minor #432 Add CLAUDE.md file (OskarStark)

This PR was merged into the main branch.

Discussion
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 Add `CLAUDE.md` file

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| Issues        | --
| License       | MIT

Commits
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96da082 Add `CLAUDE.md` file

Author: OskarStark

CLAUDE.md

@@ -0,0 +1,111 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is the Symfony AI monorepo containing multiple components and bundles that integrate AI capabilities into PHP applications. The project is organized as a collection of independent packages under the `src/` directory, each with their own composer.json, tests, and dependencies.
+
+## Architecture
+
+### Core Components
+- **Platform** (`src/platform/`): Unified interface to AI platforms (OpenAI, Anthropic, Azure, Gemini, VertexAI, etc.)
+- **Agent** (`src/agent/`): Framework for building AI agents that interact with users and perform tasks
+- **Store** (`src/store/`): Data storage abstraction with indexing and retrieval for vector databases
+- **MCP SDK** (`src/mcp-sdk/`): SDK for Model Context Protocol enabling agent-tool communication
+
+### Integration Bundles
+- **AI Bundle** (`src/ai-bundle/`): Symfony integration for Platform, Store, and Agent components
+- **MCP Bundle** (`src/mcp-bundle/`): Symfony integration for MCP SDK
+
+### Supporting Directories
+- **Examples** (`examples/`): Standalone examples demonstrating component usage across different AI platforms
+- **Demo** (`demo/`): Full Symfony web application showcasing components working together
+- **Fixtures** (`fixtures/`): Shared test fixtures for multi-modal testing (images, audio, PDFs)
+
+## Development Commands
+
+### Testing
+Each component has its own test suite. Run tests for specific components:
+```bash
+# Platform component
+cd src/platform && vendor/bin/phpunit
+
+# Agent component  
+cd src/agent && vendor/bin/phpunit
+
+# AI Bundle
+cd src/ai-bundle && vendor/bin/phpunit
+
+# Demo application
+cd demo && vendor/bin/phpunit
+```
+
+### Code Quality
+The project uses PHP CS Fixer with Symfony coding standards:
+```bash
+# Fix code style issues
+vendor/bin/php-cs-fixer fix
+
+# Check specific directories
+vendor/bin/php-cs-fixer fix src/platform/
+```
+
+Static analysis with PHPStan (component-specific):
+```bash
+cd src/platform && vendor/bin/phpstan analyse
+```
+
+### Development Linking
+Use the `./link` script to symlink local development versions:
+```bash
+# Link components to external project
+./link /path/to/project
+
+# Copy instead of symlink
+./link --copy /path/to/project
+
+# Rollback changes
+./link --rollback /path/to/project
+```
+
+### Running Examples
+Examples are self-contained and can be run individually:
+```bash
+cd examples
+php anthropic/chat.php
+php openai/function-calling.php
+```
+
+Many examples require environment variables (see `.env` files in example directories).
+
+### Demo Application
+The demo is a full Symfony application:
+```bash
+cd demo
+composer install
+symfony server:start
+```
+
+## Component Dependencies
+
+Components are designed to work independently but have these relationships:
+- Agent depends on Platform for AI communication
+- AI Bundle integrates Platform, Agent, and Store
+- MCP Bundle provides MCP SDK integration
+- Store is standalone but often used with Agent for RAG applications
+
+## Testing Architecture
+
+Each component uses:
+- **PHPUnit 11+** for testing framework
+- Component-specific `phpunit.xml.dist` configurations
+- Shared fixtures in `/fixtures` for multi-modal content
+- MockHttpClient pattern preferred over response mocking
+
+## Development Notes
+
+- Each component in `src/` is a separate Composer package with its own dependencies
+- Use `@dev` versions for internal component dependencies during development
+- Components follow Symfony coding standards and use `@Symfony` PHP CS Fixer rules
+- The monorepo structure allows independent versioning while maintaining shared development workflow