This article considers how course design accommodates the adaptation of L2 students into the early stages of the master's dissertation (Social Sciences and Humanities) at a UK university. I present a contrastive process-oriented analysis of two students' experiences on different courses, extracted from a 13-month ethnographic study in which students' self-reports (journals; interviews) were triangulated with their assignments, interviews with lecturers and classroom observation. I identify two "literacy events" in the early stages: discussing the topic and preparing the proposal. In order to make visible these events, I deploy Lave and Wenger's Community of Practice model, while taking a post-structuralist view of learning as a dynamic between language, identities, power relations, affordances and agency. Findings show unequal support for these events on the two courses; I argue that this exemplifies significantly different ideologies relating to the accommodation of L2 students, and discuss implications for course design.