fix: route system events per session

src/infra/system-events.test.ts

@@ -0,0 +1,64 @@
+import { beforeEach, describe, expect, it } from "vitest";
+
+import { prependSystemEvents } from "../auto-reply/reply/session-updates.js";
+import type { ClawdbotConfig } from "../config/config.js";
+import {
+  enqueueSystemEvent,
+  peekSystemEvents,
+  resetSystemEventsForTest,
+} from "./system-events.js";
+
+const cfg = {} as unknown as ClawdbotConfig;
+
+describe("system events (session routing)", () => {
+  beforeEach(() => {
+    resetSystemEventsForTest();
+  });
+
+  it("does not leak session-scoped events into main", async () => {
+    enqueueSystemEvent("Discord reaction added: ✅", {
+      sessionKey: "discord:group:123",
+      contextKey: "discord:reaction:added:msg:user:✅",
+    });
+
+    expect(peekSystemEvents()).toEqual([]);
+    expect(peekSystemEvents("discord:group:123")).toEqual([
+      "Discord reaction added: ✅",
+    ]);
+
+    const main = await prependSystemEvents({
+      cfg,
+      sessionKey: "main",
+      isMainSession: true,
+      isNewSession: false,
+      prefixedBodyBase: "hello",
+    });
+    expect(main).toBe("hello");
+    expect(peekSystemEvents("discord:group:123")).toEqual([
+      "Discord reaction added: ✅",
+    ]);
+
+    const discord = await prependSystemEvents({
+      cfg,
+      sessionKey: "discord:group:123",
+      isMainSession: false,
+      isNewSession: false,
+      prefixedBodyBase: "hi",
+    });
+    expect(discord).toBe("System: Discord reaction added: ✅\n\nhi");
+    expect(peekSystemEvents("discord:group:123")).toEqual([]);
+  });
+
+  it("defaults system events to main", async () => {
+    enqueueSystemEvent("Node: Mac Studio");
+
+    const main = await prependSystemEvents({
+      cfg,
+      sessionKey: "main",
+      isMainSession: true,
+      isNewSession: false,
+      prefixedBodyBase: "ping",
+    });
+    expect(main).toBe("System: Node: Mac Studio\n\nping");
+  });
+});