Reflection, and the mirror that arbitrates.
MYTHOS is the constitutional reflection layer. It carries symbolic reflection over what the runtime does, and through its CT-Mirror it performs ethical arbitration and cross-system validation, a second, independent reading that checks the architecture against itself.
MYTHOS sits as the reflection layer over the runtime, with the CT-Mirror as its arbitration surface, governed by the constitutional stack and recorded by the evidence layer.
MYTHOS reflects on the runtime and its CT-Mirror arbitrates across systems. Where a decision needs a second, independent reading, MYTHOS provides it under the same constitutional constraints.