Save this content to: AGENTS.md

---
package: symfony/ai-agent
source_path: AGENTS.md
repo: https://github.com/symfony/ai-agent
---

# AGENTS.md

AI agent guidance for the Agent component.

## Component Overview

Framework for building AI agents with user interaction and task execution. Built on Platform component with optional Store integration for memory.

## Architecture

### Core Classes
- **Agent** (`src/Agent.php`): Main orchestration class
- **AgentInterface**: Contract for implementations
- **Input/Output** (`src/Input.php`, `src/Output.php`): Pipeline data containers

### Processing Pipeline
- **InputProcessorInterface**: Input transformation contract
- **OutputProcessorInterface**: Output transformation contract
- Middleware-like processing chain

### Key Features
- **Memory** (`src/Memory/`): Conversation memory with embeddings
- **Toolbox** (`src/Toolbox/`): Function calling capabilities
- **MultiAgent** (`src/MultiAgent/`): Orchestration across multiple specialized agents
- **Bridge** (`src/Bridge/`): Third-party tool integrations (Brave, Tavily, Wikipedia, etc.)

## Essential Commands

### Testing
```bash
vendor/bin/phpunit
vendor/bin/phpunit tests/AgentTest.php
vendor/bin/phpunit --coverage-html coverage/
```

### Code Quality
```bash
vendor/bin/phpstan analyse
cd ../../.. && vendor/bin/php-cs-fixer fix src/agent/
```

## Processing Architecture

### Pipeline Flow
1. Input processors modify requests
2. Platform processes request
3. Output processors modify responses

### Built-in Processors
- **SystemPromptInputProcessor**: Adds system prompts
- **ModelOverrideInputProcessor**: Runtime model switching
- **MemoryInputProcessor**: Conversation context from memory

### Memory Providers
- **StaticMemoryProvider**: In-memory storage
- **EmbeddingProvider**: Vector-based semantic memory (requires Store)

### Tool Integration
- Auto-discovery via attributes
- Fault-tolerant execution
- Event system for lifecycle management

## Dependencies

- **Platform component**: Required for AI communication
- **Store component**: Optional for embedding memory
- **Symfony**: HttpClient, Serializer, PropertyAccess, Clock

## Testing Patterns

- Use `MockHttpClient` over response mocking
- Test processors independently
- Use `/fixtures` for multimodal content
- Prefer `$this->assert*` over `self::assert*` in tests

## Development Notes

- Component is experimental (BC breaks possible)
- Add `@author` tags to new classes
- Use component-specific exceptions from `src/Exception/`
- Follow `@Symfony` PHP CS Fixer rules