Find the appropriate knot within the timing cluster
The previous check stopped at a packet boundary whose left side was still nonstationary. An exceptionally close neighboring boundary remained unchecked. This study uses the existing complete-cluster search to find a negative-to-positive timing-slope change nearby, then applies the unchanged two-sided stopping test.
It checks the same two preserved endpoints and two fresh controls. Its ceiling is 58 native calls, four numerical threads and zero nonlinear optimizer starts, with no retries. All twelve software checks passed. Both source-to-final movement and endpoint repeat agreement remain required. Earlier failures remain unchanged.