site.pp

# special bots
node /bots(32|26)/ {
  # make sure our base profile is applied first:
  anchor { 'bots-begin': } ->
  class { 'base': } ->
  # These bots are speshul:
  class { 'specialbot': } ->
  anchor { 'bots-end': }
}

# all other bots:
node /bots.*/ {
  # make sure our base profile is applied first:
  anchor { 'bots-begin': } ->
  class { 'base': } ->
  # then, the bot stuff:
  class { 'bot': } ->
  anchor { 'bots-end': }
}