# Phase 2 Plan 01: Stadium Data Audit & Completion Summary

**Added year_opened field to all 122 hardcoded stadiums across MLB, NBA, NHL, and NFL modules.**

## Accomplishments

- Audited all 4 sport modules confirming expected stadium counts:
  - MLB: 30 stadiums
  - NBA: 30 stadiums
  - NHL: 32 stadiums
  - NFL: 30 stadiums (includes 2 shared: SoFi Stadium, MetLife Stadium)
- Verified Stadium dataclass in core.py already has `year_opened: Optional[int] = None`
- Added year_opened to all hardcoded stadium dictionaries
- Updated Stadium object creation in all 4 modules to pass year_opened

## Files Modified

- `Scripts/mlb.py` - Added year_opened to 30 ballparks, updated Stadium creation
- `Scripts/nba.py` - Added year_opened to 30 arenas, updated Stadium creation
- `Scripts/nhl.py` - Added year_opened to 32 arenas, updated Stadium creation
- `Scripts/nfl.py` - Added year_opened to 30 stadiums, updated Stadium creation

## Decisions Made

- Used original opening years (not renovation years) for historical accuracy
- Stadium dataclass already supported year_opened field - no changes needed to core.py

## Issues Encountered

None - all expected stadium counts matched, all fields present.

## Next Step

Ready for 02-02-PLAN.md (pipeline regeneration)