free. fun.
purrfect.
learn by building real apps.
No dry lectures or generic walls of text. Master full-stack web architecture, AI agents, and modern frameworks through interactive visual diagrams, hands-on courses, podcasts, and blog posts with AJ.
“No bloated build tools. Pure edge speed!”
learn by building.
Visual diagrams first. Real code second. Ship faster.
Visual architecture diagram
Explore Courses→meet real codingcat
learners & guests
PODCASTUnfiltered engineering talks on modern web frameworks, edge compute, and AI agent architectures.
GenAI for Engineers, What's Real, What's Not and What's Coming
Full Video + Interactive Show Notes
courses.
Flagship 1: Programmatic Video with React, Remotion & Agent Skills
Master declarative React video composition with Remotion and Remotion Skills. Learn how to teach AI coding agents to render multi-aspect-ratio 60fps product launch videos without timer drift.
Flagship 2: Agentic 3D Web Pipelines with Blender, Blender MCP & Three.js
Go behind the scenes of how we built 3D AJ the Cat on CodingCat.dev. Connect AI agents to Blender via Blender MCP, export compact glTF 2.0 (.glb) armatures, and render them in Three.js with deterministic window.seek(t) physics.
Flagship 3: Deterministic HTML Motion & Critique with HyperFrames, GSAP, Impeccable & Chrome DevTools MCP
Build framework-agnostic HTML-to-video pipelines for AI agents. Combine HyperFrames, paused GSAP timelines, Impeccable design linting, and Chrome DevTools MCP self-healing visual inspection.
latest podcasts.
Chronological video and audio episodes with the builders behind modern web frameworks, cloud databases, and AI tools.
GenAI for Engineers, What's Real, What's Not and What's Coming
Curious about GenAI for engineers? Learn what's real, what's not, and what's next in AI.
How OAuth, MCP, and the OpenAI Apps SDK, Power the Next Generation of Interactive AI Experiences (with Stytch & OpenAI)
Curious about OAuth, MCP servers, and building cool ChatGPT apps? Hear from Max of Stytch as we dive deep, break down the tech, and build a Tamagotchi together!
Firebase SQL with Data Connect
Firebase SQL with Data Connect how to use semantic searches with vector embeddings.
Identity in AI Agents
Explore AI identity management with expert insights on MCP servers, agent security, OAuth, and future standards in AI. Unlock best practices and industry trends.
most-watched episodes.
Community-favorite podcast episodes covering web development, cloud architecture, and developer workflows.
Firebase SQL with Data Connect
Firebase SQL with Data Connect how to use semantic searches with vector embeddings.
Fireship.io
A deep dive into the master behind fireship.io Jeff Delaney. Jeff explains how he makes such great tutorials.
How OAuth, MCP, and the OpenAI Apps SDK, Power the Next Generation of Interactive AI Experiences (with Stytch & OpenAI)
Curious about OAuth, MCP servers, and building cool ChatGPT apps? Hear from Max of Stytch as we dive deep, break down the tech, and build a Tamagotchi together!
AI for System Design and Architecture Documentation
Learn how AI transforms system design and architecture with insights from Multiplayer's CTO. Explore new tools and collaborative features for developers.
latest blog posts.
Chronological blog posts, hands-on code guides, and visual architecture diagrams.
The 14 Open-Source Repos Powering Code-Driven Video in 2026: How We Built 3D AJ the Cat
Why viral 'one-prompt' AI videos are actually 9,500-character production harnesses backed by deterministic frame functions, closed-form springs, and contact-sheet critique loops. Here is the full architectural breakdown of all 14 open-source repos and how we used them to build our interactive 3D AJ the Cat mascot and Course Factory.
Anthropic's S-1, $518B in cloud commitments, and circular AI capex
Anthropic just filed its Form S-1 for a Nasdaq IPO under ticker ANT, revealing $518B in take-or-pay cloud commitments to Google, AWS, and Microsoft. Here is how Mark Zuckerberg, Elon Musk, Jensen Huang, Sundar Pichai, Satya Nadella, Tim Cook, and Dario Amodei built a circular revenue machine, and what happens to your S&P 500 ETF if it stalls.
PHP2Shell (CVE-2026-109618): How AI Found a Decade-Old Bug in 70% of the Web
Two critical pre-authentication RCE flaws in PHP (CVE-2026-109618 and CVE-2026-109619), uncovered by AI models from OpenAI and Google Gemini, sparked a global patching scramble across 70% of the web. Here is how PHP2Shell works and how to patch your servers.
Sanity Knowledge Bases
Eliminate query-time guessing in your AI agents. Learn how Sanity Context Knowledge Bases compile structured datasets, crawled documentation websites, and uploaded files ahead of time, resolve conflicting facts, and serve a compact outline over Context MCP.
“Build apps by understanding the network boundary.”
export async function GET({ locals }: APIContext) {
// Stream Sanity content + edge HTML in a single roundtrip
const data = await locals.sanity.loadQuery(homePageQuery);
return new Response(JSON.stringify(data), {
headers: { "cache-control": "public, s-maxage=3600" },
});
}“Streaming edge HTML beats heavy client-side hydration bundles every single day of the week!”