In this paper, we present a framework to support people to organise tools for creating a commons infrastructure. A commons is a shared resource governed by a community of people rather than solely a government entity or private company. The commons literature offers robust frameworks for analysing an existing commons but lacks approaches to support communities to create a commons. To address this gap, we turn to co-design as an approach to developing processes that support communities to create a commons. This paper builds on an established framework used to analyse an existing commons to propose a new framework to organise tools for co-designing a commons. To explore this framework, we apply it as a lens to consider three engagement tools used for the transition of libraries into neighbourhood centres. The framework offers an approach for communities to build commoning processes to manage resources produced as part of co-design projects.