external-surface-is-verified-trust-bounded-and-bidirectionally-controlled
OUT derived (depth 9)
The system's complete external perimeter achieves defense-in-depth through three independently-established properties: structural verification (pure delegation with hermetic tests), trust boundaries (self-containment and defensive ingestion), and bidirectional flow control (token budgets constraining output, hardened LLM integration constraining input) — no external interaction bypasses all three layers.
Summary
Every point where the system touches the outside world is protected by three independent safety layers — verified code with tests, enforced trust boundaries, and controls on data flowing in both directions. Nothing can cross the perimeter without passing through at least one of these layers, so a failure in any single layer does not leave an unguarded path. This is currently unsupported because one or both of its foundation claims about interface flow control or the combined verification-and-trust property do not hold.
Justifications
SL — Verification ensures correctness, trust bounds prevent escalation, and bidirectional control constrains volume — three independent perimeter defenses from two convergent chains
Antecedents (all must be IN):
- verified-interface-controls-bidirectional-flow — All information flowing through the system's verified, fault-tolerant user interface is controlled in both directions: inbound through production-hardened LLM integration with bounded execution and fail-soft semantics, outbound through deterministic authorized access-controlled output — the verified interface serves as a trustworthy gateway that neither admits uncontrolled inputs nor emits unauthorized outputs.
- external-surface-is-verified-and-trust-bounded — The complete external-facing surface achieves both structural verification (pure delegation with hermetic tests and fault tolerance across all information paths) and comprehensive trust enforcement (architectural self-containment with information flow control at every boundary) — no external interaction bypasses either the verification chain or trust controls.
Dependents
These beliefs depend on this one:
- external-lifecycle-is-deterministic-and-trust-bounded — External beliefs follow a fully deterministic lifecycle from ingestion through ongoing maintenance, enclosed within verified trust boundaries at every phase: structural verification with trust-bounded bidirectional flow control at the perimeter, and deterministic architecturally-grounded lifecycle management governing internal state trajectories.