Status: OUT
Streaming's structural boundary handling (sentinel initialization + early exit) combined with observed crash-freedom for degenerate inputs jointly establish that the streaming paradigm handles all boundary conditions without conditional logic — provided no degenerate input (single-element, empty, zero) escapes the sentinel+early-exit net.
boundary completeness is contingent on no degenerate input escaping the sentinel+early-exit net
Depends on (SL): streaming-boundary-handling-structurally-complete, edge-case-inputs-crash-free