This site describes solve-engine as it is on main: 2.43.0, which npm does not have yet. npm installs 2.40.0, so a page may show an answer that version does not give yet.
BUILTIN_PHRASES
const BUILTIN_PHRASES: Record<string, string>;Defined in: packages/engine/src/lexer/BuiltinPhrases.ts:14
Built-in phrase → token type. See the module doc.