Jonathan Fulton

Staff Software Engineer at Datadog. Catholic. Husband. Father of three.

[Jonathan Fulton @JonathanSFulton]

Clean Code in the Age of AI: https://t.co/Z47lDwYH8x

1. Tests are more important than they’ve ever been
2. Dependency structure matters more than local cleanliness
3. Data models are foundational — and AI is still bad at them
4. Use an ORM — and be explicit about your schema

[Jonathan Fulton @JonathanSFulton]

I wrote this a few weeks ago and it keeps getting more true: open-weight models finally hit frontier-class capability — at the exact moment the hardware to run them locally evaporated.

The weights are free and MIT-licensed. The silicon is spoken for until 2028.

https://t.co/N3jqWTyrVO

[Jonathan Fulton @JonathanSFulton]

Not sure why it needs to be said in the United States of all places but I guess it needs to be said.

Communism has literally never worked. Not once. Not ever.

Yo far left, please stop being dumb.

[Jonathan Fulton @JonathanSFulton]

I put GPT 5.6 Sol through the same gauntlet as Claude Fable 5—including rebuilding a financial app, cloning Linear, and porting a 100k-line Python SQL parser to Go.

My verdict: nearly as capable, sometimes better—and actually available.

https://t.co/wfLqOjeZ6d

[Jonathan Fulton @JonathanSFulton]

I spent $1,000 in 5.5 hours with the Fable 5 model. Best money I ever spent on software.

Then a government directive shut it off. Subscription active, use case unchanged, capability gone.

That’s when “sovereign AI” stopped being a buzzword for me. New post: https://t.co/N3jqWTyrVO

[Jonathan Fulton @JonathanSFulton]

This is fantastic!

[Girl patriot 🙏 🇺🇸 🦅 @Girlpatriot1974]

Welcome to The Land of the Free!
🇺🇸🌏
God Bless America. 🙏

[Jonathan Fulton @JonathanSFulton]

@CLT_Exam Most people didn’t go to college (or even high school for that matter). It was only the elite 1-2% that did “back in the day”. Since that ballooned to 1/3 the population and at an expansive cost, of course the questions changed. https://t.co/77JPkVIvKM

[Jonathan Fulton @JonathanSFulton]

AI can make developers 2–4x more productive while adding just 5–10% to development costs.

That should be an obvious investment. But when companies can’t find their next growth curve, even 10% feels expensive.

My latest:

https://t.co/YV6fnnu2gH

[Jonathan Fulton @JonathanSFulton]

A short review of Anthropic’s Fable 5: https://t.co/cWQ9Vvg358

[Jonathan Fulton @JonathanSFulton]

I tested Fable pretty extensively. Ran it for 5.5 hours translating sqlglot from Python to Go (~100k LOC). I spent $700 of my own money and used subscription limits for the rest. So probably something like $1500 if all on usage. And it was running 9 subagents in parallel at times. So a year+ of worth done in 5.5 hours at a cost of $1500. Easily worth it if you’re building a business and think your features / platforms impact revenue.

[Jonathan Fulton @JonathanSFulton]

I'm a software engineer. I write code for a living.

And I'm telling you: my profession is being automated in real-time.

Using AI coding tools, my productivity increased 4-8x. If one dev can do the work of six, what happens to the other five?

I analyzed 65 million jobs. 60% face disruption by 2035.

The uncomfortable truth? A PhD won't save you. A plumber's license might.

https://t.co/sg4YciJG81

[Jonathan Fulton @JonathanSFulton]

@NovusOrdoWatch would love to get your thoughts on this: https://t.co/tk7qXGQEd3

[Jonathan Fulton @JonathanSFulton]

@DrKwasniewski would appreciate your help distributing this: https://t.co/tk7qXGQ6nv
I know you recently said you don't engage with Sedevacantists but I figured this might help. I used to be a Sedevacantist for 3 years before turning back to the Catholic Church. This is why.

[Jonathan Fulton @JonathanSFulton]

Tesla Full Self Driving (FSD) for the win! Had a fantastic drive from Charlotte, NC to Washington, DC, which was >400 miles. Other than a couple times when it was raining too hard for the cameras, I didn’t need to touch the controls while en route. Truly living in the future! #Tesla #TeslaFSD

[Jonathan Fulton @JonathanSFulton]

@catholicpat 1) Imitation of Christ by Thomas a Kempis
2) The Passion and the Death of Jesus Christ by St. Alphonsus Liguori
3) The Dark Night of the Soul by St. John of the Cross
4) Preparation for Death by St. Alphonsus Liguori
5) The Sermons of St. Alphonsus Liguori

[Jonathan Fulton @JonathanSFulton]

Check out my review of Cursor AI Code Editor, a truly next gen tool that will level up your coding. https://t.co/lUoGt3xUPg
@anysphere @cursor_ai

[Jonathan Fulton @JonathanSFulton]

Trying out @cursor_ai. So far I'm loving it, highly recommend. I upgraded to their Pro plan. https://t.co/F27jU3QFxB

[Jonathan Fulton @JonathanSFulton]

Romans 13:1-2

Let every person be subject to the governing authorities. For there is no authority except from God, and those that exist have been instituted by God. Therefore he who resists the authorities resists what God has appointed, and those who resist will incur judgment.

[Jonathan Fulton @JonathanSFulton]

Protestants, how do you know when to celebrate Easter? Thats not in the Bible. What authority do you use?

[Jonathan Fulton @JonathanSFulton]

Here's a summary of Bible verses that illustrate that justification is a process and not a one time "once saved always saved".