Building Idempotency Keys and Dedupe Stores in TypeScript with Antigravity
A production guide to designing idempotency keys and dedupe stores in TypeScript with Antigravity — covering Stripe webhook retries, Temporal replays, and the Cloudflare KV / Redis / Postgres trade-offs you actually need to choose between.
Building a Stripe Dunning Recovery Pipeline with Antigravity AI Agents — Stop Failed Payments from Becoming Churn
Wire Antigravity AI agents into Stripe Smart Retries to recover failed payments before they turn into churn. Webhooks, idempotency, AI-tailored email copy, Slack escalation, and winback offers — all in one production-ready pattern.
Antigravity Agent Product Blueprint — A 90-Day Plan Built on Gates and an Exit Line
A 90-day plan for turning an AgentKit 2.0 build into a product an indie developer can sell, organized around go/no-go gates instead of task lists. Includes an SDK-agnostic run wrapper, a D1 daily quota guard, a signature-verified Stripe webhook, and a break-even formula.
Build an AI Agent SaaS with Antigravity × AgentKit 2.0 × Stripe — A Complete Implementation Guide for Solo Developers
How to build a subscription AI agent SaaS with AgentKit 2.0, Stripe and Antigravity. Architecture, billing, Webhook idempotency, production deployment — plus the Redis concurrency-slot bug that quietly locks out your heaviest users.
Wiring Next.js + Supabase + Stripe Subscriptions with Antigravity — What I Delegated and What I Wrote by Hand
A working record of letting Antigravity agents build the Next.js and Supabase foundation while writing the Stripe Checkout and webhook layer by hand. Covers signature verification, idempotency, and the metadata handoff that quietly breaks generated payment code.
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.
Antigravity × Stripe Custom MCP Server: Complete Implementation Guide — Autonomous AI-Driven Billing
Build a custom MCP server that wraps the Stripe API, letting Antigravity's AI agents autonomously handle subscriptions, Webhooks, and multi-tenant billing. A complete TypeScript implementation guide for production-grade SaaS billing.
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.
Building an Agent-Driven SaaS on Antigravity and Stripe — A Complete 2026 Implementation Guide
An end-to-end implementation guide for shipping an automation SaaS built on Antigravity's agent capabilities, Stripe, and Cloudflare Workers — covering task queuing, concurrency control, webhook handling, and the agent-specific edge cases (timeouts, partial failure, cost runaway) that always show up.
Build a Complete SaaS in Antigravity — Stripe Billing, Auth, and Deployment Without Leaving Your IDE
Build an entire SaaS product within Antigravity IDE — from Supabase auth to Stripe billing to Cloudflare Workers deployment, without switching tools.
Building Webhook Endpoints in Antigravity That Never Drop Events
A practical guide to designing, implementing, and testing webhook endpoints for Stripe and GitHub using Antigravity, focused on the three properties that prevent dropped events: signature verification, idempotency, and fast response.
Building a Subscription SaaS on Antigravity Multi-Agent — Role Splits, Quotas, and Stripe Integration That Actually Stick
Antigravity multi-agent is fun to demo. Turning it into the core of a paying subscription SaaS is a different game. Here's the implementation playbook — agent role splits, idempotent task queues, Stripe metered billing, and retention — with working TypeScript code.