I've just started a new role as a senior SWE after 5 months off. I've been using Claude a bit in my time off; it works really well. But now that I've started using it professionally, I keep running into a specific problem: I have nothing to hold onto in my own mind.

How this plays out:

I use Claude to write some moderately complex code and raise a PR. Someone asks me to change something. I look at the review and think, yeah, that makes sense, I missed that and Claude missed that. The code works, but it's not quite right. I'll make some changes.

Except I can't.

For me, it turns out having decisions made for you and fed to you is not the same as making the decisions and moving the code from your brain to your hands yourself. Certainly every decision made was fine: I reviewed Claude's output, got it to ask questions, answered them, and it got everything right. I reviewed its code before I raised the PR. Everything looked fine within the bounds of my knowledge, and this review was simply something I didn't know about.

But I didn't make any of those decisions. And when I have to come back to the code to make updates - perhaps tomorrow - I have nothing to grab onto in my mind. Nothing is in my own mental cache. I know what decisions were made, but I merely checked them, I didn't decide them. I know where the code was written, but I merely verified it, I didn't write it.

And so I suffer an immediate and extreme slow-down, basically re-doing all of Claude's work in my mind to reach a point where I can make manual changes correctly.

But wait, I could just use Claude for this! But for now I don't, because I've seen this before. Just a few moments ago. Using Claude has just made it significantly slower when I need to use my own knowledge and skills.

I'm still figuring out whether this problem is transient (because this is a brand new system that I don't have years of experience with), or whether it will actually be a hard blocker to me using Claude long-term. Assuming I want to be at my new workplace for many years and be successful, it will cost me a lot in time and knowledge to NOT build the castle in the sky myself.

Then you're using it more towards vibe coding than AI-assisted coding: I use AI to write the stuff the way I want it to be written. I give it information about how to structure files, coding style and the logic flow.

Then I spend time to read each file change and give feedback on things I'd do differently. Vastly saves me time and it's very close or even better than what I would have written.

If the result is something you can't explain than slow down and follow the steps it takes as they are taken.

For me it seems more or less similar to reviewing others' changes to a codebase. In any large organization codebase, most of the changes won't be our own.

This is my primary personal concern. I think it could be an silent psychological landmine going off way too late (sic).

In a living codebase you spent long stretches to learn how it works. It's like reading a book that doesn't match your taste, but you eventually need to understand and edit it, so you push through. That process is extremely valuable, you will get familiar with the codebase, you map it out in your head, you imagine big red alerts on the problematic stuff. Over time you become more and more efficient editing and refactoring the code.

The short term state of AI is pretty much outlined by you. You get a high level bug or task, you rephrase it into proper technical instructions and let a coding agent fill in the code. Yell a few times. Fix problems by hand.

But you are already "detached" from the codebase, you have to learn it the hard way. Each time your agent is too stupid. You are less efficient, at least in this phase. But your overall understanding of the codebase will degrade over time. Once the serious data corruption hits the company, it will take weeks to figure it out.

I think this psychological detachment can potentially play out really bad for the whole industry. If we get stuck for too long in this weird phase, the whole tech talent pool might implode. (Is anyone working on plumbing LLMs?)

Ask Claude to explain the code in depth for you. It's a language model, it's great at taking in obscure code and writing up explanations of how it works in plain English.

You can do this during the previous change phase of course. Just ask "How would one plan this change to the codebase? Could you explain in depth why?" If you're expected to be thoroughly familiar with that code, it makes no sense to skip that step.