In recent years, urban contexts and urban-rural linkages have become central for scholars and activists engaged in agrarian questions, agroecological transitions and food system transformation. Grassroots experimentations in urban agroecology and farmers' engagement with urban policies have marked the rise of a new agenda aiming to bridge urban and agrarian movements. Departing from the work of Eric Holt-Gimenez and Annie Shattuck, this paper argues that the way urban-rural links have been conceptualized is occasionally progressive, and that an agroecology-informed food system transformation needs radical approaches. Acknowledging that processes of urbanization are dynamic, driven by specific lifestyles, consumption patterns, and value orientationsproducing ongoing suburbanization, land enclosures, farmers displacement and food-knowledge lossthe paper argues that thinking transitions through new rural-urban links is unfit to tackle the evolving nature of these geographies, and reproduces the distinction between consumers and producers, living on either side of what Mindi Schneider and Philip McMichael have described as an epistemic and ecological rift. Building on insights from four case-studies across global north and south, the paper reframes agroecological transitions as a paradigmatic change in biopolitical spatial relations, economic values and planning agencywhat we call an 'agroecological urbanism'. The paper articulates a transformation agenda addressing urban nutrients, peri-urban landuse, community food pedagogies and farmers' infrastructure.