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CJ

@w3cj.com
4K followers 1.6K following 205 posts

Full Stack Dev, Explainer of Things Senior Creator at @syntax.fm / @sentry.io Host of coding.garden on Twitch and YouTube

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Reposted by CJ
Syntax @syntax.fm · 28/09/2026
The Syntax crew is LIVE to chat how Ruby on Rails is Dead, Zuck cooked with Muse, upm the tiny npm replacement and more! See you in the chat. www.youtube.com/watch?v=Z412... www.twitch.tv/syntaxfm
youtube.com
Ruby on Rails is Dead ⟡ Zuck cooked with Muse ⟡ upm is a tiny npm replacement ⌁ Syntax Weekly ⌁
YouTube video by Syntax
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Reposted by CJ
Syntax @syntax.fm · 21/09/2026
The Syntax crew is LIVE to chat about Jev! Is the Hype Overblown? Also Claude shipped AGENTS md support, TinyCast is a smaller Raycast and more! See you in the chat. youtube.com/watch?v=rsp5... twitch.tv/syntaxfm
youtube.com
Is the Jev Hype Overblown? ⟡ Claude AGENTS.md support ⟡ TinyCast smaller Raycast ⌁ Syntax Weekly ⌁
YouTube video by Syntax
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CJ @w3cj.com · 18/09/2026
Code for jev chat is available here: github.com/w3cj/jev-chat The README includes a breakdown of how this all works and includes an FAQ.
github.com
GitHub - w3cj/jev-chat: A tool calling chat bot built with Jev and no LLM.
A tool calling chat bot built with Jev and no LLM. - w3cj/jev-chat
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CJ @w3cj.com · 17/09/2026
I'll share it soon. But basically its a "choice" prompt for jev where the question is: "Which sentence from the article directly answers the question? Pick the one containing the specific fact asked for." And the choices provided are every sentence from the article.
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CJ @w3cj.com · 17/09/2026
Jev is an extremely cheap and fast classifier that can replace long LLM prompts in your workflows with more deterministic answers and actions. I break down what that means, how it works and show several demos of Jev in action in my latest video. www.youtube.com/watch?v=QbYB...
youtube.com
wtf is jev?
YouTube video by Syntax
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CJ @w3cj.com · 28/08/2026
We're at a point where coding without an isolation mechanism or sandbox is way too risky. Use containers at a minimum, VMs if you have enough resources or a remote machine with either of these if you can. Watch 🍿: www.youtube.com/watch?v=-ulR...
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CJ @w3cj.com · 14/08/2026
A must watch for anyone using AI to code.
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Reposted by CJ
Syntax @syntax.fm · 10/08/2026
We're LIVE to chat about how an AI assistant hacked a gym, a $9k cloudflare bill, a new unlimited use AI sub service and more! See you in the chat. www.youtube.com/watch?v=HrNL... twitch.tv/syntaxfm
youtube.com
AI Assistant Hacks Gym ⟡ $9k Cloudflare Bill ⟡ Unlimited Use AI Subs ⌁ Syntax Weekly ⌁
YouTube video by Syntax
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Reposted by CJ
Syntax @syntax.fm · 04/08/2026
The Syntax crew is LIVE to chat about the new cloudflare wallets, a NEW react compiler, an active npm supply chain attack and more! See you in the chat! www.youtube.com/watch?v=KNF4...
youtube.com
Cloudflare Wallets ⟡ A REAL React Compiler Released ⌁ Syntax Weekly ⌁
YouTube video by Syntax
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Reposted by CJ
Scott Tolinski @tolin.ski · 31/07/2026
I’m exploring the mental health effects of AI coding. This is a super quick (blazing fast), anonymous survey. Please fill out and share so that the responses will be well rounded. forms.gle/dpD8Tk1QnXAz...
forms.gle
AI Coding & Mental Health
All answers are anonymous.
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CJ @w3cj.com · 31/07/2026
There are a lot of questions and misconceptions about open weight models. I break it all down here so even nontechnical folks can understand. www.youtube.com/watch?v=a-Lj...
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Open Weight AI Models Explained for Everyone
YouTube video by Syntax
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CJ @w3cj.com · 28/07/2026
Watch 🍿 www.youtube.com/watch?v=YmLp...
youtube.com
I Built an LLM From Scratch
YouTube video by Syntax
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CJ @w3cj.com · 28/07/2026
LLM tool calls explained, excerpt from my video "I Built an LLM From Scratch"
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Reposted by CJ
Syntax @syntax.fm · 27/07/2026
We're LIVE to chat about the Hugging Face Hack, the React compiler was ported to Rust, there's a new Rust based full stack framework called topcoat and more! See you in the chat. youtube.com/watch?v=A_Mr... www.twitch.tv/syntaxfm/
youtube.com
OpenAI Agent Hacks Hugging Face ⟡ React Compiler Ported to Rust ⟡ Rust Full Stack ⌁ Syntax Weekly
YouTube video by Syntax
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CJ @w3cj.com · 24/07/2026
Watch 🍿 www.youtube.com/watch?v=YmLp...
youtube.com
I Built an LLM From Scratch
YouTube video by Syntax
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CJ @w3cj.com · 24/07/2026
The full pipeline of LLMs explained, excerpt from my video "I Built an LLM From Scratch"
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CJ @w3cj.com · 17/07/2026
Watch 🍿 www.youtube.com/watch?v=YmLp...
youtube.com
I Built an LLM From Scratch
YouTube video by Syntax
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CJ @w3cj.com · 17/07/2026
The output of a transformer (LLM) is a score (logit) for every possible next token. We then use temperature, softmax, top-p and sampling to choose the next token, excerpt from my video "I Built an LLM From Scratch"
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CJ @w3cj.com · 16/07/2026
Watch 🍿 www.youtube.com/watch?v=YmLp...
youtube.com
I Built an LLM From Scratch
YouTube video by Syntax
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CJ @w3cj.com · 16/07/2026
The transformer architecture that powers modern LLMs explained, excerpt from my video "I Built an LLM From Scratch"
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CJ @w3cj.com · 16/07/2026
AI is stealing from you. www.youtube.com/watch?v=mudi...
youtube.com
AI Is Stealing From You
YouTube video by Syntax
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CJ @w3cj.com · 15/07/2026
Token embeddings explained, excerpt from my video "I Built an LLM From Scratch"
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CJ @w3cj.com · 14/07/2026
Tokenization explained, excerpt from my video "I Built an LLM From Scratch"
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CJ @w3cj.com · 13/07/2026
Watch the full video 🍿 www.youtube.com/watch?v=YmLp...
youtube.com
I Built an LLM From Scratch
YouTube video by Syntax
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CJ @w3cj.com · 13/07/2026
A brief history of neural networks, excerpt from my video "I Built an LLM From Scratch"
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CJ @w3cj.com · 10/07/2026
Watch 🍿 www.youtube.com/watch?v=YmLp...
youtube.com
How Does ChatGPT Work?
YouTube video by Syntax
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CJ @w3cj.com · 10/07/2026
I built an LLM from scratch. Here's everything I learned along the way.
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Reposted by CJ
Syntax @syntax.fm · 06/07/2026
Do you still read the code? We're live to chat about it as well as a NEW HTTP Method, Codex Sol Ultra and much more. See you in the chat. www.youtube.com/watch?v=6F0J... www.twitch.tv/syntaxfm/
youtube.com
Do You Read The Code? ⟡ HTTP Gets a NEW Method ⟡ Codex Gets Sol Ultra ⌁ Syntax Weekly ⌁
YouTube video by Syntax
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Reposted by CJ
Syntax @syntax.fm · 26/06/2026
The definitive web tech tier list. www.youtube.com/watch?v=-S_Y...
youtube.com
You're gonna hate this tier list.
YouTube video by Syntax
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CJ @w3cj.com · 24/06/2026
redaxios is a tiny wrapper but I've had issues with the typescript types: github.com/developit/re... Now I use ofetch for everything: github.com/unjs/ofetch
github.com
GitHub - unjs/ofetch: 😱 A better fetch API. Works everywhere.
😱 A better fetch API. Works everywhere. Contribute to unjs/ofetch development by creating an account on GitHub.
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Reposted by CJ
Syntax @syntax.fm · 28/05/2026
We're LIVE to chat about Opus 4.8, Herdr (a better tmux), how AI is killing the small web and more! See you in the chat! www.youtube.com/watch?v=tePe... www.twitch.tv/syntaxfm/
youtube.com
Opus 4.8! ⟡ Goodbye tmux, Hello Herdr ⟡ AI Killing the Small Web ⌁ Syntax Weekly ⌁
YouTube video by Syntax
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Reposted by CJ
Syntax @syntax.fm · 02/04/2026
🏆🏆🏆STARTING NOW🏆🏆🏆 www.youtube.com/watch?v=7rOU...
youtube.com
One Last Battle
YouTube video by Syntax
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Reposted by CJ
Syntax @syntax.fm · 27/03/2026
STARTING IN 30 MINUTES @tolin.ski vs Kyle @joshwcomeau.com vs @wesbos.com www.youtube.com/watch?v=RNp1...
youtube.com
16 Pro Web Devs Compete with CSS | Round 4 | Semi Finals
We brought 16 of the worlds best CSS developers to compete head to head. https://www.madcss.com Play it here: synhax.syntax.fm Follow / subscribe to all of our featured competitors: Josh…
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Reposted by CJ
Syntax @syntax.fm · 26/03/2026
AI coding still sucks but @w3cj.com is getting value out of it in other ways. www.youtube.com/watch?v=AMnQ...
youtube.com
AI Coding Still Sucks (without validation)
YouTube video by Syntax
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Reposted by CJ
Syntax @syntax.fm · 20/03/2026
Starting in 15 minutes ‼️🧑‍💻🏀 www.youtube.com/watch?v=YZZb...
youtube.com
The Internet’s Best Web Devs Compete in CSS | Quarter Finals
We brought 16 of the worlds best CSS developers to compete head to head. https://www.madcss.com Follow / subscribe to all of our featured competitors: Kevin Powell @KevinPowell …
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CJ @w3cj.com · 12/03/2026
Here's my guide to the local AI landscape. Hardware, setup and models. I also give my overall impressions after using local models for the past few weeks. Watch: 🍿 www.youtube.com/watch?v=QKdK...
youtube.com
You Guide To Local AI | Hardware, Setup and Models
YouTube video by Syntax
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CJ @w3cj.com · 06/03/2026
So stoked for this! Don't forget to tune in to the premiere in about 40 minutes!
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CJ @w3cj.com · 05/03/2026
MADCSS DOT COM MADCSS DOT COM MADCSS DOT COM MADCSS DOT COM Tune in March 6th 10AM ET
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CJ @w3cj.com · 04/03/2026
ITS HAPPENING!!!! Get your bracket picks in before it starts!
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CJ @w3cj.com · 02/03/2026
Who do you think will win the March MadCSS tournament? Fill out your bracket before March 6th for a chance to win some really dope stuff: madcss.com
A photo of all the things you can win if you win the MadCSS bracket challenge. $1500 worth of stuff for first prize including one of every single thing from the syntax store, one of all the MadCSS exclusive merch AND a $69 taco bell gift card.A photo of the MadCSS tournament bracket. Including all 16 participants and all 8 round 1 match ups.
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CJ @w3cj.com · 02/03/2026
Agreed. Hono is hands down the best for JS / TS APIs right now.
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CJ @w3cj.com · 02/03/2026
The JS ecosystem leaves a lot to be desired. Most frameworks are just routing systems with a little bit of data loading sprinkled on top. Something closer to Laravel / Rails like AdonisJS would be ideal but many devs are already bought in to React/Next.js. Nothing comes close to combining the 2.
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CJ @w3cj.com · 02/03/2026
Nice! I haven't given it a try yet but it looks really compelling.
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CJ @w3cj.com · 02/03/2026
If you were building a full stack JS framework from scratch today, what would you add that is missing from Next.js, SvelteKit, Nuxt, Tanstack Start and Solid Start?
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CJ @w3cj.com · 25/02/2026
The lack of route level middleware in Next.js has always bugged me. Claude added the feature to vinext in under an hour! Unlikely to be merged in but vinext being vite based makes things like this possible! Code: github.com/w3cj/vinext/... Demo: vinext-route-proxy-examples.cj-syntax.workers.dev
github.com
Add route level proxy by w3cj · Pull Request #1 · w3cj/vinext
vinext currently only supports a single top-level proxy.ts/middleware.ts that runs before all routes — the same limitation as Next.js. Users must use matcher patterns and if/else to scope logic to ...
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CJ @w3cj.com · 10/02/2026
I have been using SearXNG as my daily driver search engine and it's been great! I show what it is and how to set it up in my latest video I also take a look at Perplexica - a self hosted AI answer engine that uses SearXNG under the hood watch 🍿: www.youtube.com/watch?v=9pNM...
youtube.com
search results suck right now, use THIS instead
YouTube video by Syntax
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CJ @w3cj.com · 20/01/2026
😄 I'll be hosting / refereeing / setting the challenges! We had to have someone on the inside and not competing to make it fair for the others.
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CJ @w3cj.com · 18/01/2026
Crazy! Glad I have the alt text as backup. The more you know 🌈
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CJ @w3cj.com · 18/01/2026
i took this picture, further proof we live in a simulation
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CJ @w3cj.com · 18/01/2026
me neither! was a little after 10pm
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