Darius Cosden 🧑🏻💻
@cosden.dev
Teaching React at @cosdensolutions · 170k subs · 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
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
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
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
How's the air quality where you live?
Here in Belgrade it's pretty bad right now. Can't really go out without a mask
I'm on a hill right now, but I can't see anything below
Here in Belgrade it's pretty bad right now. Can't really go out without a mask
I'm on a hill right now, but I can't see anything below
December 20, 2025 at 2:18 PM
How's the air quality where you live?
Here in Belgrade it's pretty bad right now. Can't really go out without a mask
I'm on a hill right now, but I can't see anything below
Here in Belgrade it's pretty bad right now. Can't really go out without a mask
I'm on a hill right now, but I can't see anything below
Hit $10k total revenue for Cosden Code today 🎉
Really proud of this but there's a lot of work ahead
Will slightly pivot early next year and things should go much better
Let's do this 🤙🏻
Really proud of this but there's a lot of work ahead
Will slightly pivot early next year and things should go much better
Let's do this 🤙🏻
December 18, 2025 at 4:00 PM
Hit $10k total revenue for Cosden Code today 🎉
Really proud of this but there's a lot of work ahead
Will slightly pivot early next year and things should go much better
Let's do this 🤙🏻
Really proud of this but there's a lot of work ahead
Will slightly pivot early next year and things should go much better
Let's do this 🤙🏻
2 weeks post launch MRR update
Things have slowed down quite a bit
Couple potential reasons: no free tier, upcoming holidays, didn't get enough good traffic, not enough content on platform
That's okay, it just means more work to figure this out
If boot dev can do it, so can I
Things have slowed down quite a bit
Couple potential reasons: no free tier, upcoming holidays, didn't get enough good traffic, not enough content on platform
That's okay, it just means more work to figure this out
If boot dev can do it, so can I
December 17, 2025 at 3:56 PM
2 weeks post launch MRR update
Things have slowed down quite a bit
Couple potential reasons: no free tier, upcoming holidays, didn't get enough good traffic, not enough content on platform
That's okay, it just means more work to figure this out
If boot dev can do it, so can I
Things have slowed down quite a bit
Couple potential reasons: no free tier, upcoming holidays, didn't get enough good traffic, not enough content on platform
That's okay, it just means more work to figure this out
If boot dev can do it, so can I
6. Have a lib folder for low-level utilities
The lib (library) folder is for anything shared that is not UI
So your database, your env, your 3rd party clients, etc
These don't need a UI to exist so they should go in their own separate folder (outside any features)
The lib (library) folder is for anything shared that is not UI
So your database, your env, your 3rd party clients, etc
These don't need a UI to exist so they should go in their own separate folder (outside any features)
December 17, 2025 at 11:03 AM
6. Have a lib folder for low-level utilities
The lib (library) folder is for anything shared that is not UI
So your database, your env, your 3rd party clients, etc
These don't need a UI to exist so they should go in their own separate folder (outside any features)
The lib (library) folder is for anything shared that is not UI
So your database, your env, your 3rd party clients, etc
These don't need a UI to exist so they should go in their own separate folder (outside any features)
5. Have a shared feature folder for UI
Any shared component, hook, type, server function, or whatever goes in features/shared
That folder is only for UI stuff and follows the same structure as all the other feature folders
Any shared component, hook, type, server function, or whatever goes in features/shared
That folder is only for UI stuff and follows the same structure as all the other feature folders
December 17, 2025 at 11:03 AM
5. Have a shared feature folder for UI
Any shared component, hook, type, server function, or whatever goes in features/shared
That folder is only for UI stuff and follows the same structure as all the other feature folders
Any shared component, hook, type, server function, or whatever goes in features/shared
That folder is only for UI stuff and follows the same structure as all the other feature folders
4. Fetch at the navigation layer
Don't fetch in client components unless you have to
Instead fetch in your loader (or server components if Next.js) and pass the data down (or through RQ)
This makes your components simple, render less, and more composable
Don't fetch in client components unless you have to
Instead fetch in your loader (or server components if Next.js) and pass the data down (or through RQ)
This makes your components simple, render less, and more composable
December 17, 2025 at 11:03 AM
4. Fetch at the navigation layer
Don't fetch in client components unless you have to
Instead fetch in your loader (or server components if Next.js) and pass the data down (or through RQ)
This makes your components simple, render less, and more composable
Don't fetch in client components unless you have to
Instead fetch in your loader (or server components if Next.js) and pass the data down (or through RQ)
This makes your components simple, render less, and more composable
3. Page components, feature components, and UI components
Your routes have one page component as the entry point
Each page component renders multiple feature components (TodoList, UserDashboard, FollowSuggestions, etc)
Feature components then use UI components
Your routes have one page component as the entry point
Each page component renders multiple feature components (TodoList, UserDashboard, FollowSuggestions, etc)
Feature components then use UI components
December 17, 2025 at 11:03 AM
3. Page components, feature components, and UI components
Your routes have one page component as the entry point
Each page component renders multiple feature components (TodoList, UserDashboard, FollowSuggestions, etc)
Feature components then use UI components
Your routes have one page component as the entry point
Each page component renders multiple feature components (TodoList, UserDashboard, FollowSuggestions, etc)
Feature components then use UI components
2. Follow the single responsibility principle
That means that everything only does one thing
Your components render 1 thing, your hooks do 1 thing, your utility function does 1 thing
The complexity comes from putting everything together not the individual parts
That means that everything only does one thing
Your components render 1 thing, your hooks do 1 thing, your utility function does 1 thing
The complexity comes from putting everything together not the individual parts
December 17, 2025 at 11:03 AM
2. Follow the single responsibility principle
That means that everything only does one thing
Your components render 1 thing, your hooks do 1 thing, your utility function does 1 thing
The complexity comes from putting everything together not the individual parts
That means that everything only does one thing
Your components render 1 thing, your hooks do 1 thing, your utility function does 1 thing
The complexity comes from putting everything together not the individual parts
1. Organize everything by features
All your entities (users, posts, comments, dashboard, etc) should have their own feature folder
Inside, you should have folders for "components", "hooks", "server", "client", etc
You will also need files for types, constants, utils, etc
All your entities (users, posts, comments, dashboard, etc) should have their own feature folder
Inside, you should have folders for "components", "hooks", "server", "client", etc
You will also need files for types, constants, utils, etc
December 17, 2025 at 11:03 AM
1. Organize everything by features
All your entities (users, posts, comments, dashboard, etc) should have their own feature folder
Inside, you should have folders for "components", "hooks", "server", "client", etc
You will also need files for types, constants, utils, etc
All your entities (users, posts, comments, dashboard, etc) should have their own feature folder
Inside, you should have folders for "components", "hooks", "server", "client", etc
You will also need files for types, constants, utils, etc
The worst thing that you can do for your React app is to structure your code and files the wrong way
This creates a weak foundation that collapses anytime you add anything to it
You're basically having legacy code from day 1
Here's how to fix that 👇🏻
This creates a weak foundation that collapses anytime you add anything to it
You're basically having legacy code from day 1
Here's how to fix that 👇🏻
December 17, 2025 at 11:03 AM
The worst thing that you can do for your React app is to structure your code and files the wrong way
This creates a weak foundation that collapses anytime you add anything to it
You're basically having legacy code from day 1
Here's how to fix that 👇🏻
This creates a weak foundation that collapses anytime you add anything to it
You're basically having legacy code from day 1
Here's how to fix that 👇🏻
Just added something that I think will really help conversions on Cosden Code
There's now over 250 users on the platform and growing daily
And just now I added a bundle for all yearly plans that gets you my 2 previous full-stack courses
Now is the best time to lock in and join
There's now over 250 users on the platform and growing daily
And just now I added a bundle for all yearly plans that gets you my 2 previous full-stack courses
Now is the best time to lock in and join
December 16, 2025 at 4:03 PM
Just added something that I think will really help conversions on Cosden Code
There's now over 250 users on the platform and growing daily
And just now I added a bundle for all yearly plans that gets you my 2 previous full-stack courses
Now is the best time to lock in and join
There's now over 250 users on the platform and growing daily
And just now I added a bundle for all yearly plans that gets you my 2 previous full-stack courses
Now is the best time to lock in and join
Google Announced their new browser "Disco"
How is no one talking about this?
It literally builds UIs and serves them to users
Where's the "web devs are cooked" posts?
How is no one talking about this?
It literally builds UIs and serves them to users
Where's the "web devs are cooked" posts?
December 15, 2025 at 10:56 AM
Google Announced their new browser "Disco"
How is no one talking about this?
It literally builds UIs and serves them to users
Where's the "web devs are cooked" posts?
How is no one talking about this?
It literally builds UIs and serves them to users
Where's the "web devs are cooked" posts?
The first person to finish all the launch content on Cosden Code 🤯
I was expecting this to take at least 2 months, not 2 weeks
Congrats dude, new course will drop in Jan
Until then, take a break and enjoy the holidays, well deserved
I was expecting this to take at least 2 months, not 2 weeks
Congrats dude, new course will drop in Jan
Until then, take a break and enjoy the holidays, well deserved
December 12, 2025 at 11:03 AM
The first person to finish all the launch content on Cosden Code 🤯
I was expecting this to take at least 2 months, not 2 weeks
Congrats dude, new course will drop in Jan
Until then, take a break and enjoy the holidays, well deserved
I was expecting this to take at least 2 months, not 2 weeks
Congrats dude, new course will drop in Jan
Until then, take a break and enjoy the holidays, well deserved
What's the best way to prefetch your data in Tanstack Start/Router?
The docs all show using "ensureQueryData" but that returns cached data even if it's been invalidated
I'm currently doing "fetchQuery" which accounts for invalidation but it doesn't feel right?
The docs all show using "ensureQueryData" but that returns cached data even if it's been invalidated
I'm currently doing "fetchQuery" which accounts for invalidation but it doesn't feel right?
December 11, 2025 at 11:02 AM
What's the best way to prefetch your data in Tanstack Start/Router?
The docs all show using "ensureQueryData" but that returns cached data even if it's been invalidated
I'm currently doing "fetchQuery" which accounts for invalidation but it doesn't feel right?
The docs all show using "ensureQueryData" but that returns cached data even if it's been invalidated
I'm currently doing "fetchQuery" which accounts for invalidation but it doesn't feel right?
My best performing video in a while
Apparently me moving away from Next.js was all it took
I guess I'll make more videos like this
Apparently me moving away from Next.js was all it took
I guess I'll make more videos like this
December 10, 2025 at 7:27 PM
My best performing video in a while
Apparently me moving away from Next.js was all it took
I guess I'll make more videos like this
Apparently me moving away from Next.js was all it took
I guess I'll make more videos like this
Vibe coding is creating a huge opportunity for those who know to code
Those who take this seriously right now will succeed
I built a complete roadmap on Cosden Code to teach you all the skills you need to be a successful full-stack React developer
Details below 👇
Those who take this seriously right now will succeed
I built a complete roadmap on Cosden Code to teach you all the skills you need to be a successful full-stack React developer
Details below 👇
December 10, 2025 at 11:03 AM
Vibe coding is creating a huge opportunity for those who know to code
Those who take this seriously right now will succeed
I built a complete roadmap on Cosden Code to teach you all the skills you need to be a successful full-stack React developer
Details below 👇
Those who take this seriously right now will succeed
I built a complete roadmap on Cosden Code to teach you all the skills you need to be a successful full-stack React developer
Details below 👇
My most viewed YT short (1.2m views) is me roasting my own code
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
December 9, 2025 at 11:04 AM
My most viewed YT short (1.2m views) is me roasting my own code
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
Currently not vibe coding in the north of Sweden 🧖🏻♂️
December 6, 2025 at 6:46 PM
Currently not vibe coding in the north of Sweden 🧖🏻♂️
I believe I may have had my first word of mouth sale
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
December 5, 2025 at 4:00 PM
I believe I may have had my first word of mouth sale
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
Latest YT video did alright
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
December 5, 2025 at 11:02 AM
Latest YT video did alright
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
Most views are existing subscribers
Which is great, but I want to reach more new viewers too