sashite-cgsn

https://github.com/sashite/cgsn.rb

CGSN (Chess Game Status Notation) provides a rule-agnostic taxonomy of observable game status values for abstract strategy board games. This gem implements the CGSN Specification v1.0.0 with a minimal Ruby interface featuring immutable status objects and functional programming principles. CGSN defines standardized identifiers for terminal conditions (checkmate, stalemate, bareking, mareking, insufficient), player actions (resignation, agreement, illegalmove), and temporal constraints (timelimit, movelimit, repetition), enabling precise and portable status identification across multiple games and variants. Perfect for game engines, notation systems, and hybrid gaming platforms requiring consistent, rule-agnostic game state representation.