This article analyzes the evolution of the network of Brazilian federal accountability institutions over the course of the past generation, between the transition to democracy and the end of President Luiz Inácio Lula da Silva's second term. Substantively, the article charts the significant gains that have been made in accountability institutions. Theoretically, it evaluates the evolution of these institutions as a consequence of the distribution of rules, routines, roles, and resources across a larger institutional network, demonstrating that changes in the various bureaucratic agencies have mutually reinforced each other and generated autocatalytic processes of reform.