Deliberative processes are an antidote to despair about the inadequacies of politics-as-usual, but the “deliberative wave” (OECD 2021) of these initiatives around the globe has the potential, in some contexts, to be the latest face of colonization. In Aotearoa New Zealand, one project has worked since 2019 to design a climate assembly that enacts Te Tiriti o Waitangi (1840) obligations to honour Māori political authority. This article outlines the project's three innovations to the citizens’ assembly design that centre Māori forms of governance and reflect Māori deliberative protocols, and highlights three important distinctions to how a group of tangata Tiriti (people of the Treaty) has worked in partnership with tangata whenua (people of the land). Each feature has been vital to becoming Te Tiriti-led despite a context of ongoing colonization, with this place-based assembly having major implications for deliberation theory and practice worldwide.