# Unqualified Import Inference - Implementation Summary

## Approach
Two-tier mapping system (qualified + unqualified) with AST pre-scan for local function detection. Comprehensive stdlib coverage (~500 functions, 40 packages).

## Key Decisions
- **Ambiguity**: Conservative errors (force qualification for Open, Get, etc.)
- **Local Functions**: AST pre-scan builds exclusion list (no false transforms)
- **Transformation**: Preprocessor stage (ReadFile → os.ReadFile + import injection)
- **Registry**: Automated generation from stdlib, manually curated ambiguities

## Implementation Phases
1. **Day 1**: Create stdlib registry + local scanner
2. **Day 2**: Implement transformation processor + pipeline integration
3. **Day 3**: Ambiguity detection + edge case handling
4. **Day 4**: Comprehensive testing + documentation

## Timeline: 4 days
## Files: 6 new, 3 modified, 8 test files
## Risk: Low (backward compatible, conservative errors)
