When Your Antigravity Agent's Usage Ledger Quietly Drifts From Stripe's Bill — Field Notes on Idempotency, Late Events, and Reconciliation
Usage-based billing for Antigravity agents fails silently when your internal usage ledger and Stripe's Meter Events aggregation drift apart. Field notes on idempotency keys, absorbing late events, the 35-day window, and a daily reconciliation job.
Containing Failure in Antigravity Multi-Agent Systems: Three Boundaries That Stop Cascades
Antigravity multi-agent setups run beautifully in isolation but cascade in production, where one small failure drags the whole orchestration down. These notes organize the fix around three boundaries—layered control, trust separation, and observability with idempotency—down to the TOML and the correlation-ID wrapper.
Driving Unreal Engine Projects from Antigravity — Patterns from Building an Art Installation
Attaching Antigravity 2.0 agents to an Unreal Engine 5.5 project — across Blueprints and C++ — surfaced a real division of labor between editor work and agent-driven edits. Here are the patterns that actually held up through a live installation.
Building a Subscription AI Agent Service with AgentKit 2.0 — Stripe Billing to Monthly Revenue Design
Complete guide to building and monetizing a subscription-based AI agent service using AgentKit 2.0. Covers Stripe integration, multi-agent design, pricing strategy, and churn prevention — everything needed to reach stable monthly recurring revenue.
Google Antigravity May 2026 Updates: New Features and What Changed
A roundup of Google Antigravity's May 2026 updates, written from hands-on use: where each change actually helped and where it tripped me up. Covers AgentKit 2.0, A2A protocol support, local LLM improvements, Gemma 4, and context window expansion.
Multi-Agent CI/CD Quality Gate — Automating PR Review, Testing, and Security with Antigravity × GitHub Actions
A complete implementation guide for building a multi-agent CI/CD quality gate using AgentKit 2.0 and GitHub Actions. Covers parallel code review, test generation, and security scanning agents — with production cost management and pitfall solutions.
Google Antigravity May 2026 Update Roundup — UE5 Integration, A2A Support, AgentKit 2.0 Refinements
What's worth knowing in Google Antigravity as of May 2026: Unreal Engine 5 integration, the A2A protocol, and AgentKit 2.0 refinements — covered with the on-device behavior I observed, not the marketing copy.
Building Validation Loops in Antigravity Agents: 3 Patterns for AI-Verified Output
Make your Antigravity agents verify their own work. This guide walks through three practical validation loop patterns — Self-Verifier, Critic-Approver, and Test-Driven — with working code examples in AgentKit 2.0.
Stateful AI Agents on Antigravity × Cloudflare Durable Objects — One Session, One Instance, One Place to Manage Conversation, Tools, and Cost
How to deploy an Antigravity AgentKit 2.0 agent onto Cloudflare Durable Objects so that conversation history, tool-call state, and token spend live inside a single instance per session — with the actual code and production cost numbers from my own deployment.
Versioning and A/B Testing Prompts for Production AI Agents in Antigravity
Hard-coding prompts in production turns improvement into guesswork. This guide walks through registry design, A/B traffic routing, statistical promotion, and rollback — with code you can ship inside your Antigravity environment.
Building Self-Healing Antigravity Agents — Detection, Diagnosis, and Recovery in Production
A practical three-layer pattern for keeping Antigravity agents alive in production: signal-based detection, deterministic diagnosis, and graduated recovery — with full AgentKit 2.0 code and the production traps I learned the hard way.
Antigravity April 2026 Update — A Builder's Roundup of the Seven Features That Matter
The Antigravity April 2026 update is one of those quietly important releases — nothing flashy, but seven changes that will make your day-to-day better. This roundup ranks them by what actually helps a working developer first, with practical notes from someone using the tool every day.