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+# Project Overview
+
+**PapiAI Core** is a framework-agnostic, type-safe PHP library designed for building robust AI agents. It abstracts the complexity of interacting with various LLM providers (like Anthropic and Google) while offering powerful features such as tool calling, structured output validation via Zod-like schemas, and event-driven streaming. Built for PHP 8.2+, it serves as a lightweight foundation for integrating AI capabilities into any PHP application, from simple scripts to complex Laravel or Symfony projects.
+
+# Roadmap
+
+### Phase 1: Foundation (Current)
+- [x] Core Agent & Tool architecture
+- [x] Type-safe Schema validation
+- [x] Provider interface abstraction
+- [x] Anthropic (Claude) integration
+- [x] Google (Gemini) integration
+- [x] Event-driven streaming support
+
+### Phase 2: Expansion (Short-term)
+- [ ] **OpenAI Integration**: Full support for GPT-4o and other OpenAI models.
+- [ ] **Memory Management**: Standardized interfaces for conversation history (Redis, Database adapters).
+- [ ] **Resilience**: Built-in retry mechanisms and rate-limit handling.
+- [ ] **Documentation**: Comprehensive guides and API references.
+
+### Phase 3: Advanced Capabilities (Mid-term)
+- [ ] **Middleware System**: Hooks for logging, cost tracking, and content filtering.
+- [ ] **Vector Store Integration**: Native support for RAG (Retrieval-Augmented Generation).
+- [ ] **CLI Tooling**: Scaffolding commands for generating agents and tools.
+- [ ] **Local LLM Support**: Integration with Ollama and local inference servers.
+
+### Phase 4: Ecosystem (Long-term)
+- [ ] **Multi-Agent Orchestration**: Patterns for agents working in teams.
+- [ ] **Async Runtime**: Optimized support for Swoole/ReactPHP/Amp.
+- [ ] **Visual Builder**: UI tools for designing agent workflows.
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+# PapiAI Project Wiki
+
+## 1. Project Overview
+
+**PapiAI** is a modern, framework-agnostic PHP library designed for building robust AI agents. It provides a unified interface to interact with various Large Language Models (LLMs) like Anthropic Claude and Google Gemini, making it easy to integrate AI capabilities into any PHP application (Laravel, Symfony, or standalone).
+
+### Key Philosophy
+- **Simplicity**: Clean, intuitive API for creating agents.
+- **Type Safety**: Built on PHP 8.2+ with strict typing.
+- **Modularity**: Core logic is separated from specific provider implementations.
+
+## 2. Architecture
+
+The project is structured around a few key abstractions:
+
+### Core Components (`papi-ai/papi-core`)
+- **Agent**: The main entry point. It orchestrates interactions between the user, the LLM provider, and available tools.
+- **ProviderInterface**: The contract that all LLM providers must implement. It standardizes:
+  - `chat()`: Standard request/response.
+  - `stream()`: Real-time streaming responses.
+  - Capabilities: `supportsTool()`, `supportsVision()`, `supportsStructuredOutput()`.
+- **Tool**: encapsulations of functions or class methods that the AI can "call" to perform actions (e.g., fetching weather, querying a database).
+- **Schema**: A fluent builder (Zod-like) for defining structured output requirements, ensuring the AI returns data in a predictable format.
+
+### Providers
+Specific implementations are handled in separate packages to keep the core lightweight:
+- `papi-ai/anthropic`: Adapter for Anthropic's Claude models.
+- `papi-ai/google`: Adapter for Google's Gemini models.
+- `papi-ai/openai`: (Planned/In-progress) Adapter for OpenAI.
+
+## 3. Getting Started
+
+### Installation
+Install the core package and your desired provider:
+
+```bash
+composer require papi-ai/core
+composer require papi-ai/anthropic
+```
+
+### Basic Usage
+Here is how to create a simple agent using Claude:
+
+```php
+use PapiAI\Core\Agent;
+use PapiAI\Anthropic\AnthropicProvider;
+
+$agent = new Agent(
+    provider: new AnthropicProvider(apiKey: $_ENV['ANTHROPIC_API_KEY']),
+    model: 'claude-3-5-sonnet-20240620',
+    instructions: 'You are a helpful coding assistant.'
+);
+
+$response = $agent->run('Refactor this class for me...');
+echo $response->text;
+```
+
+## 4. Advanced Features
+
+- **Tool Calling**: Define PHP functions or class methods as tools. The Agent handles the LLM's request to execute them.
+- **Structured Output**: Enforce JSON schemas on responses for reliable data extraction.
+- **Streaming**: Subscribe to event streams for real-time UI updates.
+- **Observability**: Hooks available for logging and monitoring agent performance.