static L<S> websPostedIn() {
  new Matches m;
  new L<S> programsToScan;
  for (S s : listFileNames(getProgramDir(circlesEditorDBID()))) pcall {
    if (swic(s, "webs.posted.at.", m))
      programsToScan.add(fsI($1));
  }
  ret programsToScan;
}