Nomad changes

scripts/benchmarks/ensure-benchmark-harness-exists.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+
+source "${REPO_ROOT}/scripts/lib/common.sh"
+
+validate_repo_root "$REPO_ROOT" || exit 1
+
+if [ ! -d "$REPO_ROOT/tools/benchmark-harness" ]; then
+  echo "::error::tools/benchmark-harness not found on branch ${GITHUB_REF}." >&2
+  exit 1
+fi
+
+echo "✓ Benchmark harness directory verified at: $REPO_ROOT/tools/benchmark-harness"