Status: IN
The architecture bounds state space through complementary entry and progression mechanisms (perimeter normalization restricts what enters, forward-only progression constrains evolution) while the two-tier state model ensures bounding never sacrifices authority: deterministic truncation and probabilistic approximation affect only derived/cached state (deques, HLL registers), never authoritative state (ledgers, version histories, tombstones).
both depth-7 and unused; combining reveals that state bounding is selective — the architecture bounds growth without corrupting the authoritative record
Depends on (SL): perimeter-and-forward-only-jointly-bound-state-space, two-tier-state-preserves-authority-under-monotonicity