diff --git a/AGENTS.md b/AGENTS.md
index 3d84d142d..00d301068 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -249,7 +249,9 @@ calling it a regression, and treat CI as authoritative.**
   Because this is a **gate** workflow whose `failure` conclusion is intentional enforcement (it blocks a
   bad PR), it is exempt from the Fleet Monitor's high-failure issue tracking via `FLEET_GATE_WORKFLOWS`
   in `scripts/fleet_report.sh` (#941) — otherwise a guard doing its job produces false-positive trackers.
-  `holdout-guard.yml` is exempt for the same reason. Add new gate workflows of this class to that list.
+  `holdout-guard.yml` and `sync-scope-guard.yml` (which fails closed on a sync PR with no declared-paths
+  manifest or an out-of-scope diff, #1700/#2373) are exempt for the same reason. Add new gate workflows of
+  this class to that list.
 - **Exception:** `pr-review-sweep.yml` (stuck-review sweep, #573/#898) is a documented repo-specific
   workflow with no corresponding org template in `standards/workflows/`. It re-dispatches reviews for PRs
   that went green after a ci-pending/ci-failing skip, via two triggers: a scheduled cron (the EVENTUAL
diff --git a/scripts/fleet_report.sh b/scripts/fleet_report.sh
index e9a6be027..64e066770 100755
--- a/scripts/fleet_report.sh
+++ b/scripts/fleet_report.sh
@@ -13,7 +13,7 @@
 # (#941). Matched by workflow file basename. See AGENTS.md "Exception:
 # test-deletion-guard.yml". Override via env with the full space-separated
 # gate list for testing; add permanent gates to the default below.
-FLEET_GATE_WORKFLOWS="${FLEET_GATE_WORKFLOWS:-test-deletion-guard.yml holdout-guard.yml}"
+FLEET_GATE_WORKFLOWS="${FLEET_GATE_WORKFLOWS:-test-deletion-guard.yml holdout-guard.yml sync-scope-guard.yml}"
 
 # Dev-Lead status-marker prefix (#1019, story C of #901). Mirrors
 # ISSUE_MARKER_PREFIX in dev-lead-fix-issue.sh / dev-lead-retry.sh: every
diff --git a/tests/fleet_report.bats b/tests/fleet_report.bats
index 9fefb184c..34b21f1be 100755
--- a/tests/fleet_report.bats
+++ b/tests/fleet_report.bats
@@ -314,6 +314,16 @@ _mk_metrics() {
   rm -f "$m"
 }
 
+@test "filter_high_failure: sync-scope-guard gate over 10% is excluded (#2373)" {
+  local m
+  m="$(_mk_metrics \
+    $'1\tcombsmith/.github-private\t.github/workflows/sync-scope-guard.yml\t8\t4\t2\t2\t25.0%\t25\t1380\tDEGRADED\t25')"
+  run filter_high_failure "$m"
+  [ "$status" -eq 0 ]
+  [ "$(echo "$output" | jq 'length')" -eq 0 ]
+  rm -f "$m"
+}
+
 @test "filter_high_failure: non-gate workflow over 10% is still tracked" {
   local m
   m="$(_mk_metrics \