# BigGrep Source Code Analysis - Research Plan

## Objective
Analyze the BigGrep source code structure to understand the implementation details of each CLI tool, focusing on command-line arguments, file processing logic, and core algorithms.

## Target Components for Analysis

### 1. bgindex - Index Building Tool
- [ ] Command-line arguments analysis
- [ ] File processing logic 
- [ ] N-gram indexing implementation
- [ ] Index file format and structure

### 2. bgsearch - Python Wrapper
- [ ] Python wrapper functionality
- [ ] Verification options
- [ ] Metadata filtering capabilities
- [ ] Search interface implementation

### 3. bgparse - Index Parser
- [x] Index reading logic
- [x] Candidate file generation
- [x] Parsing algorithms and data structures

### 4. bgverify - Pattern Verifier  
- [ ] Boyer-Moore-Horspool implementation
- [ ] Pattern matching logic
- [ ] Verification algorithms

### 5. bgextractfile - Index Management
- [ ] Index management functionality
- [ ] File extraction capabilities
- [ ] Index manipulation tools

## Research Steps

1. [x] Locate BigGrep source code repository
2. [x] Download and examine source code structure
3. [x] Analyze each CLI tool component systematically
4. [x] Extract command-line options and usage patterns
5. [x] Document core algorithms and data structures
6. [x] Create comprehensive analysis report

## Expected Deliverables
- Complete command-line interface documentation
- Core algorithm explanations with code examples
- Usage patterns and examples
- Implementation architecture overview
- Performance and efficiency considerations

## Output Location
All analysis results will be saved under `docs/biggrep_analysis/` directory.