From 7b581eccc1d62a8d944c4c88ffe7ebfbfe54d2ab Mon Sep 17 00:00:00 2001
From: Vincent Koc <vincentkoc@ieee.org>
Date: Fri, 31 Jul 2026 00:50:07 +0800
Subject: [PATCH] test(openai): cover GPT-Live delegation output bounds

---
 .../realtime-quicksilver-bridge.test.ts       | 25 ++++++++
 .../realtime-quicksilver-delegation.test.ts   | 64 +++++++++++++++++++
 ...ealtime-quicksilver-gateway-bridge.test.ts | 24 +++++++
 3 files changed, 113 insertions(+)

diff --git a/extensions/openai/realtime-quicksilver-bridge.test.ts b/extensions/openai/realtime-quicksilver-bridge.test.ts
index 43e2bb83fcb5..91ceca298e94 100644
--- a/extensions/openai/realtime-quicksilver-bridge.test.ts
+++ b/extensions/openai/realtime-quicksilver-bridge.test.ts
@@ -370,6 +370,31 @@ describe("OpenAIQuicksilverVoiceBridge", () => {
     });
   });
 
+  it("bounds direct tool results before sideband sends", async () => {
+    const harness = createHarness();
+    await harness.bridge.connect();
+
+    harness.socket.serverEvent({
+      type: "delegation.created",
+      item: {
+        type: "delegation",
+        target: "client",
+        id: "delegation-large",
+        content: [{ type: "input_text", text: "summarize everything" }],
+      },
+    });
+    harness.bridge.submitToolResult("delegation-large", { text: "x".repeat(10_000) });
+
+    const appends = sentEvents(harness.socket).filter(
+      (event) => event.type === "delegation.context.append",
+    );
+    expect(appends.length).toBeGreaterThan(0);
+    expect(appends.length).toBeLessThanOrEqual(11);
+    expect(
+      appends.map((event) => (event.content as Array<{ text: string }>)[0]?.text ?? "").join(""),
+    ).toMatch(/^x+ \[truncated\]$/);
+  });
+
   it("normalizes assistant completion to the shared response lifecycle", async () => {
     const harness = createHarness();
     await harness.bridge.connect();
diff --git a/extensions/openai/realtime-quicksilver-delegation.test.ts b/extensions/openai/realtime-quicksilver-delegation.test.ts
index 38d56b74cb06..0f5aa192e598 100644
--- a/extensions/openai/realtime-quicksilver-delegation.test.ts
+++ b/extensions/openai/realtime-quicksilver-delegation.test.ts
@@ -1,5 +1,6 @@
 import { afterEach, describe, expect, it, vi } from "vitest";
 import {
+  boundOpenAIQuicksilverDelegationResult,
   chunkOpenAIQuicksilverAppendText,
   parseOpenAIQuicksilverEvent,
 } from "./realtime-quicksilver-wire.js";
@@ -125,6 +126,22 @@ describe("GPT-Live sideband protocol", () => {
     }
   });
 
+  it("bounds total speakable text before chunking", () => {
+    expect(boundOpenAIQuicksilverDelegationResult("  short result  ")).toBe("  short result  ");
+    const limited = boundOpenAIQuicksilverDelegationResult(
+      `${"a".repeat(1_783)}😀${"b".repeat(1_000)}`,
+    );
+    const chunks = chunkOpenAIQuicksilverAppendText(limited);
+
+    expect(limited).toMatch(/ \[truncated\]$/);
+    expect(limited.length).toBeLessThanOrEqual(1_800);
+    expect(limited).not.toContain("\uFFFD");
+    expect(chunks.length).toBeLessThanOrEqual(11);
+    for (const chunk of chunks) {
+      expect(Buffer.byteLength(chunk, "utf8")).toBeLessThanOrEqual(500);
+    }
+  });
+
   it("wraps delegated input and appends the raw speakable result", async () => {
     const runAgentConsult = vi.fn(async ({ prompt }: { prompt: string }) => ({
       text: `Result for ${prompt}`,
@@ -194,6 +211,53 @@ describe("GPT-Live sideband protocol", () => {
     }
   });
 
+  it("bounds browser delegation output before sideband sends", async () => {
+    const runAgentConsult = vi.fn(async () => ({ text: "x".repeat(10_000) }));
+    const { realtime, sockets } = createBroker({ runAgentConsult });
+    try {
+      const reservation = await realtime.broker.createBrowserSession(
+        { providerConfig: {}, model: "gpt-live-1", runAgentConsult },
+        { type: "api-key", token: "platform-key" },
+      );
+      if (reservation.transport !== "webrtc") {
+        throw new Error("Expected WebRTC reservation");
+      }
+      await realtime.handler(
+        createRequest({ token: reservation.clientSecret }),
+        createResponseHarness().res,
+      );
+      const socket = sockets[0];
+      if (!socket) {
+        throw new Error("Expected sideband socket");
+      }
+
+      emitSideband(socket, {
+        type: "delegation.created",
+        item: {
+          type: "delegation",
+          target: "client",
+          id: "delegation-large",
+          content: [{ type: "input_text", text: "summarize everything" }],
+        },
+      });
+
+      await vi.waitFor(() => {
+        const appends = parseSent(socket).filter(
+          (event) => event.type === "delegation.context.append",
+        );
+        expect(appends.length).toBeGreaterThan(0);
+        expect(appends.length).toBeLessThanOrEqual(11);
+        expect(
+          appends
+            .map((event) => (event.content as Array<{ text: string }>)[0]?.text ?? "")
+            .join(""),
+        ).toMatch(/^x+ \[truncated\]$/);
+      });
+    } finally {
+      await realtime.cleanup();
+    }
+  });
+
   it("adds the in-call transcript delta to each delegation and resets it", async () => {
     const runAgentConsult = vi.fn(async (_params: { prompt: string; signal?: AbortSignal }) => ({
       text: "Done",
diff --git a/extensions/openai/realtime-quicksilver-gateway-bridge.test.ts b/extensions/openai/realtime-quicksilver-gateway-bridge.test.ts
index eab9fd856777..c35b58dd6392 100644
--- a/extensions/openai/realtime-quicksilver-gateway-bridge.test.ts
+++ b/extensions/openai/realtime-quicksilver-gateway-bridge.test.ts
@@ -626,6 +626,30 @@ describe("GPT-Live gateway relay bridge", () => {
     }
   });
 
+  it("bounds gateway delegation output before sideband sends", async () => {
+    const runAgentConsult = vi.fn(async () => ({ text: "x".repeat(10_000) }));
+    const { bridge, socket, testBridge } = createDelegationBridge(runAgentConsult);
+    try {
+      await testBridge.runDelegation({
+        delegationId: "delegation-large",
+        prompt: "summarize everything",
+        runAgentConsult,
+        signal: new AbortController().signal,
+      });
+
+      const appends = parseSent(socket).filter(
+        (event) => event.type === "delegation.context.append",
+      );
+      expect(appends.length).toBeGreaterThan(0);
+      expect(appends.length).toBeLessThanOrEqual(11);
+      expect(
+        appends.map((event) => (event.content as Array<{ text: string }>)[0]?.text ?? "").join(""),
+      ).toMatch(/^x+ \[truncated\]$/);
+    } finally {
+      bridge.close();
+    }
+  });
+
   it("keeps only the latest delegation when the superseded consult rejects on abort", async () => {
     const resolvers: Array<(value: { text: string }) => void> = [];
     const signals: AbortSignal[] = [];