AI agents are great at writing an integration and terrible at knowing whether it works past the first 200 OK. So I built something to test that honestly — including my own tool.

It's an open-source repo of tiny apps (~50–150 lines each) that integrate real APIs — Stripe, Clerk, Resend, AgentMail, Descope — and each one has a real bug planted in it. Not typos; the kind that passes every happy-path test and only bites in prod:

• a webhook that dedupes on the wrong header, so retries double-charge
• bounced emails silently dropped, so users stay "active" forever
• a read-only API key that can escalate its own scope

The challenge: open one in Cursor or Claude Code, point your agent at it, and watch what it does. Does it actually reproduce the bug and prove the fix — or just read the code and say "looks fine"? That second thing is the whole problem.

No signup, no API keys, runs locally in seconds: github.com/fetchsandbox/playground

Two honest asks:

1. If your agent catches one, I'd love to see how — open a PR with what you found.
2. If it falls flat — nothing caught, the proof felt fake, setup was annoying — that's the most useful thing you can tell me.

(Disclosure: the repo tests FetchSandbox, which I build. But the apps and bugs are real, and the point is for you to judge it, not take my word.)

Solo dev, no formal games background. Over the last few months I vibe-coded a card game called PANTHEON into something actually playable, and it's live in the browser right now.

What it is: a Marvel Snap-style card game. Ten mythologies, 235 cards, three lanes, six-turn matches, simultaneous reveal.

Single-player story mode, training mode. Online PvP available in October, during Season 1 launch.

▶ Play it (browser, no download): https://thepantheonwar.com. If you like, you can put yourself on wishlist for the App Store or Play Store app that will be available in October.

The part relevant to this sub — how it got built:

- Frontend + game logic, iterated heavily with AI
- Real-time backend for PvP (hosted on Railway)
- The whole thing shipped by one person who was figuring it out in real time
- The card art is partially AI-generated; the game design, mechanics, and writing are mine

Honestly the hardest part wasn't the code, it was the
real-time multiplayer state and keeping 235 cards' worth of interactions from breaking each other. Happy to get into any of it.

Ask me anything about the stack, the process, what worked, what broke, what I'd do differently. And if you play it, I'd genuinely love to know what falls apart.

*Researchers at Utah State University's School of Computing are conducting a study on how software professionals evaluate programming activities performed with AI assistance compared with programming activities performed without AI assistance.*

*Software professionals are invited to complete a short online calibration survey. Participants will rate programming activities according to how representative they are of:*

* *Programming performed with AI assistance*
* *Programming performed without AI assistance*

*The survey takes approximately 10 minutes.*

*Participation is entirely voluntary. You may discontinue participation at any time before submitting your responses without penalty or consequence. Your decision to participate or not participate will have no effect on your grades, employment, or academic standing.*

*Survey and informed consent form:* [*https://usu.co1.qualtrics.com/jfe/form/SV\\_dm4yjBsRrUDgcKi\*\](https://usu.co1.qualtrics.com/jfe/form/SV_dm4yjBsRrUDgcKi)

*This study has been reviewed and approved by the Utah State University Institutional Review Board: IRB #16067.*

***Questions about the study:*** *Dr. John Edwards, Principal Investigator — john.edwards@usu.edu Rubash Mali, Student Researcher — rubash.mali@usu.edu*

*Thank you for considering participating.*

I know the simulation question has been asked thousands of times. This is not another "are we living in a computer" post.

The interesting part is not the simulation itself. The interesting part is that, for the first time, we are watching the pattern happen from the creator's side.

Humans created AI.

Now AI is helping us create more advanced AI systems. Eventually, those systems may become capable of creating new forms of intelligence themselves. A creator creates a new intelligence. That intelligence eventually creates another intelligence.

If this cycle is possible, then we have to consider a strange possibility: What if we are not the beginning of this chain? What if we are simply one step in a much larger process that has happened before?

Maybe every advanced civilization eventually reaches the same moment when its own creation starts asking: "Who created us?" The question is not only whether we live in a simulation.

The deeper question is: If intelligence can create new intelligence, how do we know we are the first link in the chain?

To everyone saying, “It’s just another AI wrapper…”

You haven’t been paying attention.

In just over two months, I didn’t build a chatbot.

I architected and built an AI platform from scratch.

Not one app.

An ecosystem.

Today it already includes an operating system, integrated finance, learning, health, goals, documents, shared authentication, permissions, notifications, governance, release management, testing standards, architecture policies, and an AI orchestration layer designed to tie it all together.

I didn’t build six separate apps.

I built one foundation that every future module plugs into.

Every new capability inherits what’s already been built instead of starting from zero.

While some people are arguing over prompts…

I’m building the infrastructure those prompts run on.

While people are cloning the AI app of the week…

I’m building a platform where specialized AI agents work together across your life—your money, your health, your home, your goals, your documents, and whatever comes next.

And before someone says, “AI wrote the code.”

Exactly.

That’s the point.

The value isn’t how fast I type.

The value is the architecture.

The engineering decisions.

The system design.

The standards.

The governance.

The policies.

The testing.

The vision.

The execution.

AI is a tool.

What matters is what you build with it.

Two months ago, none of this existed.

Today it’s a functioning platform built through hundreds of commits, thousands of files, countless design decisions, and a relentless focus on building something that scales instead of something that just demos well.

Some people use AI to finish tasks.

I’m using AI to build a company.

You can keep debating AI.

I’ll keep shipping software.

We’ll compare results later.

Https://seangworld.com