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# CopilotKit Agent Development Guide
## Agent Types
### Python Agents
Python agents are typically in folders named `agent-py/` or `agent/` and use the [sdk-python/](mdc:sdk-python/) package.
#### Core Python SDK Components
- **[copilotkit/agent.py](mdc:sdk-python/copilotkit/agent.py)** - Main agent class
- **[copilotkit/action.py](mdc:sdk-python/copilotkit/action.py)** - Action definitions
- **[copilotkit/crewai/](mdc:sdk-python/copilotkit/crewai/)** - CrewAI integration
- **[copilotkit/integrations/](mdc:sdk-python/copilotkit/integrations/)** - Third-party integrations
#### Python Agent Examples
- **[coagents-starter/agent-py/](mdc:examples/coagents-starter/agent-py/)** - Basic Python agent setup
- **[coagents-ai-researcher/agent/](mdc:examples/coagents-ai-researcher/agent/)** - Research agent with web scraping
- **[coagents-travel/agent/](mdc:examples/coagents-travel/agent/)** - Travel planning agent
- **[langgraph-tutorial-quickstart/agent-py/](mdc:examples/langgraph-tutorial-quickstart/agent-py/)** - LangGraph integration
### JavaScript Agents
JavaScript agents are in folders named `agent-js/` and use the [sdk-js/](mdc:packages/sdk-js/) package.
#### JavaScript Agent Examples
- **[coagents-starter/agent-js/](mdc:examples/coagents-starter/agent-js/)** - Basic JavaScript agent setup
- **[coagents-qa-native/agent-js/](mdc:examples/coagents-qa-native/agent-js/)** - Native JavaScript QA agent
- **[coagents-routing/agent-js/](mdc:examples/coagents-routing/agent-js/)** - Routing agent
## Agent Patterns
### Single Agent Pattern
Simple agents that handle specific tasks:
- File structure: `agent/main.py` or `agent/index.js`
- Direct communication with frontend
- Good for focused use cases
### Multi-Agent (Coagents) Pattern
Complex systems with multiple cooperating agents:
- Multiple agent files or classes
- Shared state management
- Agent routing and coordination
- Examples: [coagents-routing/](mdc:examples/coagents-routing/), [coagents-shared-state/](mdc:examples/coagents-shared-state/)
### CrewAI Integration Pattern
Using CrewAI for agent orchestration:
- **Flows**: [coagents-starter-crewai-flows/](mdc:examples/coagents-starter-crewai-flows/)
### LangGraph Integration Pattern
Using LangGraph for agent state management:
- **[langgraph-tutorial-quickstart/](mdc:examples/langgraph-tutorial-quickstart/)** - Basic LangGraph setup
- **[langgraph-tutorial-customer-support/](mdc:examples/langgraph-tutorial-customer-support/)** - Customer support bot
- Uses [langgraph.json](mdc:sdk-python/langgraph.json) for configuration
## Agent Setup
### Python Agent Setup
1. Use [requirements-template.txt](mdc:examples/shared/requirements-template.txt) as a starting point
2. Configure [pyproject-template.toml](mdc:examples/shared/pyproject-template.toml)
3. Import from `copilotkit` package
4. Define actions and agent logic
### JavaScript Agent Setup
1. Install `@copilotkit/sdk-js` package
2. Configure TypeScript with proper types
3. Define actions and agent endpoints
4. Set up Express.js server or similar
## Common Agent Features
### Actions
- Define functions that agents can call
- Handle user interactions
- Modify application state
- Examples in action.py files across examples
### State Management
- Shared state between agents
- Persistent state across conversations
- Example: [coagents-shared-state/](mdc:examples/coagents-shared-state/)
### User Input Handling
- Wait for user input during agent execution
- Interactive workflows
- Example: [coagents-wait-user-input/](mdc:examples/coagents-wait-user-input/)
### Integration Patterns
- Vector databases (Pinecone, MongoDB Atlas)
- LLM providers (OpenAI, Anthropic)
- External APIs and services
## Development Best Practices
1. Start with a simple agent template
2. Define clear actions and interfaces
3. Handle errors gracefully
4. Test with the corresponding UI example
5. Use shared utilities from [examples/shared/](mdc:examples/shared/)
6. Follow the established patterns in existing examples