sclass CtxContext {
  // general for bot
  SS regexpMacros, globals;

  // per session
  S activeRule;
  
  S input;
  new StringBuilder newOutput;
  
  bool jumpaway;
  S nextRule;
  int safetyCounter; // number of rules applied in step
  
  void setActiveRule(S rule) {
    activeRule = rule;
  }
}