Fix custom agents visibility by updating CLI to 0.0.399

nodejs/package.json

@@ -40,7 +40,7 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@github/copilot": "^0.0.394",
+    "@github/copilot": "^0.0.399",
     "vscode-jsonrpc": "^8.2.1",
     "zod": "^4.3.5"
   },

nodejs/test/e2e/mcp-and-agents.test.ts

@@ -217,6 +217,59 @@ describe("MCP Servers and Custom Agents", async () => {
             expect(session.sessionId).toBeDefined();
             await session.destroy();
         });
+
+        it("should surface custom agents to the assistant for listing", async () => {
+            const customAgents: CustomAgentConfig[] = [
+                {
+                    name: "sdk-test-agent",
+                    displayName: "SDK Test Agent",
+                    description: "A custom test agent configured via SDK",
+                    prompt: "You are a helpful test agent.",
+                    infer: true,
+                },
+            ];
+
+            const session = await client.createSession({
+                customAgents,
+            });
+
+            expect(session.sessionId).toBeDefined();
+
+            // Ask the assistant to list custom agents
+            // The assistant should be able to see and mention the custom agent
+            const message = await session.sendAndWait({
+                prompt: "What custom agents are available? List them with their names and descriptions.",
+            });
+
+            // The response should mention the custom agent we defined
+            expect(message?.data.content).toBeDefined();
+            const content = message.data.content;
+
+            // Check that the custom agent is actually surfaced in the response
+            // We look for the agent name along with its description to ensure
+            // the agent information is being properly displayed, not just mentioned generically
+            const contentLowercase = content.toLowerCase();
+            const hasAgentName =
+                contentLowercase.includes("sdk-test-agent") ||
+                contentLowercase.includes("sdk test agent");
+            const hasAgentDescription =
+                contentLowercase.includes("custom test agent") ||
+                contentLowercase.includes("configured via sdk");
+
+            // At minimum, the agent name should be present
+            expect(hasAgentName).toBe(true);
+
+            // Ideally, the description should also be present, indicating full surfacing
+            // Note: This may fail if the model doesn't include full details, but
+            // the agent name being present confirms basic visibility
+            if (!hasAgentDescription) {
+                console.warn(
+                    "Custom agent name found but description not included in response. This may indicate partial surfacing."
+                );
+            }
+
+            await session.destroy();
+        });
     });
 
     describe("Combined Configuration", () => {

test/harness/package.json

@@ -11,7 +11,7 @@
     "test": "vitest run"
   },
   "devDependencies": {
-    "@github/copilot": "^0.0.394",
+    "@github/copilot": "^0.0.399",
     "@types/node": "^25.0.3",
     "openai": "^6.15.0",
     "tsx": "^4.21.0",