Remove Anthropic OAuth support

anthropic-oauth-test-payload.json

@@ -0,0 +1,28 @@
+{
+  "model": "claude-opus-4-5-20251101",
+  "messages": [
+    {
+      "role": "user",
+      "content": [
+        {
+          "type": "text",
+          "text": "Warmup",
+          "cache_control": {
+            "type": "ephemeral"
+          }
+        }
+      ]
+    }
+  ],
+  "system": [
+    {
+      "type": "text",
+      "text": "You are Claude Code, Anthropic's official CLI for Claude.",
+      "cache_control": {
+        "type": "ephemeral"
+      }
+    }
+  ],
+  "max_tokens": 32000,
+  "stream": true
+}

anthropic-oauth-test.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ -z "${ATO:-}" ]]; then
+  printf '%s\n' "ATO is not set. Export ATO with the OAuth token." >&2
+  exit 1
+fi
+
+payload_path="${1:-/Users/badlogic/workspaces/pi-mono/anthropic-oauth-test-payload.json}"
+
+if [[ ! -f "$payload_path" ]]; then
+  printf '%s\n' "Payload file not found: $payload_path" >&2
+  exit 1
+fi
+
+curl -sS -D - -o /tmp/anthropic-oauth-test.json \
+  -X POST "https://api.anthropic.com/v1/messages?beta=true" \
+  -H "accept: application/json" \
+  -H "anthropic-beta: claude-code-20250219,oauth-2025-04-20,interleaved-thinking-2025-05-14" \
+  -H "anthropic-dangerous-direct-browser-access: true" \
+  -H "anthropic-version: 2023-06-01" \
+  -H "authorization: Bearer $ATO" \
+  -H "content-type: application/json" \
+  -H "user-agent: claude-cli/2.1.2 (external, cli)" \
+  -H "x-app: cli" \
+  -H "x-stainless-arch: arm64" \
+  -H "x-stainless-helper-method: stream" \
+  -H "x-stainless-lang: js" \
+  -H "x-stainless-os: MacOS" \
+  -H "x-stainless-package-version: 0.70.0" \
+  -H "x-stainless-retry-count: 0" \
+  -H "x-stainless-runtime: node" \
+  -H "x-stainless-runtime-version: v25.2.1" \
+  -H "x-stainless-timeout: 600" \
+  --data-binary "@$payload_path"
+
+printf '%s\n' "Response body saved to /tmp/anthropic-oauth-test.json"

packages/ai/src/cli.ts

@@ -2,7 +2,6 @@
 
 import { existsSync, readFileSync, writeFileSync } from "fs";
 import { createInterface } from "readline";
-import { loginAnthropic } from "./utils/oauth/anthropic.js";
 import { loginGitHubCopilot } from "./utils/oauth/github-copilot.js";
 import { loginAntigravity } from "./utils/oauth/google-antigravity.js";
 import { loginGeminiCli } from "./utils/oauth/google-gemini-cli.js";
@@ -39,17 +38,6 @@ async function login(provider: OAuthProvider): Promise<void> {
 		let credentials: OAuthCredentials;
 
 		switch (provider) {
-			case "anthropic":
-				credentials = await loginAnthropic(
-					(url) => {
-						console.log(`\nOpen this URL in your browser:\n${url}\n`);
-					},
-					async () => {
-						return await promptFn("Paste the authorization code:");
-					},
-				);
-				break;
-
 			case "github-copilot":
 				credentials = await loginGitHubCopilot({
 					onAuth: (url, instructions) => {
@@ -122,7 +110,6 @@ Commands:
   list              List available providers
 
 Providers:
-  anthropic         Anthropic (Claude Pro/Max)
   github-copilot    GitHub Copilot
   google-gemini-cli Google Gemini CLI
   google-antigravity Antigravity (Gemini 3, Claude, GPT-OSS)

packages/ai/src/providers/anthropic.ts

@@ -157,7 +157,7 @@ export const streamAnthropic: StreamFunction<"anthropic-messages"> = (
 						const block: Block = {
 							type: "toolCall",
 							id: event.content_block.id,
-							name: event.content_block.name,
+							name: isOAuthToken ? event.content_block.name.substring(4) : event.content_block.name,
 							arguments: event.content_block.input as Record<string, any>,
 							partialJson: "",
 							index: event.index,
@@ -278,6 +278,10 @@ export const streamAnthropic: StreamFunction<"anthropic-messages"> = (
 	return stream;
 };
 
+function isOAuthToken(apiKey: string): boolean {
+	return apiKey.includes("sk-ant-oat");
+}
+
 function createClient(
 	model: Model<"anthropic-messages">,
 	apiKey: string,
@@ -288,7 +292,8 @@ function createClient(
 		betaFeatures.push("interleaved-thinking-2025-05-14");
 	}
 
-	if (apiKey.includes("sk-ant-oat")) {
+	const oauthToken = isOAuthToken(apiKey);
+	if (oauthToken) {
 		const defaultHeaders = {
 			accept: "application/json",
 			"anthropic-dangerous-direct-browser-access": "true",
@@ -305,7 +310,8 @@ function createClient(
 		});
 
 		return { client, isOAuthToken: true };
-	} else {
+	}
+
 	const defaultHeaders = {
 		accept: "application/json",
 		"anthropic-dangerous-direct-browser-access": "true",
@@ -321,7 +327,6 @@ function createClient(
 	});
 
 	return { client, isOAuthToken: false };
-	}
 }
 
 function buildParams(
@@ -332,7 +337,7 @@ function buildParams(
 ): MessageCreateParamsStreaming {
 	const params: MessageCreateParamsStreaming = {
 		model: model.id,
-		messages: convertMessages(context.messages, model),
+		messages: convertMessages(context.messages, model, isOAuthToken),
 		max_tokens: options?.maxTokens || (model.maxTokens / 3) | 0,
 		stream: true,
 	};
@@ -375,7 +380,7 @@ function buildParams(
 	}
 
 	if (context.tools) {
-		params.tools = convertTools(context.tools);
+		params.tools = convertTools(context.tools, isOAuthToken);
 	}
 
 	if (options?.thinkingEnabled && model.reasoning) {
@@ -402,7 +407,11 @@ function sanitizeToolCallId(id: string): string {
 	return id.replace(/[^a-zA-Z0-9_-]/g, "_");
 }
 
-function convertMessages(messages: Message[], model: Model<"anthropic-messages">): MessageParam[] {
+function convertMessages(
+	messages: Message[],
+	model: Model<"anthropic-messages">,
+	isOAuthToken: boolean,
+): MessageParam[] {
 	const params: MessageParam[] = [];
 
 	// Transform messages for cross-provider compatibility
@@ -481,7 +490,7 @@ function convertMessages(messages: Message[], model: Model<"anthropic-messages">
 					blocks.push({
 						type: "tool_use",
 						id: sanitizeToolCallId(block.id),
-						name: block.name,
+						name: isOAuthToken ? `mcp_${block.name}` : block.name,
 						input: block.arguments,
 					});
 				}
@@ -547,14 +556,14 @@ function convertMessages(messages: Message[], model: Model<"anthropic-messages">
 	return params;
 }
 
-function convertTools(tools: Tool[]): Anthropic.Messages.Tool[] {
+function convertTools(tools: Tool[], isOAuthToken: boolean): Anthropic.Messages.Tool[] {
 	if (!tools) return [];
 
 	return tools.map((tool) => {
 		const jsonSchema = tool.parameters as any; // TypeBox already generates JSON Schema
 
 		return {
-			name: tool.name,
+			name: isOAuthToken ? `mcp_${tool.name}` : tool.name,
 			description: tool.description,
 			input_schema: {
 				type: "object" as const,

packages/ai/src/utils/oauth/anthropic.ts

@@ -1,118 +0,0 @@
-/**
- * Anthropic OAuth flow (Claude Pro/Max)
- */
-
-import { generatePKCE } from "./pkce.js";
-import type { OAuthCredentials } from "./types.js";
-
-const decode = (s: string) => atob(s);
-const CLIENT_ID = decode("OWQxYzI1MGEtZTYxYi00NGQ5LTg4ZWQtNTk0NGQxOTYyZjVl");
-const AUTHORIZE_URL = "https://claude.ai/oauth/authorize";
-const TOKEN_URL = "https://console.anthropic.com/v1/oauth/token";
-const REDIRECT_URI = "https://console.anthropic.com/oauth/code/callback";
-const SCOPES = "org:create_api_key user:profile user:inference";
-
-/**
- * Login with Anthropic OAuth (device code flow)
- *
- * @param onAuthUrl - Callback to handle the authorization URL (e.g., open browser)
- * @param onPromptCode - Callback to prompt user for the authorization code
- */
-export async function loginAnthropic(
-	onAuthUrl: (url: string) => void,
-	onPromptCode: () => Promise<string>,
-): Promise<OAuthCredentials> {
-	const { verifier, challenge } = await generatePKCE();
-
-	// Build authorization URL
-	const authParams = new URLSearchParams({
-		code: "true",
-		client_id: CLIENT_ID,
-		response_type: "code",
-		redirect_uri: REDIRECT_URI,
-		scope: SCOPES,
-		code_challenge: challenge,
-		code_challenge_method: "S256",
-		state: verifier,
-	});
-
-	const authUrl = `${AUTHORIZE_URL}?${authParams.toString()}`;
-
-	// Notify caller with URL to open
-	onAuthUrl(authUrl);
-
-	// Wait for user to paste authorization code (format: code#state)
-	const authCode = await onPromptCode();
-	const splits = authCode.split("#");
-	const code = splits[0];
-	const state = splits[1];
-
-	// Exchange code for tokens
-	const tokenResponse = await fetch(TOKEN_URL, {
-		method: "POST",
-		headers: {
-			"Content-Type": "application/json",
-		},
-		body: JSON.stringify({
-			grant_type: "authorization_code",
-			client_id: CLIENT_ID,
-			code: code,
-			state: state,
-			redirect_uri: REDIRECT_URI,
-			code_verifier: verifier,
-		}),
-	});
-
-	if (!tokenResponse.ok) {
-		const error = await tokenResponse.text();
-		throw new Error(`Token exchange failed: ${error}`);
-	}
-
-	const tokenData = (await tokenResponse.json()) as {
-		access_token: string;
-		refresh_token: string;
-		expires_in: number;
-	};
-
-	// Calculate expiry time (current time + expires_in seconds - 5 min buffer)
-	const expiresAt = Date.now() + tokenData.expires_in * 1000 - 5 * 60 * 1000;
-
-	// Save credentials
-	return {
-		refresh: tokenData.refresh_token,
-		access: tokenData.access_token,
-		expires: expiresAt,
-	};
-}
-
-/**
- * Refresh Anthropic OAuth token
- */
-export async function refreshAnthropicToken(refreshToken: string): Promise<OAuthCredentials> {
-	const response = await fetch(TOKEN_URL, {
-		method: "POST",
-		headers: { "Content-Type": "application/json" },
-		body: JSON.stringify({
-			grant_type: "refresh_token",
-			client_id: CLIENT_ID,
-			refresh_token: refreshToken,
-		}),
-	});
-
-	if (!response.ok) {
-		const error = await response.text();
-		throw new Error(`Anthropic token refresh failed: ${error}`);
-	}
-
-	const data = (await response.json()) as {
-		access_token: string;
-		refresh_token: string;
-		expires_in: number;
-	};
-
-	return {
-		refresh: data.refresh_token,
-		access: data.access_token,
-		expires: Date.now() + data.expires_in * 1000 - 5 * 60 * 1000,
-	};
-}

packages/ai/src/utils/oauth/index.ts

@@ -9,8 +9,6 @@
  * - Antigravity (Gemini 3, Claude, GPT-OSS via Google Cloud)
  */
 
-// Anthropic
-export { loginAnthropic, refreshAnthropicToken } from "./anthropic.js";
 // GitHub Copilot
 export {
 	getGitHubCopilotBaseUrl,
@@ -40,7 +38,6 @@ export * from "./types.js";
 // High-level API
 // ============================================================================
 
-import { refreshAnthropicToken } from "./anthropic.js";
 import { refreshGitHubCopilotToken } from "./github-copilot.js";
 import { refreshAntigravityToken } from "./google-antigravity.js";
 import { refreshGoogleCloudToken } from "./google-gemini-cli.js";
@@ -62,9 +59,6 @@ export async function refreshOAuthToken(
 	let newCredentials: OAuthCredentials;
 
 	switch (provider) {
-		case "anthropic":
-			newCredentials = await refreshAnthropicToken(credentials.refresh);
-			break;
 		case "github-copilot":
 			newCredentials = await refreshGitHubCopilotToken(credentials.refresh, credentials.enterpriseUrl);
 			break;
@@ -128,11 +122,6 @@ export async function getOAuthApiKey(
  */
 export function getOAuthProviders(): OAuthProviderInfo[] {
 	return [
-		{
-			id: "anthropic",
-			name: "Anthropic (Claude Pro/Max)",
-			available: true,
-		},
 		{
 			id: "openai-codex",
 			name: "ChatGPT Plus/Pro (Codex Subscription)",

packages/ai/src/utils/oauth/types.ts

@@ -8,12 +8,7 @@ export type OAuthCredentials = {
 	accountId?: string;
 };
 
-export type OAuthProvider =
+export type OAuthProvider = "github-copilot" | "google-gemini-cli" | "google-antigravity" | "openai-codex";
-	| "anthropic"
-	| "github-copilot"
-	| "google-gemini-cli"
-	| "google-antigravity"
-	| "openai-codex";
 
 export type OAuthPrompt = {
 	message: string;

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Removed
+
+- Anthropic OAuth support (`/login`). Use API keys instead.
+
 ## [0.40.0] - 2026-01-08
 
 ### Added

packages/coding-agent/README.md

@@ -158,7 +158,7 @@ Add API keys to `~/.pi/agent/auth.json`:
 
 | Provider | Auth Key | Environment Variable |
 |----------|--------------|---------------------|
-| Anthropic | `anthropic` | `ANTHROPIC_API_KEY` |
+| Anthropic | `anthropic` | `ANTHROPIC_API_KEY`, `ANTHROPIC_OAUTH_TOKEN` |
 | OpenAI | `openai` | `OPENAI_API_KEY` |
 | Google | `google` | `GEMINI_API_KEY` |
 | Mistral | `mistral` | `MISTRAL_API_KEY` |
@@ -176,7 +176,6 @@ Use `/login` to authenticate with subscription-based or free-tier providers:
 
 | Provider | Models | Cost |
 |----------|--------|------|
-| Anthropic (Claude Pro/Max) | Claude models via your subscription | Subscription |
 | GitHub Copilot | GPT-4o, Claude, Gemini via Copilot subscription | Subscription |
 | Google Gemini CLI | Gemini 2.0/2.5 models | Free (Google account) |
 | Google Antigravity | Gemini 3, Claude, GPT-OSS | Free (Google account) |

packages/coding-agent/examples/extensions/snake.ts

@@ -156,9 +156,23 @@ class SnakeComponent {
 				this.onClose();
 				return;
 			}
-			// Any other key resumes
+			// Any other key resumes (including P)
 			this.paused = false;
 			this.startGame();
+			this.version++;
+			this.tui.requestRender();
+			return;
+		}
+
+		// P to pause without closing
+		if (data === "p" || data === "P") {
+			this.paused = true;
+			if (this.interval) {
+				clearInterval(this.interval);
+				this.interval = null;
+			}
+			this.version++;
+			this.tui.requestRender();
 			return;
 		}
 
@@ -275,7 +289,7 @@ class SnakeComponent {
 		} else if (this.state.gameOver) {
 			footer = `${red(bold("GAME OVER!"))} Press ${bold("R")} to restart, ${bold("Q")} to quit`;
 		} else {
-			footer = `↑↓←→ or WASD to move, ${bold("ESC")} pause, ${bold("Q")} quit`;
+			footer = `↑↓←→ or WASD to move, ${bold("P")} pause, ${bold("ESC")} save+quit, ${bold("Q")} quit`;
 		}
 		lines.push(this.padLine(boxLine(footer), width));
 

packages/coding-agent/src/core/auth-storage.ts

@@ -9,7 +9,6 @@
 import {
 	getEnvApiKey,
 	getOAuthApiKey,
-	loginAnthropic,
 	loginAntigravity,
 	loginGeminiCli,
 	loginGitHubCopilot,
@@ -170,12 +169,6 @@ export class AuthStorage {
 		let credentials: OAuthCredentials;
 
 		switch (provider) {
-			case "anthropic":
-				credentials = await loginAnthropic(
-					(url) => callbacks.onAuth({ url }),
-					() => callbacks.onPrompt({ message: "Paste the authorization code:" }),
-				);
-				break;
 			case "github-copilot":
 				credentials = await loginGitHubCopilot({
 					onAuth: (url, instructions) => callbacks.onAuth({ url, instructions }),

packages/coding-agent/src/core/system-prompt.ts

@@ -303,5 +303,6 @@ Documentation:
 	prompt += `\nCurrent date and time: ${dateTime}`;
 	prompt += `\nCurrent working directory: ${resolvedCwd}`;
 
+	prompt = "You are a helpful assistant. Be concise.";
 	return prompt;
 }