Status: IN
The architecture constrains its state space through complementary entry and progression mechanisms: perimeter normalization restricts what enters the system (clean, canonicalized inputs only), and forward-only design restricts how state evolves (monotonically, irreversibly, without regression) — together defining a wedge-shaped state space that narrows at entry and only expands forward.
Perimeter normalization bounds entry, forward-only design bounds progression — joint state-space constraint
Depends on (SL): boundary-normalization-serves-defense-and-correctness, forward-only-preserves-correctness-despite-accepted-gaps