Code With Antonio

My Education Platform: YouTube (400k+):

[Code With Antonio @codewithantonio]

I spent the last few months building my own Claude Code from scratch 🤖

Today, I’m open-sourcing the entire project in a completely free 12-hour tutorial

⚛️ React-powered terminal UI with OpenTUI
⚡ Stream AI responses directly in the terminal
🛠️ Build your own tool calling system
📁 Read, write, and edit project files
🧠 Create custom agent modes & permissions
🔍 Search and understand entire codebases
🔐 Browser-to-CLI authentication with @clerk
💳 Usage billing with @polar_sh
🤖 AI code reviews with @coderabbitai
🚀 Deployments with @Railway
🗃️ Database with @neondatabase
📈 Monitoring with @sentry

[Code With Antonio @codewithantonio]

@theo Hater debugging is crazy work 😭

[Code With Antonio @codewithantonio]

a fun fact i've observed with projects i've built using agentic coding:

they all naturally drift toward feature architecture and monorepos

not because the agent recommends it, but because i end up restructuring the codebase to make it more "agent compatible"

agents seem to perform best when changes have a small blast radius (feature architecture) and clear boundaries (monorepos)

i wouldn't be surprised if this becomes a broader trend in software architecture as agentic coding becomes more common

[Code With Antonio @codewithantonio]

in love with hacker news error message

[Code With Antonio @codewithantonio]

@jlongster @kitlangton FINALLY!!!

[Code With Antonio @codewithantonio]

@thomasjiangcy @PlanetScale I can also authenticate via PlanetScale CLI and do the same thing!

[Code With Antonio @codewithantonio]

What's something an MCP server can do that Skill + CLI cannot do?

[Code With Antonio @codewithantonio]

@andrelandgraf great answer

[Code With Antonio @codewithantonio]

@devagrawal09 thats a good one

[Code With Antonio @codewithantonio]

@manupadev Finally, a technical limitation mentioned!

[Code With Antonio @codewithantonio]

@iamsahaj_xyz very good direction, i recently played around with hunk diff, and those were the exact problems i encountered

good diff viewer and agent notes, but hard to get context without entire file explorer and half the file collapsed

[Code With Antonio @codewithantonio]

@jherr "Hey Antonio, I love your [Insert latest video topic].

Here is how I can 100x your channel:
[Insert list of services you do not need]"

[Code With Antonio @codewithantonio]

@esoterikv Firecrawl MCP vs Firecrawl CLI + Skill

I am struggling to understand what makes you think CLIs cannot call external APIs?

[Code With Antonio @codewithantonio]

@esoterikv what do you think happens when you do `gh login` or `stripe login` ?

[Code With Antonio @codewithantonio]

for the user, there are very few benefits of MCP over Skill + CLI, and most of them are regarding UX

for the product, MCPs still have massive wins:
- Integrate with ChatGPT, Claude on the web
- Integrate with Mobile apps
- Basically any place where CLIs cannot run

[Code With Antonio @codewithantonio]

What's something an MCP server can do that Skill + CLI cannot do?

[Code With Antonio @codewithantonio]

@wesbos there is almost nothing MCPs are better at than Skills + CLI... i think?

https://t.co/xcRxnOc4Ex

[Code With Antonio @codewithantonio]

What's something an MCP server can do that Skill + CLI cannot do?

[Code With Antonio @codewithantonio]

@decruz These are the answers I am looking for, I am not trying to argue, I am genuinely looking for things that MCPs can do that Skills + CLI cannot!

Would you say this is a technical limitation of Skills + CLI that MCPs give you, or is it more of a DX / UX benefit on the MCP side?

[Code With Antonio @codewithantonio]

@decruz Yes, but that has nothing to do with MCP vs CLI + Skills

Just as you can develop your own MCP that connects to your logs or database couldn't you do the same with creating your CLI + Skills?

Or is the "without exposing direct connection" something I am missing here?

[Code With Antonio @codewithantonio]

@Prathamesh_7717 in what way?

[Code With Antonio @codewithantonio]

@decruz $ stripe login => Logins to Stripe
$ gh auth => Logins to GitHub

Both of these can have a SKILL.md which instructs the agent to perform that command for auth

[Code With Antonio @codewithantonio]

cc @kentcdodds feel like you might know more about this

[Code With Antonio @codewithantonio]

@sebastiankehle_ Hmm, wouldn't Skill + CLI be able to do the same if the harness decides to invoke the skill in the middle of the task?