Agent Teams - Claude Code Best Practice

Overview

Agent Teams enable multiple Claude agents to work in parallel on the same codebase with shared task coordination. This pattern is ideal for complex projects that can be decomposed into independent workstreams.

Agent Teams is a Claude Code feature that orchestrates parallel agent execution with shared context and task management.

When to Use Agent Teams

Agent Teams shine when you have:

Parallelizable Work

Tasks that can be executed independently without blocking each other

Multiple Domains

Work spanning different areas (frontend + backend, multiple services)

Large Features

Complex features that benefit from specialized agent focus

Time Constraints

Deadlines that benefit from parallel execution

How Agent Teams Work

Key Characteristics

Shared Task List

All agents work from a coordinated task list, updating status as they progress

Parallel Execution

Multiple agents execute simultaneously, each with their own context and tools

Conflict Avoidance

Task assignment ensures agents work on non-conflicting files/modules

Progress Visibility

Shared task board shows real-time progress across all agents

Setting Up Agent Teams

1. Define Specialized Agents

Create agents with clear domains of responsibility:

Frontend Agent
Backend Agent
Testing Agent

.claude/agents/frontend-specialist.md

---
name: frontend-specialist
description: PROACTIVELY handle all React, TypeScript, and UI tasks
tools: Read, Write, Edit, Bash, Glob, Grep
model: opus
color: blue
permissionMode: acceptEdits
---

# Frontend Specialist Agent

You are a frontend specialist focused on:
- React components and hooks
- TypeScript types and interfaces
- UI/UX implementation
- Frontend testing (Jest, Testing Library)

## Working Principles
- Follow existing component patterns
- Maintain type safety
- Write tests for all components
- Use project's UI library components

## File Scope
- `src/components/**`
- `src/hooks/**`
- `src/pages/**`
- `src/styles/**`

.claude/agents/backend-specialist.md

---
name: backend-specialist
description: PROACTIVELY handle all API, database, and server-side tasks
tools: Read, Write, Edit, Bash, Glob, Grep
model: opus
color: green
permissionMode: acceptEdits
---

# Backend Specialist Agent

You are a backend specialist focused on:
- API endpoints and middleware
- Database models and migrations
- Business logic and services
- Backend testing (unit, integration)

## Working Principles
- Follow RESTful API conventions
- Validate all inputs
- Write comprehensive tests
- Handle errors gracefully

## File Scope
- `src/api/**`
- `src/models/**`
- `src/services/**`
- `src/middleware/**`
- `migrations/**`

.claude/agents/test-specialist.md

---
name: test-specialist
description: PROACTIVELY write tests, fix failing tests, improve coverage
tools: Read, Write, Edit, Bash, Grep
model: sonnet
color: yellow
permissionMode: acceptEdits
---

# Test Specialist Agent

You are a testing specialist focused on:
- Writing comprehensive test suites
- Fixing failing tests
- Improving test coverage
- End-to-end testing

## Working Principles
- Aim for >80% coverage
- Test edge cases and error paths
- Keep tests maintainable
- Mock external dependencies

## File Scope
- `**/*.test.ts`
- `**/*.test.tsx`
- `tests/**`
- `e2e/**`

2. Create Task Plan

Break down work into parallelizable tasks:

tasks.md

# Feature: User Profile Management

## Frontend Tasks (frontend-specialist)
- [ ] Create ProfileView component
- [ ] Add ProfileEdit form
- [ ] Implement avatar upload UI
- [ ] Add profile validation
- [ ] Style profile pages

## Backend Tasks (backend-specialist)
- [ ] Create /api/profile endpoints (GET, PUT)
- [ ] Add profile model and schema
- [ ] Implement avatar storage service
- [ ] Add profile validation middleware
- [ ] Write API documentation

## Testing Tasks (test-specialist)
- [ ] Unit tests for ProfileView
- [ ] Unit tests for profile API
- [ ] Integration tests for profile flow
- [ ] E2E test for profile update

3. Launch Agent Team

# Launch multiple agents in parallel
Task(
  subagent_type="frontend-specialist",
  description="Implement frontend profile components",
  prompt="Complete frontend tasks from tasks.md"
)

Task(
  subagent_type="backend-specialist",
  description="Implement backend profile API",
  prompt="Complete backend tasks from tasks.md"
)

Task(
  subagent_type="test-specialist",
  description="Write tests for profile feature",
  prompt="Complete testing tasks from tasks.md"
)

# Let Claude Code orchestrate the team
/team-start tasks.md

Send multiple Task tool calls in a single message to run agents in parallel. Sequential messages run agents one at a time.

Task Coordination Patterns

Pattern 1: Domain-Based Split

Split by technical domain (frontend/backend/infra):

Agent A: All frontend work
Agent B: All backend work
Agent C: All DevOps/infrastructure work

Pros: Clear boundaries, minimal conflicts Cons: Can’t parallelize within a domain

Pattern 2: Feature-Based Split

Split by feature when multiple features are independent:

Agent A: User authentication feature
Agent B: Payment processing feature
Agent C: Notification system feature

Pros: Full ownership per feature, can ship independently Cons: Requires truly independent features

Pattern 3: Layer-Based Split

Split by architectural layer:

Agent A: Database layer (models, migrations)
Agent B: Business logic layer (services)
Agent C: API layer (controllers, routes)
Agent D: Presentation layer (UI components)

Pros: Specialists can focus on their layer Cons: Requires careful interface coordination

Pattern 4: Phase-Based Split

Split by development phase:

Phase 1:
  Agent A: Implement feature
  Agent B: Write tests

Phase 2:
  Agent C: Fix bugs found in testing
  Agent D: Add documentation

Pros: Natural workflow progression Cons: Phases may need to be sequential

Best Practices

Define Clear Boundaries

Problem: Agents working on same files causes merge conflictsSolution:

Assign non-overlapping file scopes
Use file path prefixes (src/frontend/** vs src/backend/**)
Document agent responsibilities clearly
Review task plan for potential conflicts before starting

Use Appropriate Models

Problem: Cost vs. quality trade-offs across agentsSolution:

Use opus for complex implementation work
Use sonnet for testing and documentation
Use haiku for simple, repetitive tasks
Match model to task complexity and importance

Coordinate Dependencies

Problem: Agent B needs output from Agent ASolution:

Phase the work: finish A before starting B
Use interface contracts (API specs, type definitions)
Have agents work against mocked dependencies
Define clear handoff points in task plan

Monitor Progress

Problem: Hard to track status across multiple agentsSolution:

Use shared task list with checkboxes
Require agents to update task status
Set up notifications for task completion
Review consolidated progress regularly

Example: E-commerce Feature

Let’s implement a product review system using agent teams.

Task Breakdown

Tasks.md
Coordination Notes

# Product Review System

## Frontend Tasks (@frontend-specialist)
- [ ] ReviewList component
- [ ] ReviewForm component
- [ ] StarRating component
- [ ] Review moderation UI (admin)
- [ ] Frontend review types

## Backend Tasks (@backend-specialist)
- [ ] POST /api/reviews endpoint
- [ ] GET /api/reviews/:productId endpoint
- [ ] Review model and schema
- [ ] Review validation middleware
- [ ] Moderation endpoints (admin)

## Testing Tasks (@test-specialist)
- [ ] Unit: ReviewList, ReviewForm
- [ ] Unit: Review API endpoints
- [ ] Integration: Review submission flow
- [ ] E2E: Submit and display review

## Database Tasks (@backend-specialist)
- [ ] Create reviews table migration
- [ ] Add indexes for product_id

# Coordination Notes

## Interface Contract

### Review API Schema
```typescript
interface Review {
  id: string;
  productId: string;
  userId: string;
  rating: 1 | 2 | 3 | 4 | 5;
  title: string;
  body: string;
  verified: boolean;
  createdAt: Date;
}

API Endpoints

POST /api/reviews - Submit review
GET /api/reviews/:productId - Get reviews for product

Dependencies

Backend creates API contract first
Frontend implements against contract
Testing validates both layers

File Ownership

Frontend: src/components/reviews/**
Backend: src/api/reviews/**, src/models/review.ts
Testing: tests/**/*review*.test.ts

</Tab>

<Tab title="Execution">
```bash
# Launch all agents in parallel (single message)
Task(subagent_type="backend-specialist", ...)
Task(subagent_type="frontend-specialist", ...)
Task(subagent_type="test-specialist", ...)

# Expected timeline:
# 0-15 min: Backend creates API and schema
# 15-30 min: Frontend builds components
# 30-45 min: Testing writes test suites
# 45-60 min: Integration and fixes

Progress Tracking

# Progress Dashboard

## Sprint Status
Started: 2026-03-04 10:00 AM
Target: 2026-03-04 2:00 PM

## Agent Status
| Agent | Status | Progress | Current Task |
|-------|--------|----------|-------------|
| backend-specialist | 🟢 Active | 3/5 | Review validation middleware |
| frontend-specialist | 🟢 Active | 2/5 | ReviewForm component |
| test-specialist | 🟡 Waiting | 0/4 | Waiting for components |

## Completed Tasks
- [x] Review model and schema (backend)
- [x] POST /api/reviews endpoint (backend)
- [x] GET /api/reviews/:productId endpoint (backend)
- [x] ReviewList component (frontend)
- [x] StarRating component (frontend)

## Blocked/Issues
- ⚠️ test-specialist waiting for backend API to deploy to dev

Git Workflow with Agent Teams

Coordinate agents with Git best practices:

Option 1: Feature Branches

# Each agent works on its own branch
Agent A: feature/profile-frontend
Agent B: feature/profile-backend
Agent C: feature/profile-tests

# Merge strategy
1. Merge backend first (foundation)
2. Merge frontend (depends on backend)
3. Merge tests (validates both)

Option 2: Shared Feature Branch

# All agents work on same branch
feature/user-profile

# Coordination
- Agents commit frequently
- Pull before each commit
- Use atomic commits per task

Option 3: Git Worktrees (Recommended)

Use Git worktrees for true isolation:

# Each agent gets its own worktree
Agent A: worktree-frontend/
Agent B: worktree-backend/
Agent C: worktree-tests/

# Benefits
- Zero merge conflicts during development
- Each agent can run tests independently
- Merge only when ready

See Git Worktrees for detailed workflow.

Agent Team Patterns

Small Team (2-3 agents)

Best for: Medium features, clear domain split

Agent 1: Implementation (opus)
Agent 2: Testing (sonnet)
Agent 3: Documentation (haiku)

Large Team (4-6 agents)

Best for: Large features, multiple subsystems

Agent 1: Frontend components (opus)
Agent 2: Frontend state management (opus)
Agent 3: Backend API (opus)
Agent 4: Database layer (sonnet)
Agent 5: Testing (sonnet)
Agent 6: Documentation (haiku)

Specialized Team

Best for: Complex technical challenges

Agent 1: Core algorithm (opus)
Agent 2: Performance optimization (opus)
Agent 3: API integration (sonnet)
Agent 4: Error handling (sonnet)
Agent 5: Comprehensive testing (opus)

Troubleshooting

Merge Conflicts

Problem: Multiple agents modified the same filePrevention:

Better task assignment (non-overlapping files)
Use Git worktrees for isolation
Define clear file ownership

Resolution:

Review both changes
Manually merge in coordinating agent
Update task plan to prevent future conflicts

Dependency Deadlock

Problem: Agent A waiting for Agent B, Agent B waiting for Agent APrevention:

Map dependencies in task plan
Phase work (A completes before B starts)
Use interface contracts (work against mocks)

Resolution:

Identify blocking dependency
Prioritize one agent to unblock
Refactor to remove circular dependency

Inconsistent Quality

Problem: Some agents producing lower quality workSolutions:

Use same model for critical tasks (opus)
Add code review agent to validate
Provide clearer task specifications
Use skills to inject best practices

Advanced Techniques

Coordinator Agent

Use a meta-agent to orchestrate the team:

.claude/agents/team-coordinator.md

---
name: team-coordinator
description: Orchestrate agent team and track progress
tools: Task, TodoWrite, Read, Write
model: sonnet
---

# Team Coordinator Agent

You orchestrate multiple agents working on a shared project.

## Responsibilities
1. Break down work into agent-specific tasks
2. Launch agents in parallel via Task tool
3. Monitor progress and update task board
4. Identify blockers and coordinate handoffs
5. Report overall status to user

## Workflow
1. Read feature requirements
2. Create task plan with agent assignments
3. Launch agents in parallel (single message)
4. Monitor and report progress
5. Coordinate integration and testing

Dynamic Agent Assignment

Adjust agent assignments based on progress:

# Initial Plan
Agent A: Tasks 1-5
Agent B: Tasks 6-10

# After Task 5 completes early
Agent A: Tasks 1-5 ✓, now helping with 8-10
Agent B: Tasks 6-7, then focus on 11-12

Use shared skills for consistency:

# All agents use same testing skill
agents:
  - name: frontend-specialist
    skills: [project-testing-standards]
  - name: backend-specialist
    skills: [project-testing-standards]

Measuring Success

Velocity

Track tasks completed per hour across all agents

Parallelization

Measure time saved vs. sequential execution

Quality

Monitor test coverage and code review issues

Conflicts

Track merge conflicts and integration issues

Git Worktrees

Isolated development environments for parallel work

RPI Workflow

Structured workflow for feature development

Orchestration Workflow

Command → Agent → Skill pattern

Resources

Agent Teams Docs

Official Claude Code documentation

Sub-Agents Guide

Learn about agent configuration

Task Tool Reference

Task tool API documentation

Best Practices

Community best practices

​Overview

​When to Use Agent Teams

Parallelizable Work

Multiple Domains

Large Features

Time Constraints

​How Agent Teams Work

​Key Characteristics

​Setting Up Agent Teams

​1. Define Specialized Agents

​2. Create Task Plan

​3. Launch Agent Team

​Task Coordination Patterns

​Pattern 1: Domain-Based Split

​Pattern 2: Feature-Based Split

​Pattern 3: Layer-Based Split

​Pattern 4: Phase-Based Split

​Best Practices

​Example: E-commerce Feature

​Task Breakdown

​API Endpoints

​Dependencies

​File Ownership

​Progress Tracking

​Git Workflow with Agent Teams

​Option 1: Feature Branches

​Option 2: Shared Feature Branch

​Option 3: Git Worktrees (Recommended)

​Agent Team Patterns

​Small Team (2-3 agents)

​Large Team (4-6 agents)

​Specialized Team

​Troubleshooting

​Advanced Techniques

​Coordinator Agent

​Dynamic Agent Assignment

​Skill Sharing Across Agents

​Measuring Success

Velocity

Parallelization

Quality

Conflicts

​Related Patterns

Git Worktrees

RPI Workflow

Orchestration Workflow

​Resources

Agent Teams Docs

Sub-Agents Guide

Task Tool Reference

Best Practices

Overview

When to Use Agent Teams

How Agent Teams Work

Key Characteristics

Setting Up Agent Teams

1. Define Specialized Agents

2. Create Task Plan

3. Launch Agent Team

Task Coordination Patterns

Pattern 1: Domain-Based Split

Pattern 2: Feature-Based Split

Pattern 3: Layer-Based Split

Pattern 4: Phase-Based Split

Best Practices

Example: E-commerce Feature

Task Breakdown

API Endpoints

Dependencies

File Ownership

Progress Tracking

Git Workflow with Agent Teams

Option 1: Feature Branches

Option 2: Shared Feature Branch

Option 3: Git Worktrees (Recommended)

Agent Team Patterns

Small Team (2-3 agents)

Large Team (4-6 agents)

Specialized Team

Troubleshooting

Advanced Techniques

Coordinator Agent

Dynamic Agent Assignment

Skill Sharing Across Agents

Measuring Success

Related Patterns

Resources