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0.0
PNN (Piece Name Notation) provides a rule-agnostic, scalable naming system for identifying
abstract strategy board game pieces. This gem implements the PNN Specification v1.0.0 with
a modern Ruby interface featuring immutable piece name objects and functional programming
principles. PNN uses canonical ASCII names with optional state modifiers and optional terminal
markers (e.g., "KING", "queen", "+ROOK", "-pawn", "KING^", "+GENERAL^") to unambiguously
refer to game pieces across variants and traditions. Ideal for engines, protocols, and tools
that need clear and extensible piece identifiers.
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