fix: send completion elicitation event for device authentication

src/CodexAcpClient.ts

@@ -86,6 +86,7 @@ export type UrlElicitationRequest = Omit<CreateUrlElicitationRequest, "mode" | "
 
 export interface UrlElicitationRequester {
     elicitUrl(request: UrlElicitationRequest): Promise<acp.CreateElicitationResponse>;
+    completeElicitation(): Promise<void>;
 }
 
 /**
@@ -200,16 +201,34 @@ export class CodexAcpClient {
         if (loginResponse.type !== "chatgptDeviceCode") {
             return false;
         }
-        const elicitationResponse = await urlElicitationRequester.elicitUrl({
+        const elicitationResponsePromise = Promise.resolve(urlElicitationRequester.elicitUrl({
             url: loginResponse.verificationUrl,
             message: `Sign in to ChatGPT and enter this code: ${loginResponse.userCode}`,
             elicitationId: loginResponse.loginId,
-        });
-        if (!acp.CreateElicitationResponse.isAccept(elicitationResponse)) {
+        }));
+        const first = await Promise.race([
+            loginCompletedPromise.then(result => ({
+                type: "loginCompleted" as const,
+                result,
+            })),
+            elicitationResponsePromise.then(response => ({
+                type: "elicitationResponse" as const,
+                response,
+            })),
+        ]);
+
+        if (first.type === "loginCompleted") {
+            await urlElicitationRequester.completeElicitation();
+            return first.result.success;
+        }
+
+        if (!acp.CreateElicitationResponse.isAccept(first.response)) {
             await this.codexClient.accountLoginCancel({loginId: loginResponse.loginId});
             return false;
         }
+
         const result = await loginCompletedPromise;
+        await urlElicitationRequester.completeElicitation();
         return result.success;
     }
 

src/CodexAcpServer.ts

@@ -858,12 +858,24 @@ export class CodexAcpServer {
         if (requestId == null || !clientSupportsUrlElicitation(this.clientCapabilities)) {
             return undefined;
         }
+        let elicitationId: string | null = null;
         return {
-            elicitUrl: (request) => this.connection.request(acp.methods.client.elicitation.create, {
-                mode: "url",
-                requestId,
-                ...request,
-            }),
+            elicitUrl: (request) => {
+                elicitationId = request.elicitationId;
+                return this.connection.request(acp.methods.client.elicitation.create, {
+                    mode: "url",
+                    requestId,
+                    ...request,
+                });
+            },
+            completeElicitation: async () => {
+                if (elicitationId === null) {
+                    return;
+                }
+                await this.connection.notify(acp.methods.client.elicitation.complete, {
+                    elicitationId,
+                });
+            },
         };
     }
 

src/__tests__/CodexACPAgent/CodexAcpClient.test.ts

@@ -254,6 +254,11 @@ describe('ACP server test', { timeout: 40_000 }, () => {
             url: "https://example.com/device",
             message: expect.stringContaining("ABCD-1234"),
         });
+        const elicitationComplete = deviceFixture.getAcpConnectionEvents([])
+            .find(event => event.method === "completeElicitation");
+        expect(elicitationComplete?.args[0]).toEqual({
+            elicitationId: "login-1",
+        });
     });
 
     it('should cancel ChatGPT device code login when URL elicitation is declined', async () => {
@@ -270,6 +275,30 @@ describe('ACP server test', { timeout: 40_000 }, () => {
         await expect(codexAcpAgent.authenticate({ methodId: "chat-gpt-device-code" }, 42))
             .rejects.toThrow();
         expect(cancelSpy).toHaveBeenCalledWith({ loginId: "login-1" });
+        expect(deviceFixture.getAcpConnectionEvents([])
+            .some(event => event.method === "completeElicitation"))
+            .toBe(false);
+    });
+
+    it('should complete URL elicitation when login finishes before the elicitation response', async () => {
+        const { deviceFixture, completeLogin, loginCompletedSubscribed } = createDeviceCodeFixture();
+        const codexAcpAgent = deviceFixture.getCodexAcpAgent();
+        await codexAcpAgent.initialize({
+            protocolVersion: 1,
+            clientCapabilities: { elicitation: { url: {} } },
+        });
+        deviceFixture.setElicitationResponse(new Promise(() => {}));
+
+        const authPromise = codexAcpAgent.authenticate({ methodId: "chat-gpt-device-code" }, 42);
+        await vi.waitFor(() => expect(loginCompletedSubscribed()).toBe(true));
+        completeLogin(true);
+        await expect(authPromise).resolves.toEqual({});
+
+        const elicitationComplete = deviceFixture.getAcpConnectionEvents([])
+            .find(event => event.method === "completeElicitation");
+        expect(elicitationComplete?.args[0]).toEqual({
+            elicitationId: "login-1",
+        });
     });
 
     it('should reject ChatGPT device code auth when the client lacks URL elicitation', async () => {