Status: OUT
Safety enforcement is both locally scoped (error contracts vary by module with no cross-cutting convention) and default-permissive (access control favors availability over restriction), producing a system where each module is individually lenient and no cross-cutting safety net catches errors that escape module boundaries.
Module-local error boundaries + permissive security defaults = no cross-cutting safety net for callers
Depends on (SL): error-boundaries-are-module-local, default-to-permissive-across-security-dimensions