This chapter contributes to emerging debates on “design for policy from below” (Vaz et al., 2022) by examining a long-term collaboration between a multidisciplinary network of researchers, designers, community mobilisers, and social workers advocating for public security rights in Maré, a group of sixteen favelas (informal settlements) in the North Zone of Rio de Janeiro, Brazil. Since its formation in the 1940s, Maré has been shaped by grassroots resistance to state violence and policies of dispossession (Gonçalves, 2013; Harvey, 2012), with the local organisation Redes da Maré playing a central role in advancing residents’ rights through socio-spatial and political action. In recent years, amid intensified militarisation following the collapse of the Pacifying Police Unit (UPP) programme in 2014, Redes da Maré has developed the Boletim Direito a Segurança Pública e Acesso à Justiça na Maré (Bulletin Right to Public Security in Maré) – a bulletin that compiles and analyses on-the-ground data to expose the contradictions in state-led public security policies. As the lead visual designer for the bulletin since 2020, I reflect on how design practices can contribute to community-driven policy advocacy. Grounded in feminist pedagogy (hooks, 1994; Freire, 2019) and militant design practices (Serpa, 2023), this chapter traces the political, visual, and collaborative dimensions of the bulletin’s production. Drawing on archival analysis, participatory and ethnographic research reflections from my doctoral research (Montuori, 2023), I explore the opportunities and limitations of design as a tool (Kimbell and Vesnic-Alujevic, 2020) for constructing counter-narratives, mobilising collective agency, and challenging hegemonic representations of life in the favelas. Ultimately, this chapter reveals how design, embedded in long-standing community struggles, can serve as both a representational and strategic practice in the pursuit of justice.