James O'Reilly

Developer Relations Engineer

[James O'Reilly @JamesOR]

I asked top builders and leaders for the prompts they love to use the most.

Here's 9 that they've shared with me plus one of my own...
https://t.co/zFngxOe6hW

What's your one indispensable prompt? 👇

[James O'Reilly @JamesOR]

Not sure which of the @antigravity surfaces is best for your agentic development workflow? @lukeschlangen and @alexastrum guide you through it.

[Luke Schlangen @lukeschlangen]

@antigravity has four different surfaces. Which one should you use?

We wrote a blog post to help you figure it out.
https://t.co/hZ9Yi273aW

[James O'Reilly @JamesOR]

Codelab: https://t.co/l83gEWcilw

Automating legacy modernization at scale using agentic pipelines and Antigravity

[James O'Reilly @JamesOR]

Engineering teams frequently inherit monolithic codebases that are not well documented and riddled with tech debt.

In this codelab, I provide step-by-step instructions to build a highly structured, open-source multi-agent orchestration framework.

By using low freedom guardrails, you can perform a reliable greenfield migration complete with @antigravity browser subagent verification.

You'll learn to:
🔹 Separate deterministic and heuristic tasks
🔹 Implement advanced agent design patterns
🔹 Set up closed-loop, self-healing TDD pipelines

[James O'Reilly @JamesOR]

Building autonomous agents usually means wrestling with context window bloat.

Google's new @antigravity SDK solves this by letting a main agent delegate heavy lifting to isolated subagents, keeping the core loop clean. Excellent look at the future of agent orchestration and runtime safety by @kweinmeister.

What will you build with the SDK?

[Karl Weinmeister @kweinmeister]

The Google @antigravity SDK enables you to embed Antigravity agent capabilities directly into your codebase.

My latest article walks through how to get started, then explains each architectural concept in the SDK.

https://t.co/SZ1lvmVUoD

[James O'Reilly @JamesOR]

In the latest Agent Factory episode, Google's @rodydavis shows @shirmeir86 how he uses Google @antigravity to orchestrate parallel sub-agents and eliminate developer toil. It's an episode you'll be glad you watched.

[Rody Davis @rodydavis]

Just stopped by The Agent Factory to talk all things Google Antigravity 2.0! 🚀

We dove deep into using skills, multi-agent parallelism, and why I’m leaning into flat architectures.

@antigravity @googlecloud @GoogleCloudTech #AgentFactory

https://t.co/cagUHhGHyS

[Rody Davis @rodydavis]

Just stopped by The Agent Factory to talk all things Google Antigravity 2.0! 🚀

We dove deep into using skills, multi-agent parallelism, and why I’m leaning into flat architectures.

@antigravity @googlecloud @GoogleCloudTech #AgentFactory

https://t.co/cagUHhGHyS

[James O'Reilly @JamesOR]

@rodydavis has taken the #NapkinChallenge and was able to build a working @Android app in under 3 minutes. What will you build?

[Rody Davis @rodydavis]

Can a hand-drawn sketch become a working @Android app in under 3 minutes with @antigravity ?

✔️Challenge accepted!

#NapkinChallenge #Gemini35 #BuildInPublic

I challenge:
@NoheDev @jocarrasqueira @jason_mayes

[Rody Davis @rodydavis]

Can a hand-drawn sketch become a working @Android app in under 3 minutes with @antigravity ?

✔️Challenge accepted!

#NapkinChallenge #Gemini35 #BuildInPublic

I challenge:
@NoheDev @jocarrasqueira @jason_mayes

[James O'Reilly @JamesOR]

Can a hand-drawn napkin sketch become a working app in under 3 minutes?

✔️Challenge accepted!

I built a low-tech MIDI sequencer for kids tapping boxes looping beats infinitely in a colorful visualizer. 🎹🥁🎶

Watch me take a sketch and build it using @antigravity 2.0 + @Gemini 3.5 Flash (Medium) in under 2 minutes! Video below 👇

I challenge:
@geekyouup
@rodydavis
@ChrisDemeke

#NapkinChallenge #Gemini35 #BuildInPublic

[James O'Reilly @JamesOR]

@JackWoth98 @geekyouup I love this was written in Go. Quickly becoming my new favorite language.

[James O'Reilly @JamesOR]

@ChrisDemeke @antigravity Sounds like an enjoyable morning.

[James O'Reilly @JamesOR]

@rodydavis @antigravity Yes!

[James O'Reilly @JamesOR]

@rodydavis @antigravity Come by the Antigravity Arcade to build a game and play it on an arcade machine.

[James O'Reilly @JamesOR]

If you're at Google I/O 2026, stop by the Antigravity Arcade demo area. Build an arcade game using @antigravity and collect this exclusive Antigravity Arcade Google Developer Profile badge!

[James O'Reilly @JamesOR]

@geekyouup Let’s GO!

[James O'Reilly @JamesOR]

@LyalinDotCom Fun side-project project, I like the use of Gemma here. Could you also update the page's DOM to inline tool tips for presenting addl. info such as fact-checking, contrarian POV, or deep-dive links for more info on a topic.

[James O'Reilly @JamesOR]

Dive into the technical play-by-play of this AI-driven migration and find the Github repo: https://t.co/aGyho19t8y

[James O'Reilly @JamesOR]

Google Antigravity is a Mission Control. 🛰️

In a traditional legacy migration, you’d spend weeks documenting business logic, data models and side-effects.

Using my `/orchestrating-greenfield-migration` skill, the process is transformed into a 5-phase autonomous workflow that leverages multiple specialized AI agents:

1️⃣ Audit: Reverse-engineers Express logic
2️⃣ Test Gen: Writes strict functional tests that fail
3️⃣ Scaffold: Builds Next.js project to pass tests
4️⃣ UI Gen: Translates patterns to ShadCN/Tailwind
5️⃣ Verify: Visual "Proof of Work" via automated browser recordings

This is efficiency through multi-agent orchestration.

[James O'Reilly @JamesOR]

@johnlindquist I sea what you did their John.