The goal of this workshop is to raise awareness, spark discussion, and start shaping a research agenda in the field of Sustainable HCI. There are three interrelated imperatives for this Post Sustainability workshop. First motivated by the desire to move sustainable HCI (or Sustainable Interaction Design SID) "beyond persuasion". Second, the desire to move the sustainability of SID beyond an overly simplistic focus on single resource reduction. Third, the challenge of adaption to environmental impacts on society, potentially including societal contraction or collapse. The workshop will consist of a structured brainstorming session to construct a research agenda and then participants will, in groups, begin to develop action plans to realise this agenda.