In 2015, the UN Security Council unanimously passed Resolution 2250 on Youth, Peace, and Security (YPS), formalizing an agenda for positive youth participation in peace and security. However, youth peace activists have been leading peacebuilding long before this institutional recognition. This article explores the dynamics of how advocates and institutional actors conceptualize and negotiate compromise. To do this, it draws on in-depth interviews with youth and adult YPS advocates, a critical analysis of documents related to the agenda, and extended participant observation. It explores and develops a notion of a field of youth-oriented peacebuilding, drawing on Bourdieu. This makes visible a more complex field of struggle, showing how compromise can help explain how youth actively negotiate their participation in formalized agendas and persist in their own peacebuilding ambitions. It argues for a more nuanced understanding of compromise to understand the affordances and limitations of youth agency and institutional agendas.