We challenge you to adapt to the city of Lisbon a set of open-source cards that are urban design guidelines and cover essential and idiosyncratic city topics. The aim is to facilitate a common vocabulary to empower collective imagination with a tool that is a proactive game for citizens, experts and municipalities to build urban solutions together. In this workshop we will build a prototype with specific examples from the city. HEY! Imaginable Guidelines is an original project by SANALarc studio in Istanbul that is being developed in Lisbon by the Triennale with the Observatório Urbano collective.