  The advent of personalized reality has arrived. Rapid development in AR/MR/VR
enables users to augment or diminish their perception of the physical world.
Robust tooling for digital interface modification enables users to change how
their software operates. As digital realities become an increasingly-impactful
aspect of human lives, we investigate the design of a system that enables users
to manipulate the perception of both their physical realities and digital
realities. Users can inspect their view history from either reality, and
generate interventions that can be interoperably rendered cross-reality in
real-time. Personalized interventions can be generated with mask, text, and
model hooks. Collaboration between users scales the availability of
interventions. We verify our implementation against our design requirements
with cognitive walkthroughs, personas, and scalability tests.
