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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.
Courses & Lessons
Podcasts & Video
Blog & Diagrams
codingcat-app-flow.diagram
VISUAL DIAGRAM Root Orchestrator
<CodingCatApp />
? Router & Auth
STATE Signals Engine
DATA Edge Cache
✏️ AJ's Tip:
“No bloated build tools. Pure edge speed!”
⚡ WebSockets & AI Stream
learn by building. Visual diagrams first. Real code second. Ship faster.
✏️ Updated Weekly
SYSTEM ARCHITECTURE DIAGRAM
Full-Stack SSR Sunny Yellow ↓ ↓ Candy Purple
latest podcasts. Chronological video and audio episodes with the builders behind modern web frameworks, cloud databases, and AI tools.
All Podcasts → November 19, 2025 Podcast
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.
Watch Episode →
November 4, 2025 Podcast
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!
Watch Episode →
October 28, 2025 Podcast
Firebase SQL with Data Connect Firebase SQL with Data Connect how to use semantic searches with vector embeddings.
Watch Episode →
October 23, 2025 Podcast
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.
Watch Episode →
most-watched episodes. Community-favorite podcast episodes covering web development, cloud architecture, and developer workflows.
Browse Podcasts → October 28, 2025 Podcast
Firebase SQL with Data Connect Firebase SQL with Data Connect how to use semantic searches with vector embeddings.
Watch Episode →
January 1, 2021 Podcast
Fireship.io A deep dive into the master behind fireship.io Jeff Delaney. Jeff explains how he makes such great tutorials.
Watch Episode →
November 4, 2025 Podcast
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!
Watch Episode →
July 8, 2024 Podcast
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.
Watch Episode →
latest blog posts. Chronological blog posts, hands-on code guides, and visual architecture diagrams.
All Blog Posts → November 4, 2026 Blog Post
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.
Read Post →
October 26, 2026 Blog Post
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.
Read Post →
October 22, 2026 Blog Post
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.
Read Post →
October 17, 2026 Blog Post
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.
Read Post →
⚡ ARCHITECTURE NOTE
“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" },
});
}📌 AJ's Architecture Rule:
“Streaming edge HTML beats heavy client-side hydration bundles every single day of the week!”
VERIFIED ON WORKERS ✓ 100% A11Y
