Emily Campbell, designer and writer, on AI’s position in the design stack:
AI asks designers to go one layer deeper again: into the model, the harness, the context, the policies, and the emergent behaviors that produce the experience before it ever reaches the interface.
Jesse James Garrett’s The Elements of User Experience asked designers to look past the surface layer they owned. Jamie Mill’s The Elements of Product Design asked them to look past the product and into the conditions around it. Campbell maps the next step in that arc with a six-layer architecture: User Interface, Context, Harness, Model, Governance, Emergence.
We cannot control for every outcome directly through the interface, but we can design the conditions that shape a model’s generation. In that regard, the work of design looks less like specifying every expected state, as Garrett’s model encouraged, and instead closer resembles system design, identifying and manipulating the leverage points in a system that exist in the layers below the surface.
Of the six layers, governance puts designers in the least comfortable position. The rules that shape AI behavior often come from legal, compliance, security, and executive choices before the interface team ever sees them. When that reasoning is not documented for the people designing the experience, assumptions pile up and harden into product behavior. Campbell’s conclusion is about fluency, not ownership:
The expectation going forward should not be that every designer works across every layer. Full-stack AI designers need to have a general fluency across all inputs into the experience, so they can influence, mitigate, or receive the impacts that upstream work has on the end experience.
[…] Technical designers are more likely to focus on the Model, Harness, and Context levels, and the role is more than just “design engineer”. Other designers may focus further down the stack, as we might see design-specific titles pop up in policy making and emergent research (these roles exist today, under titles like “business designer”, but have not reached critical mass within the industry). And of course, classical design will remain, but its workflows, tools, and outputs will evolve.
