Project C1 provides programming abstractions enabling perspicuity at the implementation level for CPS applications acting on the physical world. We will integrate stream-based monitoring languages with system models, bringing together abstraction-based synthesis and stream-based implementations. To improve trust in monitored data as well as to satisfy requirements at inspection-time, we will develop a verifying compiler for monitoring, enabling us to provide high confidence in captured behaviours, and to guarantee system-level requirements such as privacy. We develop immersive user interfaces for inspection and human oversight, leveraging counterfactual analysis for immersive what-if-analysis, combined with mission-level strategies that build on stream visualisation techniques.