Add reasoning to LangGraph AI assistant - #6
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Implements visible reasoning text similar to ChatGPT and Cursor, with support
for both Claude extended thinking and custom reasoning for OpenAI/DeepSeek models.
## New Features
### Core Functionality
- **Claude Extended Thinking**: Native support for Claude models with automatic
reasoning extraction from thinking blocks
- **Custom Reasoning**: Two-step reasoning approach for OpenAI, DeepSeek, and
other LLMs that generates explicit step-by-step thinking
- **Plan-and-Execute Reasoning**: Enhanced plan-and-execute graph with reasoning
at planning, execution, and replanning stages
### Files Added
- app/agent/reasoning.py - Custom reasoning nodes (reasoning_node, reasoning_chat_node)
- app/agent/openai_reasoning_graph.py - Ready-to-use graphs for OpenAI models
with reasoning (3 variants: default, explicit, conditional)
- app/agent/plan_and_execute_with_reasoning.py - Plan-execute with reasoning
- test_reasoning.py - Test suite for verifying reasoning functionality
### Files Modified
- app/agent/model.py - Added ChatAnthropic support with extended_thinking enabled
- app/agent/chat.py - Added ThinkingCallbackHandler and thinking block extraction
- pyproject.toml - Added langchain-anthropic>=0.3.19 dependency
### Documentation
- docs/OPENAI_REASONING_GUIDE.md - Complete guide for OpenAI users
- docs/REASONING_GUIDE.md - Comprehensive guide covering all approaches
- docs/REASONING_IMPLEMENTATION_SUMMARY.md - Technical implementation details
## How to Use
### For OpenAI Models
```python
from app.agent.openai_reasoning_graph import openai_reasoning_graph
agent = LangGraphAGUIAgent(
name="mcpAssistant",
graph=openai_reasoning_graph
)
```
### For Claude Models
Just set model to "claude-sonnet-4-5" - extended thinking is automatic
## Benefits
- Transparent AI decision-making process
- Better user trust and understanding
- ChatGPT/Cursor-like reasoning display
- Works with any LLM provider
- Fully integrated with AG-UI protocol
## Testing
Run: python test_reasoning.py
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Implements visible reasoning text similar to ChatGPT and Cursor, with support for both Claude extended thinking and custom reasoning for OpenAI/DeepSeek models.
New Features
Core Functionality
Files Added
Files Modified
Documentation
How to Use
For OpenAI Models
For Claude Models
Just set model to "claude-sonnet-4-5" - extended thinking is automatic
Benefits
Testing
Run: python test_reasoning.py