Agent Teams Guide

Quick Reference

Enabling Agent Teams

Agent teams are experimental. Enable via environment variable:

{
  "env": {
    "CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS": "1"
  }
}

Or set the environment variable in your shell before running Claude Code.

Creating a Team

Start a team by describing parallel work that would benefit from multiple perspectives:

Create an agent team to explore this from different angles: one
teammate on UX, one on technical architecture, one playing devil's advocate.

Claude creates:

• A team lead (your main session)
• Teammates (separate Claude Code instances)
• A shared task list for coordination

Display Modes

In-Process Mode (Default)

• All teammates run in your main terminal
• Shift+Up/Down to select a teammate
• Type to message them directly
• Works in any terminal

Split-Pane Mode

• Each teammate gets its own pane
• Requires tmux or iTerm2
• Set teammateMode in settings.json:

{ "teammateMode": "in-process" }

• Override per session: claude --teammate-mode in-process

Controlling Teammates

Task Assignment

• Lead assigns explicitly: tell the lead which task goes to which teammate
• Self-claim: teammates pick unassigned, unblocked tasks automatically

Direct Communication

• In-process: Select teammate, type message, press Enter to view, Escape to interrupt
• Split-pane: Click into pane to interact directly

Delegate Mode

Prevents the lead from implementing tasks itself, keeping it focused on coordination:

1. Start a team first
2. Press Shift+Tab to cycle into delegate mode

Require Plan Approval

For complex tasks:

Spawn an architect teammate to refactor the authentication module.
Require plan approval before they make any changes.

Best Practices

Give Teammates Enough Context

Teammates don’t inherit lead’s conversation history. Include details in spawn prompt:

Spawn a security reviewer teammate with the prompt: "Review the authentication
module at src/auth/ for security vulnerabilities. Focus on token handling,
session management, and input validation..."

Size Tasks Appropriately

• Too small: coordination overhead exceeds benefit
• Too large: teammates work too long without check-ins
• Just right: self-contained units (function, test file, review)

Avoid File Conflicts

Break work so each teammate owns different files. Two teammates editing same file causes overwrites.

Monitor and Steer

Check progress, redirect approaches, synthesize findings. Don’t leave teams unattended too long.

Cleanup

When finished:

Clean up the team

The lead removes shared team resources. Always use the lead for cleanup, not teammates.

Troubleshooting

When to Use Agent Teams

Best for:

• Research and review (multiple perspectives simultaneously)
• New modules or features (independent pieces)
• Debugging with competing hypotheses (parallel investigation)
• Cross-layer coordination (frontend, backend, tests)

Not ideal for:

• Sequential tasks
• Same-file edits
• Work with many dependencies

Common Patterns

Parallel Code Review

Create an agent team to review PR #142. Spawn three reviewers:
- One focused on security implications
- One checking performance impact
- One validating test coverage
Have them each review and report findings.

Investigate with Competing Hypotheses

Users report the app exits after one message instead of staying connected.
Spawn 5 agent teammates to investigate different hypotheses. Have them talk
to each other to try to disprove each other's theories.

Limitations

• No session resumption with in-process teammates
• Task status can lag behind actual completion
• Shutdown can be slow (teammates finish current request first)
• One team per session
• No nested teams (teammates can’t spawn their own)
• Lead is fixed for team lifetime
• Split panes require tmux or iTerm2 (not VS Code terminal, Windows Terminal, Ghostty)