Expose loadCliConfig in Node SDK

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: EvanBoyle

nodejs/src/client.ts

@@ -616,6 +616,7 @@ export class CopilotClient {
                 customAgents: config.customAgents,
                 agent: config.agent,
                 configDir: config.configDir,
+                loadCliConfig: config.loadCliConfig,
                 skillDirectories: config.skillDirectories,
                 disabledSkills: config.disabledSkills,
                 infiniteSessions: config.infiniteSessions,
@@ -722,6 +723,7 @@ export class CopilotClient {
                 envValueMode: "direct",
                 customAgents: config.customAgents,
                 agent: config.agent,
+                loadCliConfig: config.loadCliConfig,
                 skillDirectories: config.skillDirectories,
                 disabledSkills: config.disabledSkills,
                 infiniteSessions: config.infiniteSessions,

nodejs/src/types.ts

@@ -736,6 +736,15 @@ export interface SessionConfig {
      */
     configDir?: string;
 
+    /**
+     * When true, the runtime loads CLI-style extensibility from the current environment.
+     * This includes merged MCP config, default GitHub MCP behavior, skills, custom agents,
+     * installed plugins, and other config-backed session options.
+     * Explicit per-request settings are merged on top of discovered config.
+     * @default false
+     */
+    loadCliConfig?: boolean;
+
     /**
      * Tools exposed to the CLI server
      */
@@ -865,6 +874,7 @@ export type ResumeSessionConfig = Pick<
     | "hooks"
     | "workingDirectory"
     | "configDir"
+    | "loadCliConfig"
     | "mcpServers"
     | "customAgents"
     | "agent"

nodejs/test/client.test.ts

@@ -97,6 +97,46 @@ describe("CopilotClient", () => {
         spy.mockRestore();
     });
 
+    it("forwards loadCliConfig in session.create request", async () => {
+        const client = new CopilotClient();
+        await client.start();
+        onTestFinished(() => client.forceStop());
+
+        const spy = vi.spyOn((client as any).connection!, "sendRequest");
+        await client.createSession({ loadCliConfig: true, onPermissionRequest: approveAll });
+
+        expect(spy).toHaveBeenCalledWith(
+            "session.create",
+            expect.objectContaining({ loadCliConfig: true })
+        );
+        spy.mockRestore();
+    });
+
+    it("forwards loadCliConfig in session.resume request", async () => {
+        const client = new CopilotClient();
+        await client.start();
+        onTestFinished(() => client.forceStop());
+
+        const session = await client.createSession({ onPermissionRequest: approveAll });
+        const spy = vi
+            .spyOn((client as any).connection!, "sendRequest")
+            .mockImplementation(async (method: string, params: any) => {
+                if (method === "session.resume") return { sessionId: params.sessionId };
+                throw new Error(`Unexpected method: ${method}`);
+            });
+
+        await client.resumeSession(session.sessionId, {
+            loadCliConfig: true,
+            onPermissionRequest: approveAll,
+        });
+
+        expect(spy).toHaveBeenCalledWith(
+            "session.resume",
+            expect.objectContaining({ sessionId: session.sessionId, loadCliConfig: true })
+        );
+        spy.mockRestore();
+    });
+
     it("sends session.model.switchTo RPC with correct params", async () => {
         const client = new CopilotClient();
         await client.start();