Cover live-run polling cap

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/__tests__/agent-live-run-routes.test.ts

@@ -10,7 +10,6 @@ const mockHeartbeatService = vi.hoisted(() => ({
   buildRunOutputSilence: vi.fn(),
   getRunIssueSummary: vi.fn(),
   getActiveRunIssueSummaryForAgent: vi.fn(),
-  buildRunOutputSilence: vi.fn(),
   getRunLogAccess: vi.fn(),
   readLog: vi.fn(),
 }));
@@ -71,7 +70,7 @@ function registerModuleMocks() {
   }));
 }
 
-async function createApp() {
+async function createApp(db: Record<string, unknown> = {}) {
   const [{ agentRoutes }, { errorHandler }] = await Promise.all([
     vi.importActual<typeof import("../routes/agents.js")>("../routes/agents.js"),
     vi.importActual<typeof import("../middleware/index.js")>("../middleware/index.js"),
@@ -88,11 +87,32 @@ async function createApp() {
     };
     next();
   });
-  app.use("/api", agentRoutes({} as any));
+  app.use("/api", agentRoutes(db as any));
   app.use(errorHandler);
   return app;
 }
 
+function createLiveRunsDbStub(rows: Array<Record<string, unknown>>) {
+  const limit = vi.fn(async (value: number) => rows.slice(0, value));
+  const orderedQuery = {
+    limit,
+    then: (resolve: (value: Array<Record<string, unknown>>) => unknown) => Promise.resolve(rows).then(resolve),
+  };
+  const query = {
+    from: vi.fn().mockReturnThis(),
+    innerJoin: vi.fn().mockReturnThis(),
+    where: vi.fn().mockReturnThis(),
+    orderBy: vi.fn().mockReturnValue(orderedQuery),
+  };
+
+  return {
+    db: {
+      select: vi.fn().mockReturnValue(query),
+    },
+    limit,
+  };
+}
+
 async function requestApp(
   app: express.Express,
   buildRequest: (baseUrl: string) => request.Test,
@@ -284,4 +304,43 @@ describe("agent live run routes", () => {
       nextOffset: 5,
     });
   });
+
+  it("caps company live run polling by default", async () => {
+    const rows = Array.from({ length: 75 }, (_, index) => ({
+      id: `run-${index}`,
+      companyId: "company-1",
+      status: "running",
+      invocationSource: "on_demand",
+      triggerDetail: "manual",
+      startedAt: new Date("2026-04-10T09:30:00.000Z"),
+      finishedAt: null,
+      createdAt: new Date(`2026-04-10T09:${String(index % 60).padStart(2, "0")}:00.000Z`),
+      agentId: "agent-1",
+      agentName: "Builder",
+      adapterType: "codex_local",
+      logBytes: 0,
+      livenessState: "healthy",
+      livenessReason: null,
+      continuationAttempt: 0,
+      lastUsefulActionAt: null,
+      nextAction: null,
+      lastOutputAt: null,
+      lastOutputSeq: null,
+      lastOutputStream: null,
+      lastOutputBytes: 0,
+      processStartedAt: null,
+      issueId: "issue-1",
+    }));
+    const { db, limit } = createLiveRunsDbStub(rows);
+
+    const res = await requestApp(
+      await createApp(db),
+      (baseUrl) => request(baseUrl).get("/api/companies/company-1/live-runs"),
+    );
+
+    expect(res.status, JSON.stringify(res.body)).toBe(200);
+    expect(limit).toHaveBeenCalledWith(50);
+    expect(res.body).toHaveLength(50);
+    expect(mockHeartbeatService.buildRunOutputSilence).toHaveBeenCalledTimes(50);
+  });
 });