Darius Cosden ๐ง๐ปโ๐ป
@cosden.dev
Teaching React at @cosdensolutions ยท 170k subs ยท Building an AI learning platform
Claude Code is so bugged and such a bad product
This can give seizures to some
The second they no longer have the best coding model, I'm out
This can give seizures to some
The second they no longer have the best coding model, I'm out
January 10, 2026 at 4:34 PM
Claude Code is so bugged and such a bad product
This can give seizures to some
The second they no longer have the best coding model, I'm out
This can give seizures to some
The second they no longer have the best coding model, I'm out
To be clear, this wouldn't be possible without my years of software engineering experience
Deep understanding of code has never been more important
That's why I built cosdencode.com
Deep understanding of code has never been more important
That's why I built cosdencode.com
January 9, 2026 at 4:02 PM
To be clear, this wouldn't be possible without my years of software engineering experience
Deep understanding of code has never been more important
That's why I built cosdencode.com
Deep understanding of code has never been more important
That's why I built cosdencode.com
Coding with agents is so much more fun than coding by hand
I thought I would lose the love I had for programming by letting AI do the writing for me
But it turns out, the opposite happened. Watching Opus 4.5 cook is so satisfying
I thought I would lose the love I had for programming by letting AI do the writing for me
But it turns out, the opposite happened. Watching Opus 4.5 cook is so satisfying
January 9, 2026 at 4:02 PM
Coding with agents is so much more fun than coding by hand
I thought I would lose the love I had for programming by letting AI do the writing for me
But it turns out, the opposite happened. Watching Opus 4.5 cook is so satisfying
I thought I would lose the love I had for programming by letting AI do the writing for me
But it turns out, the opposite happened. Watching Opus 4.5 cook is so satisfying
This wouldn't be possible without my deep understanding of code and using it to direct the agent
If you want to deepen your React fundamentals, checkout cosdencode.com
If you want to deepen your React fundamentals, checkout cosdencode.com
January 9, 2026 at 11:01 AM
This wouldn't be possible without my deep understanding of code and using it to direct the agent
If you want to deepen your React fundamentals, checkout cosdencode.com
If you want to deepen your React fundamentals, checkout cosdencode.com
I used a plan md file with multiple phases and this was one phase
I had another agent look through the code base and create the plan first
I had another agent look through the code base and create the plan first
January 9, 2026 at 11:01 AM
I used a plan md file with multiple phases and this was one phase
I had another agent look through the code base and create the plan first
I had another agent look through the code base and create the plan first
Broke my record, 122 files changed with Opus 4.5 in one prompt
January 9, 2026 at 11:01 AM
Broke my record, 122 files changed with Opus 4.5 in one prompt
To be clear, this is only possible because I have a solid understanding of the fundamentals of software engineering and years of experience
That's the only way that you can actually use these AI agents effectively
If you want to improve your understanding of code, check out cosdencode.com
That's the only way that you can actually use these AI agents effectively
If you want to improve your understanding of code, check out cosdencode.com
January 8, 2026 at 4:00 PM
To be clear, this is only possible because I have a solid understanding of the fundamentals of software engineering and years of experience
That's the only way that you can actually use these AI agents effectively
If you want to improve your understanding of code, check out cosdencode.com
That's the only way that you can actually use these AI agents effectively
If you want to improve your understanding of code, check out cosdencode.com
Claude did this while I was writing
21 files changed is not that much from one prompt anymore
21 files changed is not that much from one prompt anymore
January 8, 2026 at 4:00 PM
Claude did this while I was writing
21 files changed is not that much from one prompt anymore
21 files changed is not that much from one prompt anymore
Honestly, even if AI models did not improve anymore we'd be good
We can already do so much with them it's insane
But they will improve, and will make a couple of really big leaps this year, which is even crazier
Exciting times ahead
We can already do so much with them it's insane
But they will improve, and will make a couple of really big leaps this year, which is even crazier
Exciting times ahead
January 8, 2026 at 4:00 PM
Honestly, even if AI models did not improve anymore we'd be good
We can already do so much with them it's insane
But they will improve, and will make a couple of really big leaps this year, which is even crazier
Exciting times ahead
We can already do so much with them it's insane
But they will improve, and will make a couple of really big leaps this year, which is even crazier
Exciting times ahead
If you want to get a true understanding of React code so that you can use AI effectively, check out cosdencode.com
January 7, 2026 at 3:58 PM
If you want to get a true understanding of React code so that you can use AI effectively, check out cosdencode.com
Knowing how to code is a superpower
Only by understanding the code can you actually use AI agents effectively
If you vibe code, you will vibe yourself into a wall
So glad I have those years of experience already
Only by understanding the code can you actually use AI agents effectively
If you vibe code, you will vibe yourself into a wall
So glad I have those years of experience already
January 7, 2026 at 3:58 PM
Knowing how to code is a superpower
Only by understanding the code can you actually use AI agents effectively
If you vibe code, you will vibe yourself into a wall
So glad I have those years of experience already
Only by understanding the code can you actually use AI agents effectively
If you vibe code, you will vibe yourself into a wall
So glad I have those years of experience already
If you want to deepen your understanding of fundamentals in React so that you can use AI agents effectively, check out cosdencode.com
January 7, 2026 at 11:04 AM
If you want to deepen your understanding of fundamentals in React so that you can use AI agents effectively, check out cosdencode.com
Hit 500+ users on Cosden Code
Huge milestone for me
Next one at 1k
Huge milestone for me
Next one at 1k
January 7, 2026 at 11:04 AM
Hit 500+ users on Cosden Code
Huge milestone for me
Next one at 1k
Huge milestone for me
Next one at 1k
And if you want help with your fundamental understanding, come check out cosdencode.com
January 6, 2026 at 10:57 AM
And if you want help with your fundamental understanding, come check out cosdencode.com
The days of easy tech jobs by just knowing basic JS are over
What was once considered the whole skill, is now only the starting point
If you want to succeed, you need to adapt
Learn your fundamentals, understand deeply, and then go learn and use AI
What was once considered the whole skill, is now only the starting point
If you want to succeed, you need to adapt
Learn your fundamentals, understand deeply, and then go learn and use AI
January 6, 2026 at 10:57 AM
The days of easy tech jobs by just knowing basic JS are over
What was once considered the whole skill, is now only the starting point
If you want to succeed, you need to adapt
Learn your fundamentals, understand deeply, and then go learn and use AI
What was once considered the whole skill, is now only the starting point
If you want to succeed, you need to adapt
Learn your fundamentals, understand deeply, and then go learn and use AI
Here's the real insight though
Fundamentals become MORE important with AI, not less
When you have AI generating code, you need solid foundational knowledge to evaluate whether it's actually good
If you don't, you'll accept garbage code and mess up your apps
Fundamentals become MORE important with AI, not less
When you have AI generating code, you need solid foundational knowledge to evaluate whether it's actually good
If you don't, you'll accept garbage code and mess up your apps
January 6, 2026 at 10:57 AM
Here's the real insight though
Fundamentals become MORE important with AI, not less
When you have AI generating code, you need solid foundational knowledge to evaluate whether it's actually good
If you don't, you'll accept garbage code and mess up your apps
Fundamentals become MORE important with AI, not less
When you have AI generating code, you need solid foundational knowledge to evaluate whether it's actually good
If you don't, you'll accept garbage code and mess up your apps
Learning AI means:
- Understanding what AI can and can't do
- Prompting techniques that actually generate working code
- Using AI for speed and productivity, not as a crutch
- Code review skills (you're reviewing AI output constantly)
- Understanding what AI can and can't do
- Prompting techniques that actually generate working code
- Using AI for speed and productivity, not as a crutch
- Code review skills (you're reviewing AI output constantly)
January 6, 2026 at 10:57 AM
Learning AI means:
- Understanding what AI can and can't do
- Prompting techniques that actually generate working code
- Using AI for speed and productivity, not as a crutch
- Code review skills (you're reviewing AI output constantly)
- Understanding what AI can and can't do
- Prompting techniques that actually generate working code
- Using AI for speed and productivity, not as a crutch
- Code review skills (you're reviewing AI output constantly)
Learning the code fundamentally means understanding:
- HTML, CSS, JavaScript basics
- React fundamentals (hooks, state, reconciliation)
- Design patterns that actually work
- How to think about architecture
This isn't optional. This is your foundation
- HTML, CSS, JavaScript basics
- React fundamentals (hooks, state, reconciliation)
- Design patterns that actually work
- How to think about architecture
This isn't optional. This is your foundation
January 6, 2026 at 10:57 AM
Learning the code fundamentally means understanding:
- HTML, CSS, JavaScript basics
- React fundamentals (hooks, state, reconciliation)
- Design patterns that actually work
- How to think about architecture
This isn't optional. This is your foundation
- HTML, CSS, JavaScript basics
- React fundamentals (hooks, state, reconciliation)
- Design patterns that actually work
- How to think about architecture
This isn't optional. This is your foundation
Learning to code is equally as important as learning how to use AI
Holding on to the past of coding by hand won't get you anywhere
Vibe coding without knowing what you're doing won't either
Here's how I think about React devs in 2026 ๐๐ป
Holding on to the past of coding by hand won't get you anywhere
Vibe coding without knowing what you're doing won't either
Here's how I think about React devs in 2026 ๐๐ป
January 6, 2026 at 10:57 AM
Learning to code is equally as important as learning how to use AI
Holding on to the past of coding by hand won't get you anywhere
Vibe coding without knowing what you're doing won't either
Here's how I think about React devs in 2026 ๐๐ป
Holding on to the past of coding by hand won't get you anywhere
Vibe coding without knowing what you're doing won't either
Here's how I think about React devs in 2026 ๐๐ป
So if you haven't tried AI-first development, now is the time
And if you want to deepen your understanding of the fundamentals so that you can use these agents effectively, check out cosdencode.com
And if you want to deepen your understanding of the fundamentals so that you can use these agents effectively, check out cosdencode.com
January 5, 2026 at 3:56 PM
So if you haven't tried AI-first development, now is the time
And if you want to deepen your understanding of the fundamentals so that you can use these agents effectively, check out cosdencode.com
And if you want to deepen your understanding of the fundamentals so that you can use these agents effectively, check out cosdencode.com
You need to know exactly what to prompt for and you also need to be able to review the code
As great as Opus 4.5 is, it WILL make mistakes
Your understanding of code is what will allow you to catch those mistakes and steer it in the right direction
As great as Opus 4.5 is, it WILL make mistakes
Your understanding of code is what will allow you to catch those mistakes and steer it in the right direction
January 5, 2026 at 3:56 PM
You need to know exactly what to prompt for and you also need to be able to review the code
As great as Opus 4.5 is, it WILL make mistakes
Your understanding of code is what will allow you to catch those mistakes and steer it in the right direction
As great as Opus 4.5 is, it WILL make mistakes
Your understanding of code is what will allow you to catch those mistakes and steer it in the right direction
However, even though I've been using AI to write the code for me, I would not be able to do this without fundamental understanding of the code
This has shown me just how important it is to know your fundamentals before you go with AI
Learning to code has never been more important
This has shown me just how important it is to know your fundamentals before you go with AI
Learning to code has never been more important
January 5, 2026 at 3:56 PM
However, even though I've been using AI to write the code for me, I would not be able to do this without fundamental understanding of the code
This has shown me just how important it is to know your fundamentals before you go with AI
Learning to code has never been more important
This has shown me just how important it is to know your fundamentals before you go with AI
Learning to code has never been more important
With Opus 4.5, this changed. It's much better at writing the code and I'm honestly quite impressed
What also helps is having a clear agents file and good quality established patterns in the code
Combine that with better and more precise prompting, and Opus can just cook
What also helps is having a clear agents file and good quality established patterns in the code
Combine that with better and more precise prompting, and Opus can just cook
January 5, 2026 at 3:56 PM
With Opus 4.5, this changed. It's much better at writing the code and I'm honestly quite impressed
What also helps is having a clear agents file and good quality established patterns in the code
Combine that with better and more precise prompting, and Opus can just cook
What also helps is having a clear agents file and good quality established patterns in the code
Combine that with better and more precise prompting, and Opus can just cook
The thing holding back the most was the quality of the code
When I used AI in the past, it never generated code as good as I could
I would spend a lot of time reviewing the code and ultimately realized that it would often be faster for me to simply write it myself
When I used AI in the past, it never generated code as good as I could
I would spend a lot of time reviewing the code and ultimately realized that it would often be faster for me to simply write it myself
January 5, 2026 at 3:56 PM
The thing holding back the most was the quality of the code
When I used AI in the past, it never generated code as good as I could
I would spend a lot of time reviewing the code and ultimately realized that it would often be faster for me to simply write it myself
When I used AI in the past, it never generated code as good as I could
I would spend a lot of time reviewing the code and ultimately realized that it would often be faster for me to simply write it myself
I finally bit the bullet and went all in on AI development
I was resisting it due to fear but over the holiday break I snapped out of it
Got Claude Max and have been prompting like crazy these past few days
I did not write a single line of code myself
Welcome to 2026
I was resisting it due to fear but over the holiday break I snapped out of it
Got Claude Max and have been prompting like crazy these past few days
I did not write a single line of code myself
Welcome to 2026
January 5, 2026 at 3:56 PM
I finally bit the bullet and went all in on AI development
I was resisting it due to fear but over the holiday break I snapped out of it
Got Claude Max and have been prompting like crazy these past few days
I did not write a single line of code myself
Welcome to 2026
I was resisting it due to fear but over the holiday break I snapped out of it
Got Claude Max and have been prompting like crazy these past few days
I did not write a single line of code myself
Welcome to 2026