Adjudication logic for the Sanki game suite over an abstract event model, built for Sashité.

Rules engine for the Sanki game suite (chess/ogi/xiongqi on 8×8), built for Sashité.

Canonical reader for Sashité's premium allow-list: parse the admission service's premium-pubkey file into an in-memory, hot-reloadable set shared identically by every Sashité service.

Pair Open Challenges into Pairings (kinds 6418/6419) for Nostr: a game-agnostic matchmaking primitive for two-player abstract strategy board games of the chess family.

Build and validate Event Timestamp Attestations (kind 1041) for Nostr: a lightweight, trusted-signer event-timestamping primitive complementary to NIP-03.

A minimal, format-agnostic Ruby library for representing positions in two-player, turn-based board games (chess, shogi, xiangqi, and variants).

QPI (Qualified Piece Identifier) implementation for Ruby with immutable identifier objects.

Build and validate Elo Rating Attestations (kind 6426) for Nostr, and compute the Elo update: a lightweight, trusted-signer rating primitive for two-player games.

A minimal, format-agnostic Rust library for representing positions in two-player, turn-based board games (chess, shogi, xiangqi, and variants).

FEEN support for the Rust language.