diff --git a/packages/cli/test/lib/api/alerts.test.ts b/packages/cli/test/lib/api/alerts.test.ts
index 469ceccc5..dc76f26a5 100644
--- a/packages/cli/test/lib/api/alerts.test.ts
+++ b/packages/cli/test/lib/api/alerts.test.ts
@@ -604,6 +604,38 @@ describe("createMetricAlertRule", () => {
     ]);
   });
 
+  test("drops empty trigger actions from detector conditions", async () => {
+    let sentBody: Record<string, unknown> = {};
+    globalThis.fetch = mockFetch(async (input, init) => {
+      sentBody = (await new Request(input!, init).json()) as Record<
+        string,
+        unknown
+      >;
+      return Response.json(metricDetector({ id: "1" }), { status: 201 });
+    });
+
+    await createMetricAlertRule("test-org", {
+      name: "Error spike",
+      query: "is:unresolved",
+      aggregate: "count()",
+      dataset: "errors",
+      timeWindow: 5,
+      triggers: [
+        { label: "critical", alertThreshold: 11, actions: [] },
+        { label: "warning", alertThreshold: 5, actions: [] },
+      ],
+      projects: ["backend"],
+    });
+
+    expect(
+      (sentBody.conditionGroup as Record<string, unknown>).conditions,
+    ).toEqual([
+      { type: "gt", comparison: 11, conditionResult: 75 },
+      { type: "gt", comparison: 5, conditionResult: 50 },
+      { type: "lte", comparison: 11, conditionResult: 0 },
+    ]);
+  });
+
   test("passes native detector conditions through unchanged", async () => {
     let sentBody: Record<string, unknown> = {};
     globalThis.fetch = mockFetch(async (input, init) => {
diff --git a/packages/cli/test/types/metric-alert.test.ts b/packages/cli/test/types/metric-alert.test.ts
index f918ed4d3..1f772dce4 100644
--- a/packages/cli/test/types/metric-alert.test.ts
+++ b/packages/cli/test/types/metric-alert.test.ts
@@ -87,6 +87,20 @@ describe("parseMetricTriggers", () => {
     ).not.toThrow();
   });
 
+  // Older CLI releases required a non-empty `actions` array on each trigger
+  // (CLI-20K). Callers still send `actions: []`; it must parse, not fail.
+  test("passes threshold triggers with an empty actions array", () => {
+    expect(
+      parseMetricTriggers([
+        { label: "critical", alertThreshold: 11, actions: [] },
+        { label: "warning", alertThreshold: 5, actions: [] },
+      ]),
+    ).toEqual([
+      { label: "critical", alertThreshold: 11, actions: [] },
+      { label: "warning", alertThreshold: 5, actions: [] },
+    ]);
+  });
+
   test("rejects trigger actions, pointing at --workflow", () => {
     expect(() =>
       parseMetricTriggers([