The pre-push gate rejected the T-1213 push on a wall-clock fog budget (0.606 vs 0.5 ms) that passes 23/23 in isolation on the same build. Second hardening cycle for the same failure mode: min-of-7 defends against one slow sample, not the sustained core saturation the gate itself creates by running cargo and tooling suites immediately before it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>