Adaptive Chunking Strategy

Implement adaptive chunking that adjusts based on document characteristics.

## Document Types
{{document_types}}

## Content Patterns
{{content_patterns}}

## Quality Metrics
{{quality_metrics}}

Build adaptive chunking:

```python
class AdaptiveChunker:
    def analyze_document(self, document: str) -> DocumentProfile:
        """
        Profile includes:
        - Document type
        - Structure complexity
        - Section patterns
        - Average sentence length
        """
        pass
    
    def select_strategy(self, profile: DocumentProfile) -> ChunkingStrategy:
        """
        Strategies:
        - Fixed size for uniform content
        - Semantic for narrative text
        - Structural for formatted docs
        - Hybrid for mixed content
        """
        pass
    
    def chunk_with_strategy(self, document: str, strategy: ChunkingStrategy) -> List[Chunk]:
        """Apply selected strategy"""
        pass
```

Include:
- Document type detection
- Strategy selection rules
- Quality validation
- Performance optimization