test(extensions): split outbound payload contracts

extensions/slack/src/outbound-payload.contract.test.ts

@@ -0,0 +1,11 @@
+import { installChannelOutboundPayloadContractSuite } from "openclaw/plugin-sdk/testing";
+import { describe } from "vitest";
+import { createSlackOutboundPayloadHarness } from "./outbound-payload.test-harness.js";
+
+describe("Slack outbound payload contract", () => {
+  installChannelOutboundPayloadContractSuite({
+    channel: "slack",
+    chunking: { mode: "passthrough", longTextLength: 5000 },
+    createHarness: createSlackOutboundPayloadHarness,
+  });
+});