Stockfish.js 18 lite single-threaded — unmodified release v18.0.0

Engine copyright: Stockfish contributors and Chess.com, LLC.
Engine license: GNU GPL version 3; see Copying.txt and AUTHORS.txt.
Neural network by Linmiao Xu (linrock), distributed under CC0.

Upstream project: https://github.com/nmrugg/stockfish.js
Release: https://github.com/nmrugg/stockfish.js/releases/tag/v18.0.0
The runtime files stockfish-18-lite-single.js and .wasm are unchanged release assets.

Corresponding source is supplied alongside this file:
  stockfish-v18.0.0-source.tar.gz
  nn-9067e33176e8.nnue (required build input)
Extract the source archive and place the network in src/nn-9067e33176e8.nnue.
Use Emscripten 3.1.7 and Node.js, then run from the extracted root:
  node build.js --lite --single-threaded --no-split --force
The upstream source includes the build scripts and uglify-js dependency.

Network source:
  https://tests.stockfishchess.org/api/nn/nn-9067e33176e8.nnue
The network SHA256 begins 9067e33176e8 (matching the required source filename).
CC0 dedication: https://creativecommons.org/publicdomain/zero/1.0/
Network licensing: https://official-stockfish.github.io/docs/fishtest-wiki/Creating-my-first-test.html#nnue-net-tests

Application difficulty presets are training settings, not measured human Elo ratings.
The engine operates in a dedicated browser Worker; no OpenAI API is used for play.