TokenCategory

type TokenCategory =
  | "number"
  | "string"
  | "keyword"
  | "operator"
  | "comparison"
  | "bitwise"
  | "function"
  | "variable"
  | "unit"
  | "datetime"
  | "vector"
  | "punctuation"
  | "error"
  | string & {
};

Defined in: packages/engine/src/language/TokenCategory.ts:16

Editor-agnostic semantic classification for a lexer token.

This is the entire contract solve-js’s language service exposes to any editor integration (CodeMirror, VS Code, …): a category, nothing about how it should be rendered. CSS class names, VS Code semantic-token indices, etc. are all downstream adapter concerns. See language/adapters/.

The built-in categories cover every core (non-plugin) token type. Solve-js packages may contribute additional, open-ended category strings for their own custom token types (see registerTokenCategory in TokenCategoryMap.ts) , the (string & {}) union member keeps those assignable without widening the whole type to a bare string and losing autocomplete for the built-ins.