The most important project for a design studio is the design of the practice itself. A studio’s point of view is often first defined by feelings and hopes, but if cultivated, grows into values and tactics. How the studio environment is crafted and how it cultivates a kinship around this point of view with collaborators, clients, consultants, community members, and contractors is essential for it to be productive and have a healthy impact. With discipline, a studio evolves a practice that shapes the character, performance, and value of the work. The studio’s early critiques define the approach and territory of work and the propositions that are asked of every project. The studio environment and relationships create the space for the work to be possible.  Nine Propositions and fifty-three Foundations are shared herein and are presented as a work in progress. Each Foundation additionally includes a supporting commentary. These are lists that chronicle the firms thinking and doing over 25 years. For Duvall Decker, there is no separation between theory and practice. This collection of Foundations and Propositions captures an approach to the work and way of being an architect. This work is a privilege with public responsibilities. This is one studio’s search for public good.