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Antigravity Manager - Setup Guide

Source: reason-machines/trending-skills (1,396+ installs) Category: Agent Infrastructure / LLM Operations Quality Tier: 🔵 Community

Antigravity Manager is a professional AI account manager and proxy gateway (Tauri v2 + Rust desktop app, plus a headless Docker/server mode). It takes Google (Gemini) and Anthropic (Claude) web session accounts and exposes them as standard OpenAI-compatible, Anthropic-native, and Gemini-native API endpoints with intelligent multi-account rotation, quota tracking, and automatic failover. This skill (from the ara.so Daily 2026 Skills collection) walks an agent through installing, configuring, and operating the gateway.

Installation

Step 1 - Install the skill

npx skills add reason-machines/trending-skills --skill antigravity-manager

The publisher org was renamed aradotso → reason-machines on Sep 12, 2026. The legacy aradotso/trending-skills install path still resolves (GitHub 301 redirect), but reason-machines is canonical.

Step 2 - Install Antigravity Manager itself

Method Command
One-line installer (Linux/macOS) curl -fsSL https://raw.githubusercontent.com/lbjlaq/Antigravity-Manager/v4.1.30/install.sh | bash
Homebrew brew tap lbjlaq/antigravity-manager https://github.com/lbjlaq/Antigravity-Manager && brew install --cask antigravity-tools
Docker (headless server) docker run -d --name antigravity-manager -p 8045:8045 -e API_KEY=$ANTIGRAVITY_API_KEY -e WEB_PASSWORD=$ANTIGRAVITY_WEB_PASSWORD -v ~/.antigravity_tools:/root/.antigravity_tools lbjlaq/antigravity-manager:latest
Manual Download .dmg / .msi / .deb / .rpm / .AppImage from GitHub Releases

Prerequisites

Requirement Notes
Google account(s) with Gemini access Authorized via the OAuth 2.0 URL generated in the app
Anthropic account(s) with Claude access Same OAuth flow
Docker (server mode) or desktop OS Headless server mode is built from source with --features headless
API_KEY Authenticates proxy API calls
WEB_PASSWORD (recommended) Separate web UI admin password; falls back to API_KEY

Capabilities

Capability Trigger / Detail
Multi-account rotation Auto-rotates accounts on 429/401 errors with millisecond failover
Protocol conversion Web sessions → OpenAI (/v1/chat/completions), Anthropic (/v1/messages), Gemini (generateContent)
Model routing Regex remaps in gui_config.json, e.g. gpt-4.* → gemini-2.5-pro
Tiered routing Prioritizes accounts Ultra → Pro → Free; fast-reset accounts consumed first
Background-task demotion Background requests auto-redirected to Flash-tier models to preserve premium quota
Quota dashboard Live Gemini Pro/Flash, Claude, and Imagen 3 quotas with smart recommendation
403 detection Banned accounts flagged and skipped during rotation
Batch account import JSON import of {token, type, label} records

API Endpoints

The proxy listens on port 8045 by default.

Protocol Endpoint Compatible with
OpenAI-compatible POST http://localhost:8045/v1/chat/completions Any OpenAI SDK client
Anthropic-native POST http://localhost:8045/v1/messages Claude Code
Gemini-native POST http://localhost:8045/v1/models/{model}:generateContent Gemini clients

Example (OpenAI SDK - Gemini through the gateway):

import os
from openai import OpenAI

client = OpenAI(
 api_key=os.environ["ANTIGRAVITY_API_KEY"],
 base_url="http://localhost:8045/v1",
)
resp = client.chat.completions.create(
 model="gemini-2.5-pro",
 messages=[{"role": "user", "content": "Hello"}],
)

Connecting Agent Clients

Claude Code - point the Anthropic env vars at the gateway:

export ANTHROPIC_API_KEY=$ANTIGRAVITY_API_KEY
export ANTHROPIC_BASE_URL=http://localhost:8045
claude

Any OpenAI-compatible client (Cherry Studio, Cursor, Continue.dev, or an OpenAI-compatible provider in an agent config): base URL http://localhost:8045/v1 plus the gateway API key.

CorpusIQ Use Cases

  • Agent fleet failover - point OpenAI-compatible agents at the gateway for automatic 429/401 rotation across accounts.
  • Model-cost arbitrage - remap hard-coded model names to cheaper tiers (gpt-4.* → gemini-2.5-flash) without touching client code.
  • Quota monitoring - one dashboard for every Gemini/Claude account an agent fleet consumes.
  • Premium-quota protection - background tasks auto-demote to Flash-tier models.
  • Provider experimentation - test OpenAI/Anthropic/Gemini protocols against one local gateway before committing to a provider.

Security & Compliance Notes

  • No skills.sh security audits published for this skill (no Trust Hub / Socket / Snyk verdicts render on the publisher page) - review before production use.
  • The upstream tool repo (lbjlaq/Antigravity-Manager, 31K+ stars, pushed Sep 12 2026) ships no standard license (GitHub API: NOASSERTION).
  • The gateway proxies web session tokens, not official API keys. Upstream providers may flag or ban accounts used this way (the built-in 403 detection exists for exactly this case). Review Google/Anthropic terms before production use.

Troubleshooting

Issue Fix
Port 8045 in use lsof -ti:8045 | xargs kill -9 or change proxy.port in ~/.antigravity_tools/gui_config.json
Forgotten credentials docker logs antigravity-manager or grep gui_config.json for api_key / admin_password
Account 403 / banned Marked in UI and skipped; add a fresh account and remove the banned one
All accounts 429 Rotation exhausted - add accounts or wait for quota reset; check the dashboard
macOS Gatekeeper xattr -d com.apple.quarantine /Applications/Antigravity\ Tools.app
Claude Code not connecting Verify the proxy responds and env vars are exported

Verification

# Gateway responds on the models endpoint
curl -s http://localhost:8045/v1/models -H "Authorization: Bearer ${ANTIGRAVITY_API_KEY}"

# Full round-trip through the OpenAI-compatible endpoint
curl -s http://localhost:8045/v1/chat/completions \
 -H "Content-Type: application/json" \
 -H "Authorization: Bearer ${ANTIGRAVITY_API_KEY}" \
 -d '{"model":"gemini-2.5-pro","messages":[{"role":"user","content":"ping"}]}'

Notes

Contact Terms Privacy Pricing