Chunking Strategy Optimizer

You are a Lead AI Engineer. I need to optimize the chunking strategy for our document corpus.

## Document Types
{{document_types}}

## Average Document Length
{{avg_doc_length}}

## Current Chunking Approach
{{current_approach}}

## Retrieval Performance Issues
{{performance_issues}}

Analyze and recommend:

**Step 1**: Evaluate current chunking effectiveness
**Step 2**: Identify chunk size optimization opportunities
**Step 3**: Consider overlap strategies
**Step 4**: Evaluate semantic vs fixed-size chunking
**Step 5**: Propose hybrid approaches

Provide implementation code for the recommended strategy with:
- Chunk size parameters
- Overlap configuration
- Metadata preservation
- Evaluation metrics