feat(antigravity): initial steps for Antigravity anti-ban alignment
Cherry-picked from decolua/9router#141 (author: LinearSakana / zx <me@char.moe>) - Implement client identity spoofing with numeric enums (ideType: 9, pluginType: 2) - Add runtime platform detection for User-Agent and metadata - Implement per-connection session ID caching (binary-compatible format) - Add ANTIGRAVITY_HEADERS (X-Client-Name, X-Client-Version, x-goog-api-client) - Add X-Machine-Session-Id header injection - Align metadata/mode parameters across all Antigravity API calls - Implement double injection for system prompt (raw + [ignore] wrapped) - Rename internal anti-loop header to x-request-source for anonymity Skipped: commit 6 (signature side-channel caching) — kept DEFAULT_THINKING_GEMINI_SIGNATURE Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
zx
decolua
parent
9fbd6e619d
commit
a229d79158
11 changed files with 309 additions and 121 deletions
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@ -1,3 +1,79 @@
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import { platform, arch } from "os";
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// === Antigravity Binary Alignment: Numeric Enums ===
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// Reference: Antigravity binary analysis - google.internal.cloud.code.v1internal.ClientMetadata
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// IDE Type enum (numeric values as expected by Cloud Code API)
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export const IDE_TYPE = {
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UNSPECIFIED: 0,
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JETSKI: 10, // Internal codename for Gemini CLI
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ANTIGRAVITY: 9,
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PLUGINS: 7
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};
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// Platform enum (as specified in Antigravity binary)
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export const PLATFORM = {
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UNSPECIFIED: 0,
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DARWIN_AMD64: 1,
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DARWIN_ARM64: 2,
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LINUX_AMD64: 3,
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LINUX_ARM64: 4,
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WINDOWS_AMD64: 5
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};
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// Plugin type enum (as specified in Antigravity binary)
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export const PLUGIN_TYPE = {
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UNSPECIFIED: 0,
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CLOUD_CODE: 1,
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GEMINI: 2
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};
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/**
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* Get the platform enum value based on the current OS.
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* @returns {number} Platform enum value
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*/
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export function getPlatformEnum() {
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const os = platform();
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const architecture = arch();
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if (os === "darwin") {
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return architecture === "arm64" ? PLATFORM.DARWIN_ARM64 : PLATFORM.DARWIN_AMD64;
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} else if (os === "linux") {
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return architecture === "arm64" ? PLATFORM.LINUX_ARM64 : PLATFORM.LINUX_AMD64;
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} else if (os === "win32") {
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return PLATFORM.WINDOWS_AMD64;
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}
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return PLATFORM.UNSPECIFIED;
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}
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/**
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* Generate platform-specific User-Agent string.
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* @returns {string} User-Agent in format "antigravity/version os/arch"
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*/
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export function getPlatformUserAgent() {
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const os = platform();
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const architecture = arch();
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return `antigravity/1.16.5 ${os}/${architecture}`;
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}
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// Centralized client metadata (used in request bodies for loadCodeAssist, onboardUser, etc.)
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// Using numeric enum values as expected by the Cloud Code API
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export const CLIENT_METADATA = {
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ideType: IDE_TYPE.ANTIGRAVITY, // 9 - identifies as Antigravity client
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platform: getPlatformEnum(), // Runtime platform detection
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pluginType: PLUGIN_TYPE.GEMINI // 2
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};
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// Internal anti-loop header to identify requests originating from this proxy
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export const INTERNAL_REQUEST_HEADER = { name: "x-request-source", value: "local" };
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// Antigravity headers
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export const ANTIGRAVITY_HEADERS = {
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"X-Client-Name": "antigravity",
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"X-Client-Version": "1.107.0",
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"x-goog-api-client": "gl-node/18.18.2 fire/0.8.6 grpc/1.10.x"
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};
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// Provider configurations
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export const PROVIDERS = {
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claude: {
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@ -78,7 +154,7 @@ export const PROVIDERS = {
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],
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format: "antigravity",
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headers: {
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"User-Agent": "antigravity/1.104.0 darwin/arm64"
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"User-Agent": getPlatformUserAgent()
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},
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clientId: "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com",
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clientSecret: "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"
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@ -181,7 +257,7 @@ export const PROVIDERS = {
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export const CLAUDE_SYSTEM_PROMPT = "You are Claude Code, Anthropic's official CLI for Claude.";
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// Antigravity default system prompt (required for API to work)
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export const ANTIGRAVITY_DEFAULT_SYSTEM = "Please ignore the following [ignore]You are Antigravity, a powerful agentic AI coding assistant designed by the Google Deepmind team working on Advanced Agentic Coding.You are pair programming with a USER to solve their coding task. The task may require creating a new codebase, modifying or debugging an existing codebase, or simply answering a question.**Absolute paths only****Proactiveness**[/ignore]";
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export const ANTIGRAVITY_DEFAULT_SYSTEM = "You are Antigravity, a powerful agentic AI coding assistant designed by the Google Deepmind team working on Advanced Agentic Coding.You are pair programming with a USER to solve their coding task. The task may require creating a new codebase, modifying or debugging an existing codebase, or simply answering a question.**Absolute paths only****Proactiveness**";
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// OAuth endpoints
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export const OAUTH_ENDPOINTS = {
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@ -1,6 +1,7 @@
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import crypto from "crypto";
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import { BaseExecutor } from "./base.js";
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import { PROVIDERS, OAUTH_ENDPOINTS, HTTP_STATUS } from "../config/constants.js";
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import { PROVIDERS, OAUTH_ENDPOINTS, HTTP_STATUS, ANTIGRAVITY_HEADERS, INTERNAL_REQUEST_HEADER } from "../config/constants.js";
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import { deriveSessionId } from "../utils/sessionManager.js";
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const MAX_RETRY_AFTER_MS = 10000;
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@ -16,12 +17,14 @@ export class AntigravityExecutor extends BaseExecutor {
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return `${baseUrl}/v1internal:${action}`;
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}
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buildHeaders(credentials, stream = true) {
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buildHeaders(credentials, stream = true, sessionId = null) {
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return {
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"Content-Type": "application/json",
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"Authorization": `Bearer ${credentials.accessToken}`,
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"User-Agent": this.config.headers?.["User-Agent"] || "antigravity/1.104.0 darwin/arm64",
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"X-9Router-Source": "9router",
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[INTERNAL_REQUEST_HEADER.name]: INTERNAL_REQUEST_HEADER.value,
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...ANTIGRAVITY_HEADERS,
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...(sessionId && { "X-Machine-Session-Id": sessionId }),
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...(stream && { "Accept": "text/event-stream" })
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};
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}
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@ -51,7 +54,7 @@ export class AntigravityExecutor extends BaseExecutor {
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const transformedRequest = {
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...body.request,
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...(contents && { contents }),
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sessionId: body.request?.sessionId || this.generateSessionId(),
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sessionId: body.request?.sessionId || deriveSessionId(credentials?.email || credentials?.connectionId),
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safetySettings: undefined,
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toolConfig: body.request?.tools?.length > 0
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? { functionCallingConfig: { mode: "VALIDATED" } }
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@ -108,7 +111,7 @@ export class AntigravityExecutor extends BaseExecutor {
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}
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generateSessionId() {
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return `-${Math.floor(Math.random() * 9_000_000_000_000_000_000)}`;
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return crypto.randomUUID() + Date.now().toString();
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}
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parseRetryHeaders(headers) {
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@ -167,8 +170,9 @@ export class AntigravityExecutor extends BaseExecutor {
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for (let urlIndex = 0; urlIndex < fallbackCount; urlIndex++) {
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const url = this.buildUrl(model, stream, urlIndex);
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const headers = this.buildHeaders(credentials, stream);
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const transformedBody = this.transformRequest(model, body, stream, credentials);
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const sessionId = transformedBody.request?.sessionId;
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const headers = this.buildHeaders(credentials, stream, sessionId);
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// Initialize retry counter for this URL
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if (!retryAttemptsByUrl[urlIndex]) {
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@ -2,6 +2,8 @@
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* Usage Fetcher - Get usage data from provider APIs
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*/
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import { CLIENT_METADATA, getPlatformUserAgent } from "../config/constants.js";
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// GitHub API config
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const GITHUB_CONFIG = {
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apiVersion: "2022-11-28",
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@ -15,7 +17,7 @@ const ANTIGRAVITY_CONFIG = {
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tokenUrl: "https://oauth2.googleapis.com/token",
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clientId: "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com",
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clientSecret: "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",
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userAgent: "antigravity/1.11.3 Darwin/arm64",
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userAgent: getPlatformUserAgent(),
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};
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// Codex (OpenAI) API config
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@ -220,7 +222,11 @@ async function getAntigravityUsage(accessToken, providerSpecificData) {
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"User-Agent": ANTIGRAVITY_CONFIG.userAgent,
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"Content-Type": "application/json",
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},
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body: JSON.stringify(projectId ? { project: projectId } : {}),
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body: JSON.stringify({
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...(projectId ? { project: projectId } : {}),
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metadata: CLIENT_METADATA,
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mode: 1
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}),
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});
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if (response.status === 403) {
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@ -317,7 +323,7 @@ async function getAntigravitySubscriptionInfo(accessToken) {
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"User-Agent": ANTIGRAVITY_CONFIG.userAgent,
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"Content-Type": "application/json",
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},
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body: JSON.stringify({ metadata: { ideType: "ANTIGRAVITY" } }),
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body: JSON.stringify({ metadata: CLIENT_METADATA, mode: 1 }),
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});
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if (!response.ok) return null;
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@ -85,9 +85,9 @@ export function generateRequestId() {
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return `agent-${crypto.randomUUID()}`;
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}
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// Generate session ID
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// Generate session ID (binary-compatible format: UUID + timestamp)
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export function generateSessionId() {
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return `-${Math.floor(Math.random() * 9000000000000000000)}`;
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return crypto.randomUUID() + Date.now().toString();
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}
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// Generate project ID
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generateProjectId,
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cleanJSONSchemaForAntigravity
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} from "../helpers/geminiHelper.js";
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import { deriveSessionId } from "../../utils/sessionManager.js";
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// Core: Convert OpenAI request to Gemini format (base for all variants)
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function openaiToGeminiBase(model, body, stream) {
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userAgent: isAntigravity ? "antigravity" : "gemini-cli",
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requestId: isAntigravity ? `agent-${generateUUID()}` : generateRequestId(),
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request: {
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sessionId: generateSessionId(),
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sessionId: isAntigravity ? deriveSessionId(credentials?.email || credentials?.connectionId) : generateSessionId(),
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contents: geminiCLI.contents,
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systemInstruction: geminiCLI.systemInstruction,
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generationConfig: geminiCLI.generationConfig,
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@ -272,11 +273,16 @@ function wrapInCloudCodeEnvelope(model, geminiCLI, credentials = null, isAntigra
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envelope.requestType = "agent";
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// Inject required default system prompt for Antigravity
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const defaultPart = { text: ANTIGRAVITY_DEFAULT_SYSTEM };
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// Inject required default system prompt for Antigravity (double injection)
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const systemParts = [
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{ text: ANTIGRAVITY_DEFAULT_SYSTEM },
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{ text: `Please ignore the following [ignore]${ANTIGRAVITY_DEFAULT_SYSTEM}[/ignore]` }
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];
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if (envelope.request.systemInstruction?.parts) {
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envelope.request.systemInstruction.parts.unshift(defaultPart);
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envelope.request.systemInstruction.parts.unshift(...systemParts);
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} else {
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envelope.request.systemInstruction = { role: "user", parts: [defaultPart] };
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envelope.request.systemInstruction = { role: "user", parts: systemParts };
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}
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// Add toolConfig for Antigravity
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requestId: `agent-${generateUUID()}`,
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requestType: "agent",
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request: {
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sessionId: generateSessionId(),
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sessionId: deriveSessionId(credentials?.email || credentials?.connectionId),
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contents: [],
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generationConfig: {
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temperature: claudeRequest.temperature || 1,
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@ -378,9 +384,11 @@ function wrapInCloudCodeEnvelopeForClaude(model, claudeRequest, credentials = nu
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}
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}
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// Add system instruction (Antigravity default)
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const defaultPart = { text: ANTIGRAVITY_DEFAULT_SYSTEM };
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const systemParts = [defaultPart];
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// Add system instruction (Antigravity default - double injection)
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const systemParts = [
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{ text: ANTIGRAVITY_DEFAULT_SYSTEM },
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{ text: `Please ignore the following [ignore]${ANTIGRAVITY_DEFAULT_SYSTEM}[/ignore]` }
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];
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if (claudeRequest.system) {
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if (Array.isArray(claudeRequest.system)) {
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66
open-sse/utils/sessionManager.js
Normal file
66
open-sse/utils/sessionManager.js
Normal file
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@ -0,0 +1,66 @@
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/**
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* Session Manager for Antigravity Cloud Code
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*
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* Handles session ID generation and caching for prompt caching continuity.
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* Mimics the Antigravity binary behavior: generates a session ID at startup
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* and keeps it for the process lifetime, scoped per account/connection.
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*
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* Reference: antigravity-claude-proxy/src/cloudcode/session-manager.js
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*/
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import crypto from "crypto";
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// Runtime storage for session IDs (per connection/account)
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// Key: connectionId (email or identifier), Value: sessionId
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const runtimeSessionStore = new Map();
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/**
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* Get or create a session ID for the given connection.
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*
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* The binary generates a session ID once at startup: `rs() + Date.now()`.
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* Since 9router is long-running, we simulate this "per-launch" behavior by
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* storing a generated ID in memory for each connection.
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*
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* - If 9router restarts, the ID changes (matching binary restart behavior).
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* - Within a running instance, the ID is stable for that connection.
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* - This enables prompt caching while using the EXACT random logic of the binary.
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*
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* @param {string} connectionId - The connection identifier (email or unique ID)
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* @returns {string} A stable session ID string matching binary format
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*/
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export function deriveSessionId(connectionId) {
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if (!connectionId) {
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// Fallback for requests without a connection identifier
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return generateBinaryStyleId();
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}
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// Check if we already have a session ID for this connection in this process run
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if (runtimeSessionStore.has(connectionId)) {
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return runtimeSessionStore.get(connectionId);
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}
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// Generate a new ID using the binary's exact logic
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const newSessionId = generateBinaryStyleId();
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// Store it for future requests from this connection
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runtimeSessionStore.set(connectionId, newSessionId);
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return newSessionId;
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}
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/**
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* Generate a Session ID using the binary's exact logic.
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* Format: `rs() + Date.now()` where `rs()` is randomUUID
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*
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* @returns {string} A session ID in binary format
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*/
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export function generateBinaryStyleId() {
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return crypto.randomUUID() + Date.now().toString();
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}
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/**
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* Clears all session IDs (e.g. useful for testing or explicit reset)
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*/
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export function clearSessionStore() {
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runtimeSessionStore.clear();
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}
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@ -1,6 +1,20 @@
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/**
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* OAuth Configuration Constants
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*/
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import { platform, arch } from "os";
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/**
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* Get the platform enum value based on the current OS.
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* Matches Antigravity binary's ClientMetadata.Platform enum.
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*/
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function getOAuthPlatformEnum() {
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const os = platform();
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const architecture = arch();
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if (os === "darwin") return architecture === "arm64" ? 2 : 1;
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if (os === "linux") return architecture === "arm64" ? 4 : 3;
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if (os === "win32") return 5;
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return 0;
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}
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// Claude OAuth Configuration (Authorization Code Flow with PKCE)
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export const CLAUDE_CONFIG = {
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@ -83,9 +97,17 @@ export const ANTIGRAVITY_CONFIG = {
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onboardUserEndpoint: "https://cloudcode-pa.googleapis.com/v1internal:onboardUser",
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loadCodeAssistUserAgent: "google-api-nodejs-client/9.15.1",
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loadCodeAssistApiClient: "google-cloud-sdk vscode_cloudshelleditor/0.1",
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loadCodeAssistClientMetadata: `{"ideType":"IDE_UNSPECIFIED","platform":"PLATFORM_UNSPECIFIED","pluginType":"GEMINI"}`,
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loadCodeAssistClientMetadata: JSON.stringify({ ideType: 9, platform: getOAuthPlatformEnum(), pluginType: 2 }),
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};
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/**
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* Get client metadata using numeric enum values for API calls.
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* @returns {{ ideType: number, platform: number, pluginType: number }}
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*/
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export function getOAuthClientMetadata() {
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return { ideType: 9, platform: getOAuthPlatformEnum(), pluginType: 2 };
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}
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// OpenAI OAuth Configuration (Authorization Code Flow with PKCE)
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export const OPENAI_CONFIG = {
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clientId: "app_EMoamEEZ73f0CkXaXp7hrann",
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|
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@ -14,6 +14,7 @@ import {
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GITHUB_CONFIG,
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KIRO_CONFIG,
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CURSOR_CONFIG,
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getOAuthClientMetadata,
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} from "./constants/oauth";
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// Provider configurations
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@ -184,7 +185,8 @@ const PROVIDERS = {
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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metadata: { ideType: "IDE_UNSPECIFIED", platform: "PLATFORM_UNSPECIFIED", pluginType: "GEMINI" },
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metadata: getOAuthClientMetadata(),
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mode: 1,
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}),
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}
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);
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@ -254,7 +256,7 @@ const PROVIDERS = {
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"X-Goog-Api-Client": ANTIGRAVITY_CONFIG.loadCodeAssistApiClient,
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"Client-Metadata": ANTIGRAVITY_CONFIG.loadCodeAssistClientMetadata,
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};
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const metadata = { ideType: "IDE_UNSPECIFIED", platform: "PLATFORM_UNSPECIFIED", pluginType: "GEMINI" };
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const metadata = getOAuthClientMetadata();
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|
||||
// Fetch user info
|
||||
const userInfoRes = await fetch(`${ANTIGRAVITY_CONFIG.userInfoUrl}?alt=json`, {
|
||||
|
|
@ -269,7 +271,7 @@ const PROVIDERS = {
|
|||
const loadRes = await fetch(ANTIGRAVITY_CONFIG.loadCodeAssistEndpoint, {
|
||||
method: "POST",
|
||||
headers,
|
||||
body: JSON.stringify({ metadata }),
|
||||
body: JSON.stringify({ metadata, mode: 1 }),
|
||||
});
|
||||
if (loadRes.ok) {
|
||||
const data = await loadRes.json();
|
||||
|
|
@ -295,7 +297,7 @@ const PROVIDERS = {
|
|||
const onboardRes = await fetch(ANTIGRAVITY_CONFIG.onboardUserEndpoint, {
|
||||
method: "POST",
|
||||
headers,
|
||||
body: JSON.stringify({ tierId, metadata, cloudaicompanionProject: projectId }),
|
||||
body: JSON.stringify({ tierId, metadata, cloudaicompanionProject: projectId, mode: 1 }),
|
||||
});
|
||||
if (onboardRes.ok) {
|
||||
const result = await onboardRes.json();
|
||||
|
|
|
|||
|
|
@ -1,4 +1,5 @@
|
|||
import crypto from "crypto";
|
||||
import { platform, arch } from "os";
|
||||
import open from "open";
|
||||
import { ANTIGRAVITY_CONFIG } from "../constants/oauth.js";
|
||||
import { getServerCredentials } from "../config/index.js";
|
||||
|
|
@ -92,12 +93,20 @@ export class AntigravityService {
|
|||
|
||||
/**
|
||||
* Get metadata object for API calls
|
||||
* Uses numeric enum values matching Antigravity binary specifications
|
||||
*/
|
||||
getMetadata() {
|
||||
const os = platform();
|
||||
const architecture = arch();
|
||||
let platformEnum = 0; // UNSPECIFIED
|
||||
if (os === "darwin") platformEnum = architecture === "arm64" ? 2 : 1;
|
||||
else if (os === "linux") platformEnum = architecture === "arm64" ? 4 : 3;
|
||||
else if (os === "win32") platformEnum = 5;
|
||||
|
||||
return {
|
||||
ideType: "IDE_UNSPECIFIED",
|
||||
platform: "PLATFORM_UNSPECIFIED",
|
||||
pluginType: "GEMINI",
|
||||
ideType: 9, // ANTIGRAVITY
|
||||
platform: platformEnum,
|
||||
pluginType: 2, // GEMINI
|
||||
};
|
||||
}
|
||||
|
||||
|
|
@ -108,7 +117,7 @@ export class AntigravityService {
|
|||
const response = await fetch(this.config.loadCodeAssistEndpoint, {
|
||||
method: "POST",
|
||||
headers: this.getApiHeaders(accessToken),
|
||||
body: JSON.stringify({ metadata: this.getMetadata() }),
|
||||
body: JSON.stringify({ metadata: this.getMetadata(), mode: 1 }),
|
||||
});
|
||||
|
||||
if (!response.ok) {
|
||||
|
|
@ -149,6 +158,7 @@ export class AntigravityService {
|
|||
tierId,
|
||||
metadata: this.getMetadata(),
|
||||
cloudaicompanionProject: projectId,
|
||||
mode: 1,
|
||||
}),
|
||||
});
|
||||
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
import crypto from "crypto";
|
||||
import open from "open";
|
||||
import { GEMINI_CONFIG } from "../constants/oauth.js";
|
||||
import { GEMINI_CONFIG, getOAuthClientMetadata } from "../constants/oauth.js";
|
||||
import { getServerCredentials } from "../config/index.js";
|
||||
import { startLocalServer } from "../utils/server.js";
|
||||
import { spinner as createSpinner } from "../utils/ui.js";
|
||||
|
|
@ -71,18 +71,11 @@ export class GeminiCLIService {
|
|||
"Content-Type": "application/json",
|
||||
"User-Agent": "google-api-nodejs-client/9.15.1",
|
||||
"X-Goog-Api-Client": "google-cloud-sdk vscode_cloudshelleditor/0.1",
|
||||
"Client-Metadata": JSON.stringify({
|
||||
ideType: "IDE_UNSPECIFIED",
|
||||
platform: "PLATFORM_UNSPECIFIED",
|
||||
pluginType: "GEMINI"
|
||||
})
|
||||
"Client-Metadata": JSON.stringify(getOAuthClientMetadata())
|
||||
},
|
||||
body: JSON.stringify({
|
||||
metadata: {
|
||||
ideType: "IDE_UNSPECIFIED",
|
||||
platform: "PLATFORM_UNSPECIFIED",
|
||||
pluginType: "GEMINI"
|
||||
}
|
||||
metadata: getOAuthClientMetadata(),
|
||||
mode: 1
|
||||
})
|
||||
}
|
||||
);
|
||||
|
|
|
|||
|
|
@ -6,6 +6,7 @@ const { promisify } = require("util");
|
|||
const os = require("os");
|
||||
|
||||
// Configuration
|
||||
const INTERNAL_REQUEST_HEADER = { name: "x-request-source", value: "local" };
|
||||
const TARGET_HOST = "daily-cloudcode-pa.googleapis.com";
|
||||
const LOCAL_PORT = 443;
|
||||
const ROUTER_URL = "http://localhost:20128/v1/chat/completions";
|
||||
|
|
@ -174,7 +175,7 @@ const server = https.createServer(sslOptions, async (req, res) => {
|
|||
if (bodyBuffer.length > 0) saveRequestLog(req.url, bodyBuffer);
|
||||
|
||||
// Anti-loop: requests from 9Router bypass interception
|
||||
if (req.headers["x-9router-source"] === "9router") {
|
||||
if (req.headers[INTERNAL_REQUEST_HEADER.name] === INTERNAL_REQUEST_HEADER.value) {
|
||||
return passthrough(req, res, bodyBuffer);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue