chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/ai/test/oauth-auth.test.ts

@@ -3,6 +3,7 @@ import { InMemoryCredentialStore } from "../src/auth/credential-store.ts";
 import { anthropicOAuth } from "../src/auth/oauth/anthropic.ts";
 import { githubCopilotOAuth } from "../src/auth/oauth/github-copilot.ts";
 import { kimiCodingOAuth } from "../src/auth/oauth/kimi-coding.ts";
+import { openaiChatGPTOAuth } from "../src/auth/oauth/openai-chatgpt.ts";
 import { openaiCodexOAuth } from "../src/auth/oauth/openai-codex.ts";
 import { openRouterOAuth } from "../src/auth/oauth/openrouter.ts";
 import { xaiOAuth } from "../src/auth/oauth/xai.ts";
@@ -10,6 +11,7 @@ import { createModels } from "../src/models.ts";
 import * as extensionOAuthCompatibility from "../src/oauth.ts";
 import { anthropicProvider } from "../src/providers/anthropic.ts";
 import { githubCopilotProvider } from "../src/providers/github-copilot.ts";
+import { openaiProvider } from "../src/providers/openai.ts";
 
 const neverAbortedSignal = new AbortController().signal;
 
@@ -28,7 +30,14 @@ describe.sequential("OAuthAuth adapters", () => {
 	});
 
 	it("identifies only subscription-backed OAuth flows as subscriptions", () => {
-		for (const oauth of [anthropicOAuth, openaiCodexOAuth, githubCopilotOAuth, kimiCodingOAuth, xaiOAuth]) {
+		for (const oauth of [
+			anthropicOAuth,
+			openaiChatGPTOAuth,
+			openaiCodexOAuth,
+			githubCopilotOAuth,
+			kimiCodingOAuth,
+			xaiOAuth,
+		]) {
 			expect(oauth.isSubscription).toBe(true);
 		}
 		expect(openRouterOAuth.isSubscription).not.toBe(true);
@@ -39,6 +48,16 @@ describe.sequential("OAuthAuth adapters", () => {
 		expect(auth).toEqual({ apiKey: "token" });
 	});
 
+	it("OpenAI exposes ChatGPT OAuth alongside API-key auth", () => {
+		const provider = openaiProvider();
+		expect(provider.auth.apiKey).toBeDefined();
+		expect(provider.auth.oauth).toMatchObject({
+			name: "OpenAI (ChatGPT subscription)",
+			isSubscription: true,
+			loginLabel: "Sign in with ChatGPT",
+		});
+	});
+
 	it("openai-codex toAuth derives the api key from the access token", async () => {
 		const auth = await openaiCodexOAuth.toAuth({ type: "oauth", access: "token", refresh: "r", expires: 0 });
 		expect(auth).toEqual({ apiKey: "token" });