Function stem

src/context/approach-recall.ts:19–29

(word: string)

 */
const SUFFIXES = ['ation', 'ising', 'izing', 'ings', 'ing', 'ers', 'ies', 'er', 'ed', 'es', 'ate', 'ly', 's'];
export function stem(word: string): string {
  if (word.length <= 4) return word;
  for (const suf of SUFFIXES) {
    if (word.endsWith(suf) && word.length - suf.length >= 3) {
      let root = word.slice(0, word.length - suf.length);
      if (suf === 'ies') root += 'y';           // categories → category
      return root;
    }
  }
  return word;
}

/** Tokenize + stem — the recall ranker's semantic-lexical vocabulary. PURE. */
export function semanticTokens(text: string): string[] {