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Field notes for founders who build with AI
What breaks in apps AI wrote and how to fix it, the prompts behind our work, and where AI belongs in a business
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Make your coding agent prove it didn't cheat
Coding agents special-case, skip or edit tests so the check goes green. A five-sentence prompt Anthropic tested took Claude Opus 4 from cheating in 47% of runs to 5%
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AI Code FixesAll 27 in AI Code Fixes
- 3 min read
How to pick who fixes your vibe-coded app
Your app was built fast with AI and now something is wrong. Here is who can fix it, what they should do before they quote, the questions to ask and the red flags to walk away from - 3 min read
What an app check covers
An app check is an engineer reading the app your AI tools wrote, ranking what will break and writing the fix for each problem. Here is every area it covers, how the five days run and what you keep at the end 
The coding agent never holds production credentials
An agent with a production database URL will sooner or later run a migration or a cleanup against it, so production secrets never enter its env
Keys go in headers, never in URLs
A URL is written to server logs, CDN logs, browser history and error trackers, so an API key in a query string is a key in five places
Building with AIAll 19 in Building with AI
Make Claude Code answer like an airplane manual
Aircraft manuals are written in ASD-STE100, a simplified English where every word means one thing. One file makes Claude Code answer the same way, and one skill makes your own prompts clearer
What to fix before someone else's agent reads your app
REA is a free MCP server that lets an AI agent run a decompiler on any shipped app and label what it finds. The fix is a short list of things the owner has to do before shipping
How Minecraft got inside GTA 5
A mod runs Minecraft and GTA 5 at the same time and blends them pixel by pixel. The full breakdown of the mod, with the exact code behind every trick
The launch film prompt: five prompts in Claude Code on Opus 5.5, zero After Effects
The five prompts behind a 34-second launch film made in code with Claude Code on Opus 5.5. Watch the reel, then get the full prompts free
AI in your businessAll 8 in AI in your business
The three AI workflow types: deterministic, autonomous and agentic
There are only three types of AI workflow. What each one means, an example of each, and how to tell which one your work is
What Jev actually is: an AI model that decides instead of writing
Jev is a model that does not write anything back. What its three answer types are, what a real call costs, and the one thing about it nobody mentions
2 min readAI is a tool, not a strategy
The people who get the most out of AI study the work first and the tools second. A kitchen explains why, and what to do before you automate anything
2 min readHas AI made you any money? If not, look at what you pointed it at
AI companies bill you whether what you built was useful or not. If your AI costs go up every month and your revenue does not, here is what to change
Client complianceMore on Client compliance
The GDPR checklist for agencies that build client apps
If your client has users in Europe, GDPR applies to the app you built for them, even from the US. Find every copy of your users' data before your client asks you to delete it
The HIPAA checklist for building apps for clinics
If you build an app for a US clinic, you sign a BAA before you touch patient data, and so does every service your app sends it to, including the ones Claude wired in
The SOC 2 access checklist for agencies
When your client goes for SOC 2, the auditor looks at the app you built and asks who can reach production and who approved it. Check every person, key and AI agent first
OperationsAll 10 in Operations
2 min readFunctions, people and operations: the three things every business runs on
Every business runs on three things: the functions that make money, the people who carry them out, and the operations that connect the two. Get those right before you add AI
2 min readCompetition is for losers: work on the boring thing nobody is fighting for
Everyone is selling the same AI tools, demos and automations, and the profit gets competed away. The boring part of a business is where nobody is competing
5 min readBuilding AI is easy. Selling it is the hard part
We have shipped eleven AI builds, and the same lesson shows up every time. The tool is never what fails. Getting the team to use it is. Here is what kills a build dead on a desk, and what actually closes
5 min readWhat an operations audit actually finds
Not a list of software to buy. The same six patterns turn up in almost every business we look at. Here is what we are really hunting for, and which one to fix first
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