Just want to clarify, this is not my Substack, I’m just sharing this because I found it insightful.
The author describes himself as a “fractional CTO”(no clue what that means, don’t ask me) and advisor. His clients asked him how they could leverage AI. He decided to experience it for himself. From the author(emphasis mine):
I forced myself to use Claude Code exclusively to build a product. Three months. Not a single line of code written by me. I wanted to experience what my clients were considering—100% AI adoption. I needed to know firsthand why that 95% failure rate exists.
I got the product launched. It worked. I was proud of what I’d created. Then came the moment that validated every concern in that MIT study: I needed to make a small change and realized I wasn’t confident I could do it. My own product, built under my direction, and I’d lost confidence in my ability to modify it.
Now when clients ask me about AI adoption, I can tell them exactly what 100% looks like: it looks like failure. Not immediate failure—that’s the trap. Initial metrics look great. You ship faster. You feel productive. Then three months later, you realize nobody actually understands what you’ve built.
The longer the project the more stupid Claude gets. I’ve seen it both in chat, and in Claude code, and Claude explains the situation quite well:
Increased cognitive load: Longer projects have more state to track - more files, more interconnected components, more conventions established earlier. Each decision I make needs to consider all of this, and the probability of overlooking something increases with complexity.
Git specifically: For git operations, the problem is even worse because git state is highly sequential - each operation depends on the exact current state of the repository. If I lose track of what branch we’re on, what’s been committed, or what files exist, I’ll give incorrect commands.
Anything I do with Claude. I will split into different chats, I won’t give it access to git but I will provide it an updated repository via Repomix. I get much better results because of that.