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updates to copilot instructions #46

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JeffML merged 1 commit into from
Feb 22, 2026
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updates to copilot instructions #46

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4 changes: 2 additions & 2 deletions .github/copilot-instructions.md
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Expand Up @@ -12,7 +12,7 @@ This is a **data-only repository** containing 12,000+ chess opening variations e
- **eco_interpolated.json**: Generated variations that bridge gaps between named openings
- **fromTo.json**: Array of `[from_fen, to_fen, from_source, to_source]` representing opening transition graph
- **fromToPositionIndexed.json**: Pre-indexed transition data (optimized for O(1) position lookups)
- **scores.json**: Position evaluation scores in centipawns (generated by eco.json.tooling)
- **scores.json**: Position evaluation scores in pawns (1.00 = 100 centipawns, generated by eco.json.tooling)

### Opening Object Schema

Expand Down Expand Up @@ -189,7 +189,7 @@ The npm package provides `getFromTos(fen)` which:
## Important Notes

- Opening data files (ecoA-E.json, eco_interpolated.json, fromTo.json) are the core assets
- Published files for download: fromToPositionIndexed.json (3.7 MB), scores.json (1.2 MB)
- Published files for download: fromToPositionIndexed.json, scores.json
- The npm package provides TypeScript types and utilities for consuming this data
- All openings use standard algebraic notation (SAN) for moves
- ECO codes are categories, not unique identifiers - many openings share the same ECO code
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