Function extractCodeTokens

src/directory.ts:479–497

(prompt: string)

 * is excluded from the member-access form since it's a file reference, not a symbol.
 */
export function extractCodeTokens(prompt: string): string[] {
  if (!prompt) return [];
  const out = new Set<string>();
  // camelCase / PascalCase-with-inner-cap (getUserId, parseToken, UserService) or
  // snake_case (article_publish, get_user) — a whole identifier run that has an
  // inner lower→upper transition or an underscore flanked by alphanumerics.
  for (const m of prompt.matchAll(/[A-Za-z_$][\w$]*/g)) {
    const w = m[0];
    if (/[a-z][A-Z]/.test(w) || /[A-Za-z0-9]_[A-Za-z0-9]/.test(w)) out.add(w);
  }
  // call form: an identifier directly before '(' — parseToken(, render(). No
  // whitespace before '(' so prose like "the function (entry point)" doesn't trip it.
  for (const m of prompt.matchAll(/([A-Za-z_$][\w$]*)\(/g)) out.add(m[1]!);
  // member access on identifiers (user.login) — but not a doc/data filename.
  for (const m of prompt.matchAll(/([A-Za-z_$][\w$]*)\.([A-Za-z_$][\w$]*)/g)) {
    if (!DOC_DATA_EXT.test(m[0])) { out.add(m[1]!); out.add(m[2]!); }
  }
  return [...out];
}

/**
 * Cheap, graph-free candidate gate for the front-load hook: could `prompt` be a