fix: align cron session key routing (#18637) (thanks @vignesh07)

src/agents/tools/cron-tool.flat-params.test.ts

@@ -0,0 +1,36 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const callGatewayMock = vi.fn();
+vi.mock("../../gateway/call.js", () => ({
+  callGateway: (opts: unknown) => callGatewayMock(opts),
+}));
+
+vi.mock("../agent-scope.js", () => ({
+  resolveSessionAgentId: () => "agent-123",
+}));
+
+import { createCronTool } from "./cron-tool.js";
+
+describe("cron tool flat-params", () => {
+  beforeEach(() => {
+    callGatewayMock.mockReset();
+    callGatewayMock.mockResolvedValue({ ok: true });
+  });
+
+  it("preserves explicit top-level sessionKey during flat-params recovery", async () => {
+    const tool = createCronTool({ agentSessionKey: "agent:main:discord:channel:ops" });
+    await tool.execute("call-flat-session-key", {
+      action: "add",
+      sessionKey: "agent:main:telegram:group:-100123:topic:99",
+      schedule: { kind: "at", at: new Date(123).toISOString() },
+      message: "do stuff",
+    });
+
+    const call = callGatewayMock.mock.calls[0]?.[0] as {
+      method?: string;
+      params?: { sessionKey?: string };
+    };
+    expect(call.method).toBe("cron.add");
+    expect(call.params?.sessionKey).toBe("agent:main:telegram:group:-100123:topic:99");
+  });
+});

src/agents/tools/cron-tool.ts

@@ -299,6 +299,7 @@ Use jobId as the canonical identifier; id is accepted for compatibility. Use con
               "description",
               "deleteAfterRun",
               "agentId",
+              "sessionKey",
               "message",
               "text",
               "model",