Agentic RAG Architecture Design

Design an agentic RAG system with tool use and reasoning capabilities.

## Use Case
{{use_case}}

## Available Tools
{{available_tools}}

## Reasoning Requirements
{{reasoning_requirements}}

Design the architecture:

**Planning Layer**
- Query analysis and task decomposition
- Tool selection strategy
- Multi-step planning

**Execution Layer**
- Tool invocation orchestration
- Intermediate result handling
- Error recovery and replanning

**Memory Layer**
- Short-term working memory
- Long-term knowledge integration
- Context carryover

**Synthesis Layer**
- Result aggregation
- Answer construction
- Citation generation

Provide:
- System architecture diagram
- State machine definition
- Implementation code structure
- Evaluation methodology