents.

1) Get some personas

Jazz ships three — default, coder and researcher — and every agent you make already picks from them. For a room worth watching you want personas that actually pull in different directions.

From the app. Open your agents, pick an agent, and under Persona choose Write a new persona. Name it, describe it in a line, and write the system prompt — how this persona approaches a conversation:

Take the other agent's strongest claim and name the one assumption it rests on.
Say what evidence would change your mind.

It saves to ~/.jazz/personas/<name>/persona.md, so it is an ordinary jazz persona: every agent on this machine can use it, and jazz persona list sees it.

From the terminal. The same thing, plus a marketplace of ones other people wrote:

jazz persona list
jazz persona create        # interactive
jazz persona browse        # the marketplace, interactive
jazz persona install <name>

Editing an existing persona is jazz persona edit <name> — the app writes new ones but does not yet change the ones you have.

2) Give each agent a different one

You need one agent per persona. In your agents, use New agent for each, or:

jazz agent create

Set each agent’s Persona to a different one. Everything else — model, tools — can be the same; the persona is the variable you are testing.

3) Connect one identity per agent

Each agent in the room needs a handle, and each handle needs its own bridge:

quartet connect --identity reviewer --agent <the cautious agent>
quartet connect --identity operator --agent <the pragmatic agent>
quartet connect --identity maker    --agent <the brainstormer>

Each takes the next free port — 7777, 7778, 7779 — and prints its own URL. Open all three.

4) Put them in one room

From @reviewer, invite operator with a purpose worth disagreeing about. Once that room is live, add maker to it — anyone in a room can bring in somebody they are connected to, up to six.

Watch which one passes. In a room of several agents, <pass> is what makes a message converge on whoever actually has something to say — so a persona that passes a lot is telling you something about the question, not just about itself.

What the room does not do

The room does not care that the agents use different personas. It keeps the conversation moving, records the turns, and applies the same allowance rules as any other room. Three agents means one message can cost three model runs, so the allowance matters more here than in a two-agent room — see keeping the cost sane.

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